1 | /* |
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2 | * Copyright (c) 1990, 2007 The Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms are permitted |
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6 | * provided that the above copyright notice and this paragraph are |
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7 | * duplicated in all such forms and that any documentation, |
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8 | * advertising materials, and other materials related to such |
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9 | * distribution and use acknowledge that the software was developed |
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10 | * by the University of California, Berkeley. The name of the |
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11 | * University may not be used to endorse or promote products derived |
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12 | * from this software without specific prior written permission. |
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13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 | * |
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17 | * %W% (UofMD/Berkeley) %G% |
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18 | */ |
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19 | |
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20 | /* |
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21 | * Information local to this implementation of stdio, |
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22 | * in particular, macros and private variables. |
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23 | */ |
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24 | |
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25 | #include <_ansi.h> |
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26 | #include <reent.h> |
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27 | #include <stdarg.h> |
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28 | #include <stdlib.h> |
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29 | #include <unistd.h> |
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30 | #include <stdio.h> |
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31 | #ifdef __SCLE |
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32 | # include <io.h> |
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33 | #endif |
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34 | |
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35 | /* The following define determines if the per-reent stdin, stdout and stderr |
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36 | streams are closed during _reclaim_reent(). The stdin, stdout and stderr |
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37 | streams are initialized to use file descriptors 0, 1 and 2 respectively. In |
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38 | case _STDIO_CLOSE_PER_REENT_STD_STREAMS is defined these file descriptors |
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39 | will be closed via close() provided the owner of the reent structure |
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40 | triggerd the on demand reent initilization, see CHECK_INIT(). */ |
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41 | #if !defined(__tirtos__) |
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42 | #define _STDIO_CLOSE_PER_REENT_STD_STREAMS |
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43 | #endif |
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44 | |
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45 | /* The following macros are supposed to replace calls to _flockfile/_funlockfile |
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46 | and __sfp_lock_acquire/__sfp_lock_release. In case of multi-threaded |
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47 | environments using pthreads, it's not sufficient to lock the stdio functions |
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48 | against concurrent threads accessing the same data, the locking must also be |
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49 | secured against thread cancellation. |
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50 | |
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51 | The below macros have to be used in pairs. The _newlib_XXX_start macro |
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52 | starts with a opening curly brace, the _newlib_XXX_end macro ends with a |
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53 | closing curly brace, so the start macro and the end macro mark the code |
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54 | start and end of a critical section. In case the code leaves the critical |
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55 | section before reaching the end of the critical section's code end, use |
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56 | the appropriate _newlib_XXX_exit macro. */ |
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57 | |
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58 | #if !defined (__SINGLE_THREAD__) && defined (_POSIX_THREADS) \ |
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59 | && !defined (__rtems__) |
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60 | #define _STDIO_WITH_THREAD_CANCELLATION_SUPPORT |
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61 | #endif |
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62 | |
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63 | #if defined(__SINGLE_THREAD__) || defined(__IMPL_UNLOCKED__) |
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64 | |
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65 | # define _newlib_flockfile_start(_fp) |
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66 | # define _newlib_flockfile_exit(_fp) |
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67 | # define _newlib_flockfile_end(_fp) |
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68 | # define _newlib_sfp_lock_start() |
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69 | # define _newlib_sfp_lock_exit() |
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70 | # define _newlib_sfp_lock_end() |
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71 | |
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72 | #elif defined(_STDIO_WITH_THREAD_CANCELLATION_SUPPORT) |
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73 | #include <pthread.h> |
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74 | |
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75 | /* Start a stream oriented critical section: */ |
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76 | # define _newlib_flockfile_start(_fp) \ |
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77 | { \ |
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78 | int __oldfpcancel; \ |
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79 | pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &__oldfpcancel); \ |
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80 | if (!(_fp->_flags2 & __SNLK)) \ |
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81 | _flockfile (_fp) |
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82 | |
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83 | /* Exit from a stream oriented critical section prematurely: */ |
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84 | # define _newlib_flockfile_exit(_fp) \ |
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85 | if (!(_fp->_flags2 & __SNLK)) \ |
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86 | _funlockfile (_fp); \ |
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87 | pthread_setcancelstate (__oldfpcancel, &__oldfpcancel); |
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88 | |
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89 | /* End a stream oriented critical section: */ |
