From bb869741ddc3d82da02c96bef592dab6074ff142 Mon Sep 17 00:00:00 2001 From: Tim Prouty Date: Mon, 3 Mar 2008 13:32:54 -0800 Subject: Cleanup size_t return values in convert_string_allocate This patch is the first iteration of an inside-out conversion to cleanup functions in charcnv.c returning size_t == -1 to indicate failure. (This used to be commit 59124382d2894a1b194b48dd82bc5f956959eb48) --- source3/lib/charcnv.c | 134 ++++++++++++++++++++++++++++--------------------- source3/lib/util_reg.c | 6 +-- 2 files changed, 78 insertions(+), 62 deletions(-) (limited to 'source3/lib') diff --git a/source3/lib/charcnv.c b/source3/lib/charcnv.c index 69d1db0e48..81b7238763 100644 --- a/source3/lib/charcnv.c +++ b/source3/lib/charcnv.c @@ -511,9 +511,12 @@ size_t convert_string(charset_t from, charset_t to, * (this is a bad interface and needs fixing. JRA). * @param srclen length of source buffer. * @param dest always set at least to NULL + * @param converted_size set to the size of the allocated buffer on return + * true * @note -1 is not accepted for srclen. * - * @returns Size in bytes of the converted string; or -1 in case of error. + * @return True if new buffer was correctly allocated, and string was + * converted. * * Ensure the srclen contains the terminating zero. * @@ -521,8 +524,9 @@ size_t convert_string(charset_t from, charset_t to, * There has to be a cleaner way to do this. JRA. **/ -size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, - void const *src, size_t srclen, void *dst, bool allow_bad_conv) +bool convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, + void const *src, size_t srclen, void *dst, + size_t *converted_size, bool allow_bad_conv) { size_t i_len, o_len, destlen = (srclen * 3) / 2; size_t retval; @@ -533,10 +537,19 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, *dest = NULL; - if (src == NULL || srclen == (size_t)-1) - return (size_t)-1; - if (srclen == 0) - return 0; + if (!converted_size) { + errno = EINVAL; + return false; + } + + if (src == NULL || srclen == (size_t)-1) { + errno = EINVAL; + return false; + } + if (srclen == 0) { + *converted_size = 0; + return true; + } lazy_initialize_conv(); @@ -545,7 +558,8 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) { if (!conv_silent) DEBUG(0,("convert_string_allocate: Conversion not supported.\n")); - return (size_t)-1; + errno = EOPNOTSUPP; + return false; } convert: @@ -557,7 +571,8 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, DEBUG(0, ("convert_string_allocate: destlen wrapped !\n")); if (!ctx) SAFE_FREE(outbuf); - return (size_t)-1; + errno = EOPNOTSUPP; + return false; } else { destlen = destlen * 2; } @@ -571,7 +586,8 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, if (!ob) { DEBUG(0, ("convert_string_allocate: realloc failed!\n")); - return (size_t)-1; + errno = ENOMEM; + return false; } outbuf = ob; i_len = srclen; @@ -610,7 +626,7 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, } else { SAFE_FREE(ob); } - return (size_t)-1; + return false; } out: @@ -631,7 +647,8 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, if (destlen && !ob) { DEBUG(0, ("convert_string_allocate: out of memory!\n")); - return (size_t)-1; + errno = ENOMEM; + return false; } *dest = ob; @@ -640,7 +657,8 @@ size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to, ob[destlen] = '\0'; ob[destlen+1] = '\0'; - return destlen; + *converted_size = destlen; + return true; use_as_is: @@ -743,8 +761,8 @@ size_t convert_string_talloc(TALLOC_CTX *ctx, charset_t from, charset_t to, size_t dest_len; *dest = NULL; - dest_len=convert_string_allocate(ctx, from, to, src, srclen, dest, allow_bad_conv); - if (dest_len == (size_t)-1) + if (!convert_string_allocate(ctx, from, to, src, srclen, dest, + &dest_len, allow_bad_conv)) return (size_t)-1; if (*dest == NULL) return (size_t)-1; @@ -798,39 +816,28 @@ char *strdup_upper(const char *s) if (*p) { /* MB case. */ - size_t size; + size_t size, size2; smb_ucs2_t *buffer = NULL; SAFE_FREE(out_buffer); - size = convert_string_allocate(NULL, - CH_UNIX, - CH_UTF16LE, - s, - strlen(s) + 1, - (void **)(void *)&buffer, - True); - if (size == (size_t)-1) { + if (!convert_string_allocate(NULL, CH_UNIX, CH_UTF16LE, s, + strlen(s) + 1, (void **)(void *)&buffer, &size, + True)) { return NULL; } strupper_w(buffer); - size = convert_string_allocate(NULL, - CH_UTF16LE, - CH_UNIX, - buffer, - size, - (void **)(void *)&out_buffer, - True); + if (!convert_string_allocate(NULL, CH_UTF16LE, CH_UNIX, buffer, + size, (void **)(void *)&out_buffer, &size2, True)) { + TALLOC_FREE(buffer); + return NULL; + } /* Don't need the intermediate buffer * anymore. */ - TALLOC_FREE(buffer); - if (size == (size_t)-1) { - return NULL; - } } return out_buffer; @@ -904,9 +911,8 @@ size_t unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen) size_t size; smb_ucs2_t *buffer = NULL; - size = convert_string_allocate(NULL, CH_UNIX, CH_UTF16LE, src, srclen, - (void **)(void *)&buffer, True); - if (size == (size_t)-1 || !buffer) { + if (!convert_string_allocate(NULL, CH_UNIX, CH_UTF16LE, src, srclen, + (void **)(void *)&buffer, &size, True)) { smb_panic("failed to create UCS2 buffer"); } if (!strlower_w(buffer) && (dest == src)) { @@ -1077,10 +1083,14 @@ size_t push_ascii_nstring(void *dest, const char *src) size_t push_ascii_allocate(char **dest, const char *src) { - size_t src_len = strlen(src)+1; + size_t dest_len, src_len = strlen(src)+1; *dest = NULL; - return convert_string_allocate(NULL, CH_UNIX, CH_DOS, src, src_len, (void **)dest, True); + if (!convert_string_allocate(NULL, CH_UNIX, CH_DOS, src, src_len, + (void **)dest, &dest_len, True)) + return (size_t)-1; + else + return dest_len; } /** @@ -1192,17 +1202,9 @@ static size_t pull_ascii_base_talloc(TALLOC_CTX *ctx, } } - dest_len = convert_string_allocate(ctx, - CH_DOS, - CH_UNIX, - src, - src_len, - &dest, - True); - - if (dest_len == (size_t)-1) { + if (!convert_string_allocate(ctx, CH_DOS, CH_UNIX, src, src_len, &dest, + &dest_len, True)) dest_len = 0; - } if (dest_len && dest) { /* Did we already process the terminating zero ? */ @@ -1333,10 +1335,14 @@ size_t push_ucs2_talloc(TALLOC_CTX *ctx, smb_ucs2_t **dest, const char *src) size_t push_ucs2_allocate(smb_ucs2_t **dest, const char *src) { - size_t src_len = strlen(src)+1; + size_t dest_len, src_len = strlen(src)+1; *dest = NULL; - return convert_string_allocate(NULL, CH_UNIX, CH_UTF16LE, src, src_len, (void **)dest, True); + if (!convert_string_allocate(NULL, CH_UNIX, CH_UTF16LE, src, src_len, + (void **)dest, &dest_len, True)) + return (size_t)-1; + else + return dest_len; } /** @@ -1410,10 +1416,14 @@ size_t push_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src) size_t push_utf8_allocate(char **dest, const char *src) { - size_t src_len = strlen(src)+1; + size_t dest_len, src_len = strlen(src)+1; *dest = NULL; - return convert_string_allocate(NULL, CH_UNIX, CH_UTF8, src, src_len, (void **)dest, True); + if (!convert_string_allocate(NULL, CH_UNIX, CH_UTF8, src, src_len, + (void **)dest, &dest_len, True)) + return (size_t)-1; + else + return dest_len; } /** @@ -1625,9 +1635,13 @@ size_t pull_ucs2_talloc(TALLOC_CTX *ctx, char **dest, const smb_ucs2_t *src) size_t pull_ucs2_allocate(char **dest, const smb_ucs2_t *src) { - size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t); + size_t dest_len, src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t); *dest = NULL; - return convert_string_allocate(NULL, CH_UTF16LE, CH_UNIX, src, src_len, (void **)dest, True); + if (!convert_string_allocate(NULL, CH_UTF16LE, CH_UNIX, src, src_len, + (void **)dest, &dest_len, True)) + return (size_t)-1; + else + return dest_len; } /** @@ -1655,9 +1669,13 @@ size_t pull_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src) size_t pull_utf8_allocate(char **dest, const char *src) { - size_t src_len = strlen(src)+1; + size_t dest_len, src_len = strlen(src)+1; *dest = NULL; - return convert_string_allocate(NULL, CH_UTF8, CH_UNIX, src, src_len, (void **)dest, True); + if (!convert_string_allocate(NULL, CH_UTF8, CH_UNIX, src, src_len, + (void **)dest, &dest_len, True)) + return (size_t)-1; + else + return dest_len; } /** diff --git a/source3/lib/util_reg.c b/source3/lib/util_reg.c index 7366dcb2a7..7c0c42d7d8 100644 --- a/source3/lib/util_reg.c +++ b/source3/lib/util_reg.c @@ -93,10 +93,8 @@ WERROR reg_pull_multi_sz(TALLOC_CTX *mem_ctx, const void *buf, size_t len, size_t dstlen, thislen; thislen = strnlen_w(p, len) + 1; - dstlen = convert_string_allocate(*values, CH_UTF16LE, CH_UNIX, - p, thislen*2, (void *)&val, - true); - if (dstlen == (size_t)-1) { + if (!convert_string_allocate(*values, CH_UTF16LE, CH_UNIX, + p, thislen*2, (void *)&val, &dstlen, true)) { TALLOC_FREE(*values); return WERR_NOMEM; } -- cgit