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-rw-r--r--src/fileio.cpp5
-rw-r--r--src/newgrf_config.cpp4
-rw-r--r--src/smallmap_gui.cpp4
3 files changed, 8 insertions, 5 deletions
diff --git a/src/fileio.cpp b/src/fileio.cpp
index e17eaf654..851090c07 100644
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -254,7 +254,8 @@ void FioOpenFile(int slot, const char *filename, Subdirectory subdir)
#endif /* LIMITED_FDS */
f = FioFOpenFile(filename, "rb", subdir);
if (f == NULL) usererror("Cannot open file '%s'", filename);
- uint32 pos = ftell(f);
+ long pos = ftell(f);
+ if (pos < 0) usererror("Cannot read file '%s'", filename);
FioCloseFile(slot); // if file was opened before, close it
_fio.handles[slot] = f;
@@ -271,7 +272,7 @@ void FioOpenFile(int slot, const char *filename, Subdirectory subdir)
_fio.usage_count[slot] = 0;
_fio.open_handles++;
#endif /* LIMITED_FDS */
- FioSeekToFile(slot, pos);
+ FioSeekToFile(slot, (uint32)pos);
}
static const char * const _subdirs[] = {
diff --git a/src/newgrf_config.cpp b/src/newgrf_config.cpp
index bbd670a71..df8685030 100644
--- a/src/newgrf_config.cpp
+++ b/src/newgrf_config.cpp
@@ -360,10 +360,10 @@ static bool CalcGRFMD5Sum(GRFConfig *config, Subdirectory subdir)
f = FioFOpenFile(config->filename, "rb", subdir, &size);
if (f == NULL) return false;
- size_t start = ftell(f);
+ long start = ftell(f);
size = min(size, GRFGetSizeOfDataSection(f));
- if (fseek(f, start, SEEK_SET) < 0) {
+ if (start < 0 || fseek(f, start, SEEK_SET) < 0) {
FioFCloseFile(f);
return false;
}
diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
index 8e53ade6f..85a123626 100644
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -1418,10 +1418,12 @@ int SmallMapWindow::GetPositionOnLegend(Point pt)
case WID_SM_LEGEND: // Legend
if (this->map_type == SMT_INDUSTRY || this->map_type == SMT_LINKSTATS || this->map_type == SMT_OWNER) {
int click_pos = this->GetPositionOnLegend(pt);
+ if (click_pos < 0) break;
+
/* If industry type small map*/
if (this->map_type == SMT_INDUSTRY) {
/* If click on industries label, find right industry type and enable/disable it. */
- if (click_pos >= 0 && click_pos < _smallmap_industry_count) {
+ if (click_pos < _smallmap_industry_count) {
this->SelectLegendItem(click_pos, _legend_from_industries, _smallmap_industry_count);
}
} else if (this->map_type == SMT_LINKSTATS) {