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deb-goldedplus/goldlib/gall/gcrckeyv.cpp

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2000-02-25 10:15:17 +00:00
// This may look like C code, but it is really -*- C++ -*-
// ------------------------------------------------------------------
// The Goldware Library
// Copyright (C) 1990-1999 Odinn Sorensen
// Copyright (C) 1999-2000 Alexander S. Aganichev
// ------------------------------------------------------------------
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this program; if not, write to the Free
// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
// MA 02111-1307, USA
// ------------------------------------------------------------------
// $Id$
// ------------------------------------------------------------------
// CRC-16, CRC-32 and Hashing
// ------------------------------------------------------------------
#include <gstrall.h>
#include <gcrcall.h>
// ------------------------------------------------------------------
// Split current value (val) into keyword (key) and new value
// If "eql" is true, the '=' char is a keyword separator char.
void getkeyvaleql(char** key, char** val, bool eql) {
// Skip leading whitespace
char *p = strskip_wht(*val);
// Get the keyword
switch(*p) {
// Strip "double" quotes
case '\"':
*key = ++p;
do {
p = strskip_to(p, '\"');
if(not *p or (*(p-1) != '\\'))
break;
else
p++;
} while(*p);
break;
// Strip 'single' quotes
case '\'':
*key = ++p;
do {
p = strskip_to(p, '\'');
if(not *p or (*(p-1) != '\\'))
break;
else
p++;
} while(*p);
break;
// Strip round brackets
case '(': /*)*/
*key = ++p;
p = strskip_to(p, /*(*/ ')');
break;
// Get straight keyword
default:
*key = p;
while(*p and not isspace(*p) and (*p != ',')) {
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if(eql and (*p == '='))
break;
p++;
}
}
// Nul-terminate keyword and remove trailing comma if any
if(*p) {
if((*p != '\"') and (*p != '\'') and (*p != /*(*/ ')')) {
char* q = p;
while(*(--q) == ',')
*q = NUL;
}
*p++ = NUL;
}
// Skip whitespace and '=' if any
p = strskip_wht(p);
if(eql and (*p == '='))
p = strskip_wht(++p);
// Get the value
*val = p;
// Handle comments, allowing ;'s in quoted strings
while(*p and *p != ';') {
if((*p == '\"') and (*(p-1) != '\\')) {
p++;
while(*p and not ((*p == '\"') and (*(p-1) != '\\')))
p++;
}
if(*p)
p++;
}
*p = NUL;
// Trim whitespace from end of value
p = *val;
if(*p) {
p = strskip_to(p, NUL);
while((*(--p) <= ' ') and *p)
*p = NUL;
}
strschg(*key, "\\\"", "\"");
}
// ------------------------------------------------------------------
// Split current value (val) into keyword (key) and new value
void getkeyval(char** key, char** val) {
getkeyvaleql(key, val, false);
}
// ------------------------------------------------------------------
// Get keyword and value and calculate/return CRC16 of keyword
word getkeyvalcrc(char** key, char** val) {
// First get keyword and value
getkeyvaleql(key, val, false);
// Init variables
char* p = *key;
word c = 0;
// Calculate CRC16 of keyword
while(*p)
c = updCrc16((byte)toupper(*p++), c);
// Return keyword CRC
return c;
}
// ------------------------------------------------------------------