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90 | # define _newlib_flockfile_end(_fp) \ |
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91 | if (!(_fp->_flags2 & __SNLK)) \ |
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92 | _funlockfile (_fp); \ |
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93 | pthread_setcancelstate (__oldfpcancel, &__oldfpcancel); \ |
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94 | } |
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95 | |
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96 | /* Start a stream list oriented critical section: */ |
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97 | # define _newlib_sfp_lock_start() \ |
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98 | { \ |
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99 | int __oldsfpcancel; \ |
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100 | pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &__oldsfpcancel); \ |
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101 | __sfp_lock_acquire () |
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102 | |
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103 | /* Exit from a stream list oriented critical section prematurely: */ |
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104 | # define _newlib_sfp_lock_exit() \ |
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105 | __sfp_lock_release (); \ |
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106 | pthread_setcancelstate (__oldsfpcancel, &__oldsfpcancel); |
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107 | |
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108 | /* End a stream list oriented critical section: */ |
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109 | # define _newlib_sfp_lock_end() \ |
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110 | __sfp_lock_release (); \ |
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111 | pthread_setcancelstate (__oldsfpcancel, &__oldsfpcancel); \ |
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112 | } |
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113 | |
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114 | #else /* !__SINGLE_THREAD__ && !__IMPL_UNLOCKED__ && !_STDIO_WITH_THREAD_CANCELLATION_SUPPORT */ |
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115 | |
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116 | # define _newlib_flockfile_start(_fp) \ |
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117 | { \ |
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118 | if (!(_fp->_flags2 & __SNLK)) \ |
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119 | _flockfile (_fp) |
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120 | |
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121 | # define _newlib_flockfile_exit(_fp) \ |
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122 | if (!(_fp->_flags2 & __SNLK)) \ |
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123 | _funlockfile(_fp); \ |
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124 | |
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125 | # define _newlib_flockfile_end(_fp) \ |
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126 | if (!(_fp->_flags2 & __SNLK)) \ |
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127 | _funlockfile(_fp); \ |
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128 | } |
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129 | |
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130 | # define _newlib_sfp_lock_start() \ |
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131 | { \ |
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132 | __sfp_lock_acquire () |
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133 | |
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134 | # define _newlib_sfp_lock_exit() \ |
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135 | __sfp_lock_release (); |
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136 | |
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137 | # define _newlib_sfp_lock_end() \ |
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138 | __sfp_lock_release (); \ |
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139 | } |
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140 | |
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141 | #endif /* __SINGLE_THREAD__ || __IMPL_UNLOCKED__ */ |
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142 | |
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143 | extern wint_t __fgetwc (struct _reent *, FILE *); |
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144 | extern wint_t __fputwc (struct _reent *, wchar_t, FILE *); |
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145 | extern u_char *__sccl (char *, u_char *fmt); |
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146 | extern int __svfscanf_r (struct _reent *,FILE *, const char *,va_list); |
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147 | extern int __ssvfscanf_r (struct _reent *,FILE *, const char *,va_list); |
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148 | extern int __svfiscanf_r (struct _reent *,FILE *, const char *,va_list); |
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149 | extern int __ssvfiscanf_r (struct _reent *,FILE *, const char *,va_list); |
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150 | extern int __svfwscanf_r (struct _reent *,FILE *, const wchar_t *,va_list); |
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151 | extern int __ssvfwscanf_r (struct _reent *,FILE *, const wchar_t *,va_list); |
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152 | extern int __svfiwscanf_r (struct _reent *,FILE *, const wchar_t *,va_list); |
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153 | extern int __ssvfiwscanf_r (struct _reent *,FILE *, const wchar_t *,va_list); |
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154 | int _svfprintf_r (struct _reent *, FILE *, const char *, |
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155 | va_list) |
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156 | _ATTRIBUTE ((__format__ (__printf__, 3, 0))); |
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157 | int _svfiprintf_r (struct _reent *, FILE *, const char *, |
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158 | va_list) |
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159 | _ATTRIBUTE ((__format__ (__printf__, 3, 0))); |
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160 | int _svfwprintf_r (struct _reent *, FILE *, const wchar_t *, |
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161 | va_list); |
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162 | int _svfiwprintf_r (struct _reent *, FILE *, const wchar_t *, |
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163 | va_list); |
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164 | extern FILE *__sfp (struct _reent *); |
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165 | extern int __sflags (struct _reent *,const char*, int*); |
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166 | extern int __sflush_r (struct _reent *,FILE *); |
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167 | #ifdef _STDIO_BSD_SEMANTICS |
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168 | extern int __sflushw_r (struct _reent *,FILE *); |
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169 | #endif |
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170 | extern int __srefill_r (struct _reent *,FILE *); |
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171 | extern _READ_WRITE_RETURN_TYPE __sread (struct _reent *, void *, char *, |
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172 | _READ_WRITE_BUFSIZE_TYPE); |
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173 | extern _READ_WRITE_RETURN_TYPE __seofread (struct _reent *, void *, |
