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/* $OpenBSD: misc.c,v 1.72 2022/05/21 01:21:29 deraadt Exp $ */
/* Copyright 1988,1990,1993,1994 by Paul Vixie
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1997,2000 by Internet Software Consortium, Inc.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <bitstring.h> /* for structs.h */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h> /* for structs.h */
#include "macros.h"
#include "structs.h"
#include "funcs.h"
#include "globals.h"
int LineNumber;
/* get_char(file) : like getc() but increment LineNumber on newlines
*/
int
get_char(FILE *file)
{
int ch;
ch = getc(file);
if (ch == '\n')
Set_LineNum(LineNumber + 1)
return (ch);
}
/* unget_char(ch, file) : like ungetc but do LineNumber processing
*/
void
unget_char(int ch, FILE *file)
{
ungetc(ch, file);
if (ch == '\n')
Set_LineNum(LineNumber - 1)
}
/* get_string(str, max, file, termstr) : like fgets() but
* (1) has terminator string which should include \n
* (2) will always leave room for the null
* (3) uses get_char() so LineNumber will be accurate
* (4) returns EOF or terminating character, whichever
*/
int
get_string(char *string, int size, FILE *file, char *terms)
{
int ch;
while ((ch = get_char(file)) != EOF && !strchr(terms, ch)) {
if (size > 1) {
*string++ = ch;
size--;
}
}
if (size > 0)
*string = '\0';
return (ch);
}
/* skip_comments(file) : read past comment (if any)
*/
void
skip_comments(FILE *file)
{
int ch;
while ((ch = get_char(file)) != EOF) {
/* ch is now the first character of a line.
*/
while (ch == ' ' || ch == '\t')
ch = get_char(file);
if (ch == EOF)
break;
/* ch is now the first non-blank character of a line.
*/
if (ch != '\n' && ch != '#')
break;
/* ch must be a newline or comment as first non-blank
* character on a line.
*/
while (ch != '\n' && ch != EOF)
ch = get_char(file);
/* ch is now the newline of a line which we're going to
* ignore.
*/
}
if (ch != EOF)
unget_char(ch, file);
}
/* char *first_word(char *s, char *t)
* return pointer to first word
* parameters:
* s - string we want the first word of
* t - terminators, implicitly including \0
* warnings:
* (1) this routine is fairly slow
* (2) it returns a pointer to static storage
*/
char *
first_word(char *s, char *t)
{
static char retbuf[2][MAX_TEMPSTR + 1]; /* sure wish C had GC */
static int retsel = 0;
char *rb, *rp;
/* select a return buffer */
retsel = 1-retsel;
rb = &retbuf[retsel][0];
rp = rb;
/* skip any leading terminators */
while (*s && (NULL != strchr(t, *s))) {
s++;
}
/* copy until next terminator or full buffer */
while (*s && (NULL == strchr(t, *s)) && (rp < &rb[MAX_TEMPSTR])) {
*rp++ = *s++;
}
/* finish the return-string and return it */
*rp = '\0';
return (rb);
}
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