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Posted to commits@nifi.apache.org by ph...@apache.org on 2018/01/02 18:28:22 UTC
[27/51] [partial] nifi-minifi-cpp git commit: MINIFICPP-351: Remove
Civetweb third party directory
http://git-wip-us.apache.org/repos/asf/nifi-minifi-cpp/blob/ede68a10/thirdparty/civetweb-1.10/src/third_party/duktape-1.5.2/src-separate/duk_bi_json.c
----------------------------------------------------------------------
diff --git a/thirdparty/civetweb-1.10/src/third_party/duktape-1.5.2/src-separate/duk_bi_json.c b/thirdparty/civetweb-1.10/src/third_party/duktape-1.5.2/src-separate/duk_bi_json.c
deleted file mode 100644
index d05ccd9..0000000
--- a/thirdparty/civetweb-1.10/src/third_party/duktape-1.5.2/src-separate/duk_bi_json.c
+++ /dev/null
@@ -1,3143 +0,0 @@
-/*
- * JSON built-ins.
- *
- * See doc/json.rst.
- *
- * Codepoints are handled as duk_uint_fast32_t to ensure that the full
- * unsigned 32-bit range is supported. This matters to e.g. JX.
- *
- * Input parsing doesn't do an explicit end-of-input check at all. This is
- * safe: input string data is always NUL-terminated (0x00) and valid JSON
- * inputs never contain plain NUL characters, so that as long as syntax checks
- * are correct, we'll never read past the NUL. This approach reduces code size
- * and improves parsing performance, but it's critical that syntax checks are
- * indeed correct!
- */
-
-#include "duk_internal.h"
-
-/*
- * Local defines and forward declarations.
- */
-
-#define DUK__JSON_DECSTR_BUFSIZE 128
-#define DUK__JSON_DECSTR_CHUNKSIZE 64
-#define DUK__JSON_ENCSTR_CHUNKSIZE 64
-#define DUK__JSON_STRINGIFY_BUFSIZE 128
-#define DUK__JSON_MAX_ESC_LEN 10 /* '\Udeadbeef' */
-
-DUK_LOCAL_DECL void duk__dec_syntax_error(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_eat_white(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL duk_uint8_t duk__dec_peek(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL duk_uint8_t duk__dec_get(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL duk_uint8_t duk__dec_get_nonwhite(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL duk_uint_fast32_t duk__dec_decode_hex_escape(duk_json_dec_ctx *js_ctx, duk_small_uint_t n);
-DUK_LOCAL_DECL void duk__dec_req_stridx(duk_json_dec_ctx *js_ctx, duk_small_uint_t stridx);
-DUK_LOCAL_DECL void duk__dec_string(duk_json_dec_ctx *js_ctx);
-#ifdef DUK_USE_JX
-DUK_LOCAL_DECL void duk__dec_plain_string(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_pointer(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_buffer(duk_json_dec_ctx *js_ctx);
-#endif
-DUK_LOCAL_DECL void duk__dec_number(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_objarr_entry(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_objarr_exit(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_object(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_array(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_value(duk_json_dec_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__dec_reviver_walk(duk_json_dec_ctx *js_ctx);
-
-DUK_LOCAL_DECL void duk__emit_1(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch);
-DUK_LOCAL_DECL void duk__emit_2(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch1, duk_uint_fast8_t ch2);
-DUK_LOCAL_DECL void duk__unemit_1(duk_json_enc_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__emit_hstring(duk_json_enc_ctx *js_ctx, duk_hstring *h);
-#if defined(DUK_USE_FASTINT)
-DUK_LOCAL_DECL void duk__emit_cstring(duk_json_enc_ctx *js_ctx, const char *p);
-#endif
-DUK_LOCAL_DECL void duk__emit_stridx(duk_json_enc_ctx *js_ctx, duk_small_uint_t stridx);
-DUK_LOCAL_DECL duk_uint8_t *duk__emit_esc_auto_fast(duk_json_enc_ctx *js_ctx, duk_uint_fast32_t cp, duk_uint8_t *q);
-DUK_LOCAL_DECL void duk__enc_key_autoquote(duk_json_enc_ctx *js_ctx, duk_hstring *k);
-DUK_LOCAL_DECL void duk__enc_quote_string(duk_json_enc_ctx *js_ctx, duk_hstring *h_str);
-DUK_LOCAL_DECL void duk__enc_objarr_entry(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top);
-DUK_LOCAL_DECL void duk__enc_objarr_exit(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top);
-DUK_LOCAL_DECL void duk__enc_object(duk_json_enc_ctx *js_ctx);
-DUK_LOCAL_DECL void duk__enc_array(duk_json_enc_ctx *js_ctx);
-DUK_LOCAL_DECL duk_bool_t duk__enc_value(duk_json_enc_ctx *js_ctx, duk_idx_t idx_holder);
-DUK_LOCAL_DECL duk_bool_t duk__enc_allow_into_proplist(duk_tval *tv);
-DUK_LOCAL_DECL void duk__enc_double(duk_json_enc_ctx *js_ctx);
-#if defined(DUK_USE_FASTINT)
-DUK_LOCAL_DECL void duk__enc_fastint_tval(duk_json_enc_ctx *js_ctx, duk_tval *tv);
-#endif
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
-DUK_LOCAL_DECL void duk__enc_buffer(duk_json_enc_ctx *js_ctx, duk_hbuffer *h);
-DUK_LOCAL_DECL void duk__enc_pointer(duk_json_enc_ctx *js_ctx, void *ptr);
-DUK_LOCAL_DECL void duk__enc_bufferobject(duk_json_enc_ctx *js_ctx, duk_hbufferobject *h_bufobj);
-#endif
-DUK_LOCAL_DECL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_int_t depth);
-
-/*
- * Helper tables
- */
-
-#if defined(DUK_USE_JSON_QUOTESTRING_FASTPATH)
-DUK_LOCAL const duk_uint8_t duk__json_quotestr_lookup[256] = {
- /* 0x00 ... 0x7f: as is
- * 0x80: escape generically
- * 0x81: slow path
- * 0xa0 ... 0xff: backslash + one char
- */
-
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0xe2, 0xf4, 0xee, 0x80, 0xe6, 0xf2, 0x80, 0x80,
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
- 0x20, 0x21, 0xa2, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0xdc, 0x5d, 0x5e, 0x5f,
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
- 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81
-};
-#else /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
-DUK_LOCAL const duk_uint8_t duk__json_quotestr_esc[14] = {
- DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL,
- DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL,
- DUK_ASC_LC_B, DUK_ASC_LC_T, DUK_ASC_LC_N, DUK_ASC_NUL,
- DUK_ASC_LC_F, DUK_ASC_LC_R
-};
-#endif /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
-
-#if defined(DUK_USE_JSON_DECSTRING_FASTPATH)
-DUK_LOCAL const duk_uint8_t duk__json_decstr_lookup[256] = {
- /* 0x00: slow path
- * other: as is
- */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x20, 0x21, 0x00, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x00, 0x5d, 0x5e, 0x5f,
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
- 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
- 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
- 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
- 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
- 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
-};
-#endif /* DUK_USE_JSON_DECSTRING_FASTPATH */
-
-#if defined(DUK_USE_JSON_EATWHITE_FASTPATH)
-DUK_LOCAL const duk_uint8_t duk__json_eatwhite_lookup[256] = {
- /* 0x00: finish (non-white)
- * 0x01: continue
- */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-#endif /* DUK_USE_JSON_EATWHITE_FASTPATH */
-
-#if defined(DUK_USE_JSON_DECNUMBER_FASTPATH)
-DUK_LOCAL const duk_uint8_t duk__json_decnumber_lookup[256] = {
- /* 0x00: finish (not part of number)
- * 0x01: continue
- */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x01, 0x00,
- 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-#endif /* DUK_USE_JSON_DECNUMBER_FASTPATH */
-
-/*
- * Parsing implementation.
- *
- * JSON lexer is now separate from duk_lexer.c because there are numerous
- * small differences making it difficult to share the lexer.
- *
- * The parser here works with raw bytes directly; this works because all
- * JSON delimiters are ASCII characters. Invalid xUTF-8 encoded values
- * inside strings will be passed on without normalization; this is not a
- * compliance concern because compliant inputs will always be valid
- * CESU-8 encodings.
- */
-
-DUK_LOCAL void duk__dec_syntax_error(duk_json_dec_ctx *js_ctx) {
- /* Shared handler to minimize parser size. Cause will be
- * hidden, unfortunately, but we'll have an offset which
- * is often quite enough.
- */
- DUK_ERROR_FMT1(js_ctx->thr, DUK_ERR_SYNTAX_ERROR, DUK_STR_FMT_INVALID_JSON,
- (long) (js_ctx->p - js_ctx->p_start));
-}
-
-DUK_LOCAL void duk__dec_eat_white(duk_json_dec_ctx *js_ctx) {
- const duk_uint8_t *p;
- duk_uint8_t t;
-
- p = js_ctx->p;
- for (;;) {
- DUK_ASSERT(p <= js_ctx->p_end);
- t = *p;
-
-#if defined(DUK_USE_JSON_EATWHITE_FASTPATH)
- /* This fast path is pretty marginal in practice.
- * XXX: candidate for removal.
- */
- DUK_ASSERT(duk__json_eatwhite_lookup[0x00] == 0x00); /* end-of-input breaks */
- if (duk__json_eatwhite_lookup[t] == 0) {
- break;
- }
-#else /* DUK_USE_JSON_EATWHITE_FASTPATH */
- if (!(t == 0x20 || t == 0x0a || t == 0x0d || t == 0x09)) {
- /* NUL also comes here. Comparison order matters, 0x20
- * is most common whitespace.
- */
- break;
- }
-#endif /* DUK_USE_JSON_EATWHITE_FASTPATH */
- p++;
- }
- js_ctx->p = p;
-}
-
-DUK_LOCAL duk_uint8_t duk__dec_peek(duk_json_dec_ctx *js_ctx) {
- DUK_ASSERT(js_ctx->p <= js_ctx->p_end);
- return *js_ctx->p;
-}
-
-DUK_LOCAL duk_uint8_t duk__dec_get(duk_json_dec_ctx *js_ctx) {
- DUK_ASSERT(js_ctx->p <= js_ctx->p_end);
- return *js_ctx->p++;
-}
-
-DUK_LOCAL duk_uint8_t duk__dec_get_nonwhite(duk_json_dec_ctx *js_ctx) {
- duk__dec_eat_white(js_ctx);
- return duk__dec_get(js_ctx);
-}
-
-/* For JX, expressing the whole unsigned 32-bit range matters. */
-DUK_LOCAL duk_uint_fast32_t duk__dec_decode_hex_escape(duk_json_dec_ctx *js_ctx, duk_small_uint_t n) {
- duk_small_uint_t i;
- duk_uint_fast32_t res = 0;
- duk_uint8_t x;
- duk_small_int_t t;
-
- for (i = 0; i < n; i++) {
- /* XXX: share helper from lexer; duk_lexer.c / hexval(). */
-
- x = duk__dec_get(js_ctx);
- DUK_DDD(DUK_DDDPRINT("decode_hex_escape: i=%ld, n=%ld, res=%ld, x=%ld",
- (long) i, (long) n, (long) res, (long) x));
-
- /* x == 0x00 (EOF) causes syntax_error */
- DUK_ASSERT(duk_hex_dectab[0] == -1);
- t = duk_hex_dectab[x & 0xff];
- if (DUK_LIKELY(t >= 0)) {
- res = (res * 16) + t;
- } else {
- /* catches EOF and invalid digits */
- goto syntax_error;
- }
- }
-
- DUK_DDD(DUK_DDDPRINT("final hex decoded value: %ld", (long) res));
- return res;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
- return 0;
-}
-
-DUK_LOCAL void duk__dec_req_stridx(duk_json_dec_ctx *js_ctx, duk_small_uint_t stridx) {
- duk_hstring *h;
- const duk_uint8_t *p;
- duk_uint8_t x, y;
-
- /* First character has already been eaten and checked by the caller.
- * We can scan until a NUL in stridx string because no built-in strings
- * have internal NULs.
