Add pm_strnlen because Mac OSX before 10.7, at least, does not have it

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@3125 9d0c8265-081b-0410-96cb-a4ca84ce46f8

2 files changed, 17 insertions, 0 deletions

diff --git a/lib/util/nstring.c b/lib/util/nstring.c
index 48984309..8cff4d56 100644
--- a/lib/util/nstring.c
+++ b/lib/util/nstring.c
@@ -195,6 +195,19 @@ static char credits[] = "\n\
 @(#)snprintf.c, v2.2: http://www.ijs.si/software/snprintf/\n";
 
 
+/* MacOS X before 10.7, for one, does not have strnlen */
+size_t
+pm_strnlen(const char * const s,
+           size_t       const maxlen) {
+
+    unsigned int i;
+
+    for (i = 0; i < maxlen && s[i]; ++i) {}
+
+    return i;
+}
+
+
 
 void
 pm_vsnprintf(char *       const str,
diff --git a/lib/util/nstring.h b/lib/util/nstring.h
index 257b04b0..bded8417 100644
--- a/lib/util/nstring.h
+++ b/lib/util/nstring.h
@@ -150,6 +150,10 @@ strncaseeq(const char * const comparand,
 
 extern const char * const pm_strsol;
 
+size_t
+pm_strnlen(const char * const s,
+           size_t       const maxlen);
+
 int
 pm_snprintf(char *       const dest,
             size_t       const str_m,