diff options
Diffstat (limited to 'libc/stdlib/stdlib.c')
| -rw-r--r-- | libc/stdlib/stdlib.c | 64 |
1 files changed, 49 insertions, 15 deletions
diff --git a/libc/stdlib/stdlib.c b/libc/stdlib/stdlib.c index 15292ceed..68796656a 100644 --- a/libc/stdlib/stdlib.c +++ b/libc/stdlib/stdlib.c @@ -929,6 +929,30 @@ size_t _stdlib_mb_cur_max(void) libc_hidden_def(_stdlib_mb_cur_max) #endif + +#ifdef __UCLIBC_HAS_LOCALE__ +/* + * The following function return 1 if the encoding is stateful, 0 if stateless. + * To note, until now all the supported encoding are stateless. + */ + +static inline int is_stateful(unsigned char encoding) +{ + switch (encoding) + { + case __ctype_encoding_7_bit: + case __ctype_encoding_utf8: + case __ctype_encoding_8_bit: + return 0; + default: + assert(0); + return -1; + } +} +#else +#define is_stateful(encoding) 0 +#endif + /**********************************************************************/ #ifdef L_mblen @@ -941,13 +965,17 @@ int mblen(register const char *s, size_t n) if (!s) { state.__mask = 0; -#ifdef __CTYPE_HAS_UTF_8_LOCALES - return ENCODING == __ctype_encoding_utf8; -#else - return 0; -#endif + /* + In this case we have to return 0 because the only multibyte supported encoding + is utf-8, that is a stateless encoding. See mblen() documentation. + */ + return is_stateful(ENCODING); } + if (*s == '\0') + /* According to the ISO C 89 standard this is the expected behaviour. */ + return 0; + if ((r = mbrlen(s, n, &state)) == (size_t) -2) { /* TODO: Should we set an error state? */ state.__wc = 0xffffU; /* Make sure we're in an error state. */ @@ -969,13 +997,18 @@ int mbtowc(wchar_t *__restrict pwc, register const char *__restrict s, size_t n) if (!s) { state.__mask = 0; -#ifdef __CTYPE_HAS_UTF_8_LOCALES - return ENCODING == __ctype_encoding_utf8; -#else - return 0; -#endif + /* + In this case we have to return 0 because the only multibyte supported encoding + is utf-8, that is a stateless encoding. See mbtowc() documentation. + */ + + return is_stateful(ENCODING); } + if (*s == '\0') + /* According to the ISO C 89 standard this is the expected behaviour. */ + return 0; + if ((r = mbrtowc(pwc, s, n, &state)) == (size_t) -2) { /* TODO: Should we set an error state? */ state.__wc = 0xffffU; /* Make sure we're in an error state. */ @@ -996,11 +1029,12 @@ int wctomb(register char *__restrict s, wchar_t swc) { return (!s) ? -#ifdef __CTYPE_HAS_UTF_8_LOCALES - (ENCODING == __ctype_encoding_utf8) -#else - 0 /* Encoding is stateless. */ -#endif + /* + In this case we have to return 0 because the only multibyte supported encoding + is utf-8, that is a stateless encoding. See wctomb() documentation. + */ + + is_stateful(ENCODING) : ((ssize_t) wcrtomb(s, swc, NULL)); } |