f62c9c7a2c
See https://sourceforge.net/p/tuxpaint/mailman/message/36077409/ from Oct. 2017 for more.
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/* #define DEBUG */
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/* #define VERBOSE */
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/*
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* Enable verbose logging if requested on platforms that support it.
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*
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* Verbose logging adds metadata to printf, including the source file location
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* from where printf was called and the time it was called at runtime.
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*/
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#if defined(DEBUG) && defined(VERBOSE) && defined(__GNUC__)
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#include <stdio.h>
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#include <time.h>
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#define printf(args...) do { \
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time_t now = time(NULL); \
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printf("\n### %s, line %d in %s() @ %s", __FILE__, __LINE__, __FUNCTION__, ctime(&now)); \
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printf(args); \
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} while(0)
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#endif
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/*
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* Define a convenience macro DEBUG_PRINTF(). This macro resolves to printf()
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* if and only if DEBUG is enabled, otherwise resolves to nothing. In other
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* words,
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*
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* DEBUG_PRINTF("Hello, world!\n");
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*
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* ... is equivalent to:
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*
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* #if defined(DEBUG)
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* printf("Hello, world!\n");
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* #endif
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*
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* (To be precise, the semicolon falls outside of the #if test, but an empty
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* semicolon resolves to nothing in standard C.)
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*
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* If VERBOSE logging is enabled, DEBUG_PRINTF should resolve to the verbose
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* version of printf() defined earlier in this file.
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*/
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#if defined(DEBUG)
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#define DEBUG_PRINTF(...) printf(__VA_ARGS__)
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#else
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#define DEBUG_PRINTF(...)
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#endif
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