1 | #ifndef _LIMITS_H |
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2 | #define _LIMITS_H |
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3 | |
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4 | #include <endian.h> |
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5 | |
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6 | #ifndef __SCHAR_MAX__ |
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7 | #define __SCHAR_MAX__ 127 |
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8 | #endif |
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9 | #ifndef __SHRT_MAX__ |
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10 | #define __SHRT_MAX__ 32767 |
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11 | #endif |
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12 | #ifndef __INT_MAX__ |
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13 | #define __INT_MAX__ 2147483647 |
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14 | #endif |
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15 | #ifndef __LONG_MAX__ |
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16 | #if __WORDSIZE == 64 |
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17 | #define __LONG_MAX__ 9223372036854775807L |
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18 | #else |
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19 | #define __LONG_MAX__ 2147483647L |
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20 | #endif |
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21 | #endif |
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22 | |
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23 | #define CHAR_BIT 8 |
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24 | |
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25 | #define SCHAR_MIN (-1 - SCHAR_MAX) |
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26 | #define SCHAR_MAX (__SCHAR_MAX__) |
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27 | #define UCHAR_MAX (SCHAR_MAX * 2 + 1) |
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28 | |
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29 | #ifdef __CHAR_UNSIGNED__ |
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30 | #undef CHAR_MIN |
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31 | #define CHAR_MIN 0 |
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32 | #undef CHAR_MAX |
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33 | #define CHAR_MAX UCHAR_MAX |
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34 | #else |
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35 | #undef CHAR_MIN |
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36 | #define CHAR_MIN SCHAR_MIN |
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37 | #undef CHAR_MAX |
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38 | #define CHAR_MAX SCHAR_MAX |
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39 | #endif |
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40 | |
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41 | #define SHRT_MIN (-1 - SHRT_MAX) |
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42 | #define SHRT_MAX (__SHRT_MAX__) |
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43 | #if ((__INT_MAX__) == (__SHRT_MAX__)) |
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44 | #define USHRT_MAX (SHRT_MAX * 2U + 1U) |
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45 | #else |
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46 | #define USHRT_MAX (SHRT_MAX * 2 + 1) |
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47 | #endif |
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48 | |
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49 | #define INT_MIN (-1 - INT_MAX) |
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50 | #define INT_MAX (__INT_MAX__) |
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51 | #define UINT_MAX (INT_MAX * 2U + 1U) |
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52 | |
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53 | #define LONG_MIN (-1L - LONG_MAX) |
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54 | #define LONG_MAX ((__LONG_MAX__) + 0L) |
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55 | #define ULONG_MAX (LONG_MAX * 2UL + 1UL) |
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56 | |
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57 | #define LLONG_MAX 9223372036854775807LL |
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58 | #define LLONG_MIN (-LLONG_MAX - 1LL) |
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59 | |
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60 | /* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */ |
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61 | #define ULLONG_MAX 18446744073709551615ULL |
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62 | |
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63 | #define SSIZE_MIN LONG_MIN |
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64 | #define SSIZE_MAX LONG_MAX |
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65 | |
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66 | #define PASS_MAX 256 |
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67 | |
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68 | #define NR_OPEN 1024 |
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69 | |
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70 | #define NGROUPS_MAX 32 /* supplemental group IDs are available */ |
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71 | #define ARG_MAX 131072 /* # bytes of args + environ for exec() */ |
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72 | #define CHILD_MAX 999 /* no limit :-) */ |
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73 | /*#define OPEN_MAX 256 # open files a process may have */ |
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74 | #define OPEN_MAX 60 /* SEE VFS PARAMS */ |
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75 | #define LINK_MAX 127 /* # links a file may have */ |
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76 | #define MAX_CANON 255 /* size of the canonical input queue */ |
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77 | #define MAX_INPUT 255 /* size of the type-ahead buffer */ |
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78 | #define NAME_MAX 255 /* chars in a file name */ |
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79 | #define PATH_MAX NAME_MAX*12+1 /* SEE VFS PARAMS */ |
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80 | #define PIPE_BUF 4096 # bytes in atomic write to a pipe */ |
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81 | //#define PIPE_BUF 512 /* SEE BUFFER CACHE BLOCK SIZE */ |
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82 | |
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83 | #define RTSIG_MAX 32 |
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84 | |
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85 | #define LINE_MAX 2048 |
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86 | #define ATEXIT_MAX 32 |
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87 | |
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88 | /* mutt demanded these */ |
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89 | #define _POSIX_PATH_MAX PATH_MAX |
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90 | #define MB_LEN_MAX 16 |
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91 | |
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92 | #ifdef _XOPEN_SOURCE |
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93 | #define IOV_MAX 1024 |
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94 | #endif |
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95 | |
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96 | #endif |
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