/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "glk/tads/tads2/error.h"
#include "glk/tads/tads2/error_handling.h"
#include "glk/tads/tads2/tokenizer.h"

namespace Glk {
namespace TADS {
namespace TADS2 {

/* format an error message, sprintf-style, using an erradef array */
int errfmt(char *outbuf, int outbufl, const char *fmt, int argc, const erradef *argv) {
	int    outlen = 0;
	int    argi   = 0;
	int    len = 0;
	char   buf[20];
	const char  *p = nullptr;
	char   fmtchar;

	while (*fmt)
	{
		switch(*fmt)
		{
		case '\\':
			++fmt;
			len = 1;
			switch(*fmt)
			{
			case '\0':
				--fmt;
				break;
			case '\n':
				p = "\n";
				break;
			case '\t':
				p = "\t";
				break;
			default:
				p = fmt;
				break;
			}
			break;

		case '%':
			++fmt;
			fmtchar = *fmt;
			if (argi >= argc) fmtchar = 1;          /* too many - ignore it */
			switch(fmtchar)
			{
			case '\0':
				--fmt;
				break;

			case '%':
				p = "%";
				len = 1;
				break;

			case 'd':
				sprintf(buf, "%d", argv[argi].erraint);
				len = strlen(buf);
				p = buf;
				break;

			case 's':
				p = argv[argi].errastr;
				len = strlen(p);
				break;

			case 't':
				{
					int i;
					static struct
					{
						int   tokid;
						const char *toknam;
					} toklist[] =
					{
						{ TOKTSEM, "semicolon" },
						{ TOKTCOLON, "colon" },
						{ TOKTFUNCTION, "\"function\"" },
						{ TOKTCOMMA, "comma" },
						{ TOKTLBRACE, "left brace ('{')" },
						{ TOKTRPAR, "right paren (')')" },
						{ TOKTRBRACK, "right square bracket (']')" },
						{ TOKTWHILE, "\"while\"" },
						{ TOKTLPAR, "left paren ('(')" },
						{ TOKTEQ, "'='" },
						{ 0, (const char *)nullptr }
					};

					for (i = 0 ; toklist[i].toknam ; ++i)
					{
						if (toklist[i].tokid == argv[argi].erraint)
						{
							p = toklist[i].toknam;
							break;
						}
					}
					if (!toklist[i].toknam)
						p = "<unknown token>";
					len = strlen(p);
					break;
				}

			default:
				p = "";
				len = 0;
				--argi;
				break;
			}
			++argi;
			break;

		default:
			p = fmt;
			len = 1;
			break;
		}

		/* copy output that was set up above */
		if (len)
		{
			if (outbufl >= len)
			{
				memcpy(outbuf, p, (size_t)len);
				outbufl -= len;
				outbuf += len;
			}
			else if (outbufl)
			{
				memcpy(outbuf, p, (size_t)outbufl);
				outbufl = 0;
			}
			outlen += len;
		}
		++fmt;
	}

	if (outbufl) *outbuf++ = '\0';
	return(outlen);
}


#ifdef ERR_NO_MACRO

/* base error signal function */
void errsign(errcxdef *ctx, int e) {
	ctx->errcxofs = 0;
#if 0
	longjmp(ctx->errcxptr->errbuf, e);
#else
	error("errsign");
#endif
}

/* log an error: base function */
void errlogn(errcxdef *ctx, int err) {
	error("errlogn");
}

#endif /* ERR_NO_MACRO */

} // End of namespace TADS2
} // End of namespace TADS
} // End of namespace Glk
