From 4e09bca9e34c226b6d7e34b4fa11248405fd988e Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Sun, 22 Oct 2023 19:50:38 +0200
Subject: Move everything into a new repo.
---
userland/libc/stdio/sprintf.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 userland/libc/stdio/sprintf.c
(limited to 'userland/libc/stdio/sprintf.c')
diff --git a/userland/libc/stdio/sprintf.c b/userland/libc/stdio/sprintf.c
new file mode 100644
index 0000000..deffbbe
--- /dev/null
+++ b/userland/libc/stdio/sprintf.c
@@ -0,0 +1,33 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+struct s_cookie {
+ char *s;
+};
+
+size_t s_write(FILE *f, const unsigned char *s, size_t l) {
+ struct s_cookie *c = f->cookie;
+ memcpy(c->s, s, l);
+ c->s += l;
+ *(c->s) = '\0';
+ return l;
+}
+
+int vsprintf(char *str, const char *format, va_list ap) {
+ struct s_cookie c = {.s = str};
+ FILE f = {
+ .write = s_write,
+ .cookie = &c,
+ };
+ return vfprintf(&f, format, ap);
+}
+
+int sprintf(char *str, const char *format, ...) {
+ va_list ap;
+ va_start(ap, format);
+ int rc = vsprintf(str, format, ap);
+ va_end(ap);
+ return rc;
+}
--
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