Added more gui interaction

1 files changed, 46 insertions, 0 deletions

diff --git a/util.c b/util.c
index b9f37de..675dc3c 100644
--- a/util.c
+++ b/util.c
@@ -2,11 +2,15 @@
 
 #include "util.h"
 
+#include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 #include <wchar.h>
 #include <wctype.h>
 
+static const char *allowed = "abcdefghijklmnopqrstuvwxyz"
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.:,;-_(){}[]";
+
 int
 strnwidth(const char *s, int n)
 {
@@ -41,3 +45,45 @@ assert(int cond, const char *file, int line, const char *condstr)
 	fprintf(stderr, "Assertion failed %s:%i (%s)", file, line, condstr);
 	exit(1);
 }
+
+char *
+sanitized(const char *instr)
+{
+	const char *p;
+	char *clean;
+	int i;
+
+	clean = strdup(instr);
+	ASSERT(clean != NULL);
+	for (i = 0, p = instr; *p; p++) {
+		if (strchr(allowed, *p))
+			clean[i++] = *p;
+	}
+	ASSERT(i != 0);
+	clean[i] = '\0';
+
+	return clean;
+}
+
+char *
+aprintf(const char *fmtstr, ...)
+{
+	va_list ap, cpy;
+	size_t size;
+	char *str;
+
+	va_copy(cpy, ap);
+
+	va_start(ap, fmtstr);
+	size = vsnprintf(NULL, 0, fmtstr, ap);
+	va_end(ap);
+
+	str = malloc(size + 1);
+	ASSERT(str != NULL);
+
+	va_start(cpy, fmtstr);
+	vsnprintf(str, size + 1, fmtstr, cpy);
+	va_end(cpy);
+
+	return str;
+}