GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: libexec/tradcpp/output.c Lines: 47 79 59.5 %
Date: 2017-11-13 Branches: 36 72 50.0 %

Line Branch Exec Source
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/*-
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 * Copyright (c) 2010 The NetBSD Foundation, Inc.
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 * All rights reserved.
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 *
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 * This code is derived from software contributed to The NetBSD Foundation
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 * by David A. Holland.
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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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 * 1. 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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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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 * BE 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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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "utils.h"
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#include "mode.h"
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#include "place.h"
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#include "output.h"
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static int outputfd = -1;
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static bool incomment = false;
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static char *linebuf;
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static size_t linebufpos, linebufmax;
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static struct place linebufplace;
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static
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void
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output_open(void)
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{
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	if ((mode.output_file == NULL) || !strcmp(mode.output_file, "-")) {
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		outputfd = STDOUT_FILENO;
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	} else {
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		outputfd = open(mode.output_file, O_WRONLY|O_CREAT|O_TRUNC,
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				0664);
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		if (outputfd < 0) {
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			complain(NULL, "%s: %s",
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				 mode.output_file, strerror(errno));
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			die();
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		}
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	}
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}
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static
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void
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dowrite(const char *buf, size_t len)
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{
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	size_t done;
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	ssize_t result;
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	static unsigned write_errors = 0;
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	if (!mode.do_output) {
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		return;
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	}
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	if (outputfd < 0) {
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		output_open();
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	}
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	done = 0;
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	while (done < len) {
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		result = write(outputfd, buf+done, len-done);
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		if (result == -1) {
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			complain(NULL, "%s: write: %s",
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				 mode.output_file, strerror(errno));
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			complain_failed();
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			write_errors++;
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			if (write_errors > 5) {
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				complain(NULL, "%s: giving up",
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					 mode.output_file);
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				die();
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			}
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			/* XXX is this really a good idea? */
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			sleep(1);
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		}
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		done += (size_t)result;
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	}
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}
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static
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void
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filter_output(const char *buf, size_t len)
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{
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	size_t pos, start;
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	bool inesc = false;
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	bool inquote = false;
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	char quote = '\0';
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	start = 0;
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	for (pos = 0; pos < len - 1; pos++) {
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		if (!inquote && buf[pos] == '/' && buf[pos+1] == '*') {
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			if (!incomment) {
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				if (pos > start) {
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					dowrite(buf + start, pos - start);
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				}
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				start = pos;
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				pos += 2;
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				incomment = true;
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				/* cancel out the loop's pos++ */
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				pos--;
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				continue;
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			}
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		} else if (buf[pos] == '*' && buf[pos+1] == '/') {
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			if (incomment) {
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				pos += 2;
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				if (mode.output_retain_comments) {
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					dowrite(buf + start, pos - start);
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				}
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				start = pos;
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				incomment = false;
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				/* cancel out the loop's pos++ */
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				pos--;
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				continue;
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			}
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		}
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		if (incomment) {
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			/* nothing */
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		} else if (inesc) {
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			inesc = false;
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		} else if (buf[pos] == '\\') {
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			inesc = true;
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		} else if (!inquote && (buf[pos] == '"' || buf[pos] == '\'')) {
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			inquote = true;
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			quote = buf[pos];
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130267124
		} else if (inquote && buf[pos] == quote) {
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			inquote = false;
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		}
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	}
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	pos++;
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	if (pos > start) {
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		if (!incomment || mode.output_retain_comments) {
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			dowrite(buf + start, pos - start);
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		}
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	}
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}
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void
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output(const struct place *p, const char *buf, size_t len)
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{
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	size_t oldmax;
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	if (linebufpos + len > linebufmax) {
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		oldmax = linebufmax;
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		if (linebufmax == 0) {
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			linebufmax = 64;
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		}
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		while (linebufpos + len > linebufmax) {
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			linebufmax *= 2;
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		}
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		linebuf = dorealloc(linebuf, oldmax, linebufmax);
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	}
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	if (linebufpos == 0) {
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		linebufplace = *p;
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	}
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	memcpy(linebuf + linebufpos, buf, len);
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	linebufpos += len;
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95736146
	if (len == 1 && buf[0] == '\n') {
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		filter_output(linebuf, linebufpos);
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		linebufpos = 0;
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	}
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}
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void
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output_eof(void)
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{
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	if (mode.output_file != NULL && outputfd >= 0) {
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		close(outputfd);
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	}
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	outputfd = -1;
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}