[Asterisk-cvs] asterisk/include/asterisk utils.h,1.28,1.29
kpfleming at lists.digium.com
kpfleming at lists.digium.com
Sun May 1 20:20:55 CDT 2005
Update of /usr/cvsroot/asterisk/include/asterisk
In directory localhost.localdomain:/tmp/cvs-serv23801/include/asterisk
Modified Files:
utils.h
Log Message:
add experimental ast_copy_string() function to be used in place of strncpy() (see discussion on asterisk-dev)
Index: utils.h
===================================================================
RCS file: /usr/cvsroot/asterisk/include/asterisk/utils.h,v
retrieving revision 1.28
retrieving revision 1.29
diff -u -d -r1.28 -r1.29
--- utils.h 21 Apr 2005 06:02:44 -0000 1.28
+++ utils.h 2 May 2005 00:27:54 -0000 1.29
@@ -9,18 +9,20 @@
* the GNU General Public License
*/
-#ifndef _ASTERISK_UTIL_H
-#define _ASTERISK_UTIL_H
+#ifndef _ASTERISK_UTILS_H
+#define _ASTERISK_UTILS_H
#ifdef SOLARIS
#include <solaris-compat/compat.h>
#endif
+
#include <netinet/in.h>
#include <netdb.h>
#include <pthread.h>
-#include "asterisk/lock.h"
#include <limits.h>
+#include "asterisk/lock.h"
+
/* Note:
It is very important to use only unsigned variables to hold
bit flags, as otherwise you can fall prey to the compiler's
@@ -166,10 +168,33 @@
#define AST_STACKSIZE 256 * 1024
#define ast_pthread_create(a,b,c,d) ast_pthread_create_stack(a,b,c,d,0)
+extern int ast_pthread_create_stack(pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *), void *data, size_t stacksize);
+
#ifdef __linux__
#define ast_strcasestr strcasestr
#else
extern char *ast_strcasestr(const char *, const char *);
#endif /* __linux__ */
-extern int ast_pthread_create_stack(pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *), void *data, size_t stacksize);
+
+#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
+#define __builtin_expect(exp, c) (exp)
#endif
+
+/*!
+ \brief Size-limited null-terminating string copy.
+ \param dst The destination buffer.
+ \param src The source string
+ \param size The size of the destination buffer
+
+ This is similar to \a strncpy, with two important differences:
+ - the destination buffer will \b always be null-terminated
+ - the destination buffer is not filled with zeros past the copied string length
+ These differences make it slightly more efficient, and safer to use since it will
+ not leave the destination buffer unterminated. There is no need to pass an artificially
+ reduced buffer size to this function (unlike \a strncpy), and the buffer does not need
+ to be initialized to zeroes prior to calling this function.
+ No return value.
+*/
+void ast_copy_string(char *dst, const char *src, size_t size);
+
+#endif /* _ASTERISK_UTILS_H */
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