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174 | char *, |
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175 | _READ_WRITE_BUFSIZE_TYPE); |
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176 | extern _READ_WRITE_RETURN_TYPE __swrite (struct _reent *, void *, |
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177 | const char *, |
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178 | _READ_WRITE_BUFSIZE_TYPE); |
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179 | extern _fpos_t __sseek (struct _reent *, void *, _fpos_t, int); |
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180 | extern int __sclose (struct _reent *, void *); |
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181 | extern int __stextmode (int); |
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182 | extern void __sinit (struct _reent *); |
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183 | extern void _cleanup_r (struct _reent *); |
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184 | extern void __smakebuf_r (struct _reent *, FILE *); |
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185 | extern int __swhatbuf_r (struct _reent *, FILE *, size_t *, int *); |
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186 | extern int _fwalk (struct _reent *, int (*)(FILE *)); |
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187 | extern int _fwalk_reent (struct _reent *, int (*)(struct _reent *, FILE *)); |
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188 | struct _glue * __sfmoreglue (struct _reent *,int n); |
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189 | extern int __submore (struct _reent *, FILE *); |
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190 | |
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191 | #ifdef __LARGE64_FILES |
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192 | extern _fpos64_t __sseek64 (struct _reent *, void *, _fpos64_t, int); |
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193 | extern _READ_WRITE_RETURN_TYPE __swrite64 (struct _reent *, void *, |
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194 | const char *, |
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195 | _READ_WRITE_BUFSIZE_TYPE); |
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196 | #endif |
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197 | |
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198 | /* Called by the main entry point fns to ensure stdio has been initialized. */ |
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199 | |
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200 | #ifdef _REENT_SMALL |
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201 | #define CHECK_INIT(ptr, fp) \ |
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202 | do \ |
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203 | { \ |
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204 | struct _reent *_check_init_ptr = (ptr); \ |
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205 | if ((_check_init_ptr) && !(_check_init_ptr)->__sdidinit) \ |
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206 | __sinit (_check_init_ptr); \ |
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207 | if ((fp) == (FILE *)&__sf_fake_stdin) \ |
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208 | (fp) = _stdin_r(_check_init_ptr); \ |
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209 | else if ((fp) == (FILE *)&__sf_fake_stdout) \ |
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210 | (fp) = _stdout_r(_check_init_ptr); \ |
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211 | else if ((fp) == (FILE *)&__sf_fake_stderr) \ |
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212 | (fp) = _stderr_r(_check_init_ptr); \ |
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213 | } \ |
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214 | while (0) |
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215 | #else /* !_REENT_SMALL */ |
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216 | #define CHECK_INIT(ptr, fp) \ |
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217 | do \ |
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218 | { \ |
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219 | struct _reent *_check_init_ptr = (ptr); \ |
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220 | if ((_check_init_ptr) && !(_check_init_ptr)->__sdidinit) \ |
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221 | __sinit (_check_init_ptr); \ |
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222 | } \ |
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223 | while (0) |
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224 | #endif /* !_REENT_SMALL */ |
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225 | |
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226 | #define CHECK_STD_INIT(ptr) \ |
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227 | do \ |
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228 | { \ |
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229 | struct _reent *_check_init_ptr = (ptr); \ |
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230 | if ((_check_init_ptr) && !(_check_init_ptr)->__sdidinit) \ |
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231 | __sinit (_check_init_ptr); \ |
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232 | } \ |
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233 | while (0) |
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234 | |
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235 | /* Return true and set errno and stream error flag iff the given FILE |
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236 | cannot be written now. */ |
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237 | |
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238 | #define cantwrite(ptr, fp) \ |
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239 | ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \ |
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240 | __swsetup_r(ptr, fp)) |
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241 | |
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242 | /* Test whether the given stdio file has an active ungetc buffer; |
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243 | release such a buffer, without restoring ordinary unread data. */ |
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244 | |
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245 | #define HASUB(fp) ((fp)->_ub._base != NULL) |
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246 | #define FREEUB(ptr, fp) { \ |
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247 | if ((fp)->_ub._base != (fp)->_ubuf) \ |
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248 | _free_r(ptr, (char *)(fp)->_ub._base); \ |
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249 | (fp)->_ub._base = NULL; \ |
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250 | } |
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251 | |
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252 | /* Test for an fgetline() buffer. */ |
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253 | |
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254 | #define HASLB(fp) ((fp)->_lb._base != NULL) |
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255 | #define FREELB(ptr, fp) { _free_r(ptr,(char *)(fp)->_lb._base); \ |
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256 | (fp)->_lb._base = NULL; } |
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257 | |
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258 | #ifdef _WIDE_ORIENT |
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259 | /* |
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260 | * Set the orientation for a stream. If o > 0, the stream has wide- |
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261 | * orientation. If o < 0, the stream has byte-orientation. |
