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Diffstat (limited to 'system/lib/libc/musl/src/locale/iconv.c')
-rw-r--r--system/lib/libc/musl/src/locale/iconv.c454
1 files changed, 454 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/locale/iconv.c b/system/lib/libc/musl/src/locale/iconv.c
new file mode 100644
index 00000000..a0b02320
--- /dev/null
+++ b/system/lib/libc/musl/src/locale/iconv.c
@@ -0,0 +1,454 @@
+#include <iconv.h>
+#include <errno.h>
+#include <wchar.h>
+#include <string.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <stdint.h>
+
+#define UTF_32BE 0300
+#define UTF_16LE 0301
+#define UTF_16BE 0302
+#define UTF_32LE 0303
+#define UCS2BE 0304
+#define UCS2LE 0305
+#define WCHAR_T 0306
+#define US_ASCII 0307
+#define UTF_8 0310
+#define EUC_JP 0320
+#define SHIFT_JIS 0321
+#define GB18030 0330
+#define GBK 0331
+#define GB2312 0332
+#define BIG5 0340
+#define EUC_KR 0350
+
+/* FIXME: these are not implemented yet
+ * EUC: A1-FE A1-FE
+ * GBK: 81-FE 40-7E,80-FE
+ * Big5: A1-FE 40-7E,A1-FE
+ */
+
+/* Definitions of charmaps. Each charmap consists of:
+ * 1. Empty-string-terminated list of null-terminated aliases.
+ * 2. Special type code or number of elided entries.
+ * 3. Character table (size determined by field 2). */
+
+static const unsigned char charmaps[] =
+"utf8\0\0\310"
+"wchart\0\0\306"
+"ucs2\0ucs2be\0\0\304"
+"ucs2le\0\0\305"
+"utf16\0utf16be\0\0\302"
+"utf16le\0\0\301"
+"ucs4\0ucs4be\0utf32\0utf32be\0\0\300"
+"ucs4le\0utf32le\0\0\303"
+"ascii\0usascii\0iso646\0iso646us\0\0\307"
+"eucjp\0\0\320"
+"shiftjis\0sjis\0\0\321"
+"gb18030\0\0\330"
+"gbk\0\0\331"
+"gb2312\0\0\332"
+"big5\0bigfive\0cp950\0big5hkscs\0\0\340"
+"euckr\0ksc5601\0ksx1001\0cp949\0\0\350"
+#include "codepages.h"
+;
+
+static const unsigned short legacy_chars[] = {
+#include "legacychars.h"
+};
+
+static const unsigned short jis0208[84][94] = {
+#include "jis0208.h"
+};
+
+static const unsigned short gb18030[126][190] = {
+#include "gb18030.h"
+};
+
+static const unsigned short big5[89][157] = {
+#include "big5.h"
+};
+
+static const unsigned short hkscs[] = {
+#include "hkscs.h"
+};
+
+static const unsigned short ksc[93][94] = {
+#include "ksc.h"
+};
+
+static int fuzzycmp(const unsigned char *a, const unsigned char *b)
+{
+ for (; *a && *b; a++, b++) {
+ while (*a && (*a|32U)-'a'>26 && *a-'0'>10U) a++;
+ if ((*a|32U) != *b) return 1;
+ }
+ return *a != *b;
+}
+
+static size_t find_charmap(const void *name)
+{
+ const unsigned char *s;
+ for (s=charmaps; *s; ) {
