ref: 82ff0b70095060015274ae80c8dd66bb55011c26
dir: /src/strife/m_saves.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2010 James Haley, Samuel Villarreal
//
// 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.
//
// DESCRIPTION:
//
// [STRIFE] New Module
//
// Strife Hub Saving Code
//
// For GNU C and POSIX targets, dirent.h should be available. Otherwise, for
// Visual C++, we need to include the win_opendir module.
#if defined(_MSC_VER)
#include <win_opendir.h>
#elif defined(__GNUC__) || defined(POSIX)
#include <dirent.h>
#elif defined(__WATCOMC__)
#include <direct.h>
#else
#error Need an include for dirent.h!
#endif
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "z_zone.h"
#include "i_system.h"
#include "d_player.h"
#include "deh_str.h"
#include "doomstat.h"
#include "m_misc.h"
#include "m_saves.h"
#include "p_dialog.h"
//
// File Paths
//
// Strife maintains multiple file paths related to savegames.
//
char *savepath; // The actual path of the selected saveslot
char *savepathtemp; // The path of the temporary saveslot (strfsav6.ssg)
char *loadpath; // Path used while loading the game
char character_name[CHARACTER_NAME_LEN]; // Name of "character" for saveslot
//
// ClearTmp
//
// Clear the temporary save directory
//
void ClearTmp(void)
{
DIR *sp2dir = NULL;
struct dirent *f = NULL;
if(savepathtemp == NULL)
I_Error("you fucked up savedir man!");
if(!(sp2dir = opendir(savepathtemp)))
I_Error("ClearTmp: Couldn't open dir %s", savepathtemp);
while((f = readdir(sp2dir)))
{
char *filepath = NULL;
// haleyjd: skip "." and ".." without assuming they're the
// first two entries like the original code did.
if(!strcmp(f->d_name, ".") || !strcmp(f->d_name, ".."))
continue;
// haleyjd: use M_SafeFilePath, not sprintf
filepath = M_SafeFilePath(savepathtemp, f->d_name);
remove(filepath);
Z_Free(filepath);
}
closedir(sp2dir);
}
//
// ClearSlot
//
// Clear a single save slot folder
//
void ClearSlot(void)
{
DIR *spdir = NULL;
struct dirent *f = NULL;
if(savepath == NULL)
I_Error("userdir is fucked up man!");
if(!(spdir = opendir(savepath)))
I_Error("ClearSlot: Couldn't open dir %s", savepath);
while((f = readdir(spdir)))
{
char *filepath = NULL;
if(!strcmp(f->d_name, ".") || !strcmp(f->d_name, ".."))
continue;
// haleyjd: use M_SafeFilePath, not sprintf
filepath = M_SafeFilePath(savepath, f->d_name);
remove(filepath);
Z_Free(filepath);
}
closedir(spdir);
}
//
// FromCurr
//
// Copying files from savepathtemp to savepath
//
void FromCurr(void)
{
DIR *sp2dir = NULL;
struct dirent *f = NULL;
if(!(sp2dir = opendir(savepathtemp)))
I_Error("FromCurr: Couldn't open dir %s", savepathtemp);
while((f = readdir(sp2dir)))
{
byte *filebuffer = NULL;
int filelen = 0;
char *srcfilename = NULL;
char *dstfilename = NULL;
// haleyjd: skip "." and ".." without assuming they're the
// first two entries like the original code did.
if(!strcmp(f->d_name, ".") || !strcmp(f->d_name, ".."))
continue;
// haleyjd: use M_SafeFilePath, NOT sprintf.
srcfilename = M_SafeFilePath(savepathtemp, f->d_name);
dstfilename = M_SafeFilePath(savepath, f->d_name);
filelen = M_ReadFile(srcfilename, &filebuffer);
M_WriteFile(dstfilename, filebuffer, filelen);
Z_Free(filebuffer);
Z_Free(srcfilename);
Z_Free(dstfilename);
}
closedir(sp2dir);
}
//
// ToCurr
//
// Copying files from savepath to savepathtemp
//
void ToCurr(void)
{
DIR *spdir = NULL;
struct dirent *f = NULL;
ClearTmp();
// BUG: Rogue copypasta'd this error message, which is why we don't know
// the real original name of this function.
if(!(spdir = opendir(savepath)))
I_Error("ClearSlot: Couldn't open dir %s", savepath);
while((f = readdir(spdir)))
{
byte *filebuffer = NULL;
int filelen = 0;
char *srcfilename = NULL;
char *dstfilename = NULL;
if(!strcmp(f->d_name, ".") || !strcmp(f->d_name, ".."))
continue;
// haleyjd: use M_SafeFilePath, NOT sprintf.
srcfilename = M_SafeFilePath(savepath, f->d_name);
dstfilename = M_SafeFilePath(savepathtemp, f->d_name);
filelen = M_ReadFile(srcfilename, &filebuffer);
M_WriteFile(dstfilename, filebuffer, filelen);
Z_Free(filebuffer);
Z_Free(srcfilename);
Z_Free(dstfilename);
}
closedir(spdir);
}
//
// M_SaveMoveMapToHere
//
// Moves a map to the "HERE" save.
