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Posted to commits@trafficserver.apache.org by zw...@apache.org on 2015/07/23 13:14:19 UTC
[22/43] trafficserver git commit: TS-3783 TS-3030 Add luajit v2.0.4
as a subtree
http://git-wip-us.apache.org/repos/asf/trafficserver/blob/1f27b840/lib/luajit/src/lj_cparse.c
----------------------------------------------------------------------
diff --git a/lib/luajit/src/lj_cparse.c b/lib/luajit/src/lj_cparse.c
new file mode 100644
index 0000000..b9df88d
--- /dev/null
+++ b/lib/luajit/src/lj_cparse.c
@@ -0,0 +1,1872 @@
+/*
+** C declaration parser.
+** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#include "lj_obj.h"
+
+#if LJ_HASFFI
+
+#include "lj_gc.h"
+#include "lj_err.h"
+#include "lj_str.h"
+#include "lj_ctype.h"
+#include "lj_cparse.h"
+#include "lj_frame.h"
+#include "lj_vm.h"
+#include "lj_char.h"
+#include "lj_strscan.h"
+
+/*
+** Important note: this is NOT a validating C parser! This is a minimal
+** C declaration parser, solely for use by the LuaJIT FFI.
+**
+** It ought to return correct results for properly formed C declarations,
+** but it may accept some invalid declarations, too (and return nonsense).
+** Also, it shows rather generic error messages to avoid unnecessary bloat.
+** If in doubt, please check the input against your favorite C compiler.
+*/
+
+/* -- C lexer ------------------------------------------------------------- */
+
+/* C lexer token names. */
+static const char *const ctoknames[] = {
+#define CTOKSTR(name, str) str,
+CTOKDEF(CTOKSTR)
+#undef CTOKSTR
+ NULL
+};
+
+/* Forward declaration. */
+LJ_NORET static void cp_err(CPState *cp, ErrMsg em);
+
+static const char *cp_tok2str(CPState *cp, CPToken tok)
+{
+ lua_assert(tok < CTOK_FIRSTDECL);
+ if (tok > CTOK_OFS)
+ return ctoknames[tok-CTOK_OFS-1];
+ else if (!lj_char_iscntrl(tok))
+ return lj_str_pushf(cp->L, "%c", tok);
+ else
+ return lj_str_pushf(cp->L, "char(%d)", tok);
+}
+
+/* End-of-line? */
+static LJ_AINLINE int cp_iseol(CPChar c)
+{
+ return (c == '\n' || c == '\r');
+}
+
+/* Peek next raw character. */
+static LJ_AINLINE CPChar cp_rawpeek(CPState *cp)
+{
+ return (CPChar)(uint8_t)(*cp->p);
+}
+
+static LJ_NOINLINE CPChar cp_get_bs(CPState *cp);
+
+/* Get next character. */
+static LJ_AINLINE CPChar cp_get(CPState *cp)
+{
+ cp->c = (CPChar)(uint8_t)(*cp->p++);
+ if (LJ_LIKELY(cp->c != '\\')) return cp->c;
+ return cp_get_bs(cp);
+}
+
+/* Transparently skip backslash-escaped line breaks. */
+static LJ_NOINLINE CPChar cp_get_bs(CPState *cp)
+{
+ CPChar c2, c = cp_rawpeek(cp);
+ if (!cp_iseol(c)) return cp->c;
+ cp->p++;
+ c2 = cp_rawpeek(cp);
+ if (cp_iseol(c2) && c2 != c) cp->p++;
+ cp->linenumber++;
+ return cp_get(cp);
+}
+
+/* Grow save buffer. */
+static LJ_NOINLINE void cp_save_grow(CPState *cp, CPChar c)
+{
+ MSize newsize;
+ if (cp->sb.sz >= CPARSE_MAX_BUF/2)
+ cp_err(cp, LJ_ERR_XELEM);
+ newsize = cp->sb.sz * 2;
+ lj_str_resizebuf(cp->L, &cp->sb, newsize);
+ cp->sb.buf[cp->sb.n++] = (char)c;
+}
+
+/* Save character in buffer. */
+static LJ_AINLINE void cp_save(CPState *cp, CPChar c)
+{
+ if (LJ_UNLIKELY(cp->sb.n + 1 > cp->sb.sz))
+ cp_save_grow(cp, c);
+ else
+ cp->sb.buf[cp->sb.n++] = (char)c;
+}
+
+/* Skip line break. Handles "\n", "\r", "\r\n" or "\n\r". */
+static void cp_newline(CPState *cp)
+{
+ CPChar c = cp_rawpeek(cp);
+ if (cp_iseol(c) && c != cp->c) cp->p++;
+ cp->linenumber++;
+}
+
+LJ_NORET static void cp_errmsg(CPState *cp, CPToken tok, ErrMsg em, ...)
+{
+ const char *msg, *tokstr;
+ lua_State *L;
+ va_list argp;
+ if (tok == 0) {
+ tokstr = NULL;
+ } else if (tok == CTOK_IDENT || tok == CTOK_INTEGER || tok == CTOK_STRING ||
+ tok >= CTOK_FIRSTDECL) {
+ if (cp->sb.n == 0) cp_save(cp, '$');
+ cp_save(cp, '\0');
+ tokstr = cp->sb.buf;
+ } else {
+ tokstr = cp_tok2str(cp, tok);
+ }
+ L = cp->L;
+ va_start(argp, em);
+ msg = lj_str_pushvf(L, err2msg(em), argp);
+ va_end(argp);
+ if (tokstr)
+ msg = lj_str_pushf(L, err2msg(LJ_ERR_XNEAR), msg, tokstr);
+ if (cp->linenumber > 1)
+ msg = lj_str_pushf(L, "%s at line %d", msg, cp->linenumber);
+ lj_err_callermsg(L, msg);
+}
+
+LJ_NORET LJ_NOINLINE static void cp_err_token(CPState *cp, CPToken tok)
+{
+ cp_errmsg(cp, cp->tok, LJ_ERR_XTOKEN, cp_tok2str(cp, tok));
+}
+
+LJ_NORET LJ_NOINLINE static void cp_err_badidx(CPState *cp, CType *ct)
+{
+ GCstr *s = lj_ctype_repr(cp->cts->L, ctype_typeid(cp->cts, ct), NULL);
+ cp_errmsg(cp, 0, LJ_ERR_FFI_BADIDX, strdata(s));
+}
+
+LJ_NORET LJ_NOINLINE static void cp_err(CPState *cp, ErrMsg em)
+{
+ cp_errmsg(cp, 0, em);
+}
+
+/* -- Main lexical scanner ------------------------------------------------ */
+
+/* Parse number literal. Only handles int32_t/uint32_t right now. */
+static CPToken cp_number(CPState *cp)
+{
+ StrScanFmt fmt;
+ TValue o;
+ do { cp_save(cp, cp->c); } while (lj_char_isident(cp_get(cp)));
+ cp_save(cp, '\0');
+ fmt = lj_strscan_scan((const uint8_t *)cp->sb.buf, &o, STRSCAN_OPT_C);
+ if (fmt == STRSCAN_INT) cp->val.id = CTID_INT32;
+ else if (fmt == STRSCAN_U32) cp->val.id = CTID_UINT32;
+ else if (!(cp->mode & CPARSE_MODE_SKIP))
+ cp_errmsg(cp, CTOK_INTEGER, LJ_ERR_XNUMBER);
+ cp->val.u32 = (uint32_t)o.i;
+ return CTOK_INTEGER;
+}
+
+/* Parse identifier or keyword. */
+static CPToken cp_ident(CPState *cp)
+{
+ do { cp_save(cp, cp->c); } while (lj_char_isident(cp_get(cp)));
+ cp->str = lj_str_new(cp->L, cp->sb.buf, cp->sb.n);
+ cp->val.id = lj_ctype_getname(cp->cts, &cp->ct, cp->str, cp->tmask);
+ if (ctype_type(cp->ct->info) == CT_KW)
+ return ctype_cid(cp->ct->info);
+ return CTOK_IDENT;
+}
+
+/* Parse parameter. */
+static CPToken cp_param(CPState *cp)
+{
+ CPChar c = cp_get(cp);
+ TValue *o = cp->param;
+ if (lj_char_isident(c) || c == '$') /* Reserve $xyz for future extensions. */
+ cp_errmsg(cp, c, LJ_ERR_XSYNTAX);
+ if (!o || o >= cp->L->top)
+ cp_err(cp, LJ_ERR_FFI_NUMPARAM);
+ cp->param = o+1;
+ if (tvisstr(o)) {
+ cp->str = strV(o);
+ cp->val.id = 0;
+ cp->ct = &cp->cts->tab[0];
+ return CTOK_IDENT;
+ } else if (tvisnumber(o)) {
+ cp->val.i32 = numberVint(o);
+ cp->val.id = CTID_INT32;
+ return CTOK_INTEGER;
+ } else {
+ GCcdata *cd;
+ if (!tviscdata(o))
+ lj_err_argtype(cp->L, (int)(o-cp->L->base)+1, "type parameter");
+ cd = cdataV(o);
+ if (cd->ctypeid == CTID_CTYPEID)
+ cp->val.id = *(CTypeID *)cdataptr(cd);
+ else
+ cp->val.id = cd->ctypeid;
+ return '$';
+ }
+}
+
+/* Parse string or character constant. */
+static CPToken cp_string(CPState *cp)
+{
+ CPChar delim = cp->c;
+ cp_get(cp);
+ while (cp->c != delim) {
+ CPChar c = cp->c;
+ if (c == '\0') cp_errmsg(cp, CTOK_EOF, LJ_ERR_XSTR);
+ if (c == '\\') {
+ c = cp_get(cp);
+ switch (c) {
+ case '\0': cp_errmsg(cp, CTOK_EOF, LJ_ERR_XSTR); break;
+ case 'a': c = '\a'; break;
+ case 'b': c = '\b'; break;
+ case 'f': c = '\f'; break;
+ case 'n': c = '\n'; break;
+ case 'r': c = '\r'; break;
+ case 't': c = '\t'; break;
+ case 'v': c = '\v'; break;
+ case 'e': c = 27; break;
+ case 'x':
+ c = 0;
+ while (lj_char_isxdigit(cp_get(cp)))
+ c = (c<<4) + (lj_char_isdigit(cp->c) ? cp->c-'0' : (cp->c&15)+9);
+ cp_save(cp, (c & 0xff));
+ continue;
+ default:
+ if (lj_char_isdigit(c)) {
