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[libc][syscalls] 新手PR任务_增加文件操作相关函数的文档注释 #10893

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[libc][syscalls] 新手PR任务_增加文件操作相关函数的文档注释 #10893

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增加文件操作相关函数的文档注释
HosakaSu Nov 4, 2025
e4f3e11
style: format code with clang-format [skip ci]
github-actions[bot] Nov 4, 2025
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44 changes: 35 additions & 9 deletions components/libc/compilers/armlibc/syscalls.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,23 +27,23 @@
#endif /* RT_USING_POSIX_STDIO */
#include <posix/stdlib.h>

#define DBG_TAG "armlibc.syscalls"
#define DBG_LVL DBG_INFO
#define DBG_TAG "armlibc.syscalls"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>

#ifdef __clang__
__asm(".global __use_no_semihosting\n\t");
__asm(".global __use_no_semihosting\n\t");
#else
#pragma import(__use_no_semihosting_swi)
#pragma import(__use_no_semihosting_swi)
#endif

/* Standard IO device handles. */
#define STDIN 0
#define STDOUT 1
#define STDERR 2
#define STDIN 0
#define STDOUT 1
#define STDERR 2

/* Standard IO device name defines. */
const char __stdin_name[] = "STDIN";
const char __stdin_name[] = "STDIN";
const char __stdout_name[] = "STDOUT";
const char __stderr_name[] = "STDERR";

Expand Down Expand Up @@ -314,7 +314,8 @@ void _ttywrch(int ch)
rt_weak void _sys_exit(int return_code)
{
__rt_libc_exit(return_code);
while (1);
while (1)
;
}

/**
Expand All @@ -339,6 +340,12 @@ long _sys_flen(FILEHANDLE fh)
#endif /* DFS_USING_POSIX */
}

/**
* check whether the file is a terminal device.
*
* @param fh - file handle
* @return 1 if is a terminal device, 0 if not
*/
int _sys_istty(FILEHANDLE fh)
{
if ((STDIN <= fh) && (fh <= STDERR))
Expand All @@ -347,6 +354,12 @@ int _sys_istty(FILEHANDLE fh)
return 0;
}

/**
* remove a file
*
* @param filename - file name with path
* @return 0 on success, -1 on failed
*/
int remove(const char *filename)
{
#ifdef DFS_USING_POSIX
Expand All @@ -360,6 +373,13 @@ int remove(const char *filename)
#ifdef __MICROLIB
#include <stdio.h>

/**
* write a character to file
*
* @param c - character to write
* @param fh - file handle
* @return 1 on success, 0 on failed
*/
int fputc(int c, FILE *f)
{
#ifdef RT_USING_CONSOLE
Expand All @@ -370,6 +390,12 @@ int fputc(int c, FILE *f)
#endif /* RT_USING_CONSOLE */
}

/**
* get a character from file
*
* @param fh - file handle
* @return character read, or -1 on failed
*/
int fgetc(FILE *f)
{
#ifdef RT_USING_POSIX_STDIO
Expand Down