//
void M_SaveMoveMapToHere(void)
{
char *mapsave = NULL;
char *heresave = NULL;
char tmpnum[33];
// haleyjd: no itoa available...
M_snprintf(tmpnum, sizeof(tmpnum), "%d", gamemap);
// haleyjd: use M_SafeFilePath, not sprintf
mapsave = M_SafeFilePath(savepath, tmpnum);
heresave = M_SafeFilePath(savepath, "here");
// haleyjd: use M_FileExists, not access
if(M_FileExists(mapsave))
{
remove(heresave);
rename(mapsave, heresave);
}
Z_Free(mapsave);
Z_Free(heresave);
}
//
// M_SaveMoveHereToMap
//
// Moves the "HERE" save to a map.
//
void M_SaveMoveHereToMap(void)
{
char *mapsave = NULL;
char *heresave = NULL;
char tmpnum[33];
// haleyjd: no itoa available...
M_snprintf(tmpnum, sizeof(tmpnum), "%d", gamemap);
mapsave = M_SafeFilePath(savepathtemp, tmpnum);
heresave = M_SafeFilePath(savepathtemp, "here");
if(M_FileExists(heresave))
{
remove(mapsave);
rename(heresave, mapsave);
}
Z_Free(mapsave);
Z_Free(heresave);
}
//
// M_SaveMisObj
//
// Writes the mission objective into the MIS_OBJ file.
//
boolean M_SaveMisObj(const char *path)
{
boolean result;
char *destpath = NULL;
// haleyjd 20110210: use M_SafeFilePath, not sprintf
destpath = M_SafeFilePath(path, "mis_obj");
result = M_WriteFile(destpath, mission_objective, OBJECTIVE_LEN);
Z_Free(destpath);
return result;
}
//
// M_ReadMisObj
//
// Reads the mission objective from the MIS_OBJ file.
//
void M_ReadMisObj(void)
{
FILE *f = NULL;
char *srcpath = NULL;
// haleyjd: use M_SafeFilePath, not sprintf
srcpath = M_SafeFilePath(savepathtemp, "mis_obj");
if((f = fopen(srcpath, "rb")))
{
int retval = fread(mission_objective, 1, OBJECTIVE_LEN, f);
fclose(f);
if (retval != OBJECTIVE_LEN)
{
I_Error("M_ReadMisObj: error while reading mission objective");
}
}
Z_Free(srcpath);
}
//=============================================================================
//
// Original Routines
//
// haleyjd - None of the below code is derived from Strife itself, but has been
// adapted or created in order to provide secure, portable filepath handling
// for the purposes of savegame support. This is partially needed to allow for
// differences in Choco due to it being multiplatform. The rest exists because
// I cannot stand programming in an impoverished ANSI C environment that
// calls sprintf on fixed-size buffers. :P
//
//
// M_Calloc
//
// haleyjd 20110210 - original routine
// Because Choco doesn't have Z_Calloc O_o
//
void *M_Calloc(size_t n1, size_t n2)
{
return (n1 *= n2) ? memset(Z_Malloc(n1, PU_STATIC, NULL), 0, n1) : NULL;
}
//
// M_StringAlloc
//
// haleyjd: This routine takes any number of strings and a number of extra
// characters, calculates their combined length, and calls Z_Alloca to create
// a temporary buffer of that size. This is extremely useful for allocation of
// file paths, and is used extensively in d_main.c. The pointer returned is
// to a temporary Z_Alloca buffer, which lives until the next main loop
// iteration, so don't cache it. Note that this idiom is not possible with the
// normal non-standard alloca function, which allocates stack space.
//
// [STRIFE] - haleyjd 20110210
// This routine is taken from the Eternity Engine and adapted to do without
// Z_Alloca. I need secure string concatenation for filepath handling. The
// only difference from use in EE is that the pointer returned in *str must
// be manually freed.
