Mirrors_Framework/mujs
1
0
Fork 0
mirror of https://github.com/ccxvii/mujs.git synced 2026-02-06 01:41:37 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Implement substring and slice.

Browse Source
This commit is contained in:
Tor Andersson
2014-01-27 13:08:24 +01:00
parent 489365dcf3
commit b1c99267f0
1 changed files with 87 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
jsstring.c
View File

@@ -46,6 +46,21 @@ static inline Rune runeAt(const char *s, int i)
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];
@@ -109,7 +124,7 @@ 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 = argc > 1 ? js_tointeger(J, 2) : 0;
int pos = js_tointeger(J, 2);
int len = strlen(needle);
int k = 0;
Rune rune;
@@ -133,7 +148,7 @@ static int Sp_lastIndexOf(js_State *J, int argc)
int len = strlen(needle);
int k = 0, last = -1;
Rune rune;
if (argc > 1 && !js_isundefined(J, 2))
if (!js_isundefined(J, 2))
pos = js_tointeger(J, 2);
while (*haystack && k <= pos) {
if (!strncmp(haystack, needle, len))
@@ -152,6 +167,73 @@ static int Sp_localeCompare(js_State *J, int argc)
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 = !js_isundefined(J, 2) ? 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 = !js_isundefined(J, 2) ? 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);
@@ -235,16 +317,17 @@ void jsB_initstring(js_State *J)
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);
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, "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);
{