+ c -= '0';
+ if (lj_char_isdigit(cp_get(cp))) {
+ c = c*8 + (cp->c - '0');
+ if (lj_char_isdigit(cp_get(cp))) {
+ c = c*8 + (cp->c - '0');
+ cp_get(cp);
+ }
+ }
+ cp_save(cp, (c & 0xff));
+ continue;
+ }
+ break;
+ }
+ }
+ cp_save(cp, c);
+ cp_get(cp);
+ }
+ cp_get(cp);
+ if (delim == '"') {
+ cp->str = lj_str_new(cp->L, cp->sb.buf, cp->sb.n);
+ return CTOK_STRING;
+ } else {
+ if (cp->sb.n != 1) cp_err_token(cp, '\'');
+ cp->val.i32 = (int32_t)(char)cp->sb.buf[0];
+ cp->val.id = CTID_INT32;
+ return CTOK_INTEGER;
+ }
+}
+
+/* Skip C comment. */
+static void cp_comment_c(CPState *cp)
+{
+ do {
+ if (cp_get(cp) == '*') {
+ do {
+ if (cp_get(cp) == '/') { cp_get(cp); return; }
+ } while (cp->c == '*');
+ }
+ if (cp_iseol(cp->c)) cp_newline(cp);
+ } while (cp->c != '\0');
+}
+
+/* Skip C++ comment. */
+static void cp_comment_cpp(CPState *cp)
+{
+ while (!cp_iseol(cp_get(cp)) && cp->c != '\0')
+ ;
+}
+
+/* Lexical scanner for C. Only a minimal subset is implemented. */
+static CPToken cp_next_(CPState *cp)
+{
+ lj_str_resetbuf(&cp->sb);
+ for (;;) {
+ if (lj_char_isident(cp->c))
+ return lj_char_isdigit(cp->c) ? cp_number(cp) : cp_ident(cp);
+ switch (cp->c) {
+ case '\n': case '\r': cp_newline(cp); /* fallthrough. */
+ case ' ': case '\t': case '\v': case '\f': cp_get(cp); break;
+ case '"': case '\'': return cp_string(cp);
+ case '/':
+ if (cp_get(cp) == '*') cp_comment_c(cp);
+ else if (cp->c == '/') cp_comment_cpp(cp);
+ else return '/';
+ break;
+ case '|':
+ if (cp_get(cp) != '|') return '|'; cp_get(cp); return CTOK_OROR;
+ case '&':
+ if (cp_get(cp) != '&') return '&'; cp_get(cp); return CTOK_ANDAND;
+ case '=':
+ if (cp_get(cp) != '=') return '='; cp_get(cp); return CTOK_EQ;
+ case '!':
+ if (cp_get(cp) != '=') return '!'; cp_get(cp); return CTOK_NE;
+ case '<':
+ if (cp_get(cp) == '=') { cp_get(cp); return CTOK_LE; }
+ else if (cp->c == '<') { cp_get(cp); return CTOK_SHL; }
+ return '<';
+ case '>':
+ if (cp_get(cp) == '=') { cp_get(cp); return CTOK_GE; }
+ else if (cp->c == '>') { cp_get(cp); return CTOK_SHR; }
+ return '>';
+ case '-':
+ if (cp_get(cp) != '>') return '-'; cp_get(cp); return CTOK_DEREF;
+ case '$':
+ return cp_param(cp);
+ case '\0': return CTOK_EOF;
+ default: { CPToken c = cp->c; cp_get(cp); return c; }
+ }
+ }
+}
+
+static LJ_NOINLINE CPToken cp_next(CPState *cp)
+{
+ return (cp->tok = cp_next_(cp));
+}
+
+/* -- C parser ------------------------------------------------------------ */
+
+/* Namespaces for resolving identifiers. */
+#define CPNS_DEFAULT \
+ ((1u<<CT_KW)|(1u<<CT_TYPEDEF)|(1u<<CT_FUNC)|(1u<<CT_EXTERN)|(1u<<CT_CONSTVAL))
+#define CPNS_STRUCT ((1u<<CT_KW)|(1u<<CT_STRUCT)|(1u<<CT_ENUM))
+
+typedef CTypeID CPDeclIdx; /* Index into declaration stack. */
+typedef uint32_t CPscl; /* Storage class flags. */
+
+/* Type declaration context. */
+typedef struct CPDecl {
+ CPDeclIdx top; /* Top of declaration stack. */
+ CPDeclIdx pos; /* Insertion position in declaration chain. */
+ CPDeclIdx specpos; /* Saved position for declaration specifier. */
+ uint32_t mode; /* Declarator mode. */
+ CPState *cp; /* C parser state. */
+ GCstr *name; /* Name of declared identifier (if direct). */
+ GCstr *redir; /* Redirected symbol name. */
+ CTypeID nameid; /* Existing typedef for declared identifier. */
+ CTInfo attr; /* Attributes. */
+ CTInfo fattr; /* Function attributes. */
+ CTInfo specattr; /* Saved attributes. */
+ CTInfo specfattr; /* Saved function attributes. */
+ CTSize bits; /* Field size in bits (if any). */
+ CType stack[CPARSE_MAX_DECLSTACK]; /* Type declaration stack. */
+} CPDecl;
+
+/* Forward declarations. */
+static CPscl cp_decl_spec(CPState *cp, CPDecl *decl, CPscl scl);
+static void cp_declarator(CPState *cp, CPDecl *decl);
+static CTypeID cp_decl_abstract(CPState *cp);
+
+/* Initialize C parser state. Caller must set up: L, p, srcname, mode. */
+static void cp_init(CPState *cp)
+{
+ cp->linenumber = 1;
+ cp->depth = 0;
+ cp->curpack = 0;
+ cp->packstack[0] = 255;
+ lj_str_initbuf(&cp->sb);
+ lj_str_resizebuf(cp->L, &cp->sb, LJ_MIN_SBUF);
+ lua_assert(cp->p != NULL);
+ cp_get(cp); /* Read-ahead first char. */
+ cp->tok = 0;
+ cp->tmask = CPNS_DEFAULT;
+ cp_next(cp); /* Read-ahead first token. */
+}
+
+/* Cleanup C parser state. */
+static void cp_cleanup(CPState *cp)
+{
+ global_State *g = G(cp->L);
+ lj_str_freebuf(g, &cp->sb);
+}
+
+/* Check and consume optional token. */
+static int cp_opt(CPState *cp, CPToken tok)
+{
+ if (cp->tok == tok) { cp_next(cp); return 1; }
+ return 0;
+}
+
+/* Check and consume token. */
+static void cp_check(CPState *cp, CPToken tok)
+{
+ if (cp->tok != tok) cp_err_token(cp, tok);
+ cp_next(cp);
+}
+
+/* Check if the next token may start a type declaration. */
+static int cp_istypedecl(CPState *cp)
+{
+ if (cp->tok >= CTOK_FIRSTDECL && cp->tok <= CTOK_LASTDECL) return 1;
+ if (cp->tok == CTOK_IDENT && ctype_istypedef(cp->ct->info)) return 1;
+ if (cp->tok == '$') return 1;
+ return 0;
+}
+
+/* -- Constant expression evaluator --------------------------------------- */
+
+/* Forward declarations. */
+static void cp_expr_unary(CPState *cp, CPValue *k);
+static void cp_expr_sub(CPState *cp, CPValue *k, int pri);
+
+/* Please note that type handling is very weak here. Most ops simply
+** assume integer operands. Accessors are only needed to compute types and
+** return synthetic values. The only purpose of the expression evaluator
+** is to compute the values of constant expressions one would typically
+** find in C header files. And again: this is NOT a validating C parser!
+*/
+
+/* Parse comma separated expression and return last result. */
+static void cp_expr_comma(CPState *cp, CPValue *k)
+{
+ do { cp_expr_sub(cp, k, 0); } while (cp_opt(cp, ','));
+}
+
+/* Parse sizeof/alignof operator. */
+static void cp_expr_sizeof(CPState *cp, CPValue *k, int wantsz)
+{
+ CTSize sz;
+ CTInfo info;
+ if (cp_opt(cp, '(')) {
+ if (cp_istypedecl(cp))
+ k->id = cp_decl_abstract(cp);
+ else
+ cp_expr_comma(cp, k);
+ cp_check(cp, ')');
+ } else {
+ cp_expr_unary(cp, k);
+ }
+ info = lj_ctype_info(cp->cts, k->id, &sz);
+ if (wantsz) {
+ if (sz != CTSIZE_INVALID)
+ k->u32 = sz;
+ else if (k->id != CTID_A_CCHAR) /* Special case for sizeof("string"). */
+ cp_err(cp, LJ_ERR_FFI_INVSIZE);
+ } else {
+ k->u32 = 1u << ctype_align(info);
+ }
+ k->id = CTID_UINT32; /* Really size_t. */
+}
+
+/* Parse prefix operators. */
+static void cp_expr_prefix(CPState *cp, CPValue *k)
+{
+ if (cp->tok == CTOK_INTEGER) {
+ *k = cp->val; cp_next(cp);
+ } else if (cp_opt(cp, '+')) {
+ cp_expr_unary(cp, k); /* Nothing to do (well, integer promotion). */
+ } else if (cp_opt(cp, '-')) {
+ cp_expr_unary(cp, k); k->i32 = -k->i32;
+ } else if (cp_opt(cp, '~')) {
+ cp_expr_unary(cp, k); k->i32 = ~k->i32;
+ } else if (cp_opt(cp, '!')) {
+ cp_expr_unary(cp, k); k->i32 = !k->i32; k->id = CTID_INT32;
+ } else if (cp_opt(cp, '(')) {
+ if (cp_istypedecl(cp)) { /* Cast operator. */
+ CTypeID id = cp_decl_abstract(cp);
+ cp_check(cp, ')');
+ cp_expr_unary(cp, k);
+ k->id = id; /* No conversion performed. */
+ } else { /* Sub-expression. */
+ cp_expr_comma(cp, k);