- */
-
- DUK_ASSERT_DISABLE(stridx >= 0); /* unsigned */
- DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
- h = DUK_HTHREAD_GET_STRING(js_ctx->thr, stridx);
- DUK_ASSERT(h != NULL);
-
- p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h) + 1;
- DUK_ASSERT(*(js_ctx->p - 1) == *(p - 1)); /* first character has been matched */
-
- for (;;) {
- x = *p;
- if (x == 0) {
- break;
- }
- y = duk__dec_get(js_ctx);
- if (x != y) {
- /* Catches EOF of JSON input. */
- goto syntax_error;
- }
- p++;
- }
-
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-
-DUK_LOCAL duk_small_int_t duk__dec_string_escape(duk_json_dec_ctx *js_ctx, duk_uint8_t **ext_p) {
- duk_uint_fast32_t cp;
-
- /* EOF (-1) will be cast to an unsigned value first
- * and then re-cast for the switch. In any case, it
- * will match the default case (syntax error).
- */
- cp = (duk_uint_fast32_t) duk__dec_get(js_ctx);
- switch ((int) cp) {
- case DUK_ASC_BACKSLASH: break;
- case DUK_ASC_DOUBLEQUOTE: break;
- case DUK_ASC_SLASH: break;
- case DUK_ASC_LC_T: cp = 0x09; break;
- case DUK_ASC_LC_N: cp = 0x0a; break;
- case DUK_ASC_LC_R: cp = 0x0d; break;
- case DUK_ASC_LC_F: cp = 0x0c; break;
- case DUK_ASC_LC_B: cp = 0x08; break;
- case DUK_ASC_LC_U: {
- cp = duk__dec_decode_hex_escape(js_ctx, 4);
- break;
- }
-#ifdef DUK_USE_JX
- case DUK_ASC_UC_U: {
- if (js_ctx->flag_ext_custom) {
- cp = duk__dec_decode_hex_escape(js_ctx, 8);
- } else {
- return 1; /* syntax error */
- }
- break;
- }
- case DUK_ASC_LC_X: {
- if (js_ctx->flag_ext_custom) {
- cp = duk__dec_decode_hex_escape(js_ctx, 2);
- } else {
- return 1; /* syntax error */
- }
- break;
- }
-#endif /* DUK_USE_JX */
- default:
- /* catches EOF (0x00) */
- return 1; /* syntax error */
- }
-
- DUK_RAW_WRITE_XUTF8(*ext_p, cp);
-
- return 0;
-}
-
-DUK_LOCAL void duk__dec_string(duk_json_dec_ctx *js_ctx) {
- duk_hthread *thr = js_ctx->thr;
- duk_context *ctx = (duk_context *) thr;
- duk_bufwriter_ctx bw_alloc;
- duk_bufwriter_ctx *bw;
- duk_uint8_t *q;
-
- /* '"' was eaten by caller */
-
- /* Note that we currently parse -bytes-, not codepoints.
- * All non-ASCII extended UTF-8 will encode to bytes >= 0x80,
- * so they'll simply pass through (valid UTF-8 or not).
- */
-
- bw = &bw_alloc;
- DUK_BW_INIT_PUSHBUF(js_ctx->thr, bw, DUK__JSON_DECSTR_BUFSIZE);
- q = DUK_BW_GET_PTR(js_ctx->thr, bw);
-
-#if defined(DUK_USE_JSON_DECSTRING_FASTPATH)
- for (;;) {
- duk_small_uint_t safe;
- duk_uint8_t b, x;
- const duk_uint8_t *p;
-
- /* Select a safe loop count where no output checks are
- * needed assuming we won't encounter escapes. Input
- * bound checks are not necessary as a NUL (guaranteed)
- * will cause a SyntaxError before we read out of bounds.
- */
-
- safe = DUK__JSON_DECSTR_CHUNKSIZE;
-
- /* Ensure space for 1:1 output plus one escape. */
- q = DUK_BW_ENSURE_RAW(js_ctx->thr, bw, safe + DUK_UNICODE_MAX_XUTF8_LENGTH, q);
-
- p = js_ctx->p; /* temp copy, write back for next loop */
- for (;;) {
- if (safe == 0) {
- js_ctx->p = p;
- break;
- }
- safe--;
-
- /* End of input (NUL) goes through slow path and causes SyntaxError. */
- DUK_ASSERT(duk__json_decstr_lookup[0] == 0x00);
-
- b = *p++;
- x = (duk_small_int_t) duk__json_decstr_lookup[b];
- if (DUK_LIKELY(x != 0)) {
- /* Fast path, decode as is. */
- *q++ = b;
- } else if (b == DUK_ASC_DOUBLEQUOTE) {
- js_ctx->p = p;
- goto found_quote;
- } else if (b == DUK_ASC_BACKSLASH) {
- /* We've ensured space for one escaped input; then
- * bail out and recheck (this makes escape handling
- * quite slow but it's uncommon).
- */
- js_ctx->p = p;
- if (duk__dec_string_escape(js_ctx, &q) != 0) {
- goto syntax_error;
- }
- break;
- } else {
- js_ctx->p = p;
- goto syntax_error;
- }
- }
- }
- found_quote:
-#else /* DUK_USE_JSON_DECSTRING_FASTPATH */
- for (;;) {
- duk_uint8_t x;
-
- q = DUK_BW_ENSURE_RAW(js_ctx->thr, bw, DUK_UNICODE_MAX_XUTF8_LENGTH, q);
-
- x = duk__dec_get(js_ctx);
-
- if (x == DUK_ASC_DOUBLEQUOTE) {
- break;
- } else if (x == DUK_ASC_BACKSLASH) {
- if (duk__dec_string_escape(js_ctx, &q) != 0) {
- goto syntax_error;
- }
- } else if (x < 0x20) {
- /* catches EOF (NUL) */
- goto syntax_error;
- } else {
- *q++ = (duk_uint8_t) x;
- }
- }
-#endif /* DUK_USE_JSON_DECSTRING_FASTPATH */
-
- DUK_BW_SETPTR_AND_COMPACT(js_ctx->thr, bw, q);
- duk_to_string(ctx, -1);
-
- /* [ ... str ] */
-
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-
-#ifdef DUK_USE_JX
-/* Decode a plain string consisting entirely of identifier characters.
- * Used to parse plain keys (e.g. "foo: 123").
- */
-DUK_LOCAL void duk__dec_plain_string(duk_json_dec_ctx *js_ctx) {
- duk_hthread *thr = js_ctx->thr;
- duk_context *ctx = (duk_context *) thr;
- const duk_uint8_t *p;
- duk_small_int_t x;
-
- /* Caller has already eaten the first char so backtrack one byte. */
-
- js_ctx->p--; /* safe */
- p = js_ctx->p;
-
- /* Here again we parse bytes, and non-ASCII UTF-8 will cause end of
- * parsing (which is correct except if there are non-shortest encodings).
- * There is also no need to check explicitly for end of input buffer as
- * the input is NUL padded and NUL will exit the parsing loop.
- *
- * Because no unescaping takes place, we can just scan to the end of the
- * plain string and intern from the input buffer.
- */
-
- for (;;) {
- x = *p;
-
- /* There is no need to check the first character specially here
- * (i.e. reject digits): the caller only accepts valid initial
- * characters and won't call us if the first character is a digit.
- * This also ensures that the plain string won't be empty.
- */
-
- if (!duk_unicode_is_identifier_part((duk_codepoint_t) x)) {
- break;
- }
- p++;
- }
-
- duk_push_lstring(ctx, (const char *) js_ctx->p, (duk_size_t) (p - js_ctx->p));
- js_ctx->p = p;
-
- /* [ ... str ] */
-}
-#endif /* DUK_USE_JX */
-
-#ifdef DUK_USE_JX
-DUK_LOCAL void duk__dec_pointer(duk_json_dec_ctx *js_ctx) {
- duk_hthread *thr = js_ctx->thr;
- duk_context *ctx = (duk_context *) thr;
- const duk_uint8_t *p;
- duk_small_int_t x;
- void *voidptr;
-
- /* Caller has already eaten the first character ('(') which we don't need. */
-
- p = js_ctx->p;
-
- for (;;) {
- x = *p;
-
- /* Assume that the native representation never contains a closing
- * parenthesis.
- */
-
- if (x == DUK_ASC_RPAREN) {
- break;
- } else if (x <= 0) {
- /* NUL term or -1 (EOF), NUL check would suffice */
- goto syntax_error;
- }
- p++;
- }
-
- /* There is no need to NUL delimit the sscanf() call: trailing garbage is
- * ignored and there is always a NUL terminator which will force an error
- * if no error is encountered before it. It's possible that the scan
- * would scan further than between [js_ctx->p,p[ though and we'd advance
- * by less than the scanned value.
- *
- * Because pointers are platform specific, a failure to scan a pointer
- * results in a null pointer which is a better placeholder than a missing
- * value or an error.
- */
-
- voidptr = NULL;
- (void) DUK_SSCANF((const char *) js_ctx->p, DUK_STR_FMT_PTR, &voidptr);
- duk_push_pointer(ctx, voidptr);
- js_ctx->p = p + 1; /* skip ')' */
-
- /* [ ... ptr ] */
-
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-#endif /* DUK_USE_JX */
-
-#ifdef DUK_USE_JX
-DUK_LOCAL void duk__dec_buffer(duk_json_dec_ctx *js_ctx) {
- duk_hthread *thr = js_ctx->thr;
- duk_context *ctx = (duk_context *) thr;
- const duk_uint8_t *p;
- duk_uint8_t *buf;
- duk_size_t src_len;
- duk_small_int_t x;
-
- /* Caller has already eaten the first character ('|') which we don't need. */
-
- p = js_ctx->p;
-
- /* XXX: Would be nice to share the fast path loop from duk_hex_decode()
- * and avoid creating a temporary buffer. However, there are some
- * differences which prevent trivial sharing:
- *
- * - Pipe char detection
- * - EOF detection
- * - Unknown length of input and output
- *
- * The best approach here would be a bufwriter and a reasonaly sized
- * safe inner loop (e.g. 64 output bytes at a time).
- */
-
- for (;;) {
- x = *p;
-
- /* This loop intentionally does not ensure characters are valid
- * ([0-9a-fA-F]) because the hex decode call below will do that.
- */
- if (x == DUK_ASC_PIPE) {
- break;
- } else if (x <= 0) {
- /* NUL term or -1 (EOF), NUL check would suffice */
- goto syntax_error;
- }
- p++;
- }
-
- src_len = (duk_size_t) (p - js_ctx->p);
- buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, src_len);
- DUK_ASSERT(buf != NULL);
- DUK_MEMCPY((void *) buf, (const void *) js_ctx->p, src_len);
- duk_hex_decode(ctx, -1);
-
- js_ctx->p = p + 1; /* skip '|' */
-
- /* [ ... buf ] */
-
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-#endif /* DUK_USE_JX */
-
-/* Parse a number, other than NaN or +/- Infinity */
-DUK_LOCAL void duk__dec_number(duk_json_dec_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- const duk_uint8_t *p_start;
- const duk_uint8_t *p;
- duk_uint8_t x;
- duk_small_uint_t s2n_flags;
-
- DUK_DDD(DUK_DDDPRINT("parse_number"));
-
- p_start = js_ctx->p;
-
- /* First pass parse is very lenient (e.g. allows '1.2.3') and extracts a
- * string for strict number parsing.
- */
-
- p = js_ctx->p;
- for (;;) {
- x = *p;
-
- DUK_DDD(DUK_DDDPRINT("parse_number: p_start=%p, p=%p, p_end=%p, x=%ld",
- (const void *) p_start, (const void *) p,
- (const void *) js_ctx->p_end, (long) x));
-
-#if defined(DUK_USE_JSON_DECNUMBER_FASTPATH)
- /* This fast path is pretty marginal in practice.
- * XXX: candidate for removal.
- */
- DUK_ASSERT(duk__json_decnumber_lookup[0x00] == 0x00); /* end-of-input breaks */
- if (duk__json_decnumber_lookup[x] == 0) {
- break;
- }
-#else /* DUK_USE_JSON_DECNUMBER_FASTPATH */
- if (!((x >= DUK_ASC_0 && x <= DUK_ASC_9) ||
- (x == DUK_ASC_PERIOD || x == DUK_ASC_LC_E ||
- x == DUK_ASC_UC_E || x == DUK_ASC_MINUS || x == DUK_ASC_PLUS))) {
- /* Plus sign must be accepted for positive exponents
- * (e.g. '1.5e+2'). This clause catches NULs.
