omoikane
aff78be8f9
The first alt version added some whitespaces that broke the outline, so I simply filled those up. I also expanded tabs to spaces since there is no size limit restriction for the alternate version. The second alt version attempted to force binary mode with _setmode() and _fileno() calls, plus some additional headers. Rather than doing it this way, I hack in the binary mode adjustments via preprocessor. Actually I did a similar trick for IOCCC 2011, but I guess I didn't submit that version: https://uguu.org/archive/ioccc2011/akari/source/binmode_main.h The file above uses _setmode() and _fileno(). The leading underscore indicates that they were nonstandard extensions. For the binmode_main.h in this change, I have opted for setmode() and STDIN_FILENO instead, which are more widely available.
40 lines
2.0 KiB
C
40 lines
2.0 KiB
C
/* Preprocessor hack to set binary mode for stdin and stdout.
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This replaces main() with an alternative function forces binary
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modes. This is intended to included via compiler arguments, so we
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would be able to enable binary modes without modifying the original
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program source. Conceptually, it's similar to LD_PRELOAD, except
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we hack it in via preprocessor.
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It only works for programs where main() occurs just once.
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*/
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#if defined(_WIN32)
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#include<stdio.h>
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#include<fcntl.h>
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#include<io.h>
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#include<unistd.h>
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#define main \
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/* Forward declaration for the updated main(), now renamed */ \
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/* binmode_main(). Return type is omitted since this macro */ \
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/* is expanded just after the return type. */ \
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binmode_main(int argc, char **argv); \
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\
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/* Updated main(). */ \
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int main(int argc, char **argv) \
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{ \
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/* Set binary modes. */ \
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setmode(STDIN_FILENO, O_BINARY); \
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setmode(STDOUT_FILENO, O_BINARY); \
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\
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/* Call the original main(). */ \
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return binmode_main(argc, argv); \
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} \
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\
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/* Definition for the original main. Function arguments are */ \
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/* omitted since this macro is expanded just before the arguments. */ \
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int binmode_main
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#endif
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