ref: a42d36ba8e43455a9785008c3e811bf332b05784
dir: /jsstring.c/
#include "jsi.h"
#include "jsvalue.h"
#include "jsbuiltin.h"
#include "utf.h"
#include "regex.h"
#define nelem(a) (sizeof (a) / sizeof (a)[0])
int js_runeat(js_State *J, const char *s, int i)
{
Rune rune = 0;
while (i-- >= 0) {
rune = *(unsigned char*)s;
if (rune < Runeself) {
if (rune == 0)
return 0;
++s;
} else
s += chartorune(&rune, s);
}
return rune;
}
const char *js_utfidxtoptr(const char *s, int i)
{
Rune rune;
while (i-- > 0) {
rune = *(unsigned char*)s;
if (rune < Runeself) {
if (rune == 0)
return NULL;
++s;
} else
s += chartorune(&rune, s);
}
return s;
}
int js_utfptrtoidx(const char *s, const char *p)
{
Rune rune;
int i = 0;
while (s < p) {
if (*(unsigned char *)s < Runeself)
++s;
else
s += chartorune(&rune, s);
++i;
}
return i;
}
static void jsB_new_String(js_State *J, unsigned int argc)
{
js_newstring(J, js_isdefined(J, 1) ? js_tostring(J, 1) : "");
}
static void jsB_String(js_State *J, unsigned int argc)
{
js_pushliteral(J, js_isdefined(J, 1) ? js_tostring(J, 1) : "");
}
static void Sp_toString(js_State *J, unsigned int argc)
{
js_Object *self = js_toobject(J, 0);
if (self->type != JS_CSTRING) js_typeerror(J, "not a string");
js_pushliteral(J, self->u.s.string);
}
static void Sp_valueOf(js_State *J, unsigned int argc)
{
js_Object *self = js_toobject(J, 0);
if (self->type != JS_CSTRING) js_typeerror(J, "not a string");
js_pushliteral(J, self->u.s.string);
}
static void Sp_charAt(js_State *J, unsigned int argc)
{
char buf[UTFmax + 1];
const char *s = js_tostring(J, 0);
int pos = js_tointeger(J, 1);
Rune rune = js_runeat(J, s, pos);
if (rune > 0) {
buf[runetochar(buf, &rune)] = 0;
js_pushstring(J, buf);
} else {
js_pushliteral(J, "");
}
}
static void Sp_charCodeAt(js_State *J, unsigned int argc)
{
const char *s = js_tostring(J, 0);
int pos = js_tointeger(J, 1);
Rune rune = js_runeat(J, s, pos);
if (rune > 0)
js_pushnumber(J, rune);
else
js_pushnumber(J, NAN);
}
static void Sp_concat(js_State *J, unsigned int argc)
{
char * volatile out;
const char *s;
unsigned int i, n;
if (argc == 0)
return;
s = js_tostring(J, 0);
n = strlen(s);
out = malloc(n + 1);
strcpy(out, s);
if (js_try(J)) {
free(out);
js_throw(J);
}
for (i = 1; i <= argc; ++i) {
s = js_tostring(J, i);
n += strlen(s);
out = realloc(out, n + 1);
strcat(out, s);
}
js_pushstring(J, out);
js_endtry(J);
free(out);
}
static void Sp_indexOf(js_State *J, unsigned int argc)
{
const char *haystack = js_tostring(J, 0);
const char *needle = js_tostring(J, 1);
int pos = js_tointeger(J, 2);
int len = strlen(needle);
int k = 0;
Rune rune;
while (*haystack) {
if (k >= pos && !strncmp(haystack, needle, len)) {
js_pushnumber(J, k);
return;
}
haystack += chartorune(&rune, haystack);
++k;
}
js_pushnumber(J, -1);
}
static void Sp_lastIndexOf(js_State *J, unsigned int argc)
{
const char *haystack = js_tostring(J, 0);
const char *needle = js_tostring(J, 1);
int pos = js_isdefined(J, 2) ? js_tointeger(J, 2) : strlen(haystack);
int len = strlen(needle);
int k = 0, last = -1;
Rune rune;
while (*haystack && k <= pos) {
if (!strncmp(haystack, needle, len))
last = k;
haystack += chartorune(&rune, haystack);
++k;
}
js_pushnumber(J, last);
}