+ if (!fuzzycmp(name, s)) {
+ for (; *s; s+=strlen((void *)s)+1);
+ return s+1-charmaps;
+ }
+ s += strlen((void *)s)+1;
+ if (!*s) {
+ if (s[1] > 0200) s+=2;
+ else s+=2+(128U-s[1])/4*5;
+ }
+ }
+ return -1;
+}
+
+iconv_t iconv_open(const char *to, const char *from)
+{
+ size_t f, t;
+
+ if ((t = find_charmap(to))==-1
+ || (f = find_charmap(from))==-1
+ || (charmaps[t] >= 0320)) {
+ errno = EINVAL;
+ return (iconv_t)-1;
+ }
+
+ return (void *)(f<<16 | t);
+}
+
+int iconv_close(iconv_t cd)
+{
+ return 0;
+}
+
+static unsigned get_16(const unsigned char *s, int e)
+{
+ e &= 1;
+ return s[e]<<8 | s[1-e];
+}
+
+static void put_16(unsigned char *s, unsigned c, int e)
+{
+ e &= 1;
+ s[e] = c>>8;
+ s[1-e] = c;
+}
+
+static unsigned get_32(const unsigned char *s, int e)
+{
+ e &= 3;
+ return s[e]+0U<<24 | s[e^1]<<16 | s[e^2]<<8 | s[e^3];
+}
+
+static void put_32(unsigned char *s, unsigned c, int e)
+{
+ e &= 3;
+ s[e^0] = c>>24;
+ s[e^1] = c>>16;
+ s[e^2] = c>>8;
+ s[e^3] = c;
+}
+
+/* Adapt as needed */
+#define mbrtowc_utf8 mbrtowc
+#define wctomb_utf8 wctomb
+
+size_t iconv(iconv_t cd0, char **restrict in, size_t *restrict inb, char **restrict out, size_t *restrict outb)
+{
+ size_t x=0;
+ unsigned long cd = (unsigned long)cd0;
+ unsigned to = cd & 0xffff;
+ unsigned from = cd >> 16;
+ const unsigned char *map = charmaps+from+1;
+ const unsigned char *tomap = charmaps+to+1;
+ mbstate_t st = {0};
+ wchar_t wc;
+ unsigned c, d;
+ size_t k, l;
+ int err;
+ unsigned char type = map[-1];
+ unsigned char totype = tomap[-1];
+
+ if (!in || !*in || !*inb) return 0;
+
+ for (; *inb; *in+=l, *inb-=l) {
+ c = *(unsigned char *)*in;
+ l = 1;
+
+ if (c >= 128 || type-UTF_32BE < 7U) switch (type) {
+ case UTF_8:
+ l = mbrtowc_utf8(&wc, *in, *inb, &st);
+ if (!l) l++;
+ else if (l == (size_t)-1) goto ilseq;
+ else if (l == (size_t)-2) goto starved;
+ c = wc;
+ break;
+ case US_ASCII:
+ goto ilseq;
+ case WCHAR_T:
+ l = sizeof(wchar_t);
+ if (*inb < l) goto starved;
+ c = *(wchar_t *)*in;
+ if (0) {
+ case UTF_32BE:
+ case UTF_32LE:
+ l = 4;
+ if (*inb < 4) goto starved;
+ c = get_32((void *)*in, type);
+ }
+ if (c-0xd800u < 0x800u || c >= 0x110000u) goto ilseq;
+ break;
+ case UCS2BE:
+ case UCS2LE:
+ case UTF_16BE:
+ case UTF_16LE:
+ l = 2;
+ if (*inb < 2) goto starved;
+ c = get_16((void *)*in, type);
+ if ((unsigned)(c-0xdc00) < 0x400) goto ilseq;
+ if ((unsigned)(c-0xd800) < 0x400) {
+ if (type-UCS2BE < 2U) goto ilseq;
+ l = 4;
+ if (*inb < 4) goto starved;
