C语言源代码及相关资料
源代码在线查看： retarget.c
/*---------------------------------------------------------------------------- * R T L - F l a s h F i l e S y s t e m *---------------------------------------------------------------------------- * Name: RETARGET.C * Purpose: Retarget low level functions * Rev.: V3.20 *---------------------------------------------------------------------------- * This code is part of the RealView Run-Time Library. * Copyright (c) 2004-2008 KEIL - An ARM Company. All rights reserved. *---------------------------------------------------------------------------*/ #include #include #include #include //#include typedef unsigned char U8; typedef unsigned short U16; typedef unsigned U32; #pragma import(__use_no_semihosting_swi) /* The following macro definitions may be used to translate this file: STDIO - use standard Input/Output device (default is NOT used) */ /* Standard IO device handles. */ #define STDIN 0x8001 #define STDOUT 0x8002 #define STDERR 0x8003 /* Standard IO device name defines. */ const char __stdin_name[] = "STDIN"; const char __stdout_name[] = "STDOUT"; const char __stderr_name[] = "STDERR"; #if 0 struct __FILE { int handle; /* Add whatever you need here */ }; #ifdef STDIO extern int sendchar (int ch); extern int getkey (void); #endif /*--------------------------- _ttywrch --------------------------------------*/ void _ttywrch (int ch) { #ifdef STDIO sendchar(ch); #endif } /*--------------------------- _sys_open -------------------------------------*/ FILEHANDLE _sys_open (const char *name, int openmode) { /* Register standard Input Output devices. */ if (strcmp(name, "STDIN") == 0) { return (STDIN); } if (strcmp(name, "STDOUT") == 0) { return (STDOUT); } if (strcmp(name, "STDERR") == 0) { return (STDERR); } return (__fopen (name, openmode)); } /*--------------------------- _sys_close ------------------------------------*/ int _sys_close (FILEHANDLE fh) { if (fh > 0x8000) { return (0); } return (__fclose (fh)); } /*--------------------------- _sys_write ------------------------------------*/ int _sys_write (FILEHANDLE fh, const U8 *buf, U32 len, int mode) { #ifdef STDIO if (fh == STDOUT) { /* Standard Output device. */ for ( ; len; len--) { sendchar (*buf++); } return (0); } #endif if (fh > 0x8000) { return (-1); } return (__write (fh, buf, len)); } /*--------------------------- _sys_read -------------------------------------*/ int _sys_read (FILEHANDLE fh, U8 *buf, U32 len, int mode) { #ifdef STDIO if (fh == STDIN) { /* Standard Input device. */ for ( ; len; len--) { *buf++ = getkey (); } return (0); } #endif if (fh > 0x8000) { return (-1); } return (__read (fh, buf, len)); } /*--------------------------- _sys_istty ------------------------------------*/ int _sys_istty (FILEHANDLE fh) { if (fh > 0x8000) { return (1); } return (0); } /*--------------------------- _sys_seek -------------------------------------*/ int _sys_seek (FILEHANDLE fh, long pos) { if (fh > 0x8000) { return (-1); } return (__setfpos (fh, pos)); } /*--------------------------- _sys_ensure -----------------------------------*/ int _sys_ensure (FILEHANDLE fh) { if (fh > 0x8000) { return (-1); } return (__flushbuf (fh)); } /*--------------------------- _sys_flen -------------------------------------*/ long _sys_flen (FILEHANDLE fh) { if (fh > 0x8000) { return (0); } return (__get_flen (fh)); } /*--------------------------- _sys_tmpnam -----------------------------------*/ int _sys_tmpnam (char *name, int sig, unsigned maxlen) { return (1); } /*--------------------------- _sys_command_string ---------------------------*/ char *_sys_command_string (char *cmd, int len) { return (cmd); } /*--------------------------- _sys_exit -------------------------------------*/ void _sys_exit (int return_code) { /* Endless loop. */ while (1); } #endif /*---------------------------------------------------------------------------- * end of file *---------------------------------------------------------------------------*/
