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/* $OpenBSD: emit.c,v 1.6 2004/11/29 06:20:03 jsg Exp $ */
/* $NetBSD: emit.c,v 1.2 1995/07/03 21:24:00 cgd Exp $ */
/*
* Copyright (c) 1994, 1995 Jochen Pohl
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jochen Pohl for
* The NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: emit.c,v 1.6 2004/11/29 06:20:03 jsg Exp $";
#endif
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <err.h>
#include "lint.h"
/* name and handle of output file */
static const char *loname;
static FILE *lout;
/* output buffer data */
ob_t ob;
static void outxbuf(void);
/*
* initialize output
*/
void
outopen(name)
const char *name;
{
loname = name;
/* Ausgabedatei oeffnen */
if ((lout = fopen(name, "w")) == NULL)
err(1, "cannot open '%s'", name);
/* Ausgabepuffer anlegen */
ob.o_len = 1024;
ob.o_end = (ob.o_buf = ob.o_nxt = xmalloc(ob.o_len)) + ob.o_len;
}
/*
* flush output buffer and close file
*/
void
outclose()
{
outclr();
if (fclose(lout) == EOF)
err(1, "cannot close '%s'", loname);
}
/*
* resize output buffer
*/
static void
outxbuf()
{
ptrdiff_t coffs;
coffs = ob.o_nxt - ob.o_buf;
ob.o_len *= 2;
ob.o_end = (ob.o_buf = xrealloc(ob.o_buf, ob.o_len)) + ob.o_len;
ob.o_nxt = ob.o_buf + coffs;
}
/*
* reset output buffer
* if it is not empty, it is flushed
*/
void
outclr()
{
size_t sz;
if (ob.o_buf != ob.o_nxt) {
outchar('\n');
sz = ob.o_nxt - ob.o_buf;
if (sz > ob.o_len)
errx(1, "internal error: outclr() 1");
if (fwrite(ob.o_buf, sz, 1, lout) != 1)
err(1, "cannot write to %s", loname);
ob.o_nxt = ob.o_buf;
}
}
/*
* write a character to the output buffer
*/
void
outchar(c)
int c;
{
if (ob.o_nxt == ob.o_end)
outxbuf();
*ob.o_nxt++ = (char)c;
}
/*
* write a character to the output buffer, qouted if necessary
*/
void
outqchar(c)
int c;
{
if (isprint(c) && c != '\\' && c != '"' && c != '\'') {
outchar(c);
} else {
outchar('\\');
switch (c) {
case '\\':
outchar('\\');
break;
case '"':
outchar('"');
break;
case '\'':
outchar('\'');
break;
case '\b':
outchar('b');
break;
case '\t':
outchar('t');
break;
case '\n':
outchar('n');
break;
case '\f':
outchar('f');
break;
case '\r':
outchar('r');
break;
case '\v':
outchar('v');
break;
case '\a':
outchar('a');
break;
default:
outchar((((u_int)c >> 6) & 07) + '0');
outchar((((u_int)c >> 3) & 07) + '0');
outchar((c & 07) + '0');
break;
}
}
}
/*
* write a strint to the output buffer
* the string must not contain any characters which
* should be quoted
*/
void
outstrg(s)
const char *s;
{
while (*s != '\0') {
if (ob.o_nxt == ob.o_end)
outxbuf();
*ob.o_nxt++ = *s++;
}
}
/*
* write an integer value to toe output buffer
*/
void
outint(i)
int i;
{
if ((ob.o_end - ob.o_nxt) < 12)
outxbuf();
snprintf(ob.o_nxt, ob.o_end - ob.o_nxt, "%d", i);
ob.o_nxt += strlen(ob.o_nxt);
}
/*
* write the name of a symbol to the output buffer
* the name is preceded by its length
*/
void
outname(name)
const char *name;
{
if (name == NULL)
errx(1, "internal error: outname() 1");
outint((int)strlen(name));
outstrg(name);
}
/*
* write the name of the .c source
*/
void
outsrc(name)
const char *name;
{
outclr();
outchar('S');
outstrg(name);
}
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