static void Sp_localeCompare(js_State *J, unsigned int argc)
{
const char *a = js_tostring(J, 0);
const char *b = js_tostring(J, 1);
js_pushnumber(J, strcmp(a, b));
}
static void Sp_slice(js_State *J, unsigned int argc)
{
const char *str = js_tostring(J, 0);
const char *ss, *ee;
int len = utflen(str);
int s = js_tointeger(J, 1);
int e = js_isdefined(J, 2) ? js_tointeger(J, 2) : len;
s = s < 0 ? s + len : s;
e = e < 0 ? e + len : e;
s = s < 0 ? 0 : s > len ? len : s;
e = e < 0 ? 0 : e > len ? len : e;
if (s < e) {
ss = js_utfidxtoptr(str, s);
ee = js_utfidxtoptr(ss, e - s);
} else {
ss = js_utfidxtoptr(str, e);
ee = js_utfidxtoptr(ss, s - e);
}
js_pushlstring(J, ss, ee - ss);
}
static void Sp_substring(js_State *J, unsigned int argc)
{
const char *str = js_tostring(J, 0);
const char *ss, *ee;
int len = utflen(str);
int s = js_tointeger(J, 1);
int e = js_isdefined(J, 2) ? js_tointeger(J, 2) : len;
s = s < 0 ? 0 : s > len ? len : s;
e = e < 0 ? 0 : e > len ? len : e;
if (s < e) {
ss = js_utfidxtoptr(str, s);
ee = js_utfidxtoptr(ss, e - s);
} else {
ss = js_utfidxtoptr(str, e);
ee = js_utfidxtoptr(ss, s - e);
}
js_pushlstring(J, ss, ee - ss);
}
static void Sp_toLowerCase(js_State *J, unsigned int argc)
{
const char *src = js_tostring(J, 0);
char *dst = malloc(UTFmax * strlen(src) + 1);
const char *s = src;
char *d = dst;
Rune rune;
while (*s) {
s += chartorune(&rune, s);
rune = tolowerrune(rune);
d += runetochar(d, &rune);
}
if (js_try(J)) {
free(dst);
js_throw(J);
}
js_pushstring(J, dst);
js_endtry(J);
free(dst);
}
static void Sp_toUpperCase(js_State *J, unsigned int argc)
{
const char *src = js_tostring(J, 0);
char *dst = malloc(UTFmax * strlen(src) + 1);
const char *s = src;
char *d = dst;
Rune rune;
while (*s) {
s += chartorune(&rune, s);
rune = toupperrune(rune);
d += runetochar(d, &rune);
}
if (js_try(J)) {
free(dst);
js_throw(J);
}
js_pushstring(J, dst);
js_endtry(J);
free(dst);
}
static int istrim(int c)
{
return c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0 || c == 0xFEFF ||
c == 0xA || c == 0xD || c == 0x2028 || c == 0x2029;
}
static void Sp_trim(js_State *J, unsigned int argc)
{
const char *s, *e;
s = js_tostring(J, 0);
while (istrim(*s))
++s;
e = s + strlen(s);
while (e > s && istrim(e[-1]))
--e;
js_pushlstring(J, s, e - s);
}
static void S_fromCharCode(js_State *J, unsigned int argc)
{
unsigned int i;
Rune c;
char *s, *p;
s = p = malloc(argc * UTFmax + 1);
if (js_try(J)) {
free(s);
js_throw(J);
}
for (i = 1; i <= argc; ++i) {
c = js_tointeger(J, i); // TODO: ToUInt16()
p += runetochar(p, &c);
}
*p = 0;
js_pushstring(J, s);
js_endtry(J);
free(s);
}
static void Sp_match(js_State *J, unsigned int argc)
{
js_Regexp *re;
Resub m[10];
const char *text;
unsigned int len;
const char *a, *b, *c, *e;
text = js_tostring(J, 0);
if (js_isregexp(J, 1))
js_copy(J, 1);
else if (js_isundefined(J, 1))
js_newregexp(J, "", 0);
else
js_newregexp(J, js_tostring(J, 1), 0);
re = js_toregexp(J, -1);
if (!(re->flags & JS_REGEXP_G)) {
js_RegExp_prototype_exec(J, re, text);
return;
}
re->last = 0;
js_newarray(J);
len = 0;
a = text;
e = text + strlen(text);
while (a <= e) {
if (js_regexec(re->prog, a, nelem(m), m, a > text ? REG_NOTBOL : 0))
break;
b = m[0].sp;
c = m[0].ep;
