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Fix ast_str_truncate signedness warning and documentation.

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Review: https://reviewboard.asterisk.org/r/1594


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@346144 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Walter Doekes
2011-11-23 19:53:58 +00:00
parent c4b7983866
commit 38e0ec57ee
1 changed files with 8 additions and 2 deletions
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10
include/asterisk/strings.h
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@@ -498,14 +498,20 @@ char * attribute_pure ast_str_buffer(const struct ast_str *buf),
/*!\brief Truncates the enclosed string to the given length. /*!\brief Truncates the enclosed string to the given length.
* \param buf A pointer to the ast_str structure. * \param buf A pointer to the ast_str structure.
* \param len Maximum length of the string. * \param len Maximum length of the string. If len is larger than the
* current maximum length, things will explode. If it is negative
* at most -len characters will be trimmed off the end.
* \retval A pointer to the resulting string. * \retval A pointer to the resulting string.
*/ */
AST_INLINE_API( AST_INLINE_API(
char *ast_str_truncate(struct ast_str *buf, ssize_t len), char *ast_str_truncate(struct ast_str *buf, ssize_t len),
{ {
if (len < 0) { if (len < 0) {
buf->__AST_STR_USED += ((ssize_t) abs(len)) > (ssize_t) buf->__AST_STR_USED ? -buf->__AST_STR_USED : len; if ((typeof(buf->__AST_STR_USED)) -len >= buf->__AST_STR_USED) {
buf->__AST_STR_USED = 0;
} else {
buf->__AST_STR_USED += len;
}
} else { } else {
buf->__AST_STR_USED = len; buf->__AST_STR_USED = len;
} }