scummvm-cursorfix/engines/glk/tads/tads2/error_handling.cpp

/* 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_handling.h"

namespace Glk {
namespace TADS {
namespace TADS2 {


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

	while (*fmt != '\0' && outbufl > 1)
	{
		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;
				len = 0;
				break;

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

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

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

			case 's':
				p = argv[argi].errastr;
				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 != 0)
		{
			if (outbufl >= len)
			{
				memcpy(outbuf, p, (size_t)len);
				outbufl -= len;
				outbuf += len;
			}
			else if (outbufl > 1)
			{
				memcpy(outbuf, p, (size_t)outbufl - 1);
				outbufl = 1;
			}
			outlen += len;
		}
		++fmt;
	}

	/* add a null terminator */
	if (outbufl != 0)
		*outbuf++ = '\0';

	/* return the length */
	return outlen;
}

#if defined(DEBUG) && !defined(ERR_NO_MACRO)
#error longjmp unsupported in ScummVM
#endif /* DEBUG */



#ifdef ERR_NO_MACRO

/* base error signal function */
void errsign(errcxdef *ctx, int e, const char *facility)
{
	strncpy(ctx->errcxptr->errfac, facility, ERRFACMAX);
	ctx->errcxptr->errfac[ERRFACMAX] = '\0';
	ctx->errcxofs = 0;
#if 0
	longjmp(ctx->errcxptr->errbuf, e);
#else
	error("Error - %s", facility);
#endif
}

/* signal an error with no arguments */
void errsigf(errcxdef *ctx, const char *facility, int e)
{
	errargc(ctx, 0);
	errsign(ctx, e, facility);
}

/* enter a string argument */
char *errstr(errcxdef *ctx, const char *str, int len)
{
	char *ret = &ctx->errcxbuf[ctx->errcxofs];

	memcpy(ret, str, (size_t)len);
	ret[len] = '\0';
	ctx->errcxofs += len + 1;
	return(ret);
}

/* resignal current error */
void errrse1(errcxdef *ctx, errdef *fr)
{
	errargc(ctx, fr->erraac);
	memcpy(ctx->errcxptr->erraav, fr->erraav,
		   (size_t)(fr->erraac * sizeof(erradef)));
	errsign(ctx, fr->errcode, fr->errfac);
}

/* log an error: base function */
void errlogn(errcxdef *ctx, int err, const char *facility)
{
	ctx->errcxofs = 0;
	(*ctx->errcxlog)(ctx->errcxlgc, facility, err, ctx->errcxptr->erraac,
					 ctx->errcxptr->erraav);
}

/* log an error with no arguments */
void errlogf(errcxdef *ctx, const char *facility, int err)
{
	errargc(ctx, 0);
	errlogn(ctx, err, facility);
}

#endif /* ERR_NO_MACRO */

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