//
int M_StringAlloc(char **str, int numstrs, size_t extra, const char *str1, ...)
{
va_list args;
size_t len = extra;
if(numstrs < 1)
I_Error("M_StringAlloc: invalid input\n");
len += strlen(str1);
--numstrs;
if(numstrs != 0)
{
va_start(args, str1);
while(numstrs != 0)
{
const char *argstr = va_arg(args, const char *);
len += strlen(argstr);
--numstrs;
}
va_end(args);
}
++len;
*str = (char *)(M_Calloc(1, len));
return len;
}
//
// M_NormalizeSlashes
//
// Remove trailing slashes, translate backslashes to slashes
// The string to normalize is passed and returned in str
//
// killough 11/98: rewritten
//
// [STRIFE] - haleyjd 20110210: Borrowed from Eternity and adapted to respect
// the DIR_SEPARATOR define used by Choco Doom. This routine originated in
// BOOM.
//
void M_NormalizeSlashes(char *str)
{
char *p;
// Convert all slashes/backslashes to DIR_SEPARATOR
for(p = str; *p; p++)
{
if((*p == '/' || *p == '\\') && *p != DIR_SEPARATOR)
*p = DIR_SEPARATOR;
}
// Remove trailing slashes
while(p > str && *--p == DIR_SEPARATOR)
*p = 0;
// Collapse multiple slashes
for(p = str; (*str++ = *p); )
if(*p++ == DIR_SEPARATOR)
while(*p == DIR_SEPARATOR)
p++;
}
//
// M_SafeFilePath
//
// haleyjd 20110210 - original routine.
// This routine performs safe, portable concatenation of a base file path
// with another path component or file name. The returned string is Z_Malloc'd
// and should be freed when it has exhausted its usefulness.
//
char *M_SafeFilePath(const char *basepath, const char *newcomponent)
{
int newstrlen = 0;
char *newstr = NULL;
if (!strcmp(basepath, ""))
{
basepath = ".";
}
// Always throw in a slash. M_NormalizeSlashes will remove it in the case
// that either basepath or newcomponent includes a redundant slash at the
// end or beginning respectively.
newstrlen = M_StringAlloc(&newstr, 3, 1, basepath, "/", newcomponent);
M_snprintf(newstr, newstrlen, "%s/%s", basepath, newcomponent);
M_NormalizeSlashes(newstr);
return newstr;
}
//
// M_CreateSaveDirs
//
// haleyjd 20110210: Vanilla Strife went tits-up if it didn't have the full set
// of save folders which were created externally by the installer. fraggle says
// that's no good for Choco purposes, and I agree, so this routine will create
// the full set of folders under the configured savegamedir.
//
void M_CreateSaveDirs(const char *savedir)
{
int i;
for(i = 0; i < 7; i++)
{
char *compositedir;
// compose the full path by concatenating with savedir
compositedir = M_SafeFilePath(savedir, M_MakeStrifeSaveDir(i, ""));
M_MakeDirectory(compositedir);
Z_Free(compositedir);
}
}
//
// M_MakeStrifeSaveDir
//
// haleyjd 20110211: Convenience routine
//
char *M_MakeStrifeSaveDir(int slotnum, const char *extra)
{
static char tmpbuffer[32];
M_snprintf(tmpbuffer, sizeof(tmpbuffer),
"strfsav%d.ssg%s", slotnum, extra);
return tmpbuffer;
}
//
// M_GetFilePath
//
// haleyjd: STRIFE-FIXME: Temporary?
// Code borrowed from Eternity, and modified to return separator char
//
char M_GetFilePath(const char *fn, char *dest, size_t len)
{
boolean found_slash = false;
char *p;
char sepchar = '\0';
memset(dest, 0, len);
p = dest + len - 1;
M_StringCopy(dest, fn, len);
while(p >= dest)
{
if(*p == '/' || *p == '\\')
{
sepchar = *p;
found_slash = true; // mark that the path ended with a slash
*p = '\0';
break;
}
*p = '\0';
p--;
}
// haleyjd: in the case that no slash was ever found, yet the
// path string is empty, we are dealing with a file local to the
// working directory. The proper path to return for such a string is
// not "", but ".", since the format strings add a slash now. When
// the string is empty but a slash WAS found, we really do want to
// return the empty string, since the path is relative to the root.
if(!found_slash && *dest == '\0')
*dest = '.';
// if a separator is not found, default to forward, because Windows
// supports that too.
if(sepchar == '\0')
sepchar = '/';
return sepchar;
}
// EOF