ref: 10da45b90cba29506c142982e76abc35c39d5d26
dir: /src/deh_main.c/
// 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. // //----------------------------------------------------------------------------- // // Main dehacked code // //----------------------------------------------------------------------------- #include <ctype.h> #include "doomdef.h" #include "doomtype.h" #include "d_iwad.h" #include "m_argv.h" #include "deh_defs.h" #include "deh_io.h" static char *deh_signatures[] = { "Patch File for DeHackEd v2.3", "Patch File for DeHackEd v3.0", }; // deh_ammo.c: extern deh_section_t deh_section_ammo; // deh_cheat.c: extern deh_section_t deh_section_cheat; // deh_frame.c: extern deh_section_t deh_section_frame; // deh_misc.c: extern deh_section_t deh_section_misc; // deh_ptr.c: extern deh_section_t deh_section_pointer; // deh_sound.c extern deh_section_t deh_section_sound; // deh_text.c: extern deh_section_t deh_section_text; // deh_thing.c: extern deh_section_t deh_section_thing; // deh_weapon.c: extern deh_section_t deh_section_weapon; // If true, we can do long string replacements. boolean deh_allow_long_strings = false; // If true, we can do cheat replacements longer than the originals. boolean deh_allow_long_cheats = false; // If false, dehacked cheat replacements are ignored. boolean deh_apply_cheats = true; // // List of section types: // static deh_section_t *section_types[] = { &deh_section_ammo, &deh_section_cheat, &deh_section_frame, &deh_section_misc, &deh_section_pointer, &deh_section_sound, &deh_section_text, &deh_section_thing, &deh_section_weapon, }; void DEH_Checksum(md5_digest_t digest) { md5_context_t md5_context; unsigned int i; MD5_Init(&md5_context); for (i=0; i<arrlen(section_types); ++i) { if (section_types[i]->md5_hash != NULL) { section_types[i]->md5_hash(&md5_context); } } MD5_Final(digest, &md5_context); } // Called on startup to call the Init functions static void InitialiseSections(void) { unsigned int i; for (i=0; i<arrlen(section_types); ++i) { if (section_types[i]->init != NULL) { section_types[i]->init(); } } } // Given a section name, get the section structure which corresponds static deh_section_t *GetSectionByName(char *name) { unsigned int i; for (i=0; i<arrlen(section_types); ++i) { if (!strcasecmp(section_types[i]->name, name)) { return section_types[i]; } } return NULL; } // Is the string passed just whitespace? static boolean IsWhitespace(char *s) { for (; *s; ++s) { if (!isspace(*s)) return false; } return true; } // Strip whitespace from the start and end of a string static char *CleanString(char *s) { char *strending; // Leading whitespace while (*s && isspace(*s)) ++s; // Trailing whitespace strending = s + strlen(s) - 1; while (strlen(s) > 0 && isspace(*strending)) { *strending = '\0'; --strending; } return s; } // This pattern is used a lot of times in different sections, // an assignment is essentially just a statement of the form: // // Variable Name = Value // // The variable name can include spaces or any other characters. // The string is split on the '=', essentially. // // Returns true if read correctly boolean DEH_ParseAssignment(char *line, char **variable_name, char **value) { char *p; // find the equals p = strchr(line, '='); if (p == NULL && p-line > 2) { return false; } // variable name at the start // turn the '=' into a \0 to terminate the string here *p = '\0'; *variable_name = CleanString(line); // value immediately follows the '=' *value = CleanString(p+1); return true; } static boolean CheckSignatures(deh_context_t *context) { size_t i; char *line; // Read the first line line = DEH_ReadLine(context); if (line == NULL) { return false; } // Check all signatures to see if one matches for (i=0; i<arrlen(deh_signatures); ++i) { if (!strcmp(deh_signatures[i], line)) { return true; } } return false; } // Parses a comment string in a dehacked file. static void DEH_ParseComment(char *comment) { // Allow comments containing this special value to allow string // replacements longer than those permitted by DOS dehacked. // This allows us to use a dehacked patch for doing string // replacements for emulating Chex Quest. // // If you use this, your dehacked patch may not work in Vanilla // Doom. if (strstr(comment, "*allow-long-strings*") != NULL) { deh_allow_long_strings = true; } // Allow magic comments to allow longer cheat replacements than // those permitted by DOS dehacked. This is also for Chex // Quest. if (strstr(comment, "*allow-long-cheats*") != NULL) { deh_allow_long_cheats = true; } } // Parses a dehacked file by reading from the context static void DEH_ParseContext(deh_context_t *context) { deh_section_t *current_section = NULL; char section_name[20]; void *tag = NULL; char *line; // Read the header and check it matches the signature if (!CheckSignatures(context)) { DEH_Error(context, "This is not a valid dehacked patch file!"); } deh_allow_long_strings = false; deh_allow_long_cheats = false; // Read the file for (;;) { // read a new line line = DEH_ReadLine(context); // end of file? if (line == NULL) return; while (line[0] != '\0' && isspace(line[0])) ++line; if (line[0] == '#') { // comment DEH_ParseComment(line); continue; } if (IsWhitespace(line)) { if (current_section != NULL) { // end of section if (current_section->end != NULL) { current_section->end(context, tag); } //printf("end %s tag\n", current_section->name); current_section = NULL; } } else { if (current_section != NULL) { // parse this line current_section->line_parser(context, line, tag); } else { // possibly the start of a new section sscanf(line, "%19s", section_name); current_section = GetSectionByName(section_name); if (current_section != NULL) { tag = current_section->start(context, line); //printf("started %s tag\n", section_name); } else { //printf("unknown section name %s\n", section_name); } } } } } // Parses a dehacked file int DEH_LoadFile(char *filename) { deh_context_t *context; printf(" loading %s\n", filename); context = DEH_OpenFile(filename); if (context == NULL) { fprintf(stderr, "DEH_LoadFile: Unable to open %s\n", filename); return 0; } DEH_ParseContext(context); DEH_CloseFile(context); return 1; } // Checks the command line for -deh argument void DEH_Init(void) { char *filename; int p; InitialiseSections(); //! // @category mod // // Ignore cheats in dehacked files. // if (M_CheckParm("-nocheats") > 0) { deh_apply_cheats = false; } //! // @arg <files> // @category mod // // Load the given dehacked patch(es) // p = M_CheckParm("-deh"); if (p > 0) { ++p; while (p < myargc && myargv[p][0] != '-') { filename = D_TryFindWADByName(myargv[p]); DEH_LoadFile(filename); ++p; } } }