mirror of
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339 lines
8.9 KiB
C
339 lines
8.9 KiB
C
/*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2019 by Olaf Barthel <obarthel (at) gmx.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _STDLIB_NULL_POINTER_CHECK_H
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#include "stdlib_null_pointer_check.h"
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#endif /* _STDLIB_NULL_POINTER_CHECK_H */
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/****************************************************************************/
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#ifndef _STDIO_HEADERS_H
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#include "stdio_headers.h"
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#endif /* _STDIO_HEADERS_H */
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/****************************************************************************/
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/* Both fputs() and puts() share this function. */
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int
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__fputs(const char *s, int line_feed, FILE *stream)
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{
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struct iob * file = (struct iob *)stream;
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size_t total_size;
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int result = EOF;
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int buffer_mode;
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int c;
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ENTER();
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SHOWSTRING(s);
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SHOWPOINTER(stream);
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assert( s != NULL && stream != NULL );
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if (__check_abort_enabled)
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__check_abort();
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#if defined(CHECK_FOR_NULL_POINTERS)
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{
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if (s == NULL || stream == NULL)
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{
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__set_errno(EFAULT);
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goto out;
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}
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}
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#endif /* CHECK_FOR_NULL_POINTERS */
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flockfile(stream);
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assert( __is_valid_iob(file) );
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assert( FLAG_IS_SET(file->iob_Flags,IOBF_IN_USE) );
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assert( file->iob_BufferSize > 0 );
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if (__fputc_check(stream) < 0)
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goto out;
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assert( 0 <= file->iob_BufferWriteBytes );
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assert( file->iob_BufferWriteBytes <= file->iob_BufferSize );
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assert( file->iob_BufferPosition <= file->iob_BufferSize );
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/* We perform line buffering to improve readability of the
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* buffered text if buffering was disabled and the output
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* goes to an interactive stream.
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*/
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buffer_mode = (file->iob_Flags & IOBF_BUFFER_MODE);
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if (buffer_mode == IOBF_BUFFER_MODE_NONE)
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{
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struct fd * fd = __fd[file->iob_Descriptor];
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__fd_lock(fd);
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if (FLAG_IS_SET(fd->fd_Flags, FDF_IS_INTERACTIVE))
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buffer_mode = IOBF_BUFFER_MODE_LINE;
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__fd_unlock(fd);
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}
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total_size = strlen(s);
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if (total_size > 0)
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{
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if (buffer_mode == IOBF_BUFFER_MODE_LINE)
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{
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while (total_size > 0)
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{
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/* Is there still room in the write buffer to store
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* more of the string?
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*/
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if (file->iob_BufferWriteBytes < file->iob_BufferSize)
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{
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unsigned char * buffer = &file->iob_Buffer[file->iob_BufferWriteBytes];
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size_t num_buffer_bytes;
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const char * lf;
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/* Give the user a chance to abort what could otherwise
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* become an uninterrupted series of copying operations.
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*/
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if (__check_abort_enabled)
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__check_abort();
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/* Store only as many characters as will fit into the write buffer. */
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assert( file->iob_BufferSize >= file->iob_BufferWriteBytes );
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num_buffer_bytes = file->iob_BufferSize - file->iob_BufferWriteBytes;
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if (total_size < num_buffer_bytes)
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num_buffer_bytes = total_size;
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/* Try to find a line feed in the string. If there is one,
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* reduce the number of characters to write to the sequence
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* which ends with the line feed character.
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*/
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lf = memchr(s, '\n', num_buffer_bytes);
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if (lf != NULL)
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{
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assert( (size_t)(lf + 1 - s) <= num_buffer_bytes );
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num_buffer_bytes = lf + 1 - s;
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}
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assert( num_buffer_bytes > 0 );
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memmove(buffer, s, num_buffer_bytes);
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s += num_buffer_bytes;
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assert( file->iob_BufferWriteBytes + num_buffer_bytes <= file->iob_BufferSize );
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file->iob_BufferWriteBytes += num_buffer_bytes;
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/* Write the buffer to disk if it's full or contains a line feed. */
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if ((lf != NULL || __iob_write_buffer_is_full(file)) && __flush_iob_write_buffer(file) < 0)
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{
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/* Abort with error. */
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goto out;
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}
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/* Stop as soon as no further data needs to be written. */
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assert( total_size >= num_buffer_bytes );
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total_size -= num_buffer_bytes;
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if (total_size == 0)
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break;
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/* If there is again room in the output buffer,
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* repeat this optimization.