js_pushlstring(J, b, c - b);
js_setindex(J, -2, len++);
a = c;
if (c - b == 0)
++a;
}
}
static void Sp_search(js_State *J, unsigned int argc)
{
js_Regexp *re;
Resub m[10];
const char *text;
text = js_tostring(J, 0);
if (js_isregexp(J, 1))
js_copy(J, 1);
else if (js_isundefined(J, 1))
js_newregexp(J, "", 0);
else
js_newregexp(J, js_tostring(J, 1), 0);
re = js_toregexp(J, -1);
if (!js_regexec(re->prog, text, nelem(m), m, 0))
js_pushnumber(J, js_utfptrtoidx(text, m[0].sp));
else
js_pushnumber(J, -1);
}
static void Sp_replace_regexp(js_State *J, unsigned int argc)
{
js_Regexp *re;
Resub m[10];
const char *source, *s, *r;
js_Buffer *sb = NULL;
int n, x;
source = js_tostring(J, 0);
re = js_toregexp(J, 1);
if (js_regexec(re->prog, source, nelem(m), m, 0)) {
js_copy(J, 0);
return;
}
re->last = 0;
loop:
s = m[0].sp;
n = m[0].ep - m[0].sp;
if (js_iscallable(J, 2)) {
js_copy(J, 2);
js_pushglobal(J);
for (x = 0; m[x].sp; ++x) /* arg 0..x: substring and subexps that matched */
js_pushlstring(J, m[x].sp, m[x].ep - m[x].sp);
js_pushnumber(J, s - source); /* arg x+2: offset within search string */
js_copy(J, 0); /* arg x+3: search string */
js_call(J, 2 + x);
r = js_tostring(J, -1);
sb_putm(&sb, source, s);
sb_puts(&sb, r);
js_pop(J, 1);
} else {
r = js_tostring(J, 2);
sb_putm(&sb, source, s);
while (*r) {
if (*r == '$') {
switch (*(++r)) {
case '$': sb_putc(&sb, '$'); break;
case '`': sb_putm(&sb, source, s); break;
case '\'': sb_puts(&sb, s + n); break;
case '&':
sb_putm(&sb, s, s + n);
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
x = *r - '0';
if (m[x].sp) {
sb_putm(&sb, m[x].sp, m[x].ep);
} else {
sb_putc(&sb, '$');
sb_putc(&sb, '0'+x);
}
break;
default:
sb_putc(&sb, '$');
sb_putc(&sb, *r);
break;
}
++r;
} else {
sb_putc(&sb, *r++);
}
}
}
if (re->flags & JS_REGEXP_G) {
source = m[0].ep;
if (n == 0) {
if (*source)
sb_putc(&sb, *source++);
else
goto end;
}
if (!js_regexec(re->prog, source, nelem(m), m, REG_NOTBOL))
goto loop;
}
end:
sb_puts(&sb, s + n);
sb_putc(&sb, 0);
if (js_try(J)) {
free(sb);
js_throw(J);
}
js_pushstring(J, sb ? sb->s : "");
js_endtry(J);
free(sb);
}
static void Sp_replace_string(js_State *J, unsigned int argc)
{
const char *source, *needle, *s, *r;
js_Buffer *sb = NULL;
int n;
source = js_tostring(J, 0);
needle = js_tostring(J, 1);
s = strstr(source, needle);
if (!s) {
js_copy(J, 0);
return;
}
n = strlen(needle);
if (js_iscallable(J, 2)) {
js_copy(J, 2);
js_pushglobal(J);
js_pushlstring(J, s, n); /* arg 1: substring that matched */
js_pushnumber(J, s - source); /* arg 2: offset within search string */
js_copy(J, 0); /* arg 3: search string */
js_call(J, 3);
r = js_tostring(J, -1);
sb_putm(&sb, source, s);
sb_puts(&sb, r);
sb_puts(&sb, s + n);
sb_putc(&sb, 0);
js_pop(J, 1);
} else {
r = js_tostring(J, 2);
sb_putm(&sb, source, s);
while (*r) {
if (*r == '$') {
switch (*(++r)) {
case '$': sb_putc(&sb, '$'); break;
case '&': sb_putm(&sb, s, s + n); break;
case '`': sb_putm(&sb, source, s); break;
case '\'': sb_puts(&sb, s + n); break;
default: sb_putc(&sb, '$'); sb_putc(&sb, *r); break;
}
++r;
} else {
sb_putc(&sb, *r++);
}
}
sb_puts(&sb, s + n);
sb_putc(&sb, 0);
}
if (js_try(J)) {
free(sb);
js_throw(J);
}
js_pushstring(J, sb ? sb->s : "");
js_endtry(J);
