diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/util/charset/iconv.c | 73 |
1 files changed, 69 insertions, 4 deletions
diff --git a/lib/util/charset/iconv.c b/lib/util/charset/iconv.c index 16ce92ea82b..64e345a7c16 100644 --- a/lib/util/charset/iconv.c +++ b/lib/util/charset/iconv.c @@ -56,6 +56,7 @@ static_decl_charset; static size_t ascii_pull (void *,const char **, size_t *, char **, size_t *); static size_t ascii_push (void *,const char **, size_t *, char **, size_t *); +static size_t latin1_pull(void *,const char **, size_t *, char **, size_t *); static size_t latin1_push(void *,const char **, size_t *, char **, size_t *); static size_t utf8_pull (void *,const char **, size_t *, char **, size_t *); static size_t utf8_push (void *,const char **, size_t *, char **, size_t *); @@ -81,7 +82,7 @@ static const struct charset_functions builtin_functions[] = { {"ASCII", ascii_pull, ascii_push}, {"646", ascii_pull, ascii_push}, - {"ISO-8859-1", ascii_pull, latin1_push}, + {"ISO-8859-1", latin1_pull, latin1_push}, {"UCS2-HEX", ucs2hex_pull, ucs2hex_push} }; @@ -373,10 +374,24 @@ _PUBLIC_ int smb_iconv_close(smb_iconv_t cd) and also the "test" character sets that are designed to test multi-byte character set support for english users ***********************************************************************/ + +/* + this takes an ASCII sequence and produces a UTF16 sequence + + The first 127 codepoints of latin1 matches the first 127 codepoints + of unicode, and so can be put into the first byte of UTF16LE + + */ + static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) { while (*inbytesleft >= 1 && *outbytesleft >= 2) { + if (((*inbuf)[0] & 0x7F) != (*inbuf)[0]) { + /* If this is multi-byte, then it isn't legal ASCII */ + errno = EILSEQ; + return -1; + } (*outbuf)[0] = (*inbuf)[0]; (*outbuf)[1] = 0; (*inbytesleft) -= 1; @@ -393,14 +408,26 @@ static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft, return 0; } +/* + this takes a UTF16 sequence and produces an ASCII sequence + + The first 127 codepoints of ASCII matches the first 127 codepoints + of unicode, and so can be read directly from the first byte of UTF16LE + + */ static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) { int ir_count=0; while (*inbytesleft >= 2 && *outbytesleft >= 1) { - (*outbuf)[0] = (*inbuf)[0] & 0x7F; - if ((*inbuf)[1]) ir_count++; + if (((*inbuf)[0] & 0x7F) != (*inbuf)[0] || + (*inbuf)[1] != 0) { + /* If this is multi-byte, then it isn't legal ASCII */ + errno = EILSEQ; + return -1; + } + (*outbuf)[0] = (*inbuf)[0]; (*inbytesleft) -= 2; (*outbytesleft) -= 1; (*inbuf) += 2; @@ -420,6 +447,40 @@ static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft, return ir_count; } +/* + this takes a latin1/ISO-8859-1 sequence and produces a UTF16 sequence + + The first 256 codepoints of latin1 matches the first 256 codepoints + of unicode, and so can be put into the first byte of UTF16LE + + */ +static size_t latin1_pull(void *cd, const char **inbuf, size_t *inbytesleft, + char **outbuf, size_t *outbytesleft) +{ + while (*inbytesleft >= 1 && *outbytesleft >= 2) { + (*outbuf)[0] = (*inbuf)[0]; + (*outbuf)[1] = 0; + (*inbytesleft) -= 1; + (*outbytesleft) -= 2; + (*inbuf) += 1; + (*outbuf) += 2; + } + + if (*inbytesleft > 0) { + errno = E2BIG; + return -1; + } + + return 0; +} + +/* + this takes a UTF16 sequence and produces a latin1/ISO-8859-1 sequence + + The first 256 codepoints of latin1 matches the first 256 codepoints + of unicode, and so can be read directly from the first byte of UTF16LE + + */ static size_t latin1_push(void *cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) { @@ -427,7 +488,11 @@ static size_t latin1_push(void *cd, const char **inbuf, size_t *inbytesleft, while (*inbytesleft >= 2 && *outbytesleft >= 1) { (*outbuf)[0] = (*inbuf)[0]; - if ((*inbuf)[1]) ir_count++; + if ((*inbuf)[1] != 0) { + /* If this is multi-byte, then it isn't legal latin1 */ + errno = EILSEQ; + return -1; + } (*inbytesleft) -= 2; (*outbytesleft) -= 1; (*inbuf) += 2; |