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262 | */ |
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263 | #define ORIENT(fp,ori) \ |
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264 | do \ |
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265 | { \ |
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266 | if (!((fp)->_flags & __SORD)) \ |
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267 | { \ |
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268 | (fp)->_flags |= __SORD; \ |
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269 | if (ori > 0) \ |
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270 | (fp)->_flags2 |= __SWID; \ |
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271 | else \ |
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272 | (fp)->_flags2 &= ~__SWID; \ |
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273 | } \ |
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274 | } \ |
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275 | while (0) |
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276 | #else |
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277 | #define ORIENT(fp,ori) |
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278 | #endif |
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279 | |
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280 | /* WARNING: _dcvt is defined in the stdlib directory, not here! */ |
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281 | |
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282 | char *_dcvt (struct _reent *, char *, double, int, int, char, int); |
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283 | char *_sicvt (char *, short, char); |
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284 | char *_icvt (char *, int, char); |
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285 | char *_licvt (char *, long, char); |
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286 | #ifdef __GNUC__ |
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287 | char *_llicvt (char *, long long, char); |
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288 | #endif |
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289 | |
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290 | #define CVT_BUF_SIZE 128 |
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291 | |
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292 | #define NDYNAMIC 4 /* add four more whenever necessary */ |
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293 | |
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294 | #ifdef __SINGLE_THREAD__ |
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295 | #define __sfp_lock_acquire() |
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296 | #define __sfp_lock_release() |
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297 | #define __sinit_lock_acquire() |
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298 | #define __sinit_lock_release() |
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299 | #else |
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300 | void __sfp_lock_acquire (void); |
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301 | void __sfp_lock_release (void); |
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302 | void __sinit_lock_acquire (void); |
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303 | void __sinit_lock_release (void); |
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304 | #endif |
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305 | |
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306 | /* Types used in positional argument support in vfprinf/vfwprintf. |
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307 | The implementation is char/wchar_t dependent but the class and state |
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308 | tables are only defined once in vfprintf.c. */ |
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309 | typedef enum __packed { |
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310 | ZERO, /* '0' */ |
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311 | DIGIT, /* '1-9' */ |
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312 | DOLLAR, /* '$' */ |
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313 | MODFR, /* spec modifier */ |
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314 | SPEC, /* format specifier */ |
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315 | DOT, /* '.' */ |
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316 | STAR, /* '*' */ |
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317 | FLAG, /* format flag */ |
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318 | OTHER, /* all other chars */ |
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319 | MAX_CH_CLASS /* place-holder */ |
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320 | } __CH_CLASS; |
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321 | |
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322 | typedef enum __packed { |
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323 | START, /* start */ |
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324 | SFLAG, /* seen a flag */ |
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325 | WDIG, /* seen digits in width area */ |
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326 | WIDTH, /* processed width */ |
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327 | SMOD, /* seen spec modifier */ |
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328 | SDOT, /* seen dot */ |
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329 | VARW, /* have variable width specifier */ |
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330 | VARP, /* have variable precision specifier */ |
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331 | PREC, /* processed precision */ |
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332 | VWDIG, /* have digits in variable width specification */ |
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333 | VPDIG, /* have digits in variable precision specification */ |
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334 | DONE, /* done */ |
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335 | MAX_STATE, /* place-holder */ |
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336 | } __STATE; |
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337 | |
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338 | typedef enum __packed { |
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339 | NOOP, /* do nothing */ |
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340 | NUMBER, /* build a number from digits */ |
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341 | SKIPNUM, /* skip over digits */ |
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342 | GETMOD, /* get and process format modifier */ |
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343 | GETARG, /* get and process argument */ |
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344 | GETPW, /* get variable precision or width */ |
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345 | GETPWB, /* get variable precision or width and pushback fmt char */ |
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346 | GETPOS, /* get positional parameter value */ |
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347 | PWPOS, /* get positional parameter value for variable width or precision */ |
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348 | } __ACTION; |
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349 | |
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350 | extern const __CH_CLASS __chclass[256]; |
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351 | extern const __STATE __state_table[MAX_STATE][MAX_CH_CLASS]; |
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352 | extern const __ACTION __action_table[MAX_STATE][MAX_CH_CLASS]; |
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