summaryrefslogtreecommitdiffhomepage
path: root/src/internal/slibtool_snprintf_impl.c
diff options
context:
space:
mode:
authormidipix <writeonce@midipix.org>2024-02-10 02:50:51 +0000
committermidipix <writeonce@midipix.org>2024-02-10 03:01:55 +0000
commit19022ee7547839690948a7a9807930a7891f3f15 (patch)
tree782384fd6f5c56272efdfd29533a623937fe9ea6 /src/internal/slibtool_snprintf_impl.c
parent2f8d3eabcf743d1e398277e7b4e6a03bbdd574ee (diff)
downloadslibtool-19022ee7547839690948a7a9807930a7891f3f15.tar.bz2
slibtool-19022ee7547839690948a7a9807930a7891f3f15.tar.xz
code base: simplify checks against value returned from snprintf() via wrapper.
Diffstat (limited to 'src/internal/slibtool_snprintf_impl.c')
-rw-r--r--src/internal/slibtool_snprintf_impl.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/internal/slibtool_snprintf_impl.c b/src/internal/slibtool_snprintf_impl.c
new file mode 100644
index 0000000..d883af6
--- /dev/null
+++ b/src/internal/slibtool_snprintf_impl.c
@@ -0,0 +1,39 @@
+/*******************************************************************/
+/* slibtool: a skinny libtool implementation, written in C */
+/* Copyright (C) 2016--2021 SysDeer Technologies, LLC */
+/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "slibtool_snprintf_impl.h"
+
+
+/*****************************************************************/
+/* snprintf() wrapper that simplifies usage via the following: */
+/* */
+/* (1) fail (return a negative result) in case the buffer is */
+/* not sufficiently large for the formatted string plus */
+/* the terminating null character. */
+/* */
+/**********************************************************/
+
+
+int slbt_snprintf(char * buf, size_t buflen, const char * fmt, ...)
+{
+ va_list ap;
+ size_t nbytes;
+
+ va_start(ap,fmt);
+ nbytes = vsnprintf(buf,buflen,fmt,ap);
+ va_end(ap);
+
+ if (nbytes >= buflen)
+ return -1;
+
+ return nbytes;
+}