+ cp_check(cp, ')');
+ }
+ } else if (cp_opt(cp, '*')) { /* Indirection. */
+ CType *ct;
+ cp_expr_unary(cp, k);
+ ct = lj_ctype_rawref(cp->cts, k->id);
+ if (!ctype_ispointer(ct->info))
+ cp_err_badidx(cp, ct);
+ k->u32 = 0; k->id = ctype_cid(ct->info);
+ } else if (cp_opt(cp, '&')) { /* Address operator. */
+ cp_expr_unary(cp, k);
+ k->id = lj_ctype_intern(cp->cts, CTINFO(CT_PTR, CTALIGN_PTR+k->id),
+ CTSIZE_PTR);
+ } else if (cp_opt(cp, CTOK_SIZEOF)) {
+ cp_expr_sizeof(cp, k, 1);
+ } else if (cp_opt(cp, CTOK_ALIGNOF)) {
+ cp_expr_sizeof(cp, k, 0);
+ } else if (cp->tok == CTOK_IDENT) {
+ if (ctype_type(cp->ct->info) == CT_CONSTVAL) {
+ k->u32 = cp->ct->size; k->id = ctype_cid(cp->ct->info);
+ } else if (ctype_type(cp->ct->info) == CT_EXTERN) {
+ k->u32 = cp->val.id; k->id = ctype_cid(cp->ct->info);
+ } else if (ctype_type(cp->ct->info) == CT_FUNC) {
+ k->u32 = cp->val.id; k->id = cp->val.id;
+ } else {
+ goto err_expr;
+ }
+ cp_next(cp);
+ } else if (cp->tok == CTOK_STRING) {
+ CTSize sz = cp->str->len;
+ while (cp_next(cp) == CTOK_STRING)
+ sz += cp->str->len;
+ k->u32 = sz + 1;
+ k->id = CTID_A_CCHAR;
+ } else {
+ err_expr:
+ cp_errmsg(cp, cp->tok, LJ_ERR_XSYMBOL);
+ }
+}
+
+/* Parse postfix operators. */
+static void cp_expr_postfix(CPState *cp, CPValue *k)
+{
+ for (;;) {
+ CType *ct;
+ if (cp_opt(cp, '[')) { /* Array/pointer index. */
+ CPValue k2;
+ cp_expr_comma(cp, &k2);
+ ct = lj_ctype_rawref(cp->cts, k->id);
+ if (!ctype_ispointer(ct->info)) {
+ ct = lj_ctype_rawref(cp->cts, k2.id);
+ if (!ctype_ispointer(ct->info))
+ cp_err_badidx(cp, ct);
+ }
+ cp_check(cp, ']');
+ k->u32 = 0;
+ } else if (cp->tok == '.' || cp->tok == CTOK_DEREF) { /* Struct deref. */
+ CTSize ofs;
+ CType *fct;
+ ct = lj_ctype_rawref(cp->cts, k->id);
+ if (cp->tok == CTOK_DEREF) {
+ if (!ctype_ispointer(ct->info))
+ cp_err_badidx(cp, ct);
+ ct = lj_ctype_rawref(cp->cts, ctype_cid(ct->info));
+ }
+ cp_next(cp);
+ if (cp->tok != CTOK_IDENT) cp_err_token(cp, CTOK_IDENT);
+ if (!ctype_isstruct(ct->info) || ct->size == CTSIZE_INVALID ||
+ !(fct = lj_ctype_getfield(cp->cts, ct, cp->str, &ofs)) ||
+ ctype_isbitfield(fct->info)) {
+ GCstr *s = lj_ctype_repr(cp->cts->L, ctype_typeid(cp->cts, ct), NULL);
+ cp_errmsg(cp, 0, LJ_ERR_FFI_BADMEMBER, strdata(s), strdata(cp->str));
+ }
+ ct = fct;
+ k->u32 = ctype_isconstval(ct->info) ? ct->size : 0;
+ cp_next(cp);
+ } else {
+ return;
+ }
+ k->id = ctype_cid(ct->info);
+ }
+}
+
+/* Parse infix operators. */
+static void cp_expr_infix(CPState *cp, CPValue *k, int pri)
+{
+ CPValue k2;
+ k2.u32 = 0; k2.id = 0; /* Silence the compiler. */
+ for (;;) {
+ switch (pri) {
+ case 0:
+ if (cp_opt(cp, '?')) {
+ CPValue k3;
+ cp_expr_comma(cp, &k2); /* Right-associative. */
+ cp_check(cp, ':');
+ cp_expr_sub(cp, &k3, 0);
+ k->u32 = k->u32 ? k2.u32 : k3.u32;
+ k->id = k2.id > k3.id ? k2.id : k3.id;
+ continue;
+ }
+ case 1:
+ if (cp_opt(cp, CTOK_OROR)) {
+ cp_expr_sub(cp, &k2, 2); k->i32 = k->u32 || k2.u32; k->id = CTID_INT32;
+ continue;
+ }
+ case 2:
+ if (cp_opt(cp, CTOK_ANDAND)) {
+ cp_expr_sub(cp, &k2, 3); k->i32 = k->u32 && k2.u32; k->id = CTID_INT32;
+ continue;
+ }
+ case 3:
+ if (cp_opt(cp, '|')) {
+ cp_expr_sub(cp, &k2, 4); k->u32 = k->u32 | k2.u32; goto arith_result;
+ }
+ case 4:
+ if (cp_opt(cp, '^')) {
+ cp_expr_sub(cp, &k2, 5); k->u32 = k->u32 ^ k2.u32; goto arith_result;
+ }
+ case 5:
+ if (cp_opt(cp, '&')) {
+ cp_expr_sub(cp, &k2, 6); k->u32 = k->u32 & k2.u32; goto arith_result;
+ }
+ case 6:
+ if (cp_opt(cp, CTOK_EQ)) {
+ cp_expr_sub(cp, &k2, 7); k->i32 = k->u32 == k2.u32; k->id = CTID_INT32;
+ continue;
+ } else if (cp_opt(cp, CTOK_NE)) {
+ cp_expr_sub(cp, &k2, 7); k->i32 = k->u32 != k2.u32; k->id = CTID_INT32;
+ continue;
+ }
+ case 7:
+ if (cp_opt(cp, '<')) {
+ cp_expr_sub(cp, &k2, 8);
+ if (k->id == CTID_INT32 && k2.id == CTID_INT32)
+ k->i32 = k->i32 < k2.i32;
+ else
+ k->i32 = k->u32 < k2.u32;
+ k->id = CTID_INT32;
+ continue;
+ } else if (cp_opt(cp, '>')) {
+ cp_expr_sub(cp, &k2, 8);
+ if (k->id == CTID_INT32 && k2.id == CTID_INT32)
+ k->i32 = k->i32 > k2.i32;
+ else
+ k->i32 = k->u32 > k2.u32;
+ k->id = CTID_INT32;
+ continue;
+ } else if (cp_opt(cp, CTOK_LE)) {
+ cp_expr_sub(cp, &k2, 8);
+ if (k->id == CTID_INT32 && k2.id == CTID_INT32)
+ k->i32 = k->i32 <= k2.i32;
+ else
+ k->i32 = k->u32 <= k2.u32;
+ k->id = CTID_INT32;
+ continue;
+ } else if (cp_opt(cp, CTOK_GE)) {
+ cp_expr_sub(cp, &k2, 8);
+ if (k->id == CTID_INT32 && k2.id == CTID_INT32)
+ k->i32 = k->i32 >= k2.i32;
+ else
+ k->i32 = k->u32 >= k2.u32;
+ k->id = CTID_INT32;
+ continue;
+ }
+ case 8:
+ if (cp_opt(cp, CTOK_SHL)) {
+ cp_expr_sub(cp, &k2, 9); k->u32 = k->u32 << k2.u32;
+ continue;
+ } else if (cp_opt(cp, CTOK_SHR)) {
+ cp_expr_sub(cp, &k2, 9);
+ if (k->id == CTID_INT32)
+ k->i32 = k->i32 >> k2.i32;
+ else
+ k->u32 = k->u32 >> k2.u32;
+ continue;
+ }
+ case 9:
+ if (cp_opt(cp, '+')) {
+ cp_expr_sub(cp, &k2, 10); k->u32 = k->u32 + k2.u32;
+ arith_result:
+ if (k2.id > k->id) k->id = k2.id; /* Trivial promotion to unsigned. */
+ continue;
+ } else if (cp_opt(cp, '-')) {
+ cp_expr_sub(cp, &k2, 10); k->u32 = k->u32 - k2.u32; goto arith_result;
+ }
+ case 10:
+ if (cp_opt(cp, '*')) {
+ cp_expr_unary(cp, &k2); k->u32 = k->u32 * k2.u32; goto arith_result;
+ } else if (cp_opt(cp, '/')) {
+ cp_expr_unary(cp, &k2);
+ if (k2.id > k->id) k->id = k2.id; /* Trivial promotion to unsigned. */
+ if (k2.u32 == 0 ||
+ (k->id == CTID_INT32 && k->u32 == 0x80000000u && k2.i32 == -1))
+ cp_err(cp, LJ_ERR_BADVAL);
+ if (k->id == CTID_INT32)
+ k->i32 = k->i32 / k2.i32;
+ else
+ k->u32 = k->u32 / k2.u32;
+ continue;
+ } else if (cp_opt(cp, '%')) {
+ cp_expr_unary(cp, &k2);
+ if (k2.id > k->id) k->id = k2.id; /* Trivial promotion to unsigned. */
+ if (k2.u32 == 0 ||
+ (k->id == CTID_INT32 && k->u32 == 0x80000000u && k2.i32 == -1))
+ cp_err(cp, LJ_ERR_BADVAL);
+ if (k->id == CTID_INT32)
+ k->i32 = k->i32 % k2.i32;
+ else
+ k->u32 = k->u32 % k2.u32;
+ continue;
+ }
+ default:
+ return;
+ }
+ }
+}
+
+/* Parse and evaluate unary expression. */
+static void cp_expr_unary(CPState *cp, CPValue *k)
+{
+ if (++cp->depth > CPARSE_MAX_DECLDEPTH) cp_err(cp, LJ_ERR_XLEVELS);
+ cp_expr_prefix(cp, k);
+ cp_expr_postfix(cp, k);
+ cp->depth--;
+}
+
+/* Parse and evaluate sub-expression. */
+static void cp_expr_sub(CPState *cp, CPValue *k, int pri)
+{
+ cp_expr_unary(cp, k);
+ cp_expr_infix(cp, k, pri);
+}
+
+/* Parse constant integer expression. */
+static void cp_expr_kint(CPState *cp, CPValue *k)
+{
+ CType *ct;
+ cp_expr_sub(cp, k, 0);
+ ct = ctype_raw(cp->cts, k->id);
+ if (!ctype_isinteger(ct->info)) cp_err(cp, LJ_ERR_BADVAL);
+}
+
+/* Parse (non-negative) size expression. */
+static CTSize cp_expr_ksize(CPState *cp)
+{
+ CPValue k;
+ cp_expr_kint(cp, &k);
+ if (k.u32 >= 0x80000000u) cp_err(cp, LJ_ERR_FFI_INVSIZE);
+ return k.u32;
+}
+
+/* -- Type declaration stack management ----------------------------------- */
+
+/* Add declaration element behind the insertion position. */
+static CPDeclIdx cp_add(CPDecl *decl, CTInfo info, CTSize size)
+{
+ CPDeclIdx top = decl->top;
+ if (top >= CPARSE_MAX_DECLSTACK) cp_err(decl->cp, LJ_ERR_XLEVELS);
