#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <string.h>
#include <ctype.h>
#include "cvar.h"
#include "console.h"
#include "qargs.h"
#include "cmd.h"
#include "zone.h"
#include "quakefs.h"
#include "gib.h"
#include "gib_instructions.h"
#include "gib_interpret.h"
#include "gib_modules.h"
#include "gib_parse.h"
#include "gib_vars.h"
#include "gib_error.h"

int GIB_Get_Inst(char *start)
{
	int i;
	int len = 0;
	for (i = 0; start[i] != ';'; i++)
	{
		if (start[i] == '\'')
		{
			if ((len = GIB_End_Quote(start + i)) < 0)
				return len;
			else
				i += len;
		}
		if (start[i] == '\"')
		{
			if ((len = GIB_End_DQuote(start + i)) < 0)
				return len;
			else
				i += len;
		}
		if (start[i] == '{')
		{
			if ((len = GIB_End_Bracket(start + i)) < 0)
				return len;
			else
				i += len;
		}
		if (start[i] == 0)
			return 0;
	}
	return i;
}
int GIB_Get_Arg (char *start)
{
	int i;
	int ret = -2;

	if (*start == '\'')
	{
		ret = GIB_End_Quote(start) + 1;
	}
	if (*start == '\"')
	{
		ret = GIB_End_DQuote(start) + 1;                          
	}
	if (*start == '{')
	{
		ret = GIB_End_Bracket(start) + 1;
	}

	if (ret == -1)
		return -1;
	if (ret >= 0)
		return ret;

	for (i = 1; (start[i] != ' ' && start[i] != 0 && start[i] != '\'' && start[i] != '\"' && start[i] != '{') || start[i - 1] == '\\'; i++);
	return i;
}		
int GIB_End_Quote (char *start)
{
	int i;
	int len = 0;
	for (i = 1; start[i] != '\''; i++)
	{
		if (start[i - 1] != '\\')
		{
			if (start[i] == '\"')
			{
				if ((len = GIB_End_DQuote(start + i)) < 0)
					return len;
				else
					i += len;
			} 	
	
			if (start[i] == '{')
			{
				if ((len = GIB_End_Bracket(start +i)) < 0)
					return len;
				else
					i += len;
			}
			if (start[i] == 0)
				return -1;
		}
	}
	return i;	
}
int GIB_End_DQuote (char *start)
{
	int i, ret;	
	for (i = 1; start[i] != '\"'; i++)
	{
		if (start[i - 1] != '\\')
		{
			if (start[i] == '\'')
			{
				if ((ret = GIB_End_Quote(start + i)) < 0)
					return ret;
				else
					i += ret;
			}	
	
			if (start[i] == '{')
			{
				if ((ret = GIB_End_Bracket(start +i)) < 0)
					return ret;
				else
					i += ret;
			}
			if (start[i] == 0)
				return -1;
		}
	}
	return i;
}

int GIB_End_Bracket (char *start)
{
	int i, ret;
	for (i = 1; start[i] != '}'; i++)
	{
		if (start[i - 1] != '\\')
		{
			if (start[i] == '\'')
			{
				if ((ret = GIB_End_Quote(start + i)) < 0)
					return ret;
				else
					i += ret;
			}
			
			if (start[i] == '\"')
			{
				if ((ret = GIB_End_DQuote(start + i)) < 0)
					return ret;
				else
					i += ret;
			}
			
			if (start[i] == '{')
			{
				if ((ret = GIB_End_Bracket(start + i)) < 0)
					return ret;
				else
					i += ret;
			}

			if (start[i] == 0)
				return -1;
		}
	}
	return i;
}

gib_sub_t *GIB_Get_ModSub_Sub (char *modsub)
{
	gib_module_t *mod;
	gib_sub_t *sub;
	char *divider;

	if (!(divider = strstr(modsub, "::")))
		return 0;
	*divider = 0;
	mod = GIB_Find_Module (modsub);
	*divider = ':';
	if (!mod)
		return 0;
	sub = GIB_Find_Sub (mod, divider + 2);
	return sub;
}
gib_module_t *GIB_Get_ModSub_Mod (char *modsub)
{
	gib_module_t *mod;
	char *divider;

	if (!(divider = strstr(modsub, "::")))
		return 0;
	*divider = 0;
	mod = GIB_Find_Module (modsub);
	*divider = ':';
	return mod;
}

int GIB_ExpandEscapes (char *source)
{
	int i, m;
	for (i = 0, m = 0; i <= strlen(source); i++)
	{
		if (source[i] == '\\')
		{
			switch(source[++i])
			{
				case 0:
						return GIB_E_PARSE;
						break;
				case 'n':
				case 'N':
						source[m] = '\n';
						break;
				default:
						source[m] = source[i];
			}
		}
		else
			source[m] = source[i];
		m++;
	}
	return 0;
}