- */
- break;
- }
-#endif /* DUK_USE_JSON_DECNUMBER_FASTPATH */
- p++; /* safe, because matched (NUL causes a break) */
- }
- js_ctx->p = p;
-
- DUK_ASSERT(js_ctx->p > p_start);
- duk_push_lstring(ctx, (const char *) p_start, (duk_size_t) (p - p_start));
-
- s2n_flags = DUK_S2N_FLAG_ALLOW_EXP |
- DUK_S2N_FLAG_ALLOW_MINUS | /* but don't allow leading plus */
- DUK_S2N_FLAG_ALLOW_FRAC;
-
- DUK_DDD(DUK_DDDPRINT("parse_number: string before parsing: %!T",
- (duk_tval *) duk_get_tval(ctx, -1)));
- duk_numconv_parse(ctx, 10 /*radix*/, s2n_flags);
- if (duk_is_nan(ctx, -1)) {
- duk__dec_syntax_error(js_ctx);
- }
- DUK_ASSERT(duk_is_number(ctx, -1));
- DUK_DDD(DUK_DDDPRINT("parse_number: final number: %!T",
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- /* [ ... num ] */
-}
-
-DUK_LOCAL void duk__dec_objarr_entry(duk_json_dec_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_require_stack(ctx, DUK_JSON_DEC_REQSTACK);
-
- /* c recursion check */
-
- DUK_ASSERT(js_ctx->recursion_depth >= 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- if (js_ctx->recursion_depth >= js_ctx->recursion_limit) {
- DUK_ERROR_RANGE((duk_hthread *) ctx, DUK_STR_JSONDEC_RECLIMIT);
- }
- js_ctx->recursion_depth++;
-}
-
-DUK_LOCAL void duk__dec_objarr_exit(duk_json_dec_ctx *js_ctx) {
- /* c recursion check */
-
- DUK_ASSERT(js_ctx->recursion_depth > 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- js_ctx->recursion_depth--;
-}
-
-DUK_LOCAL void duk__dec_object(duk_json_dec_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_int_t key_count; /* XXX: a "first" flag would suffice */
- duk_uint8_t x;
-
- DUK_DDD(DUK_DDDPRINT("parse_object"));
-
- duk__dec_objarr_entry(js_ctx);
-
- duk_push_object(ctx);
-
- /* Initial '{' has been checked and eaten by caller. */
-
- key_count = 0;
- for (;;) {
- x = duk__dec_get_nonwhite(js_ctx);
-
- DUK_DDD(DUK_DDDPRINT("parse_object: obj=%!T, x=%ld, key_count=%ld",
- (duk_tval *) duk_get_tval(ctx, -1),
- (long) x, (long) key_count));
-
- /* handle comma and closing brace */
-
- if (x == DUK_ASC_COMMA && key_count > 0) {
- /* accept comma, expect new value */
- x = duk__dec_get_nonwhite(js_ctx);
- } else if (x == DUK_ASC_RCURLY) {
- /* eat closing brace */
- break;
- } else if (key_count == 0) {
- /* accept anything, expect first value (EOF will be
- * caught by key parsing below.
- */
- ;
- } else {
- /* catches EOF (NUL) and initial comma */
- goto syntax_error;
- }
-
- /* parse key and value */
-
- if (x == DUK_ASC_DOUBLEQUOTE) {
- duk__dec_string(js_ctx);
-#ifdef DUK_USE_JX
- } else if (js_ctx->flag_ext_custom &&
- duk_unicode_is_identifier_start((duk_codepoint_t) x)) {
- duk__dec_plain_string(js_ctx);
-#endif
- } else {
- goto syntax_error;
- }
-
- /* [ ... obj key ] */
-
- x = duk__dec_get_nonwhite(js_ctx);
- if (x != DUK_ASC_COLON) {
- goto syntax_error;
- }
-
- duk__dec_value(js_ctx);
-
- /* [ ... obj key val ] */
-
- duk_xdef_prop_wec(ctx, -3);
-
- /* [ ... obj ] */
-
- key_count++;
- }
-
- /* [ ... obj ] */
-
- DUK_DDD(DUK_DDDPRINT("parse_object: final object is %!T",
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- duk__dec_objarr_exit(js_ctx);
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-
-DUK_LOCAL void duk__dec_array(duk_json_dec_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_uarridx_t arr_idx;
- duk_uint8_t x;
-
- DUK_DDD(DUK_DDDPRINT("parse_array"));
-
- duk__dec_objarr_entry(js_ctx);
-
- duk_push_array(ctx);
-
- /* Initial '[' has been checked and eaten by caller. */
-
- arr_idx = 0;
- for (;;) {
- x = duk__dec_get_nonwhite(js_ctx);
-
- DUK_DDD(DUK_DDDPRINT("parse_array: arr=%!T, x=%ld, arr_idx=%ld",
- (duk_tval *) duk_get_tval(ctx, -1),
- (long) x, (long) arr_idx));
-
- /* handle comma and closing bracket */
-
- if ((x == DUK_ASC_COMMA) && (arr_idx != 0)) {
- /* accept comma, expect new value */
- ;
- } else if (x == DUK_ASC_RBRACKET) {
- /* eat closing bracket */
- break;
- } else if (arr_idx == 0) {
- /* accept anything, expect first value (EOF will be
- * caught by duk__dec_value() below.
- */
- js_ctx->p--; /* backtrack (safe) */
- } else {
- /* catches EOF (NUL) and initial comma */
- goto syntax_error;
- }
-
- /* parse value */
-
- duk__dec_value(js_ctx);
-
- /* [ ... arr val ] */
-
- duk_xdef_prop_index_wec(ctx, -2, arr_idx);
- arr_idx++;
- }
-
- /* Must set 'length' explicitly when using duk_xdef_prop_xxx() to
- * set the values.
- */
-
- duk_set_length(ctx, -1, arr_idx);
-
- /* [ ... arr ] */
-
- DUK_DDD(DUK_DDDPRINT("parse_array: final array is %!T",
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- duk__dec_objarr_exit(js_ctx);
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-
-DUK_LOCAL void duk__dec_value(duk_json_dec_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_uint8_t x;
-
- x = duk__dec_get_nonwhite(js_ctx);
-
- DUK_DDD(DUK_DDDPRINT("parse_value: initial x=%ld", (long) x));
-
- /* Note: duk__dec_req_stridx() backtracks one char */
-
- if (x == DUK_ASC_DOUBLEQUOTE) {
- duk__dec_string(js_ctx);
- } else if ((x >= DUK_ASC_0 && x <= DUK_ASC_9) || (x == DUK_ASC_MINUS)) {
-#ifdef DUK_USE_JX
- if (js_ctx->flag_ext_custom && x == DUK_ASC_MINUS && duk__dec_peek(js_ctx) == DUK_ASC_UC_I) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_MINUS_INFINITY); /* "-Infinity", '-' has been eaten */
- duk_push_number(ctx, -DUK_DOUBLE_INFINITY);
- } else {
-#else
- { /* unconditional block */
-#endif
- /* We already ate 'x', so backup one byte. */
- js_ctx->p--; /* safe */
- duk__dec_number(js_ctx);
- }
- } else if (x == DUK_ASC_LC_T) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_TRUE);
- duk_push_true(ctx);
- } else if (x == DUK_ASC_LC_F) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_FALSE);
- duk_push_false(ctx);
- } else if (x == DUK_ASC_LC_N) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_LC_NULL);
- duk_push_null(ctx);
-#ifdef DUK_USE_JX
- } else if (js_ctx->flag_ext_custom && x == DUK_ASC_LC_U) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_LC_UNDEFINED);
- duk_push_undefined(ctx);
- } else if (js_ctx->flag_ext_custom && x == DUK_ASC_UC_N) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_NAN);
- duk_push_nan(ctx);
- } else if (js_ctx->flag_ext_custom && x == DUK_ASC_UC_I) {
- duk__dec_req_stridx(js_ctx, DUK_STRIDX_INFINITY);
- duk_push_number(ctx, DUK_DOUBLE_INFINITY);
- } else if (js_ctx->flag_ext_custom && x == DUK_ASC_LPAREN) {
- duk__dec_pointer(js_ctx);
- } else if (js_ctx->flag_ext_custom && x == DUK_ASC_PIPE) {
- duk__dec_buffer(js_ctx);
-#endif
- } else if (x == DUK_ASC_LCURLY) {
- duk__dec_object(js_ctx);
- } else if (x == DUK_ASC_LBRACKET) {
- duk__dec_array(js_ctx);
- } else {
- /* catches EOF (NUL) */
- goto syntax_error;
- }
-
- duk__dec_eat_white(js_ctx);
-
- /* [ ... val ] */
- return;
-
- syntax_error:
- duk__dec_syntax_error(js_ctx);
- DUK_UNREACHABLE();
-}
-
-/* Recursive value reviver, implements the Walk() algorithm. No C recursion
- * check is done here because the initial parsing step will already ensure
- * there is a reasonable limit on C recursion depth and hence object depth.
- */
-DUK_LOCAL void duk__dec_reviver_walk(duk_json_dec_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_hobject *h;
- duk_uarridx_t i, arr_len;
-
- DUK_DDD(DUK_DDDPRINT("walk: top=%ld, holder=%!T, name=%!T",
- (long) duk_get_top(ctx),
- (duk_tval *) duk_get_tval(ctx, -2),
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- duk_dup_top(ctx);
- duk_get_prop(ctx, -3); /* -> [ ... holder name val ] */
-
- h = duk_get_hobject(ctx, -1);
- if (h != NULL) {
- if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) {
- arr_len = (duk_uarridx_t) duk_get_length(ctx, -1);
- for (i = 0; i < arr_len; i++) {
- /* [ ... holder name val ] */
-
- DUK_DDD(DUK_DDDPRINT("walk: array, top=%ld, i=%ld, arr_len=%ld, holder=%!T, name=%!T, val=%!T",
- (long) duk_get_top(ctx), (long) i, (long) arr_len,
- (duk_tval *) duk_get_tval(ctx, -3), (duk_tval *) duk_get_tval(ctx, -2),
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- /* XXX: push_uint_string / push_u32_string */
- duk_dup_top(ctx);
- duk_push_uint(ctx, (duk_uint_t) i);
- duk_to_string(ctx, -1); /* -> [ ... holder name val val ToString(i) ] */
- duk__dec_reviver_walk(js_ctx); /* -> [ ... holder name val new_elem ] */
-
- if (duk_is_undefined(ctx, -1)) {
- duk_pop(ctx);
- duk_del_prop_index(ctx, -1, i);
- } else {
- /* XXX: duk_xdef_prop_index_wec() would be more appropriate
- * here but it currently makes some assumptions that might
- * not hold (e.g. that previous property is not an accessor).
- */
- duk_put_prop_index(ctx, -2, i);
- }
- }
- } else {
- /* [ ... holder name val ] */
- duk_enum(ctx, -1, DUK_ENUM_OWN_PROPERTIES_ONLY /*flags*/);
- while (duk_next(ctx, -1 /*enum_index*/, 0 /*get_value*/)) {
- DUK_DDD(DUK_DDDPRINT("walk: object, top=%ld, holder=%!T, name=%!T, val=%!T, enum=%!iT, obj_key=%!T",
- (long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, -5),
- (duk_tval *) duk_get_tval(ctx, -4), (duk_tval *) duk_get_tval(ctx, -3),
- (duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1)));
-
- /* [ ... holder name val enum obj_key ] */
- duk_dup(ctx, -3);
- duk_dup(ctx, -2);
-
- /* [ ... holder name val enum obj_key val obj_key ] */
- duk__dec_reviver_walk(js_ctx);
-
- /* [ ... holder name val enum obj_key new_elem ] */
- if (duk_is_undefined(ctx, -1)) {
- duk_pop(ctx);
- duk_del_prop(ctx, -3);
- } else {
- /* XXX: duk_xdef_prop_index_wec() would be more appropriate
- * here but it currently makes some assumptions that might
- * not hold (e.g. that previous property is not an accessor).
- *
- * Using duk_put_prop() works incorrectly with '__proto__'
- * if the own property with that name has been deleted. This
- * does not happen normally, but a clever reviver can trigger
- * that, see complex reviver case in: test-bug-json-parse-__proto__.js.
