[asterisk-commits] wdoekes: branch 1.8 r346144 - /branches/1.8/include/asterisk/strings.h

[SVN commits to the Asterisk project]

Author: wdoekes
Date: Wed Nov 23 13:53:58 2011
New Revision: 346144

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=346144
Log:
Fix ast_str_truncate signedness warning and documentation.

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

Modified:
    branches/1.8/include/asterisk/strings.h

Modified: branches/1.8/include/asterisk/strings.h
URL: http://svnview.digium.com/svn/asterisk/branches/1.8/include/asterisk/strings.h?view=diff&rev=346144&r1=346143&r2=346144
==============================================================================
--- branches/1.8/include/asterisk/strings.h (original)
+++ branches/1.8/include/asterisk/strings.h Wed Nov 23 13:53:58 2011
@@ -498,14 +498,20 @@
 
 /*!\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;
 	}