+ d = get_16((void *)(*in + 2), type);
+ if ((unsigned)(d-0xdc00) >= 0x400) goto ilseq;
+ c = ((c-0xd7c0)<<10) + (d-0xdc00);
+ }
+ break;
+ case SHIFT_JIS:
+ if (c-0xa1 <= 0xdf-0xa1) {
+ c += 0xff61-0xa1;
+ break;
+ }
+ l = 2;
+ if (*inb < 2) goto starved;
+ d = *((unsigned char *)*in + 1);
+ if (c-129 <= 159-129) c -= 129;
+ else if (c-224 <= 239-224) c -= 193;
+ else goto ilseq;
+ c *= 2;
+ if (d-64 <= 158-64) {
+ if (d==127) goto ilseq;
+ if (d>127) d--;
+ d -= 64;
+ } else if (d-159 <= 252-159) {
+ c++;
+ d -= 159;
+ }
+ c = jis0208[c][d];
+ if (!c) goto ilseq;
+ break;
+ case EUC_JP:
+ l = 2;
+ if (*inb < 2) goto starved;
+ d = *((unsigned char *)*in + 1);
+ if (c==0x8e) {
+ c = d;
+ if (c-0xa1 > 0xdf-0xa1) goto ilseq;
+ c += 0xff61 - 0xa1;
+ break;
+ }
+ c -= 0xa1;
+ d -= 0xa1;
+ if (c >= 84 || d >= 94) goto ilseq;
+ c = jis0208[c][d];
+ if (!c) goto ilseq;
+ break;
+ case GB2312:
+ if (c < 0xa1) goto ilseq;
+ case GBK:
+ case GB18030:
+ c -= 0x81;
+ if (c >= 126) goto ilseq;
+ l = 2;
+ if (*inb < 2) goto starved;
+ d = *((unsigned char *)*in + 1);
+ if (d < 0xa1 && type == GB2312) goto ilseq;
+ if (d-0x40>=191 || d==127) {
+ if (d-'0'>9 || type != GB18030)
+ goto ilseq;
+ l = 4;
+ if (*inb < 4) goto starved;
+ c = (10*c + d-'0') * 1260;
+ d = *((unsigned char *)*in + 2);
+ if (d-0x81>126) goto ilseq;
+ c += 10*(d-0x81);
+ d = *((unsigned char *)*in + 3);
+ if (d-'0'>9) goto ilseq;
+ c += d-'0';
+ c += 128;
+ for (d=0; d<=c; ) {
+ k = 0;
+ for (int i=0; i<126; i++)
+ for (int j=0; j<190; j++)
+ if (gb18030[i][j]-d <= c-d)
+ k++;
+ d = c+1;
+ c += k;
+ }
+ break;
+ }
+ d -= 0x40;
+ if (d>63) d--;
+ c = gb18030[c][d];
+ break;
+ case BIG5:
+ l = 2;
+ if (*inb < 2) goto starved;
+ d = *((unsigned char *)*in + 1);
+ if (d-0x40>=0xff-0x40 || d-0x7f<0xa1-0x7f) goto ilseq;
+ d -= 0x40;
+ if (d > 0x3e) d -= 0x22;
+ if (c-0xa1>=0xfa-0xa1) {
+ if (c-0x87>=0xff-0x87) goto ilseq;
+ if (c < 0xa1) c -= 0x87;
+ else c -= 0x87 + (0xfa-0xa1);
+ c = (hkscs[4867+(c*157+d)/16]>>(c*157+d)%16)%2<<17
+ | hkscs[c*157+d];
+ /* A few HKSCS characters map to pairs of UCS
+ * characters. These are mapped to surrogate
+ * range in the hkscs table then hard-coded
+ * here. Ugly, yes. */
+ if (c/256 == 0xdc) {
+ if (totype-0300U > 8) k = 2;
+ else k = "\10\4\4\10\4\4\10\2\4"[totype-0300];
+ if (k > *outb) goto toobig;
+ x += iconv((iconv_t)(uintptr_t)to,
+ &(char *){"\303\212\314\204"
+ "\303\212\314\214"
+ "\303\252\314\204"
+ "\303\252\314\214"
+ +c%256}, &(size_t){4},
+ out, outb);
+ continue;
+ }