- */
- duk_put_prop(ctx, -4);
- }
- }
- duk_pop(ctx); /* pop enum */
- }
- }
-
- /* [ ... holder name val ] */
-
- duk_dup(ctx, js_ctx->idx_reviver);
- duk_insert(ctx, -4); /* -> [ ... reviver holder name val ] */
- duk_call_method(ctx, 2); /* -> [ ... res ] */
-
- DUK_DDD(DUK_DDDPRINT("walk: top=%ld, result=%!T",
- (long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, -1)));
-}
-
-/*
- * Stringify implementation.
- */
-
-#define DUK__EMIT_1(js_ctx,ch) duk__emit_1((js_ctx), (duk_uint_fast8_t) (ch))
-#define DUK__EMIT_2(js_ctx,ch1,ch2) duk__emit_2((js_ctx), (duk_uint_fast8_t) (ch1), (duk_uint_fast8_t) (ch2))
-#define DUK__EMIT_HSTR(js_ctx,h) duk__emit_hstring((js_ctx), (h))
-#if defined(DUK_USE_FASTINT) || defined(DUK_USE_JX) || defined(DUK_USE_JC)
-#define DUK__EMIT_CSTR(js_ctx,p) duk__emit_cstring((js_ctx), (p))
-#endif
-#define DUK__EMIT_STRIDX(js_ctx,i) duk__emit_stridx((js_ctx), (i))
-#define DUK__UNEMIT_1(js_ctx) duk__unemit_1((js_ctx))
-
-DUK_LOCAL void duk__emit_1(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch) {
- DUK_BW_WRITE_ENSURE_U8(js_ctx->thr, &js_ctx->bw, ch);
-}
-
-DUK_LOCAL void duk__emit_2(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch1, duk_uint_fast8_t ch2) {
- DUK_BW_WRITE_ENSURE_U8_2(js_ctx->thr, &js_ctx->bw, ch1, ch2);
-}
-
-DUK_LOCAL void duk__emit_hstring(duk_json_enc_ctx *js_ctx, duk_hstring *h) {
- DUK_BW_WRITE_ENSURE_HSTRING(js_ctx->thr, &js_ctx->bw, h);
-}
-
-#if defined(DUK_USE_FASTINT) || defined(DUK_USE_JX) || defined(DUK_USE_JC)
-DUK_LOCAL void duk__emit_cstring(duk_json_enc_ctx *js_ctx, const char *str) {
- DUK_BW_WRITE_ENSURE_CSTRING(js_ctx->thr, &js_ctx->bw, str);
-}
-#endif
-
-DUK_LOCAL void duk__emit_stridx(duk_json_enc_ctx *js_ctx, duk_small_uint_t stridx) {
- duk_hstring *h;
-
- DUK_ASSERT_DISABLE(stridx >= 0); /* unsigned */
- DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
- h = DUK_HTHREAD_GET_STRING(js_ctx->thr, stridx);
- DUK_ASSERT(h != NULL);
-
- DUK_BW_WRITE_ENSURE_HSTRING(js_ctx->thr, &js_ctx->bw, h);
-}
-
-DUK_LOCAL void duk__unemit_1(duk_json_enc_ctx *js_ctx) {
- DUK_ASSERT(DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw) >= 1);
- DUK_BW_ADD_PTR(js_ctx->thr, &js_ctx->bw, -1);
-}
-
-#define DUK__MKESC(nybbles,esc1,esc2) \
- (((duk_uint_fast32_t) (nybbles)) << 16) | \
- (((duk_uint_fast32_t) (esc1)) << 8) | \
- ((duk_uint_fast32_t) (esc2))
-
-DUK_LOCAL duk_uint8_t *duk__emit_esc_auto_fast(duk_json_enc_ctx *js_ctx, duk_uint_fast32_t cp, duk_uint8_t *q) {
- duk_uint_fast32_t tmp;
- duk_small_uint_t dig;
-
- DUK_UNREF(js_ctx);
-
- /* Caller ensures space for at least DUK__JSON_MAX_ESC_LEN. */
-
- /* Select appropriate escape format automatically, and set 'tmp' to a
- * value encoding both the escape format character and the nybble count:
- *
- * (nybble_count << 16) | (escape_char1) | (escape_char2)
- */
-
-#ifdef DUK_USE_JX
- if (DUK_LIKELY(cp < 0x100UL)) {
- if (DUK_UNLIKELY(js_ctx->flag_ext_custom)) {
- tmp = DUK__MKESC(2, DUK_ASC_BACKSLASH, DUK_ASC_LC_X);
- } else {
- tmp = DUK__MKESC(4, DUK_ASC_BACKSLASH, DUK_ASC_LC_U);
- }
- } else
-#endif
- if (DUK_LIKELY(cp < 0x10000UL)) {
- tmp = DUK__MKESC(4, DUK_ASC_BACKSLASH, DUK_ASC_LC_U);
- } else {
-#ifdef DUK_USE_JX
- if (DUK_LIKELY(js_ctx->flag_ext_custom)) {
- tmp = DUK__MKESC(8, DUK_ASC_BACKSLASH, DUK_ASC_UC_U);
- } else
-#endif
- {
- /* In compatible mode and standard JSON mode, output
- * something useful for non-BMP characters. This won't
- * roundtrip but will still be more or less readable and
- * more useful than an error.
- */
- tmp = DUK__MKESC(8, DUK_ASC_UC_U, DUK_ASC_PLUS);
- }
- }
-
- *q++ = (duk_uint8_t) ((tmp >> 8) & 0xff);
- *q++ = (duk_uint8_t) (tmp & 0xff);
-
- tmp = tmp >> 16;
- while (tmp > 0) {
- tmp--;
- dig = (duk_small_uint_t) ((cp >> (4 * tmp)) & 0x0f);
- *q++ = duk_lc_digits[dig];
- }
-
- return q;
-}
-
-DUK_LOCAL void duk__enc_key_autoquote(duk_json_enc_ctx *js_ctx, duk_hstring *k) {
- const duk_int8_t *p, *p_start, *p_end; /* Note: intentionally signed. */
- duk_size_t k_len;
- duk_codepoint_t cp;
-
- DUK_ASSERT(k != NULL);
-
- /* Accept ASCII strings which conform to identifier requirements
- * as being emitted without key quotes. Since we only accept ASCII
- * there's no need for actual decoding: 'p' is intentionally signed
- * so that bytes >= 0x80 extend to negative values and are rejected
- * as invalid identifier codepoints.
- */
-
- if (js_ctx->flag_avoid_key_quotes) {
- k_len = DUK_HSTRING_GET_BYTELEN(k);
- p_start = (const duk_int8_t *) DUK_HSTRING_GET_DATA(k);
- p_end = p_start + k_len;
- p = p_start;
-
- if (p == p_end) {
- /* Zero length string is not accepted without quotes */
- goto quote_normally;
- }
- cp = (duk_codepoint_t) (*p++);
- if (DUK_UNLIKELY(!duk_unicode_is_identifier_start(cp))) {
- goto quote_normally;
- }
- while (p < p_end) {
- cp = (duk_codepoint_t) (*p++);
- if (DUK_UNLIKELY(!duk_unicode_is_identifier_part(cp))) {
- goto quote_normally;
- }
- }
-
- /* This seems faster than emitting bytes one at a time and
- * then potentially rewinding.
- */
- DUK__EMIT_HSTR(js_ctx, k);
- return;
- }
-
- quote_normally:
- duk__enc_quote_string(js_ctx, k);
-}
-
-/* The Quote(value) operation: quote a string.
- *
- * Stack policy: [ ] -> [ ].
- */
-
-DUK_LOCAL void duk__enc_quote_string(duk_json_enc_ctx *js_ctx, duk_hstring *h_str) {
- duk_hthread *thr = js_ctx->thr;
- const duk_uint8_t *p, *p_start, *p_end, *p_now, *p_tmp;
- duk_uint8_t *q;
- duk_ucodepoint_t cp; /* typed for duk_unicode_decode_xutf8() */
-
- DUK_DDD(DUK_DDDPRINT("duk__enc_quote_string: h_str=%!O", (duk_heaphdr *) h_str));
-
- DUK_ASSERT(h_str != NULL);
- p_start = DUK_HSTRING_GET_DATA(h_str);
- p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_str);
- p = p_start;
-
- DUK__EMIT_1(js_ctx, DUK_ASC_DOUBLEQUOTE);
-
- /* Encode string in small chunks, estimating the maximum expansion so that
- * there's no need to ensure space while processing the chunk.
- */
-
- while (p < p_end) {
- duk_size_t left, now, space;
-
- left = (duk_size_t) (p_end - p);
- now = (left > DUK__JSON_ENCSTR_CHUNKSIZE ?
- DUK__JSON_ENCSTR_CHUNKSIZE : left);
-
- /* Maximum expansion per input byte is 6:
- * - invalid UTF-8 byte causes "\uXXXX" to be emitted (6/1 = 6).
- * - 2-byte UTF-8 encodes as "\uXXXX" (6/2 = 3).
- * - 4-byte UTF-8 encodes as "\Uxxxxxxxx" (10/4 = 2.5).
- */
- space = now * 6;
- q = DUK_BW_ENSURE_GETPTR(thr, &js_ctx->bw, space);
-
- p_now = p + now;
-
- while (p < p_now) {
-#if defined(DUK_USE_JSON_QUOTESTRING_FASTPATH)
- duk_uint8_t b;
-
- b = duk__json_quotestr_lookup[*p++];
- if (DUK_LIKELY(b < 0x80)) {
- /* Most input bytes go through here. */
- *q++ = b;
- } else if (b >= 0xa0) {
- *q++ = DUK_ASC_BACKSLASH;
- *q++ = (duk_uint8_t) (b - 0x80);
- } else if (b == 0x80) {
- cp = (duk_ucodepoint_t) (*(p - 1));
- q = duk__emit_esc_auto_fast(js_ctx, cp, q);
- } else if (b == 0x7f && js_ctx->flag_ascii_only) {
- /* 0x7F is special */
- DUK_ASSERT(b == 0x81);
- cp = (duk_ucodepoint_t) 0x7f;
- q = duk__emit_esc_auto_fast(js_ctx, cp, q);
- } else {
- DUK_ASSERT(b == 0x81);
- p--;
-
- /* slow path is shared */
-#else /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
- cp = *p;
-
- if (DUK_LIKELY(cp <= 0x7f)) {
- /* ascii fast path: avoid decoding utf-8 */
- p++;
- if (cp == 0x22 || cp == 0x5c) {
- /* double quote or backslash */
- *q++ = DUK_ASC_BACKSLASH;
- *q++ = (duk_uint8_t) cp;
- } else if (cp < 0x20) {
- duk_uint_fast8_t esc_char;
-
- /* This approach is a bit shorter than a straight
- * if-else-ladder and also a bit faster.
- */
- if (cp < (sizeof(duk__json_quotestr_esc) / sizeof(duk_uint8_t)) &&
- (esc_char = duk__json_quotestr_esc[cp]) != 0) {
- *q++ = DUK_ASC_BACKSLASH;
- *q++ = (duk_uint8_t) esc_char;
- } else {
- q = duk__emit_esc_auto_fast(js_ctx, cp, q);
- }
- } else if (cp == 0x7f && js_ctx->flag_ascii_only) {
- q = duk__emit_esc_auto_fast(js_ctx, cp, q);
- } else {
- /* any other printable -> as is */
- *q++ = (duk_uint8_t) cp;
- }
- } else {
- /* slow path is shared */
-#endif /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
-
- /* slow path decode */
-
- /* If XUTF-8 decoding fails, treat the offending byte as a codepoint directly
- * and go forward one byte. This is of course very lossy, but allows some kind
- * of output to be produced even for internal strings which don't conform to
- * XUTF-8. All standard Ecmascript strings are always CESU-8, so this behavior
- * does not violate the Ecmascript specification. The behavior is applied to
- * all modes, including Ecmascript standard JSON. Because the current XUTF-8
- * decoding is not very strict, this behavior only really affects initial bytes
- * and truncated codepoints.
- *
- * Another alternative would be to scan forwards to start of next codepoint
- * (or end of input) and emit just one replacement codepoint.
