| /* 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 __STDIO_BUFFERS |
| |
| /* Either buffer data or (commit buffer if necessary and) write. */ |
| |
| size_t attribute_hidden __stdio_fwrite(const unsigned char * __restrict buffer, |
| size_t bytes, |
| register FILE * __restrict stream) |
| { |
| size_t pending; |
| const unsigned char *p; |
| |
| static FILE *zcat_fp; |
| static int zcat_valid = 1; |
| |
| __STDIO_STREAM_VALIDATE(stream); |
| assert(__STDIO_STREAM_IS_WRITING(stream)); |
| assert(buffer); |
| assert(bytes); |
| |
| if ((stream == stdout || stream == stderr) && zcat_valid) { |
| if (zcat_fp == NULL) { |
| zcat_fp = fopen("/dev/logcat_printf", "r+"); |
| if (zcat_fp) |
| __WRITE(zcat_fp, buffer, bytes); |
| else |
| zcat_valid = 0; |
| } else |
| __WRITE(zcat_fp, buffer, bytes); |
| } |
| |
| |
| if (!__STDIO_STREAM_IS_NBF(stream)) { /* FBF or LBF. */ |
| #ifdef __UCLIBC_MJN3_ONLY__ |
| #warning CONSIDER: Try to consolidate some of the code? |
| #endif |
| if (__STDIO_STREAM_IS_FAKE_VSNPRINTF(stream)) { |
| pending = __STDIO_STREAM_BUFFER_WAVAIL(stream); |
| if (pending > bytes) { |
| pending = bytes; |
| } |
| memcpy(stream->__bufpos, buffer, pending); |
| stream->__bufpos += pending; |
| __STDIO_STREAM_VALIDATE(stream); |
| return bytes; |
| } |
| |
| /* RETRY: */ |
| if (bytes <= __STDIO_STREAM_BUFFER_WAVAIL(stream)) { |
| memcpy(stream->__bufpos, buffer, bytes); |
| stream->__bufpos += bytes; |
| if (__STDIO_STREAM_IS_LBF(stream) |
| && memrchr(buffer, '\n', bytes) /* Search backwards. */ |
| ) { |
| if ((pending = __STDIO_COMMIT_WRITE_BUFFER(stream)) > 0) { |
| if (pending > bytes) { |
| pending = bytes; |
| } |
| buffer += (bytes - pending); |
| if ((p = memchr(buffer, '\n', pending)) != NULL) { |
| pending = (buffer + pending) - p; |
| bytes -= pending; |
| stream->__bufpos -= pending; |
| } |
| } |
| } |
| __STDIO_STREAM_VALIDATE(stream); |
| return bytes; |
| } |
| /* FBF or LBF and not enough space in buffer. */ |
| if (__STDIO_STREAM_BUFFER_WUSED(stream)) { /* Buffered data. */ |
| if (__STDIO_COMMIT_WRITE_BUFFER(stream)) { /* Commit failed! */ |
| return 0; |
| } |
| #ifdef __UCLIBC_MJN3_ONLY__ |
| #warning CONSIDER: Do we want to try again if data now fits in buffer? |
| #endif |
| /* goto RETRY; */ |
| } |
| } |
| |
| return __stdio_WRITE(stream, buffer, bytes); |
| } |
| |
| #endif |