177 lines
3.9 KiB
C
177 lines
3.9 KiB
C
/* $NetBSD: emit.c,v 1.16 2021/09/04 14:48:27 rillig Exp $ */
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/*
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* Copyright (c) 1994, 1995 Jochen Pohl
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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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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jochen Pohl for
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* The NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if defined(__RCSID) && !defined(lint)
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__RCSID("$NetBSD: emit.c,v 1.16 2021/09/04 14:48:27 rillig Exp $");
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "lint.h"
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/* name and handle of output file */
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static const char *loname;
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static FILE *lout;
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/* output buffer data */
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static ob_t ob;
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static void outxbuf(void);
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/*
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* initialize output
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*/
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void
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outopen(const char *name)
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{
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loname = name;
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/* Open output file */
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if ((lout = fopen(name, "w")) == NULL)
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err(1, "cannot open '%s'", name);
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/* Create output buffer */
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ob.o_len = 1024;
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ob.o_end = (ob.o_buf = ob.o_next = xmalloc(ob.o_len)) + ob.o_len;
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}
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/*
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* flush output buffer and close file
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*/
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void
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outclose(void)
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{
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outclr();
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if (fclose(lout) == EOF)
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err(1, "cannot close '%s'", loname);
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}
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/*
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* resize output buffer
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*/
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static void
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outxbuf(void)
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{
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ptrdiff_t coffs;
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coffs = ob.o_next - ob.o_buf;
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ob.o_len *= 2;
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ob.o_end = (ob.o_buf = xrealloc(ob.o_buf, ob.o_len)) + ob.o_len;
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ob.o_next = ob.o_buf + coffs;
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}
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/*
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* reset output buffer
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* if it is not empty, it is flushed
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*/
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void
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outclr(void)
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{
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size_t sz;
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if (ob.o_buf != ob.o_next) {
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outchar('\n');
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sz = ob.o_next - ob.o_buf;
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if (sz > ob.o_len)
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errx(1, "internal error: outclr() 1");
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if (fwrite(ob.o_buf, sz, 1, lout) != 1)
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err(1, "cannot write to %s", loname);
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ob.o_next = ob.o_buf;
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}
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}
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/*
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* write a character to the output buffer
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*/
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void
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outchar(char c)
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{
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if (ob.o_next == ob.o_end)
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outxbuf();
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*ob.o_next++ = c;
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}
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/*
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* write a string to the output buffer
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* the string must not contain any characters which
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* should be quoted
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*/
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void
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outstrg(const char *s)
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{
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while (*s != '\0') {
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if (ob.o_next == ob.o_end)
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outxbuf();
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*ob.o_next++ = *s++;
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}
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}
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/* write an integer value to the output buffer */
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void
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outint(int i)
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{
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if ((size_t)(ob.o_end - ob.o_next) < 3 * sizeof(int))
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outxbuf();
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ob.o_next += sprintf(ob.o_next, "%d", i);
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}
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/* write a name to the output buffer, preceded by its length */
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void
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outname(const char *name)
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{
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outint((int)strlen(name));
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outstrg(name);
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}
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/* write the name of the .c source */
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void
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outsrc(const char *name)
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{
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outclr();
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outchar('S');
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outstrg(name);
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}
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