save point

lib/textc.c

@@ -0,0 +1,28 @@
+#include <string.h>
+#include <ctype.h>
+#include "xmem.h"
+
+#include "textc.h"
+
+char *str_dup(char *s)
+{
+	char *new = xmalloc(strlen(s) + 1);
+	strcpy(new, s);
+	return new;
+}
+
+char *tostrupr(char *s)
+{
+	char *new = str_dup(s);
+	for (int i = 0; new[i] != '\0'; ++i)
+		new[i] = toupper((unsigned char)new[i]);
+	return new;
+}
+
+char *tostrlwr(char *s)
+{
+	char *new = str_dup(s);
+	for (int i = 0; new[i] != '\0'; ++i)
+		new[i] = tolower((unsigned char)new[i]);
+	return new;
+}