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Last-ditch maximum size limit for Signpost

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This makes sure that width * height <= INT_MAX, which it rather needs
to be.
This commit is contained in:
Ben Harris
2023-01-10 20:41:24 +00:00
parent d5ec2758ee
commit 5c36e1536a
1 changed files with 3 additions and 0 deletions
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3
signpost.c
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@ -7,6 +7,7 @@
#include <string.h> #include <string.h>
#include <assert.h> #include <assert.h>
#include <ctype.h> #include <ctype.h>
#include <limits.h>
#include <math.h> #include <math.h>
#include "puzzles.h" #include "puzzles.h"
@ -421,6 +422,8 @@ static const char *validate_params(const game_params *params, bool full)
{ {
if (params->w < 1) return "Width must be at least one"; if (params->w < 1) return "Width must be at least one";
if (params->h < 1) return "Height must be at least one"; if (params->h < 1) return "Height must be at least one";
if (params->w > INT_MAX / params->h)
return "Width times height must not be unreasonably large";
if (full && params->w == 1 && params->h == 1) if (full && params->w == 1 && params->h == 1)
/* The UI doesn't let us move these from unsolved to solved, /* The UI doesn't let us move these from unsolved to solved,
* so we disallow generating (but not playing) them. */ * so we disallow generating (but not playing) them. */