LibC: add stubs for a lot of functions

libc/stdio.cpp

@@ -0,0 +1,95 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <unistd.h>
+
+struct FILE
+{
+	int fd;
+};
+
+static FILE __stdin { .fd = STDIN_FILENO };
+static FILE __stdout { .fd = STDOUT_FILENO };
+static FILE __stderr { .fd = STDERR_FILENO };
+
+FILE* stdin = &__stdin;
+FILE* stdout = &__stdout;
+FILE* stderr = &__stderr;
+
+int fclose(FILE*)
+{
+	return -1;
+}
+
+int fflush(FILE*)
+{
+	return 0;
+}
+
+FILE* fopen(const char* __restrict__, const char* __restrict__)
+{
+	return nullptr;
+}
+
+int fseek(FILE*, long, int)
+{
+	return -1;
+}
+
+long ftell(FILE*)
+{
+	return -1;
+}
+
+size_t fread(void* __restrict__, size_t, size_t, FILE*)
+{
+	return 0;
+}
+
+size_t fwrite(void const* __restrict__, size_t, size_t, FILE*)
+{
+	return 0;
+}
+
+int fprintf(FILE* __restrict__ file, const char* __restrict__ format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	int res = vfprintf(stdout, format, args);
+	va_end(args);
+	return res;
+}
+
+
+void setbuf(FILE* __restrict__, char* __restrict__)
+{
+
+}
+
+int vfprintf(FILE* __restrict__, const char* __restrict__, va_list)
+{
+	return -1;
+}
+
+int printf(const char* __restrict__ format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	int res = vfprintf(stdout, format, args);
+	va_end(args);
+	return res;
+}
+
+int putchar(int ch)
+{
+	return printf("%c", ch);
+}
+
+int puts(const char* str)
+{
+	return printf("%s", str);
+}
+
+int sprintf(char* __restrict__ stream, const char* __restrict__ format, ...)
+{
+	return -1;
+}