diff options
Diffstat (limited to 'src/strife/deh_text.c')
-rw-r--r-- | src/strife/deh_text.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/strife/deh_text.c b/src/strife/deh_text.c new file mode 100644 index 00000000..31e23db2 --- /dev/null +++ b/src/strife/deh_text.c @@ -0,0 +1,127 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// Copyright(C) 2005 Simon Howard +// +// 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. +// +//----------------------------------------------------------------------------- +// +// Parses Text substitution sections in dehacked files +// +//----------------------------------------------------------------------------- + +#include <stdio.h> +#include <string.h> + +#include "doomtype.h" + +#include "z_zone.h" + +#include "deh_defs.h" +#include "deh_io.h" +#include "deh_main.h" + +// Given a string length, find the maximum length of a +// string that can replace it. + +static int TXT_MaxStringLength(int len) +{ + // Enough bytes for the string and the NUL terminator + + len += 1; + + // All strings in doom.exe are on 4-byte boundaries, so we may be able + // to support a slightly longer string. + // Extend up to the next 4-byte boundary + + len += (4 - (len % 4)) % 4; + + // Less one for the NUL terminator. + + return len - 1; +} + +static void *DEH_TextStart(deh_context_t *context, char *line) +{ + char *from_text, *to_text; + int fromlen, tolen; + int i; + + if (sscanf(line, "Text %i %i", &fromlen, &tolen) != 2) + { + DEH_Warning(context, "Parse error on section start"); + return NULL; + } + + // Only allow string replacements that are possible in Vanilla Doom. + // Chocolate Doom is unforgiving! + + if (!deh_allow_long_strings && tolen > TXT_MaxStringLength(fromlen)) + { + DEH_Error(context, "Replacement string is longer than the maximum " + "possible in doom.exe"); + return NULL; + } + + from_text = Z_Malloc(fromlen + 1, PU_STATIC, NULL); + to_text = Z_Malloc(tolen + 1, PU_STATIC, NULL); + + // read in the "from" text + + for (i=0; i<fromlen; ++i) + { + int c; + + c = DEH_GetChar(context); + + from_text[i] = c; + } + + from_text[fromlen] = '\0'; + + // read in the "to" text + + for (i=0; i<tolen; ++i) + { + int c; + + c = DEH_GetChar(context); + + to_text[i] = c; + } + to_text[tolen] = '\0'; + + DEH_AddStringReplacement(from_text, to_text); + + return NULL; +} + +static void DEH_TextParseLine(deh_context_t *context, char *line, void *tag) +{ + // not used +} + +deh_section_t deh_section_text = +{ + "Text", + NULL, + DEH_TextStart, + DEH_TextParseLine, + NULL, + NULL, +}; + |