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562
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1 /*
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2 compat: Some compatibility functions and header inclusions.
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3 Basic standard C stuff, that may barely be above/around C89.
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4
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5 The mpg123 code is determined to keep it's legacy. A legacy of old, old UNIX.
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6 It is envisioned to include this compat header instead of any of the "standard" headers, to catch compatibility issues.
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7 So, don't include stdlib.h or string.h ... include compat.h.
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8
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9 copyright 2007-8 by the mpg123 project - free software under the terms of the LGPL 2.1
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10 see COPYING and AUTHORS files in distribution or http://mpg123.org
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11 initially written by Thomas Orgis
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12 */
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13
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14 #ifndef MPG123_COMPAT_H
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15 #define MPG123_COMPAT_H
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16
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17 #include "config.h"
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18
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19 #ifdef HAVE_STDLIB_H
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20 /* realloc, size_t */
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21 #include <stdlib.h>
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22 #endif
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23
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24 #include <stdio.h>
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25 #include <math.h>
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26
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27 #ifdef HAVE_SIGNAL_H
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28 #include <signal.h>
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29 #else
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30 #ifdef HAVE_SYS_SIGNAL_H
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31 #include <sys/signal.h>
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32 #endif
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33 #endif
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34
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35 #ifdef HAVE_UNISTD_H
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36 #include <unistd.h>
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37 #endif
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38
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39 /* Types, types, types. */
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40 /* Do we actually need these two in addition to sys/types.h? As replacement? */
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41 #ifdef HAVE_SYS_TYPES_H
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42 #include <sys/types.h>
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43 #endif
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44 #ifdef HAVE_INTTYPES_H
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45 #include <inttypes.h>
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46 #endif
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47 #ifdef HAVE_STDINT_H
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48 #include <stdint.h>
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49 #endif
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50 /* We want SIZE_MAX, etc. */
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51 #ifdef HAVE_LIMITS_H
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52 #include <limits.h>
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53 #endif
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54
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55 #ifndef SIZE_MAX
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56 #define SIZE_MAX ((size_t)-1)
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57 #endif
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58 #ifndef ULONG_MAX
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59 #define ULONG_MAX ((unsigned long)-1)
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60 #endif
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61
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62 #ifdef HAVE_STRING_H
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63 #include <string.h>
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64 #endif
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65
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66 #ifdef OS2
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67 #include <float.h>
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68 #endif
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69
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70 #ifdef HAVE_SYS_TIME_H
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71 #include <sys/time.h>
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72 #endif
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73 /* For select(), I need select.h according to POSIX 2001, else: sys/time.h sys/types.h unistd.h */
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74 #ifdef HAVE_SYS_SELECT_H
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75 #include <sys/select.h>
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76 #endif
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77
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78 /* To parse big numbers... */
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79 #ifdef HAVE_ATOLL
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80 #define atobigint atoll
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81 #else
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82 #define atobigint atol
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83 #endif
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84
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85 typedef unsigned char byte;
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86
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87 /* A safe realloc also for very old systems where realloc(NULL, size) returns NULL. */
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88 void *safe_realloc(void *ptr, size_t size);
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89 #ifndef HAVE_STRERROR
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90 const char *strerror(int errnum);
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91 #endif
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92
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93 #ifndef HAVE_STRDUP
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94 char *strdup(const char *s);
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95 #endif
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96
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97 /* If we have the size checks enabled, try to derive some sane printfs.
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98 Simple start: Use max integer type and format if long is not big enough.
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99 I am hesitating to use %ll without making sure that it's there... */
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100 #if (defined SIZEOF_OFF_T) && (SIZEOF_OFF_T > SIZEOF_LONG) && (defined PRIiMAX)
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101 # define OFF_P PRIiMAX
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102 typedef intmax_t off_p;
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103 #else
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104 # define OFF_P "li"
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105 typedef long off_p;
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106 #endif
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107
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108 #if (defined SIZEOF_SIZE_T) && (SIZEOF_SIZE_T > SIZEOF_LONG) && (defined PRIuMAX)
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109 # define SIZE_P PRIuMAX
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110 typedef uintmax_t size_p;
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111 #else
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112 # define SIZE_P "lu"
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113 typedef unsigned long size_p;
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114 #endif
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115
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116 #if (defined SIZEOF_SSIZE_T) && (SIZEOF_SSIZE_T > SIZEOF_LONG) && (defined PRIiMAX)
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117 # define SSIZE_P PRIuMAX
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118 typedef intmax_t ssize_p;
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119 #else
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120 # define SSIZE_P "li"
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121 typedef long ssize_p;
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122 #endif
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123
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124 #endif
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