- */
-
- p_tmp = p;
- if (!duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp)) {
- /* Decode failed. */
- cp = *p_tmp;
- p = p_tmp + 1;
- }
-
-#ifdef DUK_USE_NONSTD_JSON_ESC_U2028_U2029
- if (js_ctx->flag_ascii_only || cp == 0x2028 || cp == 0x2029) {
-#else
- if (js_ctx->flag_ascii_only) {
-#endif
- q = duk__emit_esc_auto_fast(js_ctx, cp, q);
- } else {
- /* as is */
- DUK_RAW_WRITE_XUTF8(q, cp);
- }
- }
- }
-
- DUK_BW_SET_PTR(thr, &js_ctx->bw, q);
- }
-
- DUK__EMIT_1(js_ctx, DUK_ASC_DOUBLEQUOTE);
-}
-
-/* Encode a double (checked by caller) from stack top. Stack top may be
- * replaced by serialized string but is not popped (caller does that).
- */
-DUK_LOCAL void duk__enc_double(duk_json_enc_ctx *js_ctx) {
- duk_hthread *thr;
- duk_context *ctx;
- duk_tval *tv;
- duk_double_t d;
- duk_small_int_t c;
- duk_small_int_t s;
- duk_small_uint_t stridx;
- duk_small_uint_t n2s_flags;
- duk_hstring *h_str;
-
- DUK_ASSERT(js_ctx != NULL);
- thr = js_ctx->thr;
- DUK_ASSERT(thr != NULL);
- ctx = (duk_context *) thr;
-
- /* Caller must ensure 'tv' is indeed a double and not a fastint! */
- tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
- DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv));
- d = DUK_TVAL_GET_DOUBLE(tv);
-
- c = (duk_small_int_t) DUK_FPCLASSIFY(d);
- s = (duk_small_int_t) DUK_SIGNBIT(d);
- DUK_UNREF(s);
-
- if (DUK_LIKELY(!(c == DUK_FP_INFINITE || c == DUK_FP_NAN))) {
- DUK_ASSERT(DUK_ISFINITE(d));
-
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- /* Negative zero needs special handling in JX/JC because
- * it would otherwise serialize to '0', not '-0'.
- */
- if (DUK_UNLIKELY(c == DUK_FP_ZERO && s != 0 &&
- (js_ctx->flag_ext_custom_or_compatible))) {
- duk_push_hstring_stridx(ctx, DUK_STRIDX_MINUS_ZERO); /* '-0' */
- } else
-#endif /* DUK_USE_JX || DUK_USE_JC */
- {
- n2s_flags = 0;
- /* [ ... number ] -> [ ... string ] */
- duk_numconv_stringify(ctx, 10 /*radix*/, 0 /*digits*/, n2s_flags);
- }
- h_str = duk_to_hstring(ctx, -1);
- DUK_ASSERT(h_str != NULL);
- DUK__EMIT_HSTR(js_ctx, h_str);
- return;
- }
-
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- if (!(js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM |
- DUK_JSON_FLAG_EXT_COMPATIBLE))) {
- stridx = DUK_STRIDX_LC_NULL;
- } else if (c == DUK_FP_NAN) {
- stridx = js_ctx->stridx_custom_nan;
- } else if (s == 0) {
- stridx = js_ctx->stridx_custom_posinf;
- } else {
- stridx = js_ctx->stridx_custom_neginf;
- }
-#else
- stridx = DUK_STRIDX_LC_NULL;
-#endif
- DUK__EMIT_STRIDX(js_ctx, stridx);
-}
-
-#if defined(DUK_USE_FASTINT)
-/* Encode a fastint from duk_tval ptr, no value stack effects. */
-DUK_LOCAL void duk__enc_fastint_tval(duk_json_enc_ctx *js_ctx, duk_tval *tv) {
- duk_int64_t v;
-
- /* Fastint range is signed 48-bit so longest value is -2^47 = -140737488355328
- * (16 chars long), longest signed 64-bit value is -2^63 = -9223372036854775808
- * (20 chars long). Alloc space for 64-bit range to be safe.
- */
- duk_uint8_t buf[20 + 1];
-
- /* Caller must ensure 'tv' is indeed a fastint! */
- DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv));
- v = DUK_TVAL_GET_FASTINT(tv);
-
- /* XXX: There are no format strings in duk_config.h yet, could add
- * one for formatting duk_int64_t. For now, assumes "%lld" and that
- * "long long" type exists. Could also rely on C99 directly but that
- * won't work for older MSVC.
- */
- DUK_SPRINTF((char *) buf, "%lld", (long long) v);
- DUK__EMIT_CSTR(js_ctx, (const char *) buf);
-}
-#endif
-
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
-#if defined(DUK_USE_HEX_FASTPATH)
-DUK_LOCAL duk_uint8_t *duk__enc_buffer_data_hex(const duk_uint8_t *src, duk_size_t src_len, duk_uint8_t *dst) {
- duk_uint8_t *q;
- duk_uint16_t *q16;
- duk_small_uint_t x;
- duk_size_t i, len_safe;
-#if !defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE)
- duk_bool_t shift_dst;
-#endif
-
- /* Unlike in duk_hex_encode() 'dst' is not necessarily aligned by 2.
- * For platforms where unaligned accesses are not allowed, shift 'dst'
- * ahead by 1 byte to get alignment and then DUK_MEMMOVE() the result
- * in place. The faster encoding loop makes up the difference.
- * There's always space for one extra byte because a terminator always
- * follows the hex data and that's been accounted for by the caller.
- */
-
-#if defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE)
- q16 = (duk_uint16_t *) (void *) dst;
-#else
- shift_dst = (duk_bool_t) (((duk_size_t) dst) & 0x01U);
- if (shift_dst) {
- DUK_DD(DUK_DDPRINT("unaligned accesses not possible, dst not aligned -> step to dst + 1"));
- q16 = (duk_uint16_t *) (void *) (dst + 1);
- } else {
- DUK_DD(DUK_DDPRINT("unaligned accesses not possible, dst is aligned"));
- q16 = (duk_uint16_t *) (void *) dst;
- }
- DUK_ASSERT((((duk_size_t) q16) & 0x01U) == 0);
-#endif
-
- len_safe = src_len & ~0x03U;
- for (i = 0; i < len_safe; i += 4) {
- q16[0] = duk_hex_enctab[src[i]];
- q16[1] = duk_hex_enctab[src[i + 1]];
- q16[2] = duk_hex_enctab[src[i + 2]];
- q16[3] = duk_hex_enctab[src[i + 3]];
- q16 += 4;
- }
- q = (duk_uint8_t *) q16;
-
-#if !defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE)
- if (shift_dst) {
- q--;
- DUK_MEMMOVE((void *) dst, (const void *) (dst + 1), 2 * len_safe);
- DUK_ASSERT(dst + 2 * len_safe == q);
- }
-#endif
-
- for (; i < src_len; i++) {
- x = src[i];
- *q++ = duk_lc_digits[x >> 4];
- *q++ = duk_lc_digits[x & 0x0f];
- }
-
- return q;
-}
-#else /* DUK_USE_HEX_FASTPATH */
-DUK_LOCAL duk_uint8_t *duk__enc_buffer_data_hex(const duk_uint8_t *src, duk_size_t src_len, duk_uint8_t *dst) {
- const duk_uint8_t *p;
- const duk_uint8_t *p_end;
- duk_uint8_t *q;
- duk_small_uint_t x;
-
- p = src;
- p_end = src + src_len;
- q = dst;
- while (p != p_end) {
- x = *p++;
- *q++ = duk_lc_digits[x >> 4];
- *q++ = duk_lc_digits[x & 0x0f];
- }
-
- return q;
-}
-#endif /* DUK_USE_HEX_FASTPATH */
-
-DUK_LOCAL void duk__enc_buffer_data(duk_json_enc_ctx *js_ctx, duk_uint8_t *buf_data, duk_size_t buf_len) {
- duk_hthread *thr;
- duk_uint8_t *q;
- duk_size_t space;
-
- thr = js_ctx->thr;
-
- DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); /* caller checks */
- DUK_ASSERT(js_ctx->flag_ext_custom_or_compatible);
-
- /* Buffer values are encoded in (lowercase) hex to make the
- * binary data readable. Base64 or similar would be more
- * compact but less readable, and the point of JX/JC
- * variants is to be as useful to a programmer as possible.
- */
-
- /* The #ifdef clutter here needs to handle the three cases:
- * (1) JX+JC, (2) JX only, (3) JC only.
- */
-
- /* Note: space must cater for both JX and JC. */
- space = 9 + buf_len * 2 + 2;
- DUK_ASSERT(DUK_HBUFFER_MAX_BYTELEN <= 0x7ffffffeUL);
- DUK_ASSERT((space - 2) / 2 >= buf_len); /* overflow not possible, buffer limits */
- q = DUK_BW_ENSURE_GETPTR(thr, &js_ctx->bw, space);
-
-#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
- if (js_ctx->flag_ext_custom)
-#endif
-#if defined(DUK_USE_JX)
- {
- *q++ = DUK_ASC_PIPE;
- q = duk__enc_buffer_data_hex(buf_data, buf_len, q);
- *q++ = DUK_ASC_PIPE;
-
- }
-#endif
-#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
- else
-#endif
-#if defined(DUK_USE_JC)
- {
- DUK_ASSERT(js_ctx->flag_ext_compatible);
- DUK_MEMCPY((void *) q, (const void *) "{\"_buf\":\"", 9); /* len: 9 */
- q += 9;
- q = duk__enc_buffer_data_hex(buf_data, buf_len, q);
- *q++ = DUK_ASC_DOUBLEQUOTE;
- *q++ = DUK_ASC_RCURLY;
- }
-#endif
-
- DUK_BW_SET_PTR(thr, &js_ctx->bw, q);
-}
-
-DUK_LOCAL void duk__enc_buffer(duk_json_enc_ctx *js_ctx, duk_hbuffer *h) {
- duk__enc_buffer_data(js_ctx,
- (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(js_ctx->thr->heap, h),
- (duk_size_t) DUK_HBUFFER_GET_SIZE(h));
-}
-#endif /* DUK_USE_JX || DUK_USE_JC */
-
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
-DUK_LOCAL void duk__enc_pointer(duk_json_enc_ctx *js_ctx, void *ptr) {
- char buf[64]; /* XXX: how to figure correct size? */
- const char *fmt;
-
- DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); /* caller checks */
- DUK_ASSERT(js_ctx->flag_ext_custom_or_compatible);
-
- DUK_MEMZERO(buf, sizeof(buf));
-
- /* The #ifdef clutter here needs to handle the three cases:
- * (1) JX+JC, (2) JX only, (3) JC only.
- */
-#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
- if (js_ctx->flag_ext_custom)
-#endif
-#if defined(DUK_USE_JX)
- {
- fmt = ptr ? "(%p)" : "(null)";
- }
-#endif
-#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
- else
-#endif
-#if defined(DUK_USE_JC)
- {
- DUK_ASSERT(js_ctx->flag_ext_compatible);
- fmt = ptr ? "{\"_ptr\":\"%p\"}" : "{\"_ptr\":\"null\"}";
- }
-#endif
-
- /* When ptr == NULL, the format argument is unused. */
- DUK_SNPRINTF(buf, sizeof(buf) - 1, fmt, ptr); /* must not truncate */
- DUK__EMIT_CSTR(js_ctx, buf);
-}
-#endif /* DUK_USE_JX || DUK_USE_JC */
-
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
-DUK_LOCAL void duk__enc_bufferobject(duk_json_enc_ctx *js_ctx, duk_hbufferobject *h_bufobj) {
- DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
-
- if (h_bufobj->buf == NULL || !DUK_HBUFFEROBJECT_VALID_SLICE(h_bufobj)) {
- DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
- } else {
- /* Handle both full and partial slice (as long as covered). */
- duk__enc_buffer_data(js_ctx,
- (duk_uint8_t *) DUK_HBUFFEROBJECT_GET_SLICE_BASE(js_ctx->thr->heap, h_bufobj),
- (duk_size_t) h_bufobj->length);
- }
-}
-#endif /* DUK_USE_JX || DUK_USE_JC */
-
-/* Indent helper. Calling code relies on js_ctx->recursion_depth also being
- * directly related to indent depth.