+ if (!c) goto ilseq;
+ break;
+ }
+ c -= 0xa1;
+ c = big5[c][d]|(c==0x27&&(d==0x3a||d==0x3c||d==0x42))<<17;
+ if (!c) goto ilseq;
+ break;
+ case EUC_KR:
+ l = 2;
+ if (*inb < 2) goto starved;
+ d = *((unsigned char *)*in + 1);
+ c -= 0xa1;
+ d -= 0xa1;
+ if (c >= 93 || d >= 94) {
+ c += (0xa1-0x81);
+ d += 0xa1;
+ if (c >= 93 || c>=0xc6-0x81 && d>0x52)
+ goto ilseq;
+ if (d-'A'<26) d = d-'A';
+ else if (d-'a'<26) d = d-'a'+26;
+ else if (d-0x81<0xff-0x81) d = d-0x81+52;
+ else goto ilseq;
+ if (c < 0x20) c = 178*c + d;
+ else c = 178*0x20 + 84*(c-0x20) + d;
+ c += 0xac00;
+ for (d=0xac00; d<=c; ) {
+ k = 0;
+ for (int i=0; i<93; i++)
+ for (int j=0; j<94; j++)
+ if (ksc[i][j]-d <= c-d)
+ k++;
+ d = c+1;
+ c += k;
+ }
+ break;
+ }
+ c = ksc[c][d];
+ if (!c) goto ilseq;
+ break;
+ default:
+ if (c < 128+type) break;
+ c -= 128+type;
+ c = legacy_chars[ map[c*5/4]>>2*c%8 |
+ map[c*5/4+1]<<8-2*c%8 & 1023 ];
+ if (!c) c = *(unsigned char *)*in;
+ if (c==1) goto ilseq;
+ }
+
+ switch (totype) {
+ case WCHAR_T:
+ if (*outb < sizeof(wchar_t)) goto toobig;
+ *(wchar_t *)*out = c;
+ *out += sizeof(wchar_t);
+ *outb -= sizeof(wchar_t);
+ break;
+ case UTF_8:
+ if (*outb < 4) {
+ char tmp[4];
+ k = wctomb_utf8(tmp, c);
+ if (*outb < k) goto toobig;
+ memcpy(*out, tmp, k);
+ } else k = wctomb_utf8(*out, c);
+ *out += k;
+ *outb -= k;
+ break;
+ case US_ASCII:
+ if (c > 0x7f) subst: x++, c='*';
+ default:
+ if (*outb < 1) goto toobig;
+ if (c < 128+totype) {
+ revout:
+ *(*out)++ = c;
+ *outb -= 1;
+ break;
+ }
+ d = c;
+ for (c=0; c<128-totype; c++) {
+ if (d == legacy_chars[ tomap[c*5/4]>>2*c%8 |
+ tomap[c*5/4+1]<<8-2*c%8 & 1023 ]) {
+ c += 128;
+ goto revout;
+ }
+ }
+ goto subst;
+ case UCS2BE:
+ case UCS2LE:
+ case UTF_16BE:
+ case UTF_16LE:
+ if (c < 0x10000 || type-UCS2BE < 2U) {
+ if (c >= 0x10000) c = 0xFFFD;
+ if (*outb < 2) goto toobig;
+ put_16((void *)*out, c, totype);
+ *out += 2;
+ *outb -= 2;
+ break;
+ }
+ if (*outb < 4) goto toobig;
+ c -= 0x10000;
+ put_16((void *)*out, (c>>10)|0xd800, totype);
+ put_16((void *)(*out + 2), (c&0x3ff)|0xdc00, totype);
+ *out += 4;
+ *outb -= 4;
+ break;
+ case UTF_32BE:
+ case UTF_32LE:
+ if (*outb < 4) goto toobig;
+ put_32((void *)*out, c, totype);
+ *out += 4;
+ *outb -= 4;
+ break;
+ }
+ }
+ return x;
+ilseq:
+ err = EILSEQ;
+ x = -1;
+ goto end;
+toobig:
+ err = E2BIG;
+ x = -1;
+ goto end;
+starved:
+ err = EINVAL;
+ x = -1;
+end:
+ errno = err;
+ return x;
+}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-21 21:07:09 +0000