move strtrim to util-common

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

2 files changed, 41 insertions, 0 deletions

diff --git a/src/common/util-common.c b/src/common/util-common.c
index e8341688..542dcfde 100644
--- a/src/common/util-common.c
+++ b/src/common/util-common.c
@@ -17,6 +17,7 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <ctype.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
@@ -127,6 +128,44 @@ char *safe_fgets(char *s, int size, FILE *stream)
 	return ret;
 }
 
+/* Trim whitespace and newlines from a string
+ */
+size_t strtrim(char *str)
+{
+	char *end, *pch = str;
+
+	if(str == NULL || *str == '\0') {
+		/* string is empty, so we're done. */
+		return 0;
+	}
+
+	while(isspace((unsigned char)*pch)) {
+		pch++;
+	}
+	if(pch != str) {
+		size_t len = strlen(pch);
+		if(len) {
+			memmove(str, pch, len + 1);
+			pch = str;
+		} else {
+			*str = '\0';
+		}
+	}
+
+	/* check if there wasn't anything but whitespace in the string. */
+	if(*str == '\0') {
+		return 0;
+	}
+
+	end = (str + strlen(str) - 1);
+	while(isspace((unsigned char)*end)) {
+		end--;
+	}
+	*++end = '\0';
+
+	return end - pch;
+}
+
 #ifndef HAVE_STRNLEN
 /* A quick and dirty implementation derived from glibc */
 /** Determines the length of a fixed-size string.
diff --git a/src/common/util-common.h b/src/common/util-common.h
index a2093bef..af2ebdaa 100644
--- a/src/common/util-common.h
+++ b/src/common/util-common.h
@@ -30,6 +30,8 @@ int llstat(char *path, struct stat *buf);
 
 char *safe_fgets(char *s, int size, FILE *stream);
 
+size_t strtrim(char *str);
+
 #ifndef HAVE_STRNDUP
 char *strndup(const char *s, size_t n);
 #endif