/*
 *  Copyright (C) 2002-2007  The DOSBox Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU 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: support.cpp,v 1.32 2007/06/12 20:22:09 c2woody Exp $ */

#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "dosbox.h"
#include "debug.h"
#include "support.h"
#include "video.h"

/* 
	Ripped some source from freedos for this one.

*/


/*
 * replaces all instances of character o with character c
 */


void strreplace(char * str,char o,char n) {
	while (*str) {
		if (*str==o) *str=n;
		str++;
	}
}
char *ltrim(char *str) { 
	while (*str && isspace(*reinterpret_cast<unsigned char*>(str))) str++;
	return str;
}

char *rtrim(char *str) {
	char *p;
	p = strchr(str, '\0');
	while (--p >= str && isspace(*reinterpret_cast<unsigned char*>(p)));
	p[1] = '\0';
	return str;
}

char *trim(char *str) {
	return ltrim(rtrim(str));
}


bool ScanCMDBool(char * cmd,char const * const check) {
	char * scan=cmd;size_t c_len=strlen(check);
	while ((scan=strchr(scan,'/'))) {
		/* found a / now see behind it */
		scan++;
		if (strncasecmp(scan,check,c_len)==0 && (scan[c_len]==' ' || scan[c_len]=='\t' || scan[c_len]=='/' || scan[c_len]==0)) {
		/* Found a math now remove it from the string */
			memmove(scan-1,scan+c_len,strlen(scan+c_len)+1);
			trim(scan-1);
			return true;
		}
	}
	return false;
}

/* This scans the command line for a remaining switch and reports it else returns 0*/
char * ScanCMDRemain(char * cmd) {
	char * scan,*found;;
	if ((scan=found=strchr(cmd,'/'))) {
		while ( *scan && !isspace(*reinterpret_cast<unsigned char*>(scan)) ) scan++;
		*scan=0;
		return found;
	} else return 0; 
}

char * StripWord(char *&line) {
	char * scan=line;
	scan=ltrim(scan);
	if (*scan=='"') {
		char * end_quote=strchr(scan+1,'"');
		if (end_quote) {
			*end_quote=0;
			line=ltrim(++end_quote);
			return (scan+1);
		}
	}
	char * begin=scan;
	for (;char c=*scan;scan++) {
		if (isspace(*reinterpret_cast<unsigned char*>(&c))) {
			*scan++=0;
			break;
		}
	}
	line=scan;
	return begin;
}

Bits ConvDecWord(char * word) {
	bool negative=false;Bitu ret=0;
	if (*word=='-') {
		negative=true;
		word++;
	}
	while (char c=*word) {
		ret*=10;
		ret+=c-'0';
		word++;
	}
	if (negative) return 0-ret;
	else return ret;
}

Bits ConvHexWord(char * word) {
	Bitu ret=0;
	while (char c=toupper(*reinterpret_cast<unsigned char*>(word))) {
		ret*=16;
		if (c>='0' && c<='9') ret+=c-'0';
		else if (c>='A' && c<='F') ret+=10+(c-'A');
		word++;
	}
	return ret;
}

double ConvDblWord(char * word) {
	return 0.0f;
}


static char buf[1024];           //greater scope as else it doesn't always gets thrown right (linux/gcc2.95)
void E_Exit(const char * format,...) {
#if C_DEBUG && C_HEAVY_DEBUG
 	DEBUG_HeavyWriteLogInstruction();
#endif
	va_list msg;
	va_start(msg,format);
	vsprintf(buf,format,msg);
	va_end(msg);
	strcat(buf,"\n");

	throw(buf);
}