diff options
Diffstat (limited to '')
| -rw-r--r-- | src/civetweb/src/third_party/duktape-1.8.0/src-separate/duk_bi_regexp.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/civetweb/src/third_party/duktape-1.8.0/src-separate/duk_bi_regexp.c b/src/civetweb/src/third_party/duktape-1.8.0/src-separate/duk_bi_regexp.c new file mode 100644 index 000000000..2259c776a --- /dev/null +++ b/src/civetweb/src/third_party/duktape-1.8.0/src-separate/duk_bi_regexp.c @@ -0,0 +1,209 @@ +/* + * RegExp built-ins + */ + +#include "duk_internal.h" + +#ifdef DUK_USE_REGEXP_SUPPORT + +DUK_LOCAL void duk__get_this_regexp(duk_context *ctx) { + duk_hobject *h; + + duk_push_this(ctx); + h = duk_require_hobject_with_class(ctx, -1, DUK_HOBJECT_CLASS_REGEXP); + DUK_ASSERT(h != NULL); + DUK_UNREF(h); + duk_insert(ctx, 0); /* prepend regexp to valstack 0 index */ +} + +/* XXX: much to improve (code size) */ +DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx) { + duk_hthread *thr = (duk_hthread *) ctx; + duk_hobject *h_pattern; + + DUK_ASSERT_TOP(ctx, 2); + h_pattern = duk_get_hobject(ctx, 0); + + if (!duk_is_constructor_call(ctx) && + h_pattern != NULL && + DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP && + duk_is_undefined(ctx, 1)) { + /* Called as a function, pattern has [[Class]] "RegExp" and + * flags is undefined -> return object as is. + */ + duk_dup(ctx, 0); + return 1; + } + + /* Else functionality is identical for function call and constructor + * call. + */ + + if (h_pattern != NULL && + DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP) { + if (duk_is_undefined(ctx, 1)) { + duk_bool_t flag_g, flag_i, flag_m; + duk_get_prop_stridx(ctx, 0, DUK_STRIDX_SOURCE); + flag_g = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_GLOBAL, NULL); + flag_i = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_IGNORE_CASE, NULL); + flag_m = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_MULTILINE, NULL); + + duk_push_sprintf(ctx, "%s%s%s", + (const char *) (flag_g ? "g" : ""), + (const char *) (flag_i ? "i" : ""), + (const char *) (flag_m ? "m" : "")); + + /* [ ... pattern flags ] */ + } else { + return DUK_RET_TYPE_ERROR; + } + } else { + if (duk_is_undefined(ctx, 0)) { + duk_push_string(ctx, ""); + } else { + duk_dup(ctx, 0); + duk_to_string(ctx, -1); + } + if (duk_is_undefined(ctx, 1)) { + duk_push_string(ctx, ""); + } else { + duk_dup(ctx, 1); + duk_to_string(ctx, -1); + } + + /* [ ... pattern flags ] */ + } + + DUK_DDD(DUK_DDDPRINT("RegExp constructor/function call, pattern=%!T, flags=%!T", + (duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1))); + + /* [ ... pattern flags ] */ + + duk_regexp_compile(thr); + + /* [ ... bytecode escaped_source ] */ + + duk_regexp_create_instance(thr); + + /* [ ... RegExp ] */ + + return 1; +} + +DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_exec(duk_context *ctx) { + duk__get_this_regexp(ctx); + + /* [ regexp input ] */ + + duk_regexp_match((duk_hthread *) ctx); + + /* [ result ] */ + + return 1; +} + +DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_test(duk_context *ctx) { + duk__get_this_regexp(ctx); + + /* [ regexp input ] */ + + /* result object is created and discarded; wasteful but saves code space */ + duk_regexp_match((duk_hthread *) ctx); + + /* [ result ] */ + + duk_push_boolean(ctx, (duk_is_null(ctx, -1) ? 0 : 1)); + + return 1; +} + +DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_to_string(duk_context *ctx) { + duk_hstring *h_bc; + duk_small_int_t re_flags; + +#if 0 + /* A little tricky string approach to provide the flags string. + * This depends on the specific flag values in duk_regexp.h, + * which needs to be asserted for. In practice this doesn't + * produce more compact code than the easier approach in use. + */ + + const char *flag_strings = "gim\0gi\0gm\0g\0"; + duk_uint8_t flag_offsets[8] = { + (duk_uint8_t) 3, /* flags: "" */ + (duk_uint8_t) 10, /* flags: "g" */ + (duk_uint8_t) 5, /* flags: "i" */ + (duk_uint8_t) 4, /* flags: "gi" */ + (duk_uint8_t) 2, /* flags: "m" */ + (duk_uint8_t) 7, /* flags: "gm" */ + (duk_uint8_t) 1, /* flags: "im" */ + (duk_uint8_t) 0, /* flags: "gim" */ + }; + DUK_ASSERT(DUK_RE_FLAG_GLOBAL == 1); + DUK_ASSERT(DUK_RE_FLAG_IGNORE_CASE == 2); + DUK_ASSERT(DUK_RE_FLAG_MULTILINE == 4); +#endif + + duk__get_this_regexp(ctx); + + /* [ regexp ] */ + + duk_get_prop_stridx(ctx, 0, DUK_STRIDX_SOURCE); + duk_get_prop_stridx(ctx, 0, DUK_STRIDX_INT_BYTECODE); + h_bc = duk_get_hstring(ctx, -1); + DUK_ASSERT(h_bc != NULL); + DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(h_bc) >= 1); + DUK_ASSERT(DUK_HSTRING_GET_CHARLEN(h_bc) >= 1); + DUK_ASSERT(DUK_HSTRING_GET_DATA(h_bc)[0] < 0x80); + re_flags = (duk_small_int_t) DUK_HSTRING_GET_DATA(h_bc)[0]; + + /* [ regexp source bytecode ] */ + +#if 1 + /* This is a cleaner approach and also produces smaller code than + * the other alternative. Use duk_require_string() for format + * safety (although the source property should always exist). + */ + duk_push_sprintf(ctx, "/%s/%s%s%s", + (const char *) duk_require_string(ctx, -2), /* require to be safe */ + (re_flags & DUK_RE_FLAG_GLOBAL) ? "g" : "", + (re_flags & DUK_RE_FLAG_IGNORE_CASE) ? "i" : "", + (re_flags & DUK_RE_FLAG_MULTILINE) ? "m" : ""); +#else + /* This should not be necessary because no-one should tamper with the + * regexp bytecode, but is prudent to avoid potential segfaults if that + * were to happen for some reason. + */ + re_flags &= 0x07; + DUK_ASSERT(re_flags >= 0 && re_flags <= 7); /* three flags */ + duk_push_sprintf(ctx, "/%s/%s", + (const char *) duk_require_string(ctx, -2), + (const char *) (flag_strings + flag_offsets[re_flags])); +#endif + + return 1; +} + +#else /* DUK_USE_REGEXP_SUPPORT */ + +DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx) { + DUK_UNREF(ctx); + return DUK_RET_UNSUPPORTED_ERROR; +} + +DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_exec(duk_context *ctx) { + DUK_UNREF(ctx); + return DUK_RET_UNSUPPORTED_ERROR; +} + +DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_test(duk_context *ctx) { + DUK_UNREF(ctx); + return DUK_RET_UNSUPPORTED_ERROR; +} + +DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_to_string(duk_context *ctx) { + DUK_UNREF(ctx); + return DUK_RET_UNSUPPORTED_ERROR; +} + +#endif /* DUK_USE_REGEXP_SUPPORT */ |