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(svn r15144) -Codechange: make sure we don't run out of bounds while determining old savegame name 

Note this can't happen in current code
This commit is contained in:
smatz 2009-01-18 22:44:53 +00:00
parent a46245f21f
commit 3bceaf41b4
4 changed files with 23 additions and 16 deletions
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18
src/fios.cpp
View File

@ -41,7 +41,7 @@ extern void FiosGetDrives();
extern bool FiosGetDiskFreeSpace(const char *path, uint64 *tot);
/* get the name of an oldstyle savegame */
extern void GetOldSaveGameName(char *title, const char *path, const char *file);
extern void GetOldSaveGameName(const char *path, const char *file, char *title, const char *last);
/**
* Compare two FiosItem's. Used with qsort when sorting the file list.
@ -194,7 +194,7 @@ bool FileExists(const char *filename)
#endif
}
typedef FiosType fios_getlist_callback_proc(SaveLoadDialogMode mode, const char *filename, const char *ext, char *title);
typedef FiosType fios_getlist_callback_proc(SaveLoadDialogMode mode, const char *filename, const char *ext, char *title, const char *last);
/** Create a list of the files in a directory, according to some arbitrary rule.
* @param mode The mode we are in. Some modes don't allow 'parent'.
@ -265,7 +265,7 @@ static FiosItem *FiosGetFileList(SaveLoadDialogMode mode, fios_getlist_callback_
if ((t = strrchr(d_name, '.')) == NULL) continue;
fios_title[0] = '\0'; // reset the title;
FiosType type = callback_proc(mode, d_name, t, fios_title);
FiosType type = callback_proc(mode, d_name, t, fios_title, lastof(fios_title));
if (type != FIOS_TYPE_INVALID) {
fios = _fios_items.Append();
fios->mtime = sb.st_mtime;
@ -298,11 +298,12 @@ static FiosItem *FiosGetFileList(SaveLoadDialogMode mode, fios_getlist_callback_
* @param file Name of the file to check.
* @param ext A pointer to the extension identifier inside file
* @param title Buffer if a callback wants to lookup the title of the file; NULL to skip the lookup
* @param last Last available byte in buffer (to prevent buffer overflows); not used when title == NULL
* @return a FIOS_TYPE_* type of the found file, FIOS_TYPE_INVALID if not a savegame
* @see FiosGetFileList
* @see FiosGetSavegameList
*/
FiosType FiosGetSavegameListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title)
FiosType FiosGetSavegameListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title, const char *last)
{
/* Show savegame files
* .SAV OpenTTD saved game
@ -314,7 +315,7 @@ FiosType FiosGetSavegameListCallback(SaveLoadDialogMode mode, const char *file,
if (mode == SLD_LOAD_GAME || mode == SLD_LOAD_SCENARIO) {
if (strcasecmp(ext, ".ss1") == 0 || strcasecmp(ext, ".sv1") == 0 ||
strcasecmp(ext, ".sv2") == 0) {
if (title != NULL) GetOldSaveGameName(title, _fios_path, file);
if (title != NULL) GetOldSaveGameName(_fios_path, file, title, last);
return FIOS_TYPE_OLDFILE;
}
}
@ -348,11 +349,12 @@ void FiosGetSavegameList(SaveLoadDialogMode mode)
* @param file Name of the file to check.
* @param ext A pointer to the extension identifier inside file
* @param title Buffer if a callback wants to lookup the title of the file
* @param last Last available byte in buffer (to prevent buffer overflows)
* @return a FIOS_TYPE_* type of the found file, FIOS_TYPE_INVALID if not a scenario
* @see FiosGetFileList
* @see FiosGetScenarioList
*/
static FiosType FiosGetScenarioListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title)
static FiosType FiosGetScenarioListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title, const char *last)
{
/* Show scenario files
* .SCN OpenTTD style scenario file
@ -362,7 +364,7 @@ static FiosType FiosGetScenarioListCallback(SaveLoadDialogMode mode, const char
if (mode == SLD_LOAD_GAME || mode == SLD_LOAD_SCENARIO || mode == SLD_NEW_GAME) {
if (strcasecmp(ext, ".sv0") == 0 || strcasecmp(ext, ".ss0") == 0 ) {
GetOldSaveGameName(title, _fios_path, file);
GetOldSaveGameName(_fios_path, file, title, last);
return FIOS_TYPE_OLD_SCENARIO;
}
}
@ -391,7 +393,7 @@ void FiosGetScenarioList(SaveLoadDialogMode mode)
FiosGetFileList(mode, &FiosGetScenarioListCallback);
}
static FiosType FiosGetHeightmapListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title)
static FiosType FiosGetHeightmapListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title, const char *last)
{
/* Show heightmap files
* .PNG PNG Based heightmap files

2
src/fios.h
View File

@ -106,7 +106,7 @@ bool FiosDelete(const char *name);
/* Make a filename from a name */
void FiosMakeSavegameName(char *buf, const char *name, size_t size);
/* Determines type of savegame (or tells it is not a savegame) */
FiosType FiosGetSavegameListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title);
FiosType FiosGetSavegameListCallback(SaveLoadDialogMode mode, const char *file, const char *ext, char *title, const char *last);
int CDECL compare_FiosItems(const void *a, const void *b);

2
src/openttd.cpp
View File

@ -514,7 +514,7 @@ int ttd_main(int argc, char *argv[])
/* if the file doesn't exist or it is not a valid savegame, let the saveload code show an error */
const char *t = strrchr(_file_to_saveload.name, '.');
if (t != NULL) {
FiosType ft = FiosGetSavegameListCallback(SLD_LOAD_GAME, _file_to_saveload.name, t, NULL);
FiosType ft = FiosGetSavegameListCallback(SLD_LOAD_GAME, _file_to_saveload.name, t, NULL, NULL);
if (ft != FIOS_TYPE_INVALID) SetFiosType(ft);
}

17
src/saveload/oldloader.cpp
View File

@ -25,6 +25,7 @@
#include "../variables.h"
#include "../strings_func.h"
#include "../effectvehicle_base.h"
#include "../string_func.h"
#include "table/strings.h"
@ -1571,19 +1572,23 @@ bool LoadOldSaveGame(const char *file)
return true;
}
void GetOldSaveGameName(char *title, const char *path, const char *file)
void GetOldSaveGameName(const char *path, const char *file, char *title, const char *last)
{
char filename[MAX_PATH];
FILE *f;
char temp[HEADER_SIZE - 1];
snprintf(filename, lengthof(filename), "%s" PATHSEP "%s", path, file);
f = fopen(filename, "rb");
title[0] = '\0';
title[48] = '\0';
FILE *f = fopen(filename, "rb");
temp[0] = '\0';
temp[HEADER_SIZE - 2] = '\0';
if (f == NULL) return;
if (fread(title, 1, 48, f) != 48) snprintf(title, 48, "Corrupt file");
if (fread(temp, 1, HEADER_SIZE - 2, f) != HEADER_SIZE - 2) {
seprintf(title, last, "Corrupt file");
} else {
seprintf(title, last, temp);
}
fclose(f);
}