1 files changed, 51 insertions, 0 deletions
diff --git a/src/user/lib/printf.c b/src/user/lib/printf.c
new file mode 100644
index 0000000..443c424
--- /dev/null
+++ b/src/user/lib/printf.c
@@ -0,0 +1,51 @@
+#include <camellia/syscalls.h>
+#include <shared/printf.h>
+#include <stdio.h>
+#include <string.h>
+
+
+static void backend_file(void *arg, const char *buf, size_t len) {
+	fwrite(buf, 1, len, (FILE *)arg);
+}
+
+int printf(const char *fmt, ...) {
+	int ret = 0;
+	va_list argp;
+	va_start(argp, fmt);
+	ret = __printf_internal(fmt, argp, backend_file, (void*)stdout);
+	va_end(argp);
+	return ret;
+}
+
+static void backend_buf(void *arg, const char *buf, size_t len) {
+	char **ptrs = arg;
+	size_t space = ptrs[1] - ptrs[0];
+	if (len > space) len = space;
+	memcpy(ptrs[0], buf, len);
+	ptrs[0] += len;
+}
+
+int snprintf(char *str, size_t len, const char *fmt, ...) {
+	int ret = 0;
+	char *ptrs[2] = {str, str + len};
+	va_list argp;
+	va_start(argp, fmt);
+	ret = __printf_internal(fmt, argp, backend_buf, &ptrs);
+	va_end(argp);
+	if (ptrs[0] < ptrs[1]) *ptrs[0] = '\0';
+	return ret;
+}
+
+int _klogf(const char *fmt, ...) {
+	// idiotic. however, this hack won't matter anyways
+	char buf[256];
+	int ret = 0;
+	char *ptrs[2] = {buf, buf + sizeof buf};
+	va_list argp;
+	va_start(argp, fmt);
+	ret = __printf_internal(fmt, argp, backend_buf, &ptrs);
+	va_end(argp);
+	if (ptrs[0] < ptrs[1]) *ptrs[0] = '\0';
+	_syscall_debug_klog(buf, ret);
+	return ret;
+}