ref: 63143d8341e1f233332c7f7a00aa02e1cf5ae6b7
dir: /jsstring.c/
#include "jsi.h"
#include "jsvalue.h"
#include "jsbuiltin.h"
#include "utf.h"
static int jsB_new_String(js_State *J, int argc)
{
js_newstring(J, argc > 0 ? js_tostring(J, 1) : "");
return 1;
}
static int jsB_String(js_State *J, int argc)
{
js_pushliteral(J, argc > 0 ? js_tostring(J, 1) : "");
return 1;
}
static int Sp_toString(js_State *J, 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.string);
return 1;
}
static int Sp_valueOf(js_State *J, 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.string);
return 1;
}
static inline Rune runeAt(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;
}
static inline const char *utfindex(const char *s, int i)
{
Rune rune = 0;
while (i-- > 0) {
rune = *(unsigned char*)s;
if (rune < Runeself) {
if (rune == 0)
return NULL;
++s;
} else
s += chartorune(&rune, s);
}
return s;
}
static int Sp_charAt(js_State *J, int argc)
{
char buf[UTFmax + 1];
const char *s = js_tostring(J, 0);
int pos = js_tointeger(J, 1);
Rune rune = runeAt(s, pos);
if (rune > 0) {
buf[runetochar(buf, &rune)] = 0;
js_pushstring(J, buf);
} else {
js_pushliteral(J, "");
}
return 1;
}
static int Sp_charCodeAt(js_State *J, int argc)
{
const char *s = js_tostring(J, 0);
int pos = js_tointeger(J, 1);
Rune rune = runeAt(s, pos);
if (rune > 0)
js_pushnumber(J, rune);
else
js_pushnumber(J, NAN);
return 1;
}
static int Sp_concat(js_State *J, int argc)
{
char * volatile out;
const char *s;
int i, n;
if (argc == 0)
return 1;
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);
return 1;
}
static int Sp_indexOf(js_State *J, 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 1;
}
haystack += chartorune(&rune, haystack);
++k;
}
js_pushnumber(J, -1);
return 1;
}
static int Sp_lastIndexOf(js_State *J, int argc)
{
const char *haystack = js_tostring(J, 0);
const char *needle = js_tostring(J, 1);
int pos = argc > 1 ? 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);
return 1;
}
static int Sp_localeCompare(js_State *J, int argc)
{
const char *a = js_tostring(J, 0);
const char *b = js_tostring(J, 1);
return strcmp(a, b);
}
static char *substr(js_State *J, const char *src, int a, int b)
{
int n = b - a;
const char *s = utfindex(src, a);
char *dst = malloc(UTFmax * n + 1), *d = dst;
while (n--) {
Rune rune;
s += chartorune(&rune, s);
d += runetochar(d, &rune);
}
*d = 0;
return dst;
}
static int Sp_slice(js_State *J, int argc)
{
const char *str = js_tostring(J, 0);
int len = utflen(str);
int s = js_tointeger(J, 1);
int e = argc > 1 ? js_tointeger(J, 2) : len;
char *out;
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)
out = substr(J, str, s, e);
else
out = substr(J, str, e, s);
if (js_try(J)) {
free(out);
js_throw(J);
}
js_pushstring(J, out);
js_endtry(J);
return 1;
}
static int Sp_substring(js_State *J, int argc)
{
const char *str = js_tostring(J, 0);
int len = utflen(str);
int s = js_tointeger(J, 1);
int e = argc > 1 ? js_tointeger(J, 2) : len;
char *out;
s = s < 0 ? 0 : s > len ? len : s;
e = e < 0 ? 0 : e > len ? len : e;
if (s < e)
out = substr(J, str, s, e);
else
out = substr(J, str, e, s);
if (js_try(J)) {
free(out);
js_throw(J);
}
js_pushstring(J, out);
js_endtry(J);
return 1;
}
static int Sp_toLowerCase(js_State *J, 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);
return 1;
}
static int Sp_toUpperCase(js_State *J, 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);
return 1;
}
static int S_fromCharCode(js_State *J, int argc)
{
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);
return 1;
}
void jsB_initstring(js_State *J)
{
J->String_prototype->u.string = "";
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, "slice", Sp_slice, 2);
// match (uses regexp)
// replace (uses regexp)
// search (uses regexp)
// split (uses regexp)
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);
// trim (ES5)
}
js_newcconstructor(J, jsB_String, jsB_new_String, 1);
{
jsB_propf(J, "fromCharCode", S_fromCharCode, 1);
}
js_defglobal(J, "String", JS_DONTENUM);
}