+ decl->stack[top].info = info;
+ decl->stack[top].size = size;
+ decl->stack[top].sib = 0;
+ setgcrefnull(decl->stack[top].name);
+ decl->stack[top].next = decl->stack[decl->pos].next;
+ decl->stack[decl->pos].next = (CTypeID1)top;
+ decl->top = top+1;
+ return top;
+}
+
+/* Push declaration element before the insertion position. */
+static CPDeclIdx cp_push(CPDecl *decl, CTInfo info, CTSize size)
+{
+ return (decl->pos = cp_add(decl, info, size));
+}
+
+/* Push or merge attributes. */
+static void cp_push_attributes(CPDecl *decl)
+{
+ CType *ct = &decl->stack[decl->pos];
+ if (ctype_isfunc(ct->info)) { /* Ok to modify in-place. */
+#if LJ_TARGET_X86
+ if ((decl->fattr & CTFP_CCONV))
+ ct->info = (ct->info & (CTMASK_NUM|CTF_VARARG|CTMASK_CID)) +
+ (decl->fattr & ~CTMASK_CID);
+#endif
+ } else {
+ if ((decl->attr & CTFP_ALIGNED) && !(decl->mode & CPARSE_MODE_FIELD))
+ cp_push(decl, CTINFO(CT_ATTRIB, CTATTRIB(CTA_ALIGN)),
+ ctype_align(decl->attr));
+ }
+}
+
+/* Push unrolled type to declaration stack and merge qualifiers. */
+static void cp_push_type(CPDecl *decl, CTypeID id)
+{
+ CType *ct = ctype_get(decl->cp->cts, id);
+ CTInfo info = ct->info;
+ CTSize size = ct->size;
+ switch (ctype_type(info)) {
+ case CT_STRUCT: case CT_ENUM:
+ cp_push(decl, CTINFO(CT_TYPEDEF, id), 0); /* Don't copy unique types. */
+ if ((decl->attr & CTF_QUAL)) { /* Push unmerged qualifiers. */
+ cp_push(decl, CTINFO(CT_ATTRIB, CTATTRIB(CTA_QUAL)),
+ (decl->attr & CTF_QUAL));
+ decl->attr &= ~CTF_QUAL;
+ }
+ break;
+ case CT_ATTRIB:
+ if (ctype_isxattrib(info, CTA_QUAL))
+ decl->attr &= ~size; /* Remove redundant qualifiers. */
+ cp_push_type(decl, ctype_cid(info)); /* Unroll. */
+ cp_push(decl, info & ~CTMASK_CID, size); /* Copy type. */
+ break;
+ case CT_ARRAY:
+ cp_push_type(decl, ctype_cid(info)); /* Unroll. */
+ cp_push(decl, info & ~CTMASK_CID, size); /* Copy type. */
+ decl->stack[decl->pos].sib = 1; /* Mark as already checked and sized. */
+ /* Note: this is not copied to the ct->sib in the C type table. */
+ break;
+ case CT_FUNC:
+ /* Copy type, link parameters (shared). */
+ decl->stack[cp_push(decl, info, size)].sib = ct->sib;
+ break;
+ default:
+ /* Copy type, merge common qualifiers. */
+ cp_push(decl, info|(decl->attr & CTF_QUAL), size);
+ decl->attr &= ~CTF_QUAL;
+ break;
+ }
+}
+
+/* Consume the declaration element chain and intern the C type. */
+static CTypeID cp_decl_intern(CPState *cp, CPDecl *decl)
+{
+ CTypeID id = 0;
+ CPDeclIdx idx = 0;
+ CTSize csize = CTSIZE_INVALID;
+ CTSize cinfo = 0;
+ do {
+ CType *ct = &decl->stack[idx];
+ CTInfo info = ct->info;
+ CTInfo size = ct->size;
+ /* The cid is already part of info for copies of pointers/functions. */
+ idx = ct->next;
+ if (ctype_istypedef(info)) {
+ lua_assert(id == 0);
+ id = ctype_cid(info);
+ /* Always refetch info/size, since struct/enum may have been completed. */
+ cinfo = ctype_get(cp->cts, id)->info;
+ csize = ctype_get(cp->cts, id)->size;
+ lua_assert(ctype_isstruct(cinfo) || ctype_isenum(cinfo));
+ } else if (ctype_isfunc(info)) { /* Intern function. */
+ CType *fct;
+ CTypeID fid;
+ CTypeID sib;
+ if (id) {
+ CType *refct = ctype_raw(cp->cts, id);
+ /* Reject function or refarray return types. */
+ if (ctype_isfunc(refct->info) || ctype_isrefarray(refct->info))
+ cp_err(cp, LJ_ERR_FFI_INVTYPE);
+ }
+ /* No intervening attributes allowed, skip forward. */
+ while (idx) {
+ CType *ctn = &decl->stack[idx];
+ if (!ctype_isattrib(ctn->info)) break;
+ idx = ctn->next; /* Skip attribute. */
+ }
+ sib = ct->sib; /* Next line may reallocate the C type table. */
+ fid = lj_ctype_new(cp->cts, &fct);
+ csize = CTSIZE_INVALID;
+ fct->info = cinfo = info + id;
+ fct->size = size;
+ fct->sib = sib;
+ id = fid;
+ } else if (ctype_isattrib(info)) {
+ if (ctype_isxattrib(info, CTA_QUAL))
+ cinfo |= size;
+ else if (ctype_isxattrib(info, CTA_ALIGN))
+ CTF_INSERT(cinfo, ALIGN, size);
+ id = lj_ctype_intern(cp->cts, info+id, size);
+ /* Inherit csize/cinfo from original type. */
+ } else {
+ if (ctype_isnum(info)) { /* Handle mode/vector-size attributes. */
+ lua_assert(id == 0);
+ if (!(info & CTF_BOOL)) {
+ CTSize msize = ctype_msizeP(decl->attr);
+ CTSize vsize = ctype_vsizeP(decl->attr);
+ if (msize && (!(info & CTF_FP) || (msize == 4 || msize == 8))) {
+ CTSize malign = lj_fls(msize);
+ if (malign > 4) malign = 4; /* Limit alignment. */
+ CTF_INSERT(info, ALIGN, malign);
+ size = msize; /* Override size via mode. */
+ }
+ if (vsize) { /* Vector size set? */
+ CTSize esize = lj_fls(size);
+ if (vsize >= esize) {
+ /* Intern the element type first. */
+ id = lj_ctype_intern(cp->cts, info, size);
+ /* Then create a vector (array) with vsize alignment. */
+ size = (1u << vsize);
+ if (vsize > 4) vsize = 4; /* Limit alignment. */
+ if (ctype_align(info) > vsize) vsize = ctype_align(info);
+ info = CTINFO(CT_ARRAY, (info & CTF_QUAL) + CTF_VECTOR +
+ CTALIGN(vsize));
+ }
+ }
+ }
+ } else if (ctype_isptr(info)) {
+ /* Reject pointer/ref to ref. */
+ if (id && ctype_isref(ctype_raw(cp->cts, id)->info))
+ cp_err(cp, LJ_ERR_FFI_INVTYPE);
+ if (ctype_isref(info)) {
+ info &= ~CTF_VOLATILE; /* Refs are always const, never volatile. */
+ /* No intervening attributes allowed, skip forward. */
+ while (idx) {
+ CType *ctn = &decl->stack[idx];
+ if (!ctype_isattrib(ctn->info)) break;
+ idx = ctn->next; /* Skip attribute. */
+ }
+ }
+ } else if (ctype_isarray(info)) { /* Check for valid array size etc. */
+ if (ct->sib == 0) { /* Only check/size arrays not copied by unroll. */
+ if (ctype_isref(cinfo)) /* Reject arrays of refs. */
+ cp_err(cp, LJ_ERR_FFI_INVTYPE);
+ /* Reject VLS or unknown-sized types. */
+ if (ctype_isvltype(cinfo) || csize == CTSIZE_INVALID)
+ cp_err(cp, LJ_ERR_FFI_INVSIZE);
+ /* a[] and a[?] keep their invalid size. */
+ if (size != CTSIZE_INVALID) {
+ uint64_t xsz = (uint64_t)size * csize;
+ if (xsz >= 0x80000000u) cp_err(cp, LJ_ERR_FFI_INVSIZE);
+ size = (CTSize)xsz;
+ }
+ }
+ if ((cinfo & CTF_ALIGN) > (info & CTF_ALIGN)) /* Find max. align. */
+ info = (info & ~CTF_ALIGN) | (cinfo & CTF_ALIGN);
+ info |= (cinfo & CTF_QUAL); /* Inherit qual. */
+ } else {
+ lua_assert(ctype_isvoid(info));
+ }
+ csize = size;
+ cinfo = info+id;
+ id = lj_ctype_intern(cp->cts, info+id, size);
+ }
+ } while (idx);
+ return id;
+}
+
+/* -- C declaration parser ------------------------------------------------ */
+
+#define H_(le, be) LJ_ENDIAN_SELECT(0x##le, 0x##be)
+
+/* Reset declaration state to declaration specifier. */
+static void cp_decl_reset(CPDecl *decl)
+{
+ decl->pos = decl->specpos;
+ decl->top = decl->specpos+1;
+ decl->stack[decl->specpos].next = 0;
+ decl->attr = decl->specattr;
+ decl->fattr = decl->specfattr;
+ decl->name = NULL;
+ decl->redir = NULL;
+}
+
+/* Parse constant initializer. */
+/* NYI: FP constants and strings as initializers. */
+static CTypeID cp_decl_constinit(CPState *cp, CType **ctp, CTypeID ctypeid)
+{
+ CType *ctt = ctype_get(cp->cts, ctypeid);
+ CTInfo info;
+ CTSize size;
+ CPValue k;
+ CTypeID constid;
+ while (ctype_isattrib(ctt->info)) { /* Skip attributes. */
