From 8ba2314e4b1e72ba3c5ccf7cb5a8ceffbda4e4c6 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sun, 28 Dec 2025 15:40:00 +0800
Subject: feat(stdlib): standard I/O Implementation

---
 stdlib/stdio.h | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 stdlib/stdio.h

(limited to 'stdlib/stdio.h')

diff --git a/stdlib/stdio.h b/stdlib/stdio.h
new file mode 100644
index 0000000..1fd66b7
--- /dev/null
+++ b/stdlib/stdio.h
@@ -0,0 +1,100 @@
+/* Standard I/O Library for Lume OS */
+
+#ifndef _STDIO_H
+#define _STDIO_H
+
+#include <stdarg.h>
+
+/*Type Definition (Adjusted According to Architecture)*/
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+/*Macro definition*/
+#define EOF (-1)
+
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+
+/* Basic integer types */
+typedef unsigned int uint;
+typedef unsigned short ushort;
+typedef unsigned char uchar;
+
+typedef unsigned char uint8;
+typedef unsigned short uint16;
+typedef unsigned int uint32;
+typedef unsigned long long uint64;
+
+typedef char int8;
+typedef short int16;
+typedef int int32;
+typedef long long int64;
+typedef long long intptr_t;
+
+/* FILE structure */
+typedef struct
+{
+    int fd;    // File descriptor
+    int flags; // Status flag
+    int error; // Error flag
+    int eof;   // EOF flag
+    int used;  // Static pool occupancy flag
+} FILE;
+
+/* standard stream object */
+extern FILE *stdin;
+extern FILE *stdout;
+extern FILE *stderr;
+
+/* Function Declaration */
+
+/* File Operations */
+FILE *fopen(const char *filename, const char *mode);
+int fclose(FILE *stream);
+int fflush(FILE *stream); // Not implement
+
+/* Formatted input and output */
+int printf(const char *format, ...);
+int scanf(const char *format, ...);
+int sprintf(char *str, const char *format, ...);
+int snprintf(char *str, uint64 size, const char *format, ...);
+int vsnprintf(char *str, uint64 size, const char *format, va_list ap);
+int sscanf(const char *str, const char *format, ...);
+
+int fprintf(FILE *stream, const char *format, ...);
+int fscanf(FILE *stream, const char *format, ...);
+
+/* Character/String Read and Write */
+int fputc(int c, FILE *stream);
+int fputs(const char *s, FILE *stream);
+int fgetc(FILE *stream);
+char *fgets(char *str, int n, FILE *stream);
+
+/* Common Macros/Wrapper Functions */
+#define getchar() fgetc(stdin)
+#define putchar(c) fputc((c), stdout)
+
+/* Binary read and write */
+uint64 fread(void *ptr, uint64 size, uint64 nmemb, FILE *stream);
+uint64 fwrite(const void *ptr, uint64 size, uint64 nmemb, FILE *stream);
+
+/* File location */
+int fseek(FILE *stream, long offset, int whence);
+long ftell(FILE *stream);
+void rewind(FILE *stream);
+
+/* Status Inquiry */
+int feof(FILE *stream);
+int ferror(FILE *stream);
+void clearerr(FILE *stream);
+
+/* Low-level system call */
+int64 open(const char *path, int flags, int mode);
+int64 close(int64 fd);
+int64 read(int64 fd, char *buf, uint64 count);
+int64 write(int64 fd, const char *buf, uint64 count);
+int64 lseek(int64 fd, int64 offset, int whence);
+
+#endif /* _STDIO_H */
\ No newline at end of file
-- 
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