util: implement trim()

2 files changed, 23 insertions, 0 deletions

diff --git a/include/util.h b/include/util.h
new file mode 100644
index 0000000..e0f92f5
--- /dev/null
+++ b/include/util.h
@@ -0,0 +1,6 @@
+#ifndef __UTIL_H
+#define __UTIL_H
+
+char *trim(char *s);
+
+#endif
diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..6a061a9
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,17 @@
+#include <ctype.h>
+#include <string.h>
+#include <util.h>
+
+char *
+trim(char *s)
+{
+  int i;
+
+  while (isspace(*s))
+    s++; // skip left side white spaces
+  for (i = strlen(s) - 1; (isspace(s[i])); i--)
+    ; // skip right side white spaces
+  s[i + 1] = '\0';
+
+  return s;
+}