+ ctypeid = ctype_cid(ctt->info); /* Update ID, too. */
+ ctt = ctype_get(cp->cts, ctypeid);
+ }
+ info = ctt->info;
+ size = ctt->size;
+ if (!ctype_isinteger(info) || !(info & CTF_CONST) || size > 4)
+ cp_err(cp, LJ_ERR_FFI_INVTYPE);
+ cp_check(cp, '=');
+ cp_expr_sub(cp, &k, 0);
+ constid = lj_ctype_new(cp->cts, ctp);
+ (*ctp)->info = CTINFO(CT_CONSTVAL, CTF_CONST|ctypeid);
+ k.u32 <<= 8*(4-size);
+ if ((info & CTF_UNSIGNED))
+ k.u32 >>= 8*(4-size);
+ else
+ k.u32 = (uint32_t)((int32_t)k.u32 >> 8*(4-size));
+ (*ctp)->size = k.u32;
+ return constid;
+}
+
+/* Parse size in parentheses as part of attribute. */
+static CTSize cp_decl_sizeattr(CPState *cp)
+{
+ CTSize sz;
+ uint32_t oldtmask = cp->tmask;
+ cp->tmask = CPNS_DEFAULT; /* Required for expression evaluator. */
+ cp_check(cp, '(');
+ sz = cp_expr_ksize(cp);
+ cp->tmask = oldtmask;
+ cp_check(cp, ')');
+ return sz;
+}
+
+/* Parse alignment attribute. */
+static void cp_decl_align(CPState *cp, CPDecl *decl)
+{
+ CTSize al = 4; /* Unspecified alignment is 16 bytes. */
+ if (cp->tok == '(') {
+ al = cp_decl_sizeattr(cp);
+ al = al ? lj_fls(al) : 0;
+ }
+ CTF_INSERT(decl->attr, ALIGN, al);
+ decl->attr |= CTFP_ALIGNED;
+}
+
+/* Parse GCC asm("name") redirect. */
+static void cp_decl_asm(CPState *cp, CPDecl *decl)
+{
+ UNUSED(decl);
+ cp_next(cp);
+ cp_check(cp, '(');
+ if (cp->tok == CTOK_STRING) {
+ GCstr *str = cp->str;
+ while (cp_next(cp) == CTOK_STRING) {
+ lj_str_pushf(cp->L, "%s%s", strdata(str), strdata(cp->str));
+ cp->L->top--;
+ str = strV(cp->L->top);
+ }
+ decl->redir = str;
+ }
+ cp_check(cp, ')');
+}
+
+/* Parse GCC __attribute__((mode(...))). */
+static void cp_decl_mode(CPState *cp, CPDecl *decl)
+{
+ cp_check(cp, '(');
+ if (cp->tok == CTOK_IDENT) {
+ const char *s = strdata(cp->str);
+ CTSize sz = 0, vlen = 0;
+ if (s[0] == '_' && s[1] == '_') s += 2;
+ if (*s == 'V') {
+ s++;
+ vlen = *s++ - '0';
+ if (*s >= '0' && *s <= '9')
+ vlen = vlen*10 + (*s++ - '0');
+ }
+ switch (*s++) {
+ case 'Q': sz = 1; break;
+ case 'H': sz = 2; break;
+ case 'S': sz = 4; break;
+ case 'D': sz = 8; break;
+ case 'T': sz = 16; break;
+ case 'O': sz = 32; break;
+ default: goto bad_size;
+ }
+ if (*s == 'I' || *s == 'F') {
+ CTF_INSERT(decl->attr, MSIZEP, sz);
+ if (vlen) CTF_INSERT(decl->attr, VSIZEP, lj_fls(vlen*sz));
+ }
+ bad_size:
+ cp_next(cp);
+ }
+ cp_check(cp, ')');
+}
+
+/* Parse GCC __attribute__((...)). */
+static void cp_decl_gccattribute(CPState *cp, CPDecl *decl)
+{
+ cp_next(cp);
+ cp_check(cp, '(');
+ cp_check(cp, '(');
+ while (cp->tok != ')') {
+ if (cp->tok == CTOK_IDENT) {
+ GCstr *attrstr = cp->str;
+ cp_next(cp);
+ switch (attrstr->hash) {
+ case H_(64a9208e,8ce14319): case H_(8e6331b2,95a282af): /* aligned */
+ cp_decl_align(cp, decl);
+ break;
+ case H_(42eb47de,f0ede26c): case H_(29f48a09,cf383e0c): /* packed */
+ decl->attr |= CTFP_PACKED;
+ break;
+ case H_(0a84eef6,8dfab04c): case H_(995cf92c,d5696591): /* mode */
+ cp_decl_mode(cp, decl);
+ break;
+ case H_(0ab31997,2d5213fa): case H_(bf875611,200e9990): /* vector_size */
+ {
+ CTSize vsize = cp_decl_sizeattr(cp);
+ if (vsize) CTF_INSERT(decl->attr, VSIZEP, lj_fls(vsize));
+ }
+ break;
+#if LJ_TARGET_X86
+ case H_(5ad22db8,c689b848): case H_(439150fa,65ea78cb): /* regparm */
+ CTF_INSERT(decl->fattr, REGPARM, cp_decl_sizeattr(cp));
+ decl->fattr |= CTFP_CCONV;
+ break;
+ case H_(18fc0b98,7ff4c074): case H_(4e62abed,0a747424): /* cdecl */
+ CTF_INSERT(decl->fattr, CCONV, CTCC_CDECL);
+ decl->fattr |= CTFP_CCONV;
+ break;
+ case H_(72b2e41b,494c5a44): case H_(f2356d59,f25fc9bd): /* thiscall */
+ CTF_INSERT(decl->fattr, CCONV, CTCC_THISCALL);
+ decl->fattr |= CTFP_CCONV;
+ break;
+ case H_(0d0ffc42,ab746f88): case H_(21c54ba1,7f0ca7e3): /* fastcall */
+ CTF_INSERT(decl->fattr, CCONV, CTCC_FASTCALL);
+ decl->fattr |= CTFP_CCONV;
+ break;
+ case H_(ef76b040,9412e06a): case H_(de56697b,c750e6e1): /* stdcall */
+ CTF_INSERT(decl->fattr, CCONV, CTCC_STDCALL);
+ decl->fattr |= CTFP_CCONV;
+ break;
+ case H_(ea78b622,f234bd8e): case H_(252ffb06,8d50f34b): /* sseregparm */
+ decl->fattr |= CTF_SSEREGPARM;
+ decl->fattr |= CTFP_CCONV;
+ break;
+#endif
+ default: /* Skip all other attributes. */
+ goto skip_attr;
+ }
+ } else if (cp->tok >= CTOK_FIRSTDECL) { /* For __attribute((const)) etc. */
+ cp_next(cp);
+ skip_attr:
+ if (cp_opt(cp, '(')) {
+ while (cp->tok != ')' && cp->tok != CTOK_EOF) cp_next(cp);
+ cp_check(cp, ')');
+ }
+ } else {
+ break;
+ }
+ if (!cp_opt(cp, ',')) break;
+ }
+ cp_check(cp, ')');
+ cp_check(cp, ')');
+}
+
+/* Parse MSVC __declspec(...). */
+static void cp_decl_msvcattribute(CPState *cp, CPDecl *decl)
+{
+ cp_next(cp);
+ cp_check(cp, '(');
+ while (cp->tok == CTOK_IDENT) {
+ GCstr *attrstr = cp->str;
+ cp_next(cp);
+ switch (attrstr->hash) {
+ case H_(bc2395fa,98f267f8): /* align */
+ cp_decl_align(cp, decl);
+ break;
+ default: /* Ignore all other attributes. */
+ if (cp_opt(cp, '(')) {
+ while (cp->tok != ')' && cp->tok != CTOK_EOF) cp_next(cp);
+ cp_check(cp, ')');
+ }
+ break;
+ }
+ }
+ cp_check(cp, ')');
+}
+
+/* Parse declaration attributes (and common qualifiers). */
+static void cp_decl_attributes(CPState *cp, CPDecl *decl)
+{
+ for (;;) {
+ switch (cp->tok) {
+ case CTOK_CONST: decl->attr |= CTF_CONST; break;
+ case CTOK_VOLATILE: decl->attr |= CTF_VOLATILE; break;
+ case CTOK_RESTRICT: break; /* Ignore. */
+ case CTOK_EXTENSION: break; /* Ignore. */
+ case CTOK_ATTRIBUTE: cp_decl_gccattribute(cp, decl); continue;
+ case CTOK_ASM: cp_decl_asm(cp, decl); continue;
+ case CTOK_DECLSPEC: cp_decl_msvcattribute(cp, decl); continue;
+ case CTOK_CCDECL:
+#if LJ_TARGET_X86
+ CTF_INSERT(decl->fattr, CCONV, cp->ct->size);
+ decl->fattr |= CTFP_CCONV;
+#endif
+ break;
+ case CTOK_PTRSZ:
+#if LJ_64
+ CTF_INSERT(decl->attr, MSIZEP, cp->ct->size);
+#endif
+ break;
+ default: return;
+ }
+ cp_next(cp);
+ }
+}
+
+/* Parse struct/union/enum name. */
+static CTypeID cp_struct_name(CPState *cp, CPDecl *sdecl, CTInfo info)
+{
+ CTypeID sid;
+ CType *ct;
+ cp->tmask = CPNS_STRUCT;
+ cp_next(cp);
+ cp_decl_attributes(cp, sdecl);
+ cp->tmask = CPNS_DEFAULT;
+ if (cp->tok != '{') {
+ if (cp->tok != CTOK_IDENT) cp_err_token(cp, CTOK_IDENT);
+ if (cp->val.id) { /* Name of existing struct/union/enum. */
+ sid = cp->val.id;
+ ct = cp->ct;
+ if ((ct->info ^ info) & (CTMASK_NUM|CTF_UNION)) /* Wrong type. */
+ cp_errmsg(cp, 0, LJ_ERR_FFI_REDEF, strdata(gco2str(gcref(ct->name))));
+ } else { /* Create named, incomplete struct/union/enum. */
+ if ((cp->mode & CPARSE_MODE_NOIMPLICIT))
+ cp_errmsg(cp, 0, LJ_ERR_FFI_BADTAG, strdata(cp->str));
+ sid = lj_ctype_new(cp->cts, &ct);
+ ct->info = info;
+ ct->size = CTSIZE_INVALID;
+ ctype_setname(ct, cp->str);
+ lj_ctype_addname(cp->cts, ct, sid);
+ }
+ cp_next(cp);
+ } else { /* Create anonymous, incomplete struct/union/enum. */
+ sid = lj_ctype_new(cp->cts, &ct);
+ ct->info = info;
+ ct->size = CTSIZE_INVALID;
+ }
+ if (cp->tok == '{') {
+ if (ct->size != CTSIZE_INVALID || ct->sib)
+ cp_errmsg(cp, 0, LJ_ERR_FFI_REDEF, strdata(gco2str(gcref(ct->name))));
+ ct->sib = 1; /* Indicate the type is currently being defined. */
+ }
+ return sid;
+}
+