- */
-#if defined(DUK_USE_PREFER_SIZE)
-DUK_LOCAL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_int_t depth) {
- DUK_ASSERT(js_ctx->h_gap != NULL);
- DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) > 0); /* caller guarantees */
-
- DUK__EMIT_1(js_ctx, 0x0a);
- while (depth-- > 0) {
- DUK__EMIT_HSTR(js_ctx, js_ctx->h_gap);
- }
-}
-#else /* DUK_USE_PREFER_SIZE */
-DUK_LOCAL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_int_t depth) {
- const duk_uint8_t *gap_data;
- duk_size_t gap_len;
- duk_size_t avail_bytes; /* bytes of indent available for copying */
- duk_size_t need_bytes; /* bytes of indent still needed */
- duk_uint8_t *p_start;
- duk_uint8_t *p;
-
- DUK_ASSERT(js_ctx->h_gap != NULL);
- DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) > 0); /* caller guarantees */
-
- DUK__EMIT_1(js_ctx, 0x0a);
- if (DUK_UNLIKELY(depth == 0)) {
- return;
- }
-
- /* To handle deeper indents efficiently, make use of copies we've
- * already emitted. In effect we can emit a sequence of 1, 2, 4,
- * 8, etc copies, and then finish the last run. Byte counters
- * avoid multiply with gap_len on every loop.
- */
-
- gap_data = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(js_ctx->h_gap);
- gap_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap);
- DUK_ASSERT(gap_len > 0);
-
- need_bytes = gap_len * depth;
- p = DUK_BW_ENSURE_GETPTR(js_ctx->thr, &js_ctx->bw, need_bytes);
- p_start = p;
-
- DUK_MEMCPY((void *) p, (const void *) gap_data, (size_t) gap_len);
- p += gap_len;
- avail_bytes = gap_len;
- DUK_ASSERT(need_bytes >= gap_len);
- need_bytes -= gap_len;
-
- while (need_bytes >= avail_bytes) {
- DUK_MEMCPY((void *) p, (const void *) p_start, (size_t) avail_bytes);
- p += avail_bytes;
- need_bytes -= avail_bytes;
- avail_bytes <<= 1;
- }
-
- DUK_ASSERT(need_bytes < avail_bytes); /* need_bytes may be zero */
- DUK_MEMCPY((void *) p, (const void *) p_start, (size_t) need_bytes);
- p += need_bytes;
- /*avail_bytes += need_bytes*/
-
- DUK_BW_SET_PTR(js_ctx->thr, &js_ctx->bw, p);
-}
-#endif /* DUK_USE_PREFER_SIZE */
-
-/* Shared entry handling for object/array serialization. */
-DUK_LOCAL void duk__enc_objarr_entry(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_hobject *h_target;
- duk_uint_fast32_t i, n;
-
- *entry_top = duk_get_top(ctx);
-
- duk_require_stack(ctx, DUK_JSON_ENC_REQSTACK);
-
- /* Loop check using a hybrid approach: a fixed-size visited[] array
- * with overflow in a loop check object.
- */
-
- h_target = duk_get_hobject(ctx, -1); /* object or array */
- DUK_ASSERT(h_target != NULL);
-
- n = js_ctx->recursion_depth;
- if (DUK_UNLIKELY(n > DUK_JSON_ENC_LOOPARRAY)) {
- n = DUK_JSON_ENC_LOOPARRAY;
- }
- for (i = 0; i < n; i++) {
- if (DUK_UNLIKELY(js_ctx->visiting[i] == h_target)) {
- DUK_DD(DUK_DDPRINT("slow path loop detect"));
- DUK_ERROR_TYPE((duk_hthread *) ctx, DUK_STR_CYCLIC_INPUT);
- }
- }
- if (js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY) {
- js_ctx->visiting[js_ctx->recursion_depth] = h_target;
- } else {
- duk_push_sprintf(ctx, DUK_STR_FMT_PTR, (void *) h_target);
- duk_dup_top(ctx); /* -> [ ... voidp voidp ] */
- if (duk_has_prop(ctx, js_ctx->idx_loop)) {
- DUK_ERROR_TYPE((duk_hthread *) ctx, DUK_STR_CYCLIC_INPUT);
- }
- duk_push_true(ctx); /* -> [ ... voidp true ] */
- duk_put_prop(ctx, js_ctx->idx_loop); /* -> [ ... ] */
- }
-
- /* C recursion check. */
-
- DUK_ASSERT(js_ctx->recursion_depth >= 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- if (js_ctx->recursion_depth >= js_ctx->recursion_limit) {
- DUK_ERROR_RANGE((duk_hthread *) ctx, DUK_STR_JSONENC_RECLIMIT);
- }
- js_ctx->recursion_depth++;
-
- DUK_DDD(DUK_DDDPRINT("shared entry finished: top=%ld, loop=%!T",
- (long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, js_ctx->idx_loop)));
-}
-
-/* Shared exit handling for object/array serialization. */
-DUK_LOCAL void duk__enc_objarr_exit(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_hobject *h_target;
-
- /* C recursion check. */
-
- DUK_ASSERT(js_ctx->recursion_depth > 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- js_ctx->recursion_depth--;
-
- /* Loop check. */
-
- h_target = duk_get_hobject(ctx, *entry_top - 1); /* original target at entry_top - 1 */
- DUK_ASSERT(h_target != NULL);
-
- if (js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY) {
- /* Previous entry was inside visited[], nothing to do. */
- } else {
- duk_push_sprintf(ctx, DUK_STR_FMT_PTR, (void *) h_target);
- duk_del_prop(ctx, js_ctx->idx_loop); /* -> [ ... ] */
- }
-
- /* Restore stack top after unbalanced code paths. */
- duk_set_top(ctx, *entry_top);
-
- DUK_DDD(DUK_DDDPRINT("shared entry finished: top=%ld, loop=%!T",
- (long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, js_ctx->idx_loop)));
-}
-
-/* The JO(value) operation: encode object.
- *
- * Stack policy: [ object ] -> [ object ].
- */
-DUK_LOCAL void duk__enc_object(duk_json_enc_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_hstring *h_key;
- duk_idx_t entry_top;
- duk_idx_t idx_obj;
- duk_idx_t idx_keys;
- duk_bool_t emitted;
- duk_uarridx_t arr_len, i;
- duk_size_t prev_size;
-
- DUK_DDD(DUK_DDDPRINT("duk__enc_object: obj=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
-
- duk__enc_objarr_entry(js_ctx, &entry_top);
-
- idx_obj = entry_top - 1;
-
- if (js_ctx->idx_proplist >= 0) {
- idx_keys = js_ctx->idx_proplist;
- } else {
- /* XXX: would be nice to enumerate an object at specified index */
- duk_dup(ctx, idx_obj);
- (void) duk_hobject_get_enumerated_keys(ctx, DUK_ENUM_OWN_PROPERTIES_ONLY /*flags*/); /* [ ... target ] -> [ ... target keys ] */
- idx_keys = duk_require_normalize_index(ctx, -1);
- /* leave stack unbalanced on purpose */
- }
-
- DUK_DDD(DUK_DDDPRINT("idx_keys=%ld, h_keys=%!T",
- (long) idx_keys, (duk_tval *) duk_get_tval(ctx, idx_keys)));
-
- /* Steps 8-10 have been merged to avoid a "partial" variable. */
-
- DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY);
-
- /* XXX: keys is an internal object with all keys to be processed
- * in its (gapless) array part. Because nobody can touch the keys
- * object, we could iterate its array part directly (keeping in mind
- * that it can be reallocated).
- */
-
- arr_len = (duk_uarridx_t) duk_get_length(ctx, idx_keys);
- emitted = 0;
- for (i = 0; i < arr_len; i++) {
- duk_get_prop_index(ctx, idx_keys, i); /* -> [ ... key ] */
-
- DUK_DDD(DUK_DDDPRINT("object property loop: holder=%!T, key=%!T",
- (duk_tval *) duk_get_tval(ctx, idx_obj),
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- h_key = duk_get_hstring(ctx, -1);
- DUK_ASSERT(h_key != NULL);
-
- prev_size = DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw);
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
- duk__enc_key_autoquote(js_ctx, h_key);
- DUK__EMIT_2(js_ctx, DUK_ASC_COLON, DUK_ASC_SPACE);
- } else {
- duk__enc_key_autoquote(js_ctx, h_key);
- DUK__EMIT_1(js_ctx, DUK_ASC_COLON);
- }
-
- /* [ ... key ] */
-
- if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_obj) == 0)) {
- /* Value would yield 'undefined', so skip key altogether.
- * Side effects have already happened.
- */
- DUK_BW_SET_SIZE(js_ctx->thr, &js_ctx->bw, prev_size);
- } else {
- DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
- emitted = 1;
- }
-
- /* [ ... ] */
- }
-
- if (emitted) {
- DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
- DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- DUK_ASSERT(js_ctx->recursion_depth >= 1);
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
- }
- }
- DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY);
-
- duk__enc_objarr_exit(js_ctx, &entry_top);
-
- DUK_ASSERT_TOP(ctx, entry_top);
-}
-
-/* The JA(value) operation: encode array.
- *
- * Stack policy: [ array ] -> [ array ].
- */
-DUK_LOCAL void duk__enc_array(duk_json_enc_ctx *js_ctx) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_idx_t entry_top;
- duk_idx_t idx_arr;
- duk_bool_t emitted;
- duk_uarridx_t i, arr_len;
-
- DUK_DDD(DUK_DDDPRINT("duk__enc_array: array=%!T",
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- duk__enc_objarr_entry(js_ctx, &entry_top);
-
- idx_arr = entry_top - 1;
-
- /* Steps 8-10 have been merged to avoid a "partial" variable. */
-
- DUK__EMIT_1(js_ctx, DUK_ASC_LBRACKET);
-
- arr_len = (duk_uarridx_t) duk_get_length(ctx, idx_arr);
- emitted = 0;
- for (i = 0; i < arr_len; i++) {
- DUK_DDD(DUK_DDDPRINT("array entry loop: array=%!T, index=%ld, arr_len=%ld",
- (duk_tval *) duk_get_tval(ctx, idx_arr),
- (long) i, (long) arr_len));
-
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- DUK_ASSERT(js_ctx->recursion_depth >= 1);
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
- }
-
- /* XXX: duk_push_uint_string() */
- duk_push_uint(ctx, (duk_uint_t) i);
- duk_to_string(ctx, -1); /* -> [ ... key ] */
-
- /* [ ... key ] */
-
- if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_arr) == 0)) {
- /* Value would normally be omitted, replace with 'null'. */
- DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
- } else {
- ;
- }
-
- /* [ ... ] */
-
- DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
- emitted = 1;
- }
-
- if (emitted) {
- DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
- DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- DUK_ASSERT(js_ctx->recursion_depth >= 1);
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
- }
- }
- DUK__EMIT_1(js_ctx, DUK_ASC_RBRACKET);
-
- duk__enc_objarr_exit(js_ctx, &entry_top);
-
- DUK_ASSERT_TOP(ctx, entry_top);
-}
-
-/* The Str(key, holder) operation.