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*/
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if (file->iob_BufferWriteBytes < file->iob_BufferSize)
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continue;
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}
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c = (*s++);
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if (__putc_line_buffered(c, (FILE *)file) == EOF)
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goto out;
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total_size--;
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}
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}
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else if (buffer_mode == IOBF_BUFFER_MODE_NONE)
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{
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ssize_t num_bytes_written;
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/* We bypass the buffer entirely. */
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num_bytes_written = write(file->iob_Descriptor, s, total_size);
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if (num_bytes_written == -1)
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{
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SET_FLAG(file->iob_Flags, IOBF_ERROR);
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goto out;
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}
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}
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else
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{
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while (total_size > 0)
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{
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/* If there is more data to be written than the write buffer will hold
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* and the write buffer is empty anyway, then we'll bypass the write
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* buffer entirely.
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*/
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if (file->iob_BufferWriteBytes == 0 && total_size >= (size_t)file->iob_BufferSize)
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{
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ssize_t num_bytes_written;
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/* We bypass the buffer entirely. */
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num_bytes_written = write(file->iob_Descriptor, s, total_size);
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if (num_bytes_written == -1)
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{
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SET_FLAG(file->iob_Flags, IOBF_ERROR);
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goto out;
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}
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break;
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}
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/* Is there still room in the write buffer to store
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* more of the string?
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*/
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if (file->iob_BufferWriteBytes < file->iob_BufferSize)
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{
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unsigned char * buffer = &file->iob_Buffer[file->iob_BufferWriteBytes];
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size_t num_buffer_bytes;
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/* Give the user a chance to abort what could otherwise
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* become an uninterrupted series of copying operations.
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*/
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if (__check_abort_enabled)
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__check_abort();
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/* Store only as many characters as will fit into the write buffer. */
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assert( file->iob_BufferSize >= file->iob_BufferWriteBytes );
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num_buffer_bytes = file->iob_BufferSize - file->iob_BufferWriteBytes;
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if (total_size < num_buffer_bytes)
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num_buffer_bytes = total_size;
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assert( num_buffer_bytes > 0 );
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memmove(buffer, s, num_buffer_bytes);
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s += num_buffer_bytes;
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assert( file->iob_BufferWriteBytes + num_buffer_bytes <= file->iob_BufferSize );
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file->iob_BufferWriteBytes += num_buffer_bytes;
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/* Write a full buffer to disk. */
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if (__iob_write_buffer_is_full(file) && __flush_iob_write_buffer(file) < 0)
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{
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/* Abort with error. */
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goto out;
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}
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/* Stop as soon as no further data needs to be written. */
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assert( total_size >= num_buffer_bytes );
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total_size -= num_buffer_bytes;
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if (total_size == 0)
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break;
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/* If there is again room in the output buffer,
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* try this optimization again.
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*/
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if (file->iob_BufferWriteBytes < file->iob_BufferSize)
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continue;
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}
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c = (*s++);
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if (__putc_fully_buffered(c, (FILE *)file) == EOF)
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goto out;
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total_size--;
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}
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}
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}
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if (line_feed != 0 && __putc(line_feed, stream, buffer_mode) == EOF)
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goto out;
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result = OK;
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out:
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/* Note: if buffering is disabled for this stream, then we still
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* may have buffered data around, queued to be printed right now.
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* This is intended to improve performance as it takes more effort
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* to write a single character to a file than to write a bunch.
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*/
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if (result == 0 && (file->iob_Flags & IOBF_BUFFER_MODE) == IOBF_BUFFER_MODE_NONE)
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{
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if (__iob_write_buffer_is_valid(file) && __flush_iob_write_buffer(file) < 0)
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{
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SHOWMSG("couldn't flush the write buffer");
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result = EOF;
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}
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}
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if (stream != NULL)
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funlockfile(stream);
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RETURN(result);
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return(result);
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}
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/****************************************************************************/
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int
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fputs(const char *s, FILE *stream)
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{
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int result;
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ENTER();
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SHOWSTRING(s);
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SHOWPOINTER(stream);
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assert( s != NULL && stream != NULL );
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if (__check_abort_enabled)
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__check_abort();
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#if defined(CHECK_FOR_NULL_POINTERS)
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{
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if (s == NULL || stream == NULL)
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{
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__set_errno(EFAULT);
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goto out;
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}
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}
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#endif /* CHECK_FOR_NULL_POINTERS */
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result = __fputs(s, 0, stream);
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RETURN(result);
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return(result);
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}
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