free(sb);
}
static void Sp_replace(js_State *J, unsigned int argc)
{
if (js_isregexp(J, 1))
Sp_replace_regexp(J, argc);
else
Sp_replace_string(J, argc);
}
static void Sp_split_regexp(js_State *J, unsigned int argc)
{
js_Regexp *re;
Resub m[10];
const char *text;
unsigned int limit, len, k;
const char *p, *a, *b, *c, *e;
text = js_tostring(J, 0);
re = js_toregexp(J, 1);
limit = js_isdefined(J, 2) ? js_touint32(J, 2) : 1 << 30;
js_newarray(J);
len = 0;
e = text + strlen(text);
/* splitting the empty string */
if (e == 0) {
if (js_regexec(re->prog, text, nelem(m), m, 0)) {
if (len == limit) return;
js_pushliteral(J, "");
js_setindex(J, -2, 0);
}
return;
}
p = a = text;
while (a < e) {
if (js_regexec(re->prog, a, nelem(m), m, a > text ? REG_NOTBOL : 0))
break; /* no match */
b = m[0].sp;
c = m[0].ep;
/* empty string at end of last match */
if (b == p) {
++a;
continue;
}
if (len == limit) return;
js_pushlstring(J, p, b - p);
js_setindex(J, -2, len++);
for (k = 1; k < nelem(m) && m[k].sp; ++k) {
if (len == limit) return;
js_pushlstring(J, m[k].sp, m[k].ep - m[k].sp);
js_setindex(J, -2, len++);
}
a = p = c;
}
if (len == limit) return;
js_pushstring(J, p);
js_setindex(J, -2, len);
}
static void Sp_split_string(js_State *J, unsigned int argc)
{
const char *str = js_tostring(J, 0);
const char *sep = js_tostring(J, 1);
unsigned int limit = js_isdefined(J, 2) ? js_touint32(J, 2) : 1 << 30;
unsigned int i, n;
js_newarray(J);
n = strlen(sep);
/* empty string */
if (n == 0) {
Rune rune;
for (i = 0; *str && i < limit; ++i) {
n = chartorune(&rune, str);
js_pushlstring(J, str, n);
js_setindex(J, -2, i);
str += n;
}
return;
}
for (i = 0; str && i < limit; ++i) {
const char *s = strstr(str, sep);
if (s) {
js_pushlstring(J, str, s-str);
js_setindex(J, -2, i);
str = s + n;
} else {
js_pushstring(J, str);
js_setindex(J, -2, i);
str = NULL;
}
}
}
static void Sp_split(js_State *J, unsigned int argc)
{
if (js_isundefined(J, 1)) {
js_newarray(J);
js_copy(J, 0);
js_setindex(J, -2, 0);
} else if (js_isregexp(J, 1)) {
Sp_split_regexp(J, argc);
} else {
Sp_split_string(J, argc);
}
}
void jsB_initstring(js_State *J)
{
J->String_prototype->u.s.string = "";
J->String_prototype->u.s.length = 0;
js_pushobject(J, J->String_prototype);
{
jsB_propf(J, "toString", Sp_toString, 0);
jsB_propf(J, "valueOf", Sp_valueOf, 0);
jsB_propf(J, "charAt", Sp_charAt, 1);
jsB_propf(J, "charCodeAt", Sp_charCodeAt, 1);
jsB_propf(J, "concat", Sp_concat, 1);
jsB_propf(J, "indexOf", Sp_indexOf, 1);
jsB_propf(J, "lastIndexOf", Sp_lastIndexOf, 1);
jsB_propf(J, "localeCompare", Sp_localeCompare, 1);
jsB_propf(J, "match", Sp_match, 1);
jsB_propf(J, "replace", Sp_replace, 2);
jsB_propf(J, "search", Sp_search, 1);
jsB_propf(J, "slice", Sp_slice, 2);
jsB_propf(J, "split", Sp_split, 2);
jsB_propf(J, "substring", Sp_substring, 2);
jsB_propf(J, "toLowerCase", Sp_toLowerCase, 0);
jsB_propf(J, "toLocaleLowerCase", Sp_toLowerCase, 0);
jsB_propf(J, "toUpperCase", Sp_toUpperCase, 0);
jsB_propf(J, "toLocaleUpperCase", Sp_toUpperCase, 0);
/* ES5 */
jsB_propf(J, "trim", Sp_trim, 0);
}
js_newcconstructor(J, jsB_String, jsB_new_String, 1);
{
jsB_propf(J, "fromCharCode", S_fromCharCode, 1);
}
js_defglobal(J, "String", JS_DONTENUM);
}