- *
- * Stack policy: [ ... key ] -> [ ... ]
- */
-DUK_LOCAL duk_bool_t duk__enc_value(duk_json_enc_ctx *js_ctx, duk_idx_t idx_holder) {
- duk_context *ctx = (duk_context *) js_ctx->thr;
- duk_hthread *thr = (duk_hthread *) ctx;
- duk_hobject *h_tmp;
- duk_tval *tv;
- duk_tval *tv_holder;
- duk_tval *tv_key;
- duk_small_int_t c;
-
- DUK_DDD(DUK_DDDPRINT("duk__enc_value: idx_holder=%ld, holder=%!T, key=%!T",
- (long) idx_holder, (duk_tval *) duk_get_tval(ctx, idx_holder),
- (duk_tval *) duk_get_tval(ctx, -1)));
-
- DUK_UNREF(thr);
-
- tv_holder = DUK_GET_TVAL_POSIDX(ctx, idx_holder);
- DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_holder));
- tv_key = DUK_GET_TVAL_NEGIDX(ctx, -1);
- DUK_ASSERT(DUK_TVAL_IS_STRING(tv_key));
- (void) duk_hobject_getprop(thr, tv_holder, tv_key);
-
- /* -> [ ... key val ] */
-
- DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
-
- h_tmp = duk_get_hobject_or_lfunc_coerce(ctx, -1);
- if (h_tmp != NULL) {
- duk_get_prop_stridx(ctx, -1, DUK_STRIDX_TO_JSON);
- h_tmp = duk_get_hobject_or_lfunc_coerce(ctx, -1); /* toJSON() can also be a lightfunc */
-
- if (h_tmp != NULL && DUK_HOBJECT_IS_CALLABLE(h_tmp)) {
- DUK_DDD(DUK_DDDPRINT("value is object, has callable toJSON() -> call it"));
- /* XXX: duk_dup_unvalidated(ctx, -2) etc. */
- duk_dup(ctx, -2); /* -> [ ... key val toJSON val ] */
- duk_dup(ctx, -4); /* -> [ ... key val toJSON val key ] */
- duk_call_method(ctx, 1); /* -> [ ... key val val' ] */
- duk_remove(ctx, -2); /* -> [ ... key val' ] */
- } else {
- duk_pop(ctx); /* -> [ ... key val ] */
- }
- }
-
- /* [ ... key val ] */
-
- DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
-
- if (js_ctx->h_replacer) {
- /* XXX: Here a "slice copy" would be useful. */
- DUK_DDD(DUK_DDDPRINT("replacer is set, call replacer"));
- duk_push_hobject(ctx, js_ctx->h_replacer); /* -> [ ... key val replacer ] */
- duk_dup(ctx, idx_holder); /* -> [ ... key val replacer holder ] */
- duk_dup(ctx, -4); /* -> [ ... key val replacer holder key ] */
- duk_dup(ctx, -4); /* -> [ ... key val replacer holder key val ] */
- duk_call_method(ctx, 2); /* -> [ ... key val val' ] */
- duk_remove(ctx, -2); /* -> [ ... key val' ] */
- }
-
- /* [ ... key val ] */
-
- DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
-
- tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
- if (DUK_TVAL_IS_OBJECT(tv)) {
- duk_hobject *h;
-
- h = DUK_TVAL_GET_OBJECT(tv);
- DUK_ASSERT(h != NULL);
-
- if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- duk_hbufferobject *h_bufobj;
- h_bufobj = (duk_hbufferobject *) h;
- DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
-
- /* Conceptually we'd extract the plain underlying buffer
- * or its slice and then do a type mask check below to
- * see if we should reject it. Do the mask check here
- * instead to avoid making a copy of the buffer slice.
- */
-
- if (js_ctx->mask_for_undefined & DUK_TYPE_MASK_BUFFER) {
- DUK_DDD(DUK_DDDPRINT("-> bufferobject (-> plain buffer) will result in undefined (type mask check)"));
- goto pop2_undef;
- }
- DUK_DDD(DUK_DDDPRINT("-> bufferobject won't result in undefined, encode directly"));
- duk__enc_bufferobject(js_ctx, h_bufobj);
- goto pop2_emitted;
-#else
- DUK_DDD(DUK_DDDPRINT("no JX/JC support, bufferobject/buffer will always result in undefined"));
- goto pop2_undef;
-#endif
- } else {
- c = (duk_small_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h);
- switch ((int) c) {
- case DUK_HOBJECT_CLASS_NUMBER: {
- DUK_DDD(DUK_DDDPRINT("value is a Number object -> coerce with ToNumber()"));
- duk_to_number(ctx, -1);
- /* The coercion potentially invokes user .valueOf() and .toString()
- * but can't result in a function value because [[DefaultValue]] would
- * reject such a result: test-dev-json-stringify-coercion-1.js.
- */
- DUK_ASSERT(!duk_is_callable(ctx, -1));
- break;
- }
- case DUK_HOBJECT_CLASS_STRING: {
- DUK_DDD(DUK_DDDPRINT("value is a String object -> coerce with ToString()"));
- duk_to_string(ctx, -1);
- /* Same coercion behavior as for Number. */
- DUK_ASSERT(!duk_is_callable(ctx, -1));
- break;
- }
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- case DUK_HOBJECT_CLASS_POINTER:
-#endif
- case DUK_HOBJECT_CLASS_BOOLEAN: {
- DUK_DDD(DUK_DDDPRINT("value is a Boolean/Buffer/Pointer object -> get internal value"));
- duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
- duk_remove(ctx, -2);
- break;
- }
- default: {
- /* Normal object which doesn't get automatically coerced to a
- * primitive value. Functions are checked for specially. The
- * primitive value coercions for Number, String, Pointer, and
- * Boolean can't result in functions so suffices to check here.
- */
- DUK_ASSERT(h != NULL);
- if (DUK_HOBJECT_IS_CALLABLE(h)) {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- if (js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM |
- DUK_JSON_FLAG_EXT_COMPATIBLE)) {
- /* We only get here when doing non-standard JSON encoding */
- DUK_DDD(DUK_DDDPRINT("-> function allowed, serialize to custom format"));
- DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible);
- DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function);
- goto pop2_emitted;
- } else {
- DUK_DDD(DUK_DDDPRINT("-> will result in undefined (function)"));
- goto pop2_undef;
- }
-#else /* DUK_USE_JX || DUK_USE_JC */
- DUK_DDD(DUK_DDDPRINT("-> will result in undefined (function)"));
- goto pop2_undef;
-#endif /* DUK_USE_JX || DUK_USE_JC */
- }
- }
- } /* end switch */
- }
- }
-
- /* [ ... key val ] */
-
- DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
-
- if (duk_check_type_mask(ctx, -1, js_ctx->mask_for_undefined)) {
- /* will result in undefined */
- DUK_DDD(DUK_DDDPRINT("-> will result in undefined (type mask check)"));
- goto pop2_undef;
- }
- tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
-
- switch (DUK_TVAL_GET_TAG(tv)) {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- /* When JX/JC not in use, the type mask above will avoid this case if needed. */
- case DUK_TAG_UNDEFINED: {
- DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined);
- break;
- }
-#endif
- case DUK_TAG_NULL: {
- DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
- break;
- }
- case DUK_TAG_BOOLEAN: {
- DUK__EMIT_STRIDX(js_ctx, DUK_TVAL_GET_BOOLEAN(tv) ?
- DUK_STRIDX_TRUE : DUK_STRIDX_FALSE);
- break;
- }
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- /* When JX/JC not in use, the type mask above will avoid this case if needed. */
- case DUK_TAG_POINTER: {
- duk__enc_pointer(js_ctx, DUK_TVAL_GET_POINTER(tv));
- break;
- }
-#endif /* DUK_USE_JX || DUK_USE_JC */
- case DUK_TAG_STRING: {
- duk_hstring *h = DUK_TVAL_GET_STRING(tv);
- DUK_ASSERT(h != NULL);
-
- duk__enc_quote_string(js_ctx, h);
- break;
- }
- case DUK_TAG_OBJECT: {
- duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
- DUK_ASSERT(h != NULL);
-
- /* Function values are handled completely above (including
- * coercion results):
- */
- DUK_ASSERT(!DUK_HOBJECT_IS_CALLABLE(h));
-
- if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) {
- duk__enc_array(js_ctx);
- } else {
- duk__enc_object(js_ctx);
- }
- break;
- }
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- /* When JX/JC not in use, the type mask above will avoid this case if needed. */
- case DUK_TAG_BUFFER: {
- duk__enc_buffer(js_ctx, DUK_TVAL_GET_BUFFER(tv));
- break;
- }
-#endif /* DUK_USE_JX || DUK_USE_JC */
- case DUK_TAG_LIGHTFUNC: {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- /* We only get here when doing non-standard JSON encoding */
- DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible);
- DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function);
-#else
- /* Standard JSON omits functions */
- DUK_UNREACHABLE();
-#endif
- break;
- }
-#if defined(DUK_USE_FASTINT)
- case DUK_TAG_FASTINT:
- /* Number serialization has a significant impact relative to
- * other fast path code, so careful fast path for fastints.
- */
- duk__enc_fastint_tval(js_ctx, tv);
- break;
-#endif
- default: {
- /* number */
- DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
- DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
- /* XXX: A fast path for usual integers would be useful when
- * fastint support is not enabled.
- */
- duk__enc_double(js_ctx);
- break;
- }
- }
-
- pop2_emitted:
- duk_pop_2(ctx); /* [ ... key val ] -> [ ... ] */
- return 1; /* emitted */
-
- pop2_undef:
- duk_pop_2(ctx); /* [ ... key val ] -> [ ... ] */
- return 0; /* not emitted */
-}
-
-/* E5 Section 15.12.3, main algorithm, step 4.b.ii steps 1-4. */
-DUK_LOCAL duk_bool_t duk__enc_allow_into_proplist(duk_tval *tv) {
- duk_hobject *h;
- duk_small_int_t c;
-
- DUK_ASSERT(tv != NULL);
- if (DUK_TVAL_IS_STRING(tv) || DUK_TVAL_IS_NUMBER(tv)) {
- return 1;
- } else if (DUK_TVAL_IS_OBJECT(tv)) {
- h = DUK_TVAL_GET_OBJECT(tv);
- DUK_ASSERT(h != NULL);
- c = (duk_small_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h);
- if (c == DUK_HOBJECT_CLASS_STRING || c == DUK_HOBJECT_CLASS_NUMBER) {
- return 1;
- }
- }
-
- return 0;
-}
-
-/*
- * JSON.stringify() fast path
- *
- * Otherwise supports full JSON, JX, and JC features, but bails out on any
- * possible side effect which might change the value being serialized. The
- * fast path can take advantage of the fact that the value being serialized
- * is unchanged so that we can walk directly through property tables etc.
- */
-
-#if defined(DUK_USE_JSON_STRINGIFY_FASTPATH)
-DUK_LOCAL duk_bool_t duk__json_stringify_fast_value(duk_json_enc_ctx *js_ctx, duk_tval *tv) {
- duk_uint_fast32_t i, n;
-
- DUK_DDD(DUK_DDDPRINT("stringify fast: %!T", tv));
-
- DUK_ASSERT(js_ctx != NULL);
- DUK_ASSERT(js_ctx->thr != NULL);
-
-#if 0 /* disabled for now */
- restart_match:
-#endif
-
- DUK_ASSERT(tv != NULL);
-
- switch (DUK_TVAL_GET_TAG(tv)) {
- case DUK_TAG_UNDEFINED: {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- if (js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible) {
- DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined);
- break;
- } else {
- goto emit_undefined;
- }
-#else
- goto emit_undefined;
-#endif
- }
- case DUK_TAG_NULL: {
- DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
- break;
- }
- case DUK_TAG_BOOLEAN: {
- DUK__EMIT_STRIDX(js_ctx, DUK_TVAL_GET_BOOLEAN(tv) ?
- DUK_STRIDX_TRUE : DUK_STRIDX_FALSE);
- break;
- }
- case DUK_TAG_STRING: {
- duk_hstring *h;
-
- h = DUK_TVAL_GET_STRING(tv);
- DUK_ASSERT(h != NULL);
- duk__enc_quote_string(js_ctx, h);
- break;
- }
- case DUK_TAG_OBJECT: {
- duk_hobject *obj;
- duk_tval *tv_val;
- duk_bool_t emitted = 0;
- duk_uint32_t c_bit, c_all, c_array, c_unbox, c_undef,
- c_func, c_bufobj, c_object;
-
- /* For objects JSON.stringify() only looks for own, enumerable
- * properties which is nice for the fast path here.
- *
- * For arrays JSON.stringify() uses [[Get]] so it will actually
- * inherit properties during serialization! This fast path
- * supports gappy arrays as long as there's no actual inherited
- * property (which might be a getter etc).
- *
- * Since recursion only happens for objects, we can have both
- * recursion and loop checks here. We use a simple, depth-limited
- * loop check in the fast path because the object-based tracking
- * is very slow (when tested, it accounted for 50% of fast path
- * execution time for input data with a lot of small objects!).
- */
-
- /* XXX: for real world code, could just ignore array inheritance
- * and only look at array own properties.
- */
-
- /* We rely on a few object flag / class number relationships here,
- * assert for them.
- */
-
- obj = DUK_TVAL_GET_OBJECT(tv);
- DUK_ASSERT(obj != NULL);
- DUK_ASSERT_HOBJECT_VALID(obj);
-
- /* Once recursion depth is increased, exit path must decrease
- * it (though it's OK to abort the fast path).
