/* 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" #ifdef __DO_UNLOCKED size_t fread_unlocked(void * __restrict ptr, size_t size, size_t nmemb, FILE * __restrict stream) { __STDIO_STREAM_VALIDATE(stream); assert(stream->__filedes >= -1); /* Note: If nmbem * size > SIZE_MAX then there is an application * bug since no array can be larger than SIZE_MAX in size. */ if ((__STDIO_STREAM_IS_NARROW_READING(stream) || !__STDIO_STREAM_TRANS_TO_READ(stream, __FLAG_NARROW)) && size && nmemb ) { if (nmemb <= (SIZE_MAX / size)) { unsigned char *buffer = (unsigned char *) ptr; size_t todo, bytes, avail; todo = bytes = size * nmemb; /* Check for ungots... */ while (stream->__modeflags & __FLAG_UNGOT) { *buffer++ = stream->__ungot[(stream->__modeflags--) & 1]; stream->__ungot[1] = 0; if (!--todo) { goto DONE; } } #ifdef __STDIO_BUFFERS /* Next check for available buffered... */ if ((avail = stream->__bufread - stream->__bufpos) > 0) { if (avail > todo) { avail = todo; } memcpy(buffer, stream->__bufpos, avail); buffer += avail; stream->__bufpos += avail; if (!(todo -= avail)) { goto DONE; } } /* We need to read from the host environment, so we must * flush all line buffered streams if the stream is not * fully buffered. */ if (!__STDIO_STREAM_IS_FBF(stream)) { __STDIO_FLUSH_LBF_STREAMS; } #endif #ifdef __UCLIBC_MJN3_ONLY__ #warning CONSIDER: should we refill and read from the buffer sometimes? #endif while ((avail = __stdio_READ(stream, buffer, todo)) > 0) { buffer += avail; if (!(todo -= avail)) { break; } } DONE: __STDIO_STREAM_VALIDATE(stream); return (bytes - todo) / size; } __STDIO_STREAM_SET_ERROR(stream); __set_errno(EINVAL); } __STDIO_STREAM_VALIDATE(stream); return 0; } libc_hidden_def(fread_unlocked) #ifndef __UCLIBC_HAS_THREADS__ strong_alias(fread_unlocked,fread) libc_hidden_def(fread) #endif #elif defined __UCLIBC_HAS_THREADS__ size_t fread(void * __restrict ptr, size_t size, size_t nmemb, register FILE * __restrict stream) { size_t retval; __STDIO_AUTO_THREADLOCK_VAR; __STDIO_AUTO_THREADLOCK(stream); retval = fread_unlocked(ptr, size, nmemb, stream); __STDIO_AUTO_THREADUNLOCK(stream); return retval; } libc_hidden_def(fread) #endif