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If the game is solved (either by a win or a loss), interpret_move() can never return a move, but execute_move() should also reject any moves in case we're loading a corrupt or malicious save file. Otherwise a save file with more guesses than the maximum allowed can cause a buffer overrun. This save file demonstrates the problem when loaded into a build of Puzzles with AddressSanitizer: SAVEFILE:41:Simon Tatham's Portable Puzzle Collection VERSION :1:1 GAME :5:Guess PARAMS :9:c6p4g1Bm CPARAMS :9:c6p4g1Bm DESC :8:b5f3faed NSTATES :1:3 STATEPOS:1:3 MOVE :8:G1,1,2,2 MOVE :8:G4,3,1,1
This is the README accompanying the source code to Simon Tatham's puzzle collection. The collection's web site is at <https://www.chiark.greenend.org.uk/~sgtatham/puzzles/>. The puzzle collection is built using CMake <https://cmake.org/>. To compile in the simplest way (on any of Linux, Windows or Mac), run these commands in the source directory: cmake . cmake --build . The manual is provided in Windows Help format for the Windows build; in text format for anyone who needs it; and in HTML for the Mac OS X application and for the web site. It is generated from a Halibut source file (puzzles.but), which is the preferred form for modification. To generate the manual in other formats, rebuild it, or learn about Halibut, visit the Halibut website at <https://www.chiark.greenend.org.uk/~sgtatham/halibut/>.