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Fix ast_str_truncate signedness warning and documentation.

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Review: https://reviewboard.asterisk.org/r/1594
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Merged revisions 346144 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 346145 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@346146 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Walter Doekes
2011-11-23 19:58:19 +00:00
parent e6ca768081
commit b7aee9ebc9
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.
* \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.
*/
AST_INLINE_API(
char *ast_str_truncate(struct ast_str *buf, ssize_t len),
{
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 {
buf->__AST_STR_USED = len;
}