/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org> * * GNU Library General Public License (LGPL) version 2 or later. * * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details. */ #include "_stdio.h" #if SEEK_SET != 0 || SEEK_CUR != 1 || SEEK_END != 2 # error Assumption violated -- values of SEEK_SET, SEEK_CUR, SEEK_END #endif #ifdef __DO_LARGEFILE # ifndef __UCLIBC_HAS_LFS__ # error large file support is not enabled! # endif # define FSEEK __fseeko64 # define OFFSET_TYPE __off64_t weak_alias(__fseeko64,fseeko64); #else # define FSEEK fseek # define OFFSET_TYPE long int weak_alias(fseek,fseeko); #endif int FSEEK(register FILE *stream, OFFSET_TYPE offset, int whence) { #if defined(__UCLIBC_HAS_LFS__) && !defined(__DO_LARGEFILE) return __fseeko64(stream, offset, whence); #else __offmax_t pos = offset; int retval = -1; __STDIO_AUTO_THREADLOCK_VAR; if (((unsigned int) whence) > 2) { __set_errno(EINVAL); } else { __STDIO_AUTO_THREADLOCK(stream); __STDIO_STREAM_VALIDATE(stream); if ((!__STDIO_STREAM_IS_WRITING(stream) || !__STDIO_COMMIT_WRITE_BUFFER(stream)) && ((whence != SEEK_CUR) || (__stdio_adjust_position(stream, &pos) >= 0)) && (__SEEK(stream, &pos, whence) >= 0) ) { /* Clear reading/writing modes, EOF, and ungots. */ stream->__modeflags &= ~(__MASK_READING|__FLAG_WRITING|__FLAG_EOF); /* Make sure all pointers are reset. */ __STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream); __STDIO_STREAM_DISABLE_GETC(stream); __STDIO_STREAM_DISABLE_PUTC(stream); /* We reinitialize the mbstate object. Doing so is * implementation defined behavior. */ #ifdef __STDIO_MBSTATE __INIT_MBSTATE(&(stream->__state)); #endif #ifdef __UCLIBC_HAS_WCHAR__ stream->__ungot_width[0] = 0; #endif retval = 0; } __STDIO_STREAM_VALIDATE(stream); __STDIO_AUTO_THREADUNLOCK(stream); } return retval; #endif }