1 files changed, 82 insertions, 0 deletions
diff --git a/string.c b/string.c
new file mode 100644
index 0000000..5af082b
--- /dev/null
+++ b/string.c
@@ -0,0 +1,82 @@
+/* $Id: string.c,v 1.1 2004-05-03 05:17:48 behdad Exp $
+ *
+ * Some string handling routines
+ */
+#include "c2man.h"
+#include <ctype.h>
+
+/* Copy the string into an allocated memory block.
+ * Return a pointer to the copy.
+ */
+char *
+strduplicate (s)
+const char *s;	/* The string to copy. May be NULL */
+{
+    char *dest;
+
+    if (!s)	return NULL;
+    
+    if ((dest = malloc((unsigned)(strlen(s)+1))) == NULL)
+	outmem();
+
+    strcpy(dest, s);
+    return dest;
+}
+
+#ifndef HAS_STRSTR
+
+/* Return a pointer to the first occurence of the substring 
+ * within the string, or NULL if not found.
+ */
+char *
+strstr (src, key)
+const char *src, *key;
+{
+    char *s;
+    int keylen;
+
+    keylen = strlen(key);
+    s = strchr(src, *key);
+    while (s != NULL) {
+	if (strncmp(s, key, keylen) == 0)
+	    return s;
+	s = strchr(s+1, *key);
+    }
+    return NULL;
+}
+
+#endif
+
+/* compare two strings case insensitively, for up to n chars */
+int strncmpi(s1, s2, n)
+const char *s1, *s2;
+size_t n;
+{
+    while(n--)
+    {
+	char c1 = *s1, c2 = *s2;
+
+	if (c1 == '\0' && c2 == '\0')	break;
+
+	if (isalpha(c1) && isupper(c1))	c1 = tolower(c1);
+	if (isalpha(c2) && isupper(c2))	c2 = tolower(c2);
+
+	if (c1 < c2)	return -1;
+	if (c1 > c2)	return 1;
+	s1++; s2++;
+    }
+    return 0;
+}
+
+/* convert string to upper case */
+char *strtoupper(in)
+char *in;
+{
+    char *s;
+
+    for (s = in; *s; s++)
+    {
+	if (islower(*s))	*s = toupper(*s);
+    }
+    return in;
+}