- */
-
- DUK_ASSERT(js_ctx->recursion_depth >= 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- if (js_ctx->recursion_depth >= js_ctx->recursion_limit) {
- DUK_DD(DUK_DDPRINT("fast path recursion limit"));
- DUK_ERROR_RANGE(js_ctx->thr, DUK_STR_JSONDEC_RECLIMIT);
- }
-
- for (i = 0, n = (duk_uint_fast32_t) js_ctx->recursion_depth; i < n; i++) {
- if (DUK_UNLIKELY(js_ctx->visiting[i] == obj)) {
- DUK_DD(DUK_DDPRINT("fast path loop detect"));
- DUK_ERROR_TYPE(js_ctx->thr, DUK_STR_CYCLIC_INPUT);
- }
- }
-
- /* Guaranteed by recursion_limit setup so we don't have to
- * check twice.
- */
- DUK_ASSERT(js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY);
- js_ctx->visiting[js_ctx->recursion_depth] = obj;
- js_ctx->recursion_depth++;
-
- /* If object has a .toJSON() property, we can't be certain
- * that it wouldn't mutate any value arbitrarily, so bail
- * out of the fast path.
- *
- * If an object is a Proxy we also can't avoid side effects
- * so abandon.
- */
- /* XXX: non-callable .toJSON() doesn't need to cause an abort
- * but does at the moment, probably not worth fixing.
- */
- if (duk_hobject_hasprop_raw(js_ctx->thr, obj, DUK_HTHREAD_STRING_TO_JSON(js_ctx->thr)) ||
- DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj)) {
- DUK_DD(DUK_DDPRINT("object has a .toJSON property or object is a Proxy, abort fast path"));
- goto abort_fastpath;
- }
-
- /* We could use a switch-case for the class number but it turns out
- * a small if-else ladder on class masks is better. The if-ladder
- * should be in order of relevancy.
- */
-
- /* XXX: move masks to js_ctx? they don't change during one
- * fast path invocation.
- */
- DUK_ASSERT(DUK_HOBJECT_CLASS_MAX <= 31);
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- if (js_ctx->flag_ext_custom_or_compatible) {
- c_all = DUK_HOBJECT_CMASK_ALL;
- c_array = DUK_HOBJECT_CMASK_ARRAY;
- c_unbox = DUK_HOBJECT_CMASK_NUMBER |
- DUK_HOBJECT_CMASK_STRING |
- DUK_HOBJECT_CMASK_BOOLEAN |
- DUK_HOBJECT_CMASK_POINTER;
- c_func = DUK_HOBJECT_CMASK_FUNCTION;
- c_bufobj = DUK_HOBJECT_CMASK_ALL_BUFFEROBJECTS;
- c_undef = 0;
- c_object = c_all & ~(c_array | c_unbox | c_func | c_bufobj | c_undef);
- }
- else
-#endif
- {
- c_all = DUK_HOBJECT_CMASK_ALL;
- c_array = DUK_HOBJECT_CMASK_ARRAY;
- c_unbox = DUK_HOBJECT_CMASK_NUMBER |
- DUK_HOBJECT_CMASK_STRING |
- DUK_HOBJECT_CMASK_BOOLEAN;
- c_func = 0;
- c_bufobj = 0;
- c_undef = DUK_HOBJECT_CMASK_FUNCTION |
- DUK_HOBJECT_CMASK_POINTER |
- DUK_HOBJECT_CMASK_ALL_BUFFEROBJECTS;
- c_object = c_all & ~(c_array | c_unbox | c_func | c_bufobj | c_undef);
- }
-
- c_bit = DUK_HOBJECT_GET_CLASS_MASK(obj);
- if (c_bit & c_object) {
- /* All other object types. */
- DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY);
-
- /* A non-Array object should not have an array part in practice.
- * But since it is supported internally (and perhaps used at some
- * point), check and abandon if that's the case.
- */
- if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
- DUK_DD(DUK_DDPRINT("non-Array object has array part, abort fast path"));
- goto abort_fastpath;
- }
-
- for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(obj); i++) {
- duk_hstring *k;
- duk_size_t prev_size;
-
- k = DUK_HOBJECT_E_GET_KEY(js_ctx->thr->heap, obj, i);
- if (!k) {
- continue;
- }
- if (!DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(js_ctx->thr->heap, obj, i)) {
- continue;
- }
- if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(js_ctx->thr->heap, obj, i)) {
- /* Getter might have arbitrary side effects,
- * so bail out.
- */
- DUK_DD(DUK_DDPRINT("property is an accessor, abort fast path"));
- goto abort_fastpath;
- }
- if (DUK_HSTRING_HAS_INTERNAL(k)) {
- continue;
- }
-
- tv_val = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(js_ctx->thr->heap, obj, i);
-
- prev_size = DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw);
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
- duk__enc_key_autoquote(js_ctx, k);
- DUK__EMIT_2(js_ctx, DUK_ASC_COLON, DUK_ASC_SPACE);
- } else {
- duk__enc_key_autoquote(js_ctx, k);
- DUK__EMIT_1(js_ctx, DUK_ASC_COLON);
- }
-
- if (duk__json_stringify_fast_value(js_ctx, tv_val) == 0) {
- DUK_DD(DUK_DDPRINT("prop value not supported, rewind key and colon"));
- DUK_BW_SET_SIZE(js_ctx->thr, &js_ctx->bw, prev_size);
- } else {
- DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
- emitted = 1;
- }
- }
-
- /* If any non-Array value had enumerable virtual own
- * properties, they should be serialized here. Standard
- * types don't.
- */
-
- if (emitted) {
- DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
- DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- DUK_ASSERT(js_ctx->recursion_depth >= 1);
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
- }
- }
- DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY);
- } else if (c_bit & c_array) {
- duk_uint_fast32_t arr_len;
- duk_uint_fast32_t asize;
-
- DUK__EMIT_1(js_ctx, DUK_ASC_LBRACKET);
-
- /* Assume arrays are dense in the fast path. */
- if (!DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
- DUK_DD(DUK_DDPRINT("Array object is sparse, abort fast path"));
- goto abort_fastpath;
- }
-
- arr_len = (duk_uint_fast32_t) duk_hobject_get_length(js_ctx->thr, obj);
- asize = (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(obj);
- if (arr_len > asize) {
- /* Array length is larger than 'asize'. This shouldn't
- * happen in practice. Bail out just in case.
- */
- DUK_DD(DUK_DDPRINT("arr_len > asize, abort fast path"));
- goto abort_fastpath;
- }
- /* Array part may be larger than 'length'; if so, iterate
- * only up to array 'length'.
- */
- for (i = 0; i < arr_len; i++) {
- DUK_ASSERT(i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(obj));
-
- tv_val = DUK_HOBJECT_A_GET_VALUE_PTR(js_ctx->thr->heap, obj, i);
-
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
- }
-
- if (DUK_UNLIKELY(DUK_TVAL_IS_UNUSED(tv_val))) {
- /* Gap in array; check for inherited property,
- * bail out if one exists. This should be enough
- * to support gappy arrays for all practical code.
- */
- duk_hstring *h_tmp;
- duk_bool_t has_inherited;
-
- /* XXX: refactor into an internal helper, pretty awkward */
- duk_push_uint((duk_context *) js_ctx->thr, (duk_uint_t) i);
- h_tmp = duk_to_hstring((duk_context *) js_ctx->thr, -1);
- DUK_ASSERT(h_tmp != NULL);
- has_inherited = duk_hobject_hasprop_raw(js_ctx->thr, obj, h_tmp);
- duk_pop((duk_context *) js_ctx->thr);
-
- if (has_inherited) {
- DUK_D(DUK_DPRINT("gap in array, conflicting inherited property, abort fast path"));
- goto abort_fastpath;
- }
-
- /* Ordinary gap, undefined encodes to 'null' in
- * standard JSON (and no JX/JC support here now).
- */
- DUK_D(DUK_DPRINT("gap in array, no conflicting inherited property, remain on fast path"));
-#if defined(DUK_USE_JX)
- DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined);
-#else
- DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
-#endif
- } else {
- if (duk__json_stringify_fast_value(js_ctx, tv_val) == 0) {
- DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
- }
- }
-
- DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
- emitted = 1;
- }
-
- if (emitted) {
- DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
- DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
- if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
- DUK_ASSERT(js_ctx->recursion_depth >= 1);
- duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
- }
- }
- DUK__EMIT_1(js_ctx, DUK_ASC_RBRACKET);
- } else if (c_bit & c_unbox) {
- /* Certain boxed types are required to go through
- * automatic unboxing. Rely on internal value being
- * sane (to avoid infinite recursion).
- */
-#if 1
- /* The code below is incorrect if .toString() or .valueOf() have
- * have been overridden. The correct approach would be to look up
- * the method(s) and if they resolve to the built-in function we
- * can safely bypass it and look up the internal value directly.
- * Unimplemented for now, abort fast path for boxed values.
- */
- goto abort_fastpath;
-#else /* disabled */
- /* Disabled until fixed, see above. */
- duk_tval *tv_internal;
-
- DUK_DD(DUK_DDPRINT("auto unboxing in fast path"));
-
- tv_internal = duk_hobject_get_internal_value_tval_ptr(js_ctx->thr->heap, obj);
- DUK_ASSERT(tv_internal != NULL);
- DUK_ASSERT(DUK_TVAL_IS_STRING(tv_internal) ||
- DUK_TVAL_IS_NUMBER(tv_internal) ||
- DUK_TVAL_IS_BOOLEAN(tv_internal) ||
- DUK_TVAL_IS_POINTER(tv_internal));
-
- tv = tv_internal;
- DUK_ASSERT(js_ctx->recursion_depth > 0);
- js_ctx->recursion_depth--; /* required to keep recursion depth correct */
- goto restart_match;
-#endif /* disabled */
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- } else if (c_bit & c_func) {
- DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function);
- } else if (c_bit & c_bufobj) {
- duk__enc_bufferobject(js_ctx, (duk_hbufferobject *) obj);
-#endif
- } else {
- DUK_ASSERT((c_bit & c_undef) != 0);
-
- /* Must decrease recursion depth before returning. */
- DUK_ASSERT(js_ctx->recursion_depth > 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- js_ctx->recursion_depth--;
- goto emit_undefined;
- }
-
- DUK_ASSERT(js_ctx->recursion_depth > 0);
- DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
- js_ctx->recursion_depth--;
- break;
- }
- case DUK_TAG_BUFFER: {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- if (js_ctx->flag_ext_custom_or_compatible) {
- duk__enc_buffer(js_ctx, DUK_TVAL_GET_BUFFER(tv));
- break;
- } else {
- goto emit_undefined;
- }
-#else
- goto emit_undefined;
-#endif
- }
- case DUK_TAG_POINTER: {
-#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
- if (js_ctx->flag_ext_custom_or_compatible) {
- duk__enc_pointer(js_ctx, DUK_TVAL_GET_POINTER(tv));
- break;
- } else {
- goto emit_undefined;
- }
-#else
- goto emit_undefined;
-#endif
- }
- case DUK_TAG_LIGHTFUNC: {
- /* A lightfunc might also inherit a .toJSON() so just bail out. */
- /* XXX: Could just lookup .toJSON() and continue in fast path,
- * as it would almost never be defined.
- */
- DUK_DD(DUK_DDPRINT("value is a lightfunc, abort fast path"));
- goto abort_fastpath;
- }
-#if defined(DUK_USE_FASTINT)
- case DUK_TAG_FASTINT: {
- /* Number serialization has a significant impact relative to
- * other fast path code, so careful fast path for fastints.
- */
- duk__enc_fastint_tval(js_ctx, tv);
- break;
- }
-#endif
- default: {
- /* XXX: A fast path for usual integers would be useful when
- * fastint support is not enabled.
- */
- DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
- DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
-
- /* XXX: Stack discipline is annoying, could be changed in numconv. */
- duk_push_tval((duk_context *) js_ctx->thr, tv);
- duk__enc_double(js_ctx);
- duk_pop((duk_context *) js_ctx->thr);
-
-#if 0
- /* Could also rely on native sprintf(), but it will handle
- * values like NaN, Infinity, -0, exponent notation etc in
- * a JSON-incompatible way.
- */
- duk_double_t d;
- char buf[64];
-
- DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv));
- d = DUK_TVAL_GET_DOUBLE(tv);
- DUK_SPRINTF(buf, "%lg", d);
- DUK__EMIT_CSTR(js_ctx, buf);
-#endif
- }
- }
- return 1; /* not undefined */
-
- emit_undefined:
- return 0; /* value was undefined/unsupported */
-
- abort_fastpath:
- /* Error message doesn't matter: the error is ignored anyway. */
-
<TRUNCATED>