+/* Determine field alignment. */
+static CTSize cp_field_align(CPState *cp, CType *ct, CTInfo info)
+{
+ CTSize align = ctype_align(info);
+ UNUSED(cp); UNUSED(ct);
+#if (LJ_TARGET_X86 && !LJ_ABI_WIN) || (LJ_TARGET_ARM && __APPLE__)
+ /* The SYSV i386 and iOS ABIs limit alignment of non-vector fields to 2^2. */
+ if (align > 2 && !(info & CTFP_ALIGNED)) {
+ if (ctype_isarray(info) && !(info & CTF_VECTOR)) {
+ do {
+ ct = ctype_rawchild(cp->cts, ct);
+ info = ct->info;
+ } while (ctype_isarray(info) && !(info & CTF_VECTOR));
+ }
+ if (ctype_isnum(info) || ctype_isenum(info))
+ align = 2;
+ }
+#endif
+ return align;
+}
+
+/* Layout struct/union fields. */
+static void cp_struct_layout(CPState *cp, CTypeID sid, CTInfo sattr)
+{
+ CTSize bofs = 0, bmaxofs = 0; /* Bit offset and max. bit offset. */
+ CTSize maxalign = ctype_align(sattr);
+ CType *sct = ctype_get(cp->cts, sid);
+ CTInfo sinfo = sct->info;
+ CTypeID fieldid = sct->sib;
+ while (fieldid) {
+ CType *ct = ctype_get(cp->cts, fieldid);
+ CTInfo attr = ct->size; /* Field declaration attributes (temp.). */
+
+ if (ctype_isfield(ct->info) ||
+ (ctype_isxattrib(ct->info, CTA_SUBTYPE) && attr)) {
+ CTSize align, amask; /* Alignment (pow2) and alignment mask (bits). */
+ CTSize sz;
+ CTInfo info = lj_ctype_info(cp->cts, ctype_cid(ct->info), &sz);
+ CTSize bsz, csz = 8*sz; /* Field size and container size (in bits). */
+ sinfo |= (info & (CTF_QUAL|CTF_VLA)); /* Merge pseudo-qualifiers. */
+
+ /* Check for size overflow and determine alignment. */
+ if (sz >= 0x20000000u || bofs + csz < bofs || (info & CTF_VLA)) {
+ if (!(sz == CTSIZE_INVALID && ctype_isarray(info) &&
+ !(sinfo & CTF_UNION)))
+ cp_err(cp, LJ_ERR_FFI_INVSIZE);
+ csz = sz = 0; /* Treat a[] and a[?] as zero-sized. */
+ }
+ align = cp_field_align(cp, ct, info);
+ if (((attr|sattr) & CTFP_PACKED) ||
+ ((attr & CTFP_ALIGNED) && ctype_align(attr) > align))
+ align = ctype_align(attr);
+ if (cp->packstack[cp->curpack] < align)
+ align = cp->packstack[cp->curpack];
+ if (align > maxalign) maxalign = align;
+ amask = (8u << align) - 1;
+
+ bsz = ctype_bitcsz(ct->info); /* Bitfield size (temp.). */
+ if (bsz == CTBSZ_FIELD || !ctype_isfield(ct->info)) {
+ bsz = csz; /* Regular fields or subtypes always fill the container. */
+ bofs = (bofs + amask) & ~amask; /* Start new aligned field. */
+ ct->size = (bofs >> 3); /* Store field offset. */
+ } else { /* Bitfield. */
+ if (bsz == 0 || (attr & CTFP_ALIGNED) ||
+ (!((attr|sattr) & CTFP_PACKED) && (bofs & amask) + bsz > csz))
+ bofs = (bofs + amask) & ~amask; /* Start new aligned field. */
+
+ /* Prefer regular field over bitfield. */
+ if (bsz == csz && (bofs & amask) == 0) {
+ ct->info = CTINFO(CT_FIELD, ctype_cid(ct->info));
+ ct->size = (bofs >> 3); /* Store field offset. */
+ } else {
+ ct->info = CTINFO(CT_BITFIELD,
+ (info & (CTF_QUAL|CTF_UNSIGNED|CTF_BOOL)) +
+ (csz << (CTSHIFT_BITCSZ-3)) + (bsz << CTSHIFT_BITBSZ));
+#if LJ_BE
+ ct->info += ((csz - (bofs & (csz-1)) - bsz) << CTSHIFT_BITPOS);
+#else
+ ct->info += ((bofs & (csz-1)) << CTSHIFT_BITPOS);
+#endif
+ ct->size = ((bofs & ~(csz-1)) >> 3); /* Store container offset. */
+ }
+ }
+
+ /* Determine next offset or max. offset. */
+ if ((sinfo & CTF_UNION)) {
+ if (bsz > bmaxofs) bmaxofs = bsz;
+ } else {
+ bofs += bsz;
+ }
+ } /* All other fields in the chain are already set up. */
+
+ fieldid = ct->sib;
+ }
+
+ /* Complete struct/union. */
+ sct->info = sinfo + CTALIGN(maxalign);
+ bofs = (sinfo & CTF_UNION) ? bmaxofs : bofs;
+ maxalign = (8u << maxalign) - 1;
+ sct->size = (((bofs + maxalign) & ~maxalign) >> 3);
+}
+
+/* Parse struct/union declaration. */
+static CTypeID cp_decl_struct(CPState *cp, CPDecl *sdecl, CTInfo sinfo)
+{
+ CTypeID sid = cp_struct_name(cp, sdecl, sinfo);
+ if (cp_opt(cp, '{')) { /* Struct/union definition. */
+ CTypeID lastid = sid;
+ int lastdecl = 0;
+ while (cp->tok != '}') {
+ CPDecl decl;
+ CPscl scl = cp_decl_spec(cp, &decl, CDF_STATIC);
+ decl.mode = scl ? CPARSE_MODE_DIRECT :
+ CPARSE_MODE_DIRECT|CPARSE_MODE_ABSTRACT|CPARSE_MODE_FIELD;
+
+ for (;;) {
+ CTypeID ctypeid;
+
+ if (lastdecl) cp_err_token(cp, '}');
+
+ /* Parse field declarator. */
+ decl.bits = CTSIZE_INVALID;
+ cp_declarator(cp, &decl);
+ ctypeid = cp_decl_intern(cp, &decl);
+
+ if ((scl & CDF_STATIC)) { /* Static constant in struct namespace. */
+ CType *ct;
+ CTypeID fieldid = cp_decl_constinit(cp, &ct, ctypeid);
+ ctype_get(cp->cts, lastid)->sib = fieldid;
+ lastid = fieldid;
+ ctype_setname(ct, decl.name);
+ } else {
+ CTSize bsz = CTBSZ_FIELD; /* Temp. for layout phase. */
+ CType *ct;
+ CTypeID fieldid = lj_ctype_new(cp->cts, &ct); /* Do this first. */
+ CType *tct = ctype_raw(cp->cts, ctypeid);
+
+ if (decl.bits == CTSIZE_INVALID) { /* Regular field. */
+ if (ctype_isarray(tct->info) && tct->size == CTSIZE_INVALID)
+ lastdecl = 1; /* a[] or a[?] must be the last declared field. */
+
+ /* Accept transparent struct/union/enum. */
+ if (!decl.name) {
+ if (!((ctype_isstruct(tct->info) && !(tct->info & CTF_VLA)) ||
+ ctype_isenum(tct->info)))
+ cp_err_token(cp, CTOK_IDENT);
+ ct->info = CTINFO(CT_ATTRIB, CTATTRIB(CTA_SUBTYPE) + ctypeid);
+ ct->size = ctype_isstruct(tct->info) ?
+ (decl.attr|0x80000000u) : 0; /* For layout phase. */
+ goto add_field;
+ }
+ } else { /* Bitfield. */
+ bsz = decl.bits;
+ if (!ctype_isinteger_or_bool(tct->info) ||
+ (bsz == 0 && decl.name) || 8*tct->size > CTBSZ_MAX ||
+ bsz > ((tct->info & CTF_BOOL) ? 1 : 8*tct->size))
+ cp_errmsg(cp, ':', LJ_ERR_BADVAL);
+ }
+
+ /* Create temporary field for layout phase. */
+ ct->info = CTINFO(CT_FIELD, ctypeid + (bsz << CTSHIFT_BITCSZ));
+ ct->size = decl.attr;
+ if (decl.name) ctype_setname(ct, decl.name);
+
+ add_field:
+ ctype_get(cp->cts, lastid)->sib = fieldid;
+ lastid = fieldid;
+ }
+ if (!cp_opt(cp, ',')) break;
+ cp_decl_reset(&decl);
+ }
+ cp_check(cp, ';');
+ }
+ cp_check(cp, '}');
+ ctype_get(cp->cts, lastid)->sib = 0; /* Drop sib = 1 for empty structs. */
+ cp_decl_attributes(cp, sdecl); /* Layout phase needs postfix attributes. */
+ cp_struct_layout(cp, sid, sdecl->attr);
+ }
+ return sid;
+}
+
+/* Parse enum declaration. */
+static CTypeID cp_decl_enum(CPState *cp, CPDecl *sdecl)
+{
+ CTypeID eid = cp_struct_name(cp, sdecl, CTINFO(CT_ENUM, CTID_VOID));
+ CTInfo einfo = CTINFO(CT_ENUM, CTALIGN(2) + CTID_UINT32);
+ CTSize esize = 4; /* Only 32 bit enums are supported. */
+ if (cp_opt(cp, '{')) { /* Enum definition. */
+ CPValue k;
+ CTypeID lastid = eid;
+ k.u32 = 0;
+ k.id = CTID_INT32;
+ do {
+ GCstr *name = cp->str;
+ if (cp->tok != CTOK_IDENT) cp_err_token(cp, CTOK_IDENT);
+ if (cp->val.id) cp_errmsg(cp, 0, LJ_ERR_FFI_REDEF, strdata(name));
+ cp_next(cp);
+ if (cp_opt(cp, '=')) {
+ cp_expr_kint(cp, &k);
+ if (k.id == CTID_UINT32) {
+ /* C99 says that enum constants are always (signed) integers.
+ ** But since unsigned constants like 0x80000000 are quite common,
+ ** those are left as uint32_t.
+ */
+ if (k.i32 >= 0) k.id = CTID_INT32;
+ } else {
+ /* OTOH it's common practice and even mandated by some ABIs
+ ** that the enum type itself is unsigned, unless there are any
+ ** negative constants.
