string: add bson_strnlen() for systems without strnlen().

finnoon · Feb 9, 2014 · 367b45f · 367b45f
1 parent 33be947
commit 367b45f
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Showing 3 changed files with 28 additions and 1 deletion.
diff --git a/bson/bson-string.c b/bson/bson-string.c
@@ -15,6 +15,10 @@
  */
 
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #include <stdarg.h>
 #include <string.h>
 
@@ -264,3 +268,23 @@ bson_strfreev (char **str)
       bson_free (str);
    }
 }
+
+
+size_t
+bson_strnlen (const char *s,
+              size_t      maxlen)
+{
+#ifdef HAVE_STRNLEN
+   return strnlen (s, maxlen);
+#else
+   size_t i;
+
+   for (i = 0; i < maxlen; i++) {
+      if (s [i] == '\0') {
+         return i + 1;
+      }
+   }
+
+   return maxlen;
+#endif
+}
diff --git a/bson/bson-string.h b/bson/bson-string.h
@@ -98,6 +98,9 @@ bson_strndup (const char *str,
 void bson_strfreev (char **strv);
 
 
+size_t bson_strnlen (const char *s, size_t maxlen);
+
+
 BSON_END_DECLS
 
 

diff --git a/configure.ac b/configure.ac
@@ -161,7 +161,7 @@ AC_CHECK_FUNCS([clock_gettime], [CLOCK_LIB=],
 			     [CLOCK_LIB=])])
 AC_SUBST([CLOCK_LIB])
 
-AC_CHECK_FUNCS(posix_memalign memalign)
+AC_CHECK_FUNCS(posix_memalign memalign strnlen)
 
 
 dnl **************************************************************************