|
Last change
on this file was
10933,
checked in by westram, 10 years ago
|
- define ARB_PATH_MAX
- uses PATH_MAX if provided/found
- limits to reasonable range (256-10000)
- use FILENAME_MAX to double check
|
|
File size:
1.7 KB
|
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| 1 | // =============================================================== // |
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| 2 | // // |
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| 3 | // File : arb_pathlen.h // |
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| 4 | // Purpose : stop PATH_MAX and accomplices driving me crazy // |
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| 5 | // // |
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| 6 | // Coded by Ralf Westram (coder@reallysoft.de) in October 2013 // |
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| 7 | // Institute of Microbiology (Technical University Munich) // |
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| 8 | // http://www.arb-home.de/ // |
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| 9 | // // |
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| 10 | // =============================================================== // |
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| 11 | |
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| 12 | #ifndef ARB_PATHLEN_H |
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| 13 | #define ARB_PATHLEN_H |
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| 14 | |
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| 15 | #ifndef STATIC_ASSERT_H |
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| 16 | #include <static_assert.h> |
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| 17 | #endif |
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| 18 | #ifndef _GLIBCXX_CLIMITS |
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| 19 | #include <climits> |
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| 20 | #endif |
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| 21 | #ifndef _GLIBCXX_CSTDIO |
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| 22 | #include <cstdio> |
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| 23 | #endif |
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| 24 | |
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| 25 | #define ARB_PATH_LOWER_LIMIT 256 |
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| 26 | #define ARB_PATH_UPPER_LIMIT 10000 // ought to be enough for anybody ;-) |
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| 27 | |
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| 28 | #ifdef PATH_MAX |
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| 29 | #define ARB_PATH_MAX PATH_MAX |
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| 30 | #else |
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| 31 | #define ARB_PATH_MAX 4096 // use a reasonable amout if PATH_MAX is undefined (i.e. if there is NO limit) |
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| 32 | #endif |
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| 33 | |
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| 34 | #ifndef ARB_PATH_MAX |
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| 35 | #error Failed to detect useable allowed size for filenames (ARB_PATH_MAX) |
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| 36 | #endif |
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| 37 | #ifndef FILENAME_MAX |
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| 38 | #error FILENAME_MAX is undefined |
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| 39 | #endif |
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| 40 | |
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| 41 | STATIC_ASSERT(FILENAME_MAX>=ARB_PATH_MAX); // if this fails, either PATH_MAX lies or the reasonable amount set above is too high |
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| 42 | STATIC_ASSERT(ARB_PATH_MAX>=ARB_PATH_LOWER_LIMIT); |
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| 43 | STATIC_ASSERT(ARB_PATH_UPPER_LIMIT>=ARB_PATH_LOWER_LIMIT); |
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| 44 | |
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| 45 | #if (ARB_PATH_MAX > ARB_PATH_UPPER_LIMIT) |
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| 46 | #undef ARB_PATH_MAX |
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| 47 | #define ARB_PATH_MAX ARB_PATH_UPPER_LIMIT |
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| 48 | #endif |
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| 49 | |
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| 50 | #else |
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| 51 | #error arb_pathlen.h included twice |
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| 52 | #endif // ARB_PATHLEN_H |
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