+ */
+ k.id = CTID_INT32;
+ if (k.i32 < 0) einfo = CTINFO(CT_ENUM, CTALIGN(2) + CTID_INT32);
+ }
+ }
+ /* Add named enum constant. */
+ {
+ CType *ct;
+ CTypeID constid = lj_ctype_new(cp->cts, &ct);
+ ctype_get(cp->cts, lastid)->sib = constid;
+ lastid = constid;
+ ctype_setname(ct, name);
+ ct->info = CTINFO(CT_CONSTVAL, CTF_CONST|k.id);
+ ct->size = k.u32++;
+ if (k.u32 == 0x80000000u) k.id = CTID_UINT32;
+ lj_ctype_addname(cp->cts, ct, constid);
+ }
+ if (!cp_opt(cp, ',')) break;
+ } while (cp->tok != '}'); /* Trailing ',' is ok. */
+ cp_check(cp, '}');
+ /* Complete enum. */
+ ctype_get(cp->cts, eid)->info = einfo;
+ ctype_get(cp->cts, eid)->size = esize;
+ }
+ return eid;
+}
+
+/* Parse declaration specifiers. */
+static CPscl cp_decl_spec(CPState *cp, CPDecl *decl, CPscl scl)
+{
+ uint32_t cds = 0, sz = 0;
+ CTypeID tdef = 0;
+
+ decl->cp = cp;
+ decl->mode = cp->mode;
+ decl->name = NULL;
+ decl->redir = NULL;
+ decl->attr = 0;
+ decl->fattr = 0;
+ decl->pos = decl->top = 0;
+ decl->stack[0].next = 0;
+
+ for (;;) { /* Parse basic types. */
+ cp_decl_attributes(cp, decl);
+ if (cp->tok >= CTOK_FIRSTDECL && cp->tok <= CTOK_LASTDECLFLAG) {
+ uint32_t cbit;
+ if (cp->ct->size) {
+ if (sz) goto end_decl;
+ sz = cp->ct->size;
+ }
+ cbit = (1u << (cp->tok - CTOK_FIRSTDECL));
+ cds = cds | cbit | ((cbit & cds & CDF_LONG) << 1);
+ if (cp->tok >= CTOK_FIRSTSCL) {
+ if (!(scl & cbit)) cp_errmsg(cp, cp->tok, LJ_ERR_FFI_BADSCL);
+ } else if (tdef) {
+ goto end_decl;
+ }
+ cp_next(cp);
+ continue;
+ }
+ if (sz || tdef ||
+ (cds & (CDF_SHORT|CDF_LONG|CDF_SIGNED|CDF_UNSIGNED|CDF_COMPLEX)))
+ break;
+ switch (cp->tok) {
+ case CTOK_STRUCT:
+ tdef = cp_decl_struct(cp, decl, CTINFO(CT_STRUCT, 0));
+ continue;
+ case CTOK_UNION:
+ tdef = cp_decl_struct(cp, decl, CTINFO(CT_STRUCT, CTF_UNION));
+ continue;
+ case CTOK_ENUM:
+ tdef = cp_decl_enum(cp, decl);
+ continue;
+ case CTOK_IDENT:
+ if (ctype_istypedef(cp->ct->info)) {
+ tdef = ctype_cid(cp->ct->info); /* Get typedef. */
+ cp_next(cp);
+ continue;
+ }
+ break;
+ case '$':
+ tdef = cp->val.id;
+ cp_next(cp);
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+end_decl:
+
+ if ((cds & CDF_COMPLEX)) /* Use predefined complex types. */
+ tdef = sz == 4 ? CTID_COMPLEX_FLOAT : CTID_COMPLEX_DOUBLE;
+
+ if (tdef) {
+ cp_push_type(decl, tdef);
+ } else if ((cds & CDF_VOID)) {
+ cp_push(decl, CTINFO(CT_VOID, (decl->attr & CTF_QUAL)), CTSIZE_INVALID);
+ decl->attr &= ~CTF_QUAL;
+ } else {
+ /* Determine type info and size. */
+ CTInfo info = CTINFO(CT_NUM, (cds & CDF_UNSIGNED) ? CTF_UNSIGNED : 0);
+ if ((cds & CDF_BOOL)) {
+ if ((cds & ~(CDF_SCL|CDF_BOOL|CDF_INT|CDF_SIGNED|CDF_UNSIGNED)))
+ cp_errmsg(cp, 0, LJ_ERR_FFI_INVTYPE);
+ info |= CTF_BOOL;
+ if (!(cds & CDF_SIGNED)) info |= CTF_UNSIGNED;
+ if (!sz) {
+ sz = 1;
+ }
+ } else if ((cds & CDF_FP)) {
+ info = CTINFO(CT_NUM, CTF_FP);
+ if ((cds & CDF_LONG)) sz = sizeof(long double);
+ } else if ((cds & CDF_CHAR)) {
+ if ((cds & (CDF_CHAR|CDF_SIGNED|CDF_UNSIGNED)) == CDF_CHAR)
+ info |= CTF_UCHAR; /* Handle platforms where char is unsigned. */
+ } else if ((cds & CDF_SHORT)) {
+ sz = sizeof(short);
+ } else if ((cds & CDF_LONGLONG)) {
+ sz = 8;
+ } else if ((cds & CDF_LONG)) {
+ info |= CTF_LONG;
+ sz = sizeof(long);
+ } else if (!sz) {
+ if (!(cds & (CDF_SIGNED|CDF_UNSIGNED)))
+ cp_errmsg(cp, cp->tok, LJ_ERR_FFI_DECLSPEC);
+ sz = sizeof(int);
+ }
+ lua_assert(sz != 0);
+ info += CTALIGN(lj_fls(sz)); /* Use natural alignment. */
+ info += (decl->attr & CTF_QUAL); /* Merge qualifiers. */
+ cp_push(decl, info, sz);
+ decl->attr &= ~CTF_QUAL;
+ }
+ decl->specpos = decl->pos;
+ decl->specattr = decl->attr;
+ decl->specfattr = decl->fattr;
+ return (cds & CDF_SCL); /* Return storage class. */
+}
+
+/* Parse array declaration. */
+static void cp_decl_array(CPState *cp, CPDecl *decl)
+{
+ CTInfo info = CTINFO(CT_ARRAY, 0);
+ CTSize nelem = CTSIZE_INVALID; /* Default size for a[] or a[?]. */
+ cp_decl_attributes(cp, decl);
+ if (cp_opt(cp, '?'))
+ info |= CTF_VLA; /* Create variable-length array a[?]. */
+ else if (cp->tok != ']')
+ nelem = cp_expr_ksize(cp);
+ cp_check(cp, ']');
+ cp_add(decl, info, nelem);
+}
+
+/* Parse function declaration. */
+static void cp_decl_func(CPState *cp, CPDecl *fdecl)
+{
+ CTSize nargs = 0;
+ CTInfo info = CTINFO(CT_FUNC, 0);
+ CTypeID lastid = 0, anchor = 0;
+ if (cp->tok != ')') {
+ do {
+ CPDecl decl;
+ CTypeID ctypeid, fieldid;
+ CType *ct;
+ if (cp_opt(cp, '.')) { /* Vararg function. */
+ cp_check(cp, '.'); /* Workaround for the minimalistic lexer. */
+ cp_check(cp, '.');
+ info |= CTF_VARARG;
+ break;
+ }
+ cp_decl_spec(cp, &decl, CDF_REGISTER);
+ decl.mode = CPARSE_MODE_DIRECT|CPARSE_MODE_ABSTRACT;
+ cp_declarator(cp, &decl);
+ ctypeid = cp_decl_intern(cp, &decl);
+ ct = ctype_raw(cp->cts, ctypeid);
+ if (ctype_isvoid(ct->info))
+ break;
+ else if (ctype_isrefarray(ct->info))
+ ctypeid = lj_ctype_intern(cp->cts,
+ CTINFO(CT_PTR, CTALIGN_PTR|ctype_cid(ct->info)), CTSIZE_PTR);
+ else if (ctype_isfunc(ct->info))
+ ctypeid = lj_ctype_intern(cp->cts,
+ CTINFO(CT_PTR, CTALIGN_PTR|ctypeid), CTSIZE_PTR);
+ /* Add new parameter. */
+ fieldid = lj_ctype_new(cp->cts, &ct);
+ if (anchor)
+ ctype_get(cp->cts, lastid)->sib = fieldid;
+ else
+ anchor = fieldid;
+ lastid = fieldid;
+ if (decl.name) ctype_setname(ct, decl.name);
+ ct->info = CTINFO(CT_FIELD, ctypeid);
+ ct->size = nargs++;
+ } while (cp_opt(cp, ','));
+ }
+ cp_check(cp, ')');
+ if (cp_opt(cp, '{')) { /* Skip function definition. */
+ int level = 1;
+ cp->mode |= CPARSE_MODE_SKIP;
+ for (;;) {
+ if (cp->tok == '{') level++;
+ else if (cp->tok == '}' && --level == 0) break;
+ else if (cp->tok == CTOK_EOF) cp_err_token(cp, '}');
+ cp_next(cp);
+ }
+ cp->mode &= ~CPARSE_MODE_SKIP;
+ cp->tok = ';'; /* Ok for cp_decl_multi(), error in cp_decl_single(). */
+ }
+ info |= (fdecl->fattr & ~CTMASK_CID);
+ fdecl->fattr = 0;
+ fdecl->stack[cp_add(fdecl, info, nargs)].sib = anchor;
+}
+
+/* Parse declarator. */
+static void cp_declarator(CPState *cp, CPDecl *decl)
+{
+ if (++cp->depth > CPARSE_MAX_DECLDEPTH) cp_err(cp, LJ_ERR_XLEVELS);
+
+ for (;;) { /* Head of declarator. */
+ if (cp_opt(cp, '*')) { /* Pointer. */
+ CTSize sz;
+ CTInfo info;
+ cp_decl_attributes(cp, decl);
+ sz = CTSIZE_PTR;
+ info = CTINFO(CT_PTR, CTALIGN_PTR);
+#if LJ_64
+ if (ctype_msizeP(decl->attr) == 4) {
+ sz = 4;
+ info = CTINFO(CT_PTR, CTALIGN(2));
+ }
+#endif
+ info += (decl->attr & (CTF_QUAL|CTF_REF));
+ decl->attr &= ~(CTF_QUAL|(CTMASK_MSIZEP<<CTSHIFT_MSIZEP));
+ cp_push(decl, info, sz);
+ } else if (cp_opt(cp, '&') || cp_opt(cp, CTOK_ANDAND)) { /* Reference. */
+ decl->attr &= ~(CTF_QUAL|(CTMASK_MSIZEP<<CTSHIFT_MSIZEP));
+ cp_push(decl, CTINFO_REF(0), CTSIZE_PTR);
+ } else {
+ break;
+ }
+ }
+
+ if (cp_opt(cp, '(')) { /* Inner declarator. */
+ CPDeclIdx pos;
+ cp_decl_attributes(cp, decl);
+ /* Resolve ambiguity between inner declarator and 1st function parameter. */
+ if ((decl->mode & CPARSE_MODE_ABSTRACT) &&
+ (cp->tok == ')' || cp_istypedecl(cp))) goto func_decl;
+ pos = decl->pos;
+ cp_declarator(cp, decl);
+ cp_check(cp, ')');
+ decl->pos = pos;
+ } else if (cp->tok == CTOK_IDENT) { /* Direct declarator. */
+ if (!(decl->mode & CPARSE_MODE_DIRECT)) cp_err_token(cp, CTOK_EOF);
+ decl->name = cp->str;
+ decl->nameid = cp->val.id;
+ cp_next(cp);
+ } else { /* Abstract declarator. */
+ if (!(decl->mode & CPARSE_MODE_ABSTRACT)) cp_err_token(cp, CTOK_IDENT);
+ }
+
+ for (;;) { /* Tail of declarator. */
+ if (cp_opt(cp, '[')) { /* Array. */
+ cp_decl_array(cp, decl);
+ } else if (cp_opt(cp, '(')) { /* Function. */
