code cleanup, remove broken usb identification

1 files changed, 24 insertions, 0 deletions

diff --git a/ds.h b/ds.h
index 1a3d771..2d23742 100644
--- a/ds.h
+++ b/ds.h
@@ -656,4 +656,28 @@ static void int_hash_table_clear(IntHashTable *t) {
 	t->count = 0;
 }
 
+static char *va_sprintf(const char *fmt, va_list args) {
+	va_list args_copy;
+	va_copy(args_copy, args);
+	char fakebuf[2] = {0};
+	int ret = vsnprintf(fakebuf, 1, fmt, args_copy);
+	va_end(args_copy);
+	
+	if (ret < 0) return NULL; // bad format or something
+	size_t n = (size_t)ret;
+	char *str = calloc(1, n + 1);
+	vsnprintf(str, n + 1, fmt, args);
+	return str;
+}
+
+static char *a_sprintf(PRINTF_FORMAT_STRING const char *fmt, ...) ATTRIBUTE_PRINTF(1, 2);
+static char *a_sprintf(const char *fmt, ...) {
+	// idk if you can always just pass NULL to vsnprintf
+	va_list args;
+	va_start(args, fmt);
+	char *str = va_sprintf(fmt, args);
+	va_end(args);
+	return str;
+}
+
 #endif // DS_H_