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128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2000 Pierangelo Masarati, <ando@sys-net.it>
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* All rights reserved.
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*
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* Permission is granted to anyone to use this software for any purpose
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* on any computer system, and to alter it and redistribute it, subject
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* to the following restrictions:
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*
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* 1. The author is not responsible for the consequences of use of this
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* software, no matter how awful, even if they arise from flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either by
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* explicit claim or by omission. Since few users ever read sources,
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* credits should appear in the documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not be
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* misrepresented as being the original software. Since few users
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* ever read sources, credits should appear in the documentation.
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*
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* 4. This notice may not be removed or altered.
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*
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******************************************************************************/
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#include <portable.h>
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#include "rewrite-int.h"
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static int
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parse_line(
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char **argv,
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int *argc,
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int maxargs,
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char *buf
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)
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{
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char *p, *begin;
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int in_quoted_field = 0, cnt = 0;
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char quote = '\0';
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for ( p = buf; isspace( p[ 0 ] ); p++ );
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if ( p[ 0 ] == '#' ) {
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return 0;
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}
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for ( begin = p; p[ 0 ] != '\0'; p++ ) {
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if ( p[ 0 ] == '\\' ) {
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p++;
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} else if ( p[ 0 ] == '\'' || p[ 0 ] == '\"') {
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if ( in_quoted_field && p[ 0 ] == quote ) {
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in_quoted_field = 1 - in_quoted_field;
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quote = '\0';
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p[ 0 ] = '\0';
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argv[ cnt ] = begin;
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if ( ++cnt == maxargs ) {
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*argc = cnt;
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return 1;
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}
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for ( p++; isspace( p[ 0 ] ); p++ );
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begin = p;
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p--;
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} else if ( !in_quoted_field ) {
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if ( p != begin ) {
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return -1;
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}
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begin++;
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in_quoted_field = 1 - in_quoted_field;
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quote = p[ 0 ];
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}
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} else if ( isspace( p[ 0 ] ) && !in_quoted_field ) {
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p[ 0 ] = '\0';
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argv[ cnt ] = begin;
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if ( ++cnt == maxargs ) {
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*argc = cnt;
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return 1;
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}
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for ( p++; isspace( p[ 0 ] ); p++ );
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begin = p;
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p--;
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}
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}
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*argc = cnt;
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return 1;
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}
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int
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rewrite_read(
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FILE *fin,
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struct rewrite_info *info
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)
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{
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char buf[ 1024 ];
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char *argv[11];
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int argc, lineno;
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/*
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* Empty rule at the beginning of the context
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*/
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for ( lineno = 0; fgets( buf, sizeof( buf ), fin ); lineno++ ) {
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switch ( parse_line( argv, &argc, sizeof( argv ) - 1, buf ) ) {
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case -1:
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return REWRITE_ERR;
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case 0:
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break;
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case 1:
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if ( strncasecmp( argv[ 0 ], "rewrite", 7 ) == 0 ) {
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int rc;
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rc = rewrite_parse( info, "file", lineno,
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argc, argv );
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if ( rc != REWRITE_SUCCESS ) {
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return rc;
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}
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}
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break;
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}
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}
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return REWRITE_SUCCESS;
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}
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