+ func_decl:
+ cp_decl_func(cp, decl);
+ } else {
+ break;
+ }
+ }
+
+ if ((decl->mode & CPARSE_MODE_FIELD) && cp_opt(cp, ':')) /* Field width. */
+ decl->bits = cp_expr_ksize(cp);
+
+ /* Process postfix attributes. */
+ cp_decl_attributes(cp, decl);
+ cp_push_attributes(decl);
+
+ cp->depth--;
+}
+
+/* Parse an abstract type declaration and return it's C type ID. */
+static CTypeID cp_decl_abstract(CPState *cp)
+{
+ CPDecl decl;
+ cp_decl_spec(cp, &decl, 0);
+ decl.mode = CPARSE_MODE_ABSTRACT;
+ cp_declarator(cp, &decl);
+ return cp_decl_intern(cp, &decl);
+}
+
+/* Handle pragmas. */
+static void cp_pragma(CPState *cp, BCLine pragmaline)
+{
+ cp_next(cp);
+ if (cp->tok == CTOK_IDENT &&
+ cp->str->hash == H_(e79b999f,42ca3e85)) { /* pack */
+ cp_next(cp);
+ cp_check(cp, '(');
+ if (cp->tok == CTOK_IDENT) {
+ if (cp->str->hash == H_(738e923c,a1b65954)) { /* push */
+ if (cp->curpack < CPARSE_MAX_PACKSTACK) {
+ cp->packstack[cp->curpack+1] = cp->packstack[cp->curpack];
+ cp->curpack++;
+ }
+ } else if (cp->str->hash == H_(6c71cf27,6c71cf27)) { /* pop */
+ if (cp->curpack > 0) cp->curpack--;
+ } else {
+ cp_errmsg(cp, cp->tok, LJ_ERR_XSYMBOL);
+ }
+ cp_next(cp);
+ if (!cp_opt(cp, ',')) goto end_pack;
+ }
+ if (cp->tok == CTOK_INTEGER) {
+ cp->packstack[cp->curpack] = cp->val.u32 ? lj_fls(cp->val.u32) : 0;
+ cp_next(cp);
+ } else {
+ cp->packstack[cp->curpack] = 255;
+ }
+ end_pack:
+ cp_check(cp, ')');
+ } else { /* Ignore all other pragmas. */
+ while (cp->tok != CTOK_EOF && cp->linenumber == pragmaline)
+ cp_next(cp);
+ }
+}
+
+/* Parse multiple C declarations of types or extern identifiers. */
+static void cp_decl_multi(CPState *cp)
+{
+ int first = 1;
+ while (cp->tok != CTOK_EOF) {
+ CPDecl decl;
+ CPscl scl;
+ if (cp_opt(cp, ';')) { /* Skip empty statements. */
+ first = 0;
+ continue;
+ }
+ if (cp->tok == '#') { /* Workaround, since we have no preprocessor, yet. */
+ BCLine pragmaline = cp->linenumber;
+ if (!(cp_next(cp) == CTOK_IDENT &&
+ cp->str->hash == H_(f5e6b4f8,1d509107))) /* pragma */
+ cp_errmsg(cp, cp->tok, LJ_ERR_XSYMBOL);
+ cp_pragma(cp, pragmaline);
+ continue;
+ }
+ scl = cp_decl_spec(cp, &decl, CDF_TYPEDEF|CDF_EXTERN|CDF_STATIC);
+ if ((cp->tok == ';' || cp->tok == CTOK_EOF) &&
+ ctype_istypedef(decl.stack[0].info)) {
+ CTInfo info = ctype_rawchild(cp->cts, &decl.stack[0])->info;
+ if (ctype_isstruct(info) || ctype_isenum(info))
+ goto decl_end; /* Accept empty declaration of struct/union/enum. */
+ }
+ for (;;) {
+ CTypeID ctypeid;
+ cp_declarator(cp, &decl);
+ ctypeid = cp_decl_intern(cp, &decl);
+ if (decl.name && !decl.nameid) { /* NYI: redeclarations are ignored. */
+ CType *ct;
+ CTypeID id;
+ if ((scl & CDF_TYPEDEF)) { /* Create new typedef. */
+ id = lj_ctype_new(cp->cts, &ct);
+ ct->info = CTINFO(CT_TYPEDEF, ctypeid);
+ goto noredir;
+ } else if (ctype_isfunc(ctype_get(cp->cts, ctypeid)->info)) {
+ /* Treat both static and extern function declarations as extern. */
+ ct = ctype_get(cp->cts, ctypeid);
+ /* We always get new anonymous functions (typedefs are copied). */
+ lua_assert(gcref(ct->name) == NULL);
+ id = ctypeid; /* Just name it. */
+ } else if ((scl & CDF_STATIC)) { /* Accept static constants. */
+ id = cp_decl_constinit(cp, &ct, ctypeid);
+ goto noredir;
+ } else { /* External references have extern or no storage class. */
+ id = lj_ctype_new(cp->cts, &ct);
+ ct->info = CTINFO(CT_EXTERN, ctypeid);
+ }
+ if (decl.redir) { /* Add attribute for redirected symbol name. */
+ CType *cta;
+ CTypeID aid = lj_ctype_new(cp->cts, &cta);
+ ct = ctype_get(cp->cts, id); /* Table may have been reallocated. */
+ cta->info = CTINFO(CT_ATTRIB, CTATTRIB(CTA_REDIR));
+ cta->sib = ct->sib;
+ ct->sib = aid;
+ ctype_setname(cta, decl.redir);
+ }
+ noredir:
+ ctype_setname(ct, decl.name);
+ lj_ctype_addname(cp->cts, ct, id);
+ }
+ if (!cp_opt(cp, ',')) break;
+ cp_decl_reset(&decl);
+ }
+ decl_end:
+ if (cp->tok == CTOK_EOF && first) break; /* May omit ';' for 1 decl. */
+ first = 0;
+ cp_check(cp, ';');
+ }
+}
+
+/* Parse a single C type declaration. */
+static void cp_decl_single(CPState *cp)
+{
+ CPDecl decl;
+ cp_decl_spec(cp, &decl, 0);
+ cp_declarator(cp, &decl);
+ cp->val.id = cp_decl_intern(cp, &decl);
+ if (cp->tok != CTOK_EOF) cp_err_token(cp, CTOK_EOF);
+}
+
+#undef H_
+
+/* ------------------------------------------------------------------------ */
+
+/* Protected callback for C parser. */
+static TValue *cpcparser(lua_State *L, lua_CFunction dummy, void *ud)
+{
+ CPState *cp = (CPState *)ud;
+ UNUSED(dummy);
+ cframe_errfunc(L->cframe) = -1; /* Inherit error function. */
+ cp_init(cp);
+ if ((cp->mode & CPARSE_MODE_MULTI))
+ cp_decl_multi(cp);
+ else
+ cp_decl_single(cp);
+ if (cp->param && cp->param != cp->L->top)
+ cp_err(cp, LJ_ERR_FFI_NUMPARAM);
+ lua_assert(cp->depth == 0);
+ return NULL;
+}
+
+/* C parser. */
+int lj_cparse(CPState *cp)
+{
+ LJ_CTYPE_SAVE(cp->cts);
+ int errcode = lj_vm_cpcall(cp->L, NULL, cp, cpcparser);
+ if (errcode)
+ LJ_CTYPE_RESTORE(cp->cts);
+ cp_cleanup(cp);
+ return errcode;
+}
+
+#endif
http://git-wip-us.apache.org/repos/asf/trafficserver/blob/1f27b840/lib/luajit/src/lj_cparse.h
----------------------------------------------------------------------
diff --git a/lib/luajit/src/lj_cparse.h b/lib/luajit/src/lj_cparse.h
new file mode 100644
index 0000000..441580d
--- /dev/null
+++ b/lib/luajit/src/lj_cparse.h
@@ -0,0 +1,65 @@
+/*
+** C declaration parser.
+** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#ifndef _LJ_CPARSE_H
+#define _LJ_CPARSE_H
+
+#include "lj_obj.h"
+#include "lj_ctype.h"
+
+#if LJ_HASFFI
+
+/* C parser limits. */
+#define CPARSE_MAX_BUF 32768 /* Max. token buffer size. */
+#define CPARSE_MAX_DECLSTACK 100 /* Max. declaration stack depth. */
+#define CPARSE_MAX_DECLDEPTH 20 /* Max. recursive declaration depth. */
+#define CPARSE_MAX_PACKSTACK 7 /* Max. pack pragma stack depth. */
+
+/* Flags for C parser mode. */
+#define CPARSE_MODE_MULTI 1 /* Process multiple declarations. */
+#define CPARSE_MODE_ABSTRACT 2 /* Accept abstract declarators. */
+#define CPARSE_MODE_DIRECT 4 /* Accept direct declarators. */
+#define CPARSE_MODE_FIELD 8 /* Accept field width in bits, too. */
+#define CPARSE_MODE_NOIMPLICIT 16 /* Reject implicit declarations. */
+#define CPARSE_MODE_SKIP 32 /* Skip definitions, ignore errors. */
+
+typedef int CPChar; /* C parser character. Unsigned ext. from char. */
+typedef int CPToken; /* C parser token. */
+
+/* C parser internal value representation. */
+typedef struct CPValue {
+ union {
+ int32_t i32; /* Value for CTID_INT32. */
+ uint32_t u32; /* Value for CTID_UINT32. */
+ };
+ CTypeID id; /* C Type ID of the value. */
+} CPValue;
+
+/* C parser state. */
+typedef struct CPState {
+ CPChar c; /* Current character. */
+ CPToken tok; /* Current token. */
+ CPValue val; /* Token value. */
+ GCstr *str; /* Interned string of identifier/keyword. */
+ CType *ct; /* C type table entry. */
+ const char *p; /* Current position in input buffer. */
+ SBuf sb; /* String buffer for tokens. */
+ lua_State *L; /* Lua state. */
+ CTState *cts; /* C type state. */
+ TValue *param; /* C type parameters. */
+ const char *srcname; /* Current source name. */
+ BCLine linenumber; /* Input line counter. */
+ int depth; /* Recursive declaration depth. */
+ uint32_t tmask; /* Type mask for next identifier. */
+ uint32_t mode; /* C parser mode. */
+ uint8_t packstack[CPARSE_MAX_PACKSTACK]; /* Stack for pack pragmas. */
+ uint8_t curpack; /* Current position in pack pragma stack. */
+} CPState;
+
+LJ_FUNC int lj_cparse(CPState *cp);
+
+#endif
+
+#endif