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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * Copyright (c) 1990 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 | |||
18 | /* |
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19 | FUNCTION |
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6099 | serge | 20 | < |
4349 | Serge | 21 | |
22 | INDEX |
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23 | fwrite |
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24 | INDEX |
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6099 | serge | 25 | fwrite_unlocked |
26 | INDEX |
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4349 | Serge | 27 | _fwrite_r |
6099 | serge | 28 | INDEX |
29 | _fwrite_unlocked_r |
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4349 | Serge | 30 | |
31 | ANSI_SYNOPSIS |
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32 | #include |
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4921 | Serge | 33 | size_t fwrite(const void *restrict <[buf]>, size_t <[size]>, |
34 | size_t <[count]>, FILE *restrict <[fp]>); |
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4349 | Serge | 35 | |
6099 | serge | 36 | #define _BSD_SOURCE |
4349 | Serge | 37 | #include |
6099 | serge | 38 | size_t fwrite_unlocked(const void *restrict <[buf]>, size_t <[size]>, |
39 | size_t <[count]>, FILE *restrict <[fp]>); |
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40 | |||
41 | #include |
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4921 | Serge | 42 | size_t _fwrite_r(struct _reent *<[ptr]>, const void *restrict <[buf]>, size_t <[size]>, |
43 | size_t <[count]>, FILE *restrict <[fp]>); |
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4349 | Serge | 44 | |
6099 | serge | 45 | #include |
46 | size_t _fwrite_unlocked_r(struct _reent *<[ptr]>, const void *restrict <[buf]>, size_t <[size]>, |
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47 | size_t <[count]>, FILE *restrict <[fp]>); |
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48 | |||
4349 | Serge | 49 | TRAD_SYNOPSIS |
50 | #include |
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51 | size_t fwrite(<[buf]>, <[size]>, <[count]>, <[fp]>) |
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52 | char *<[buf]>; |
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53 | size_t <[size]>; |
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54 | size_t <[count]>; |
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55 | FILE *<[fp]>; |
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56 | |||
6099 | serge | 57 | #define _BSD_SOURCE |
4349 | Serge | 58 | #include |
6099 | serge | 59 | size_t fwrite_unlocked(<[buf]>, <[size]>, <[count]>, <[fp]>) |
60 | char *<[buf]>; |
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61 | size_t <[size]>; |
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62 | size_t <[count]>; |
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63 | FILE *<[fp]>; |
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64 | |||
65 | #include |
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4349 | Serge | 66 | size_t _fwrite_r(<[ptr]>, <[buf]>, <[size]>, <[count]>, <[fp]>) |
67 | struct _reent *<[ptr]>; |
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68 | char *<[buf]>; |
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69 | size_t <[size]>; |
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70 | size_t <[count]>; |
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71 | FILE *<[fp]>; |
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72 | |||
6099 | serge | 73 | #include |
74 | size_t _fwrite_unlocked_r(<[ptr]>, <[buf]>, <[size]>, <[count]>, <[fp]>) |
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75 | struct _reent *<[ptr]>; |
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76 | char *<[buf]>; |
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77 | size_t <[size]>; |
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78 | size_t <[count]>; |
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79 | FILE *<[fp]>; |
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80 | |||
4349 | Serge | 81 | DESCRIPTION |
82 | < |
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83 | <[buf]>, <[count]> elements (each of size <[size]>) into the file or |
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84 | stream identified by <[fp]>. < |
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85 | <[count]> if an error intervenes. |
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86 | |||
87 | < |
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88 | <[fp]> by the number of @emph{characters} actually written. |
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89 | |||
6099 | serge | 90 | < |
91 | < |
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92 | protected by flockfile() (or ftrylockfile()) and funlockfile(). This |
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93 | function may safely be used in a multi-threaded program if and only |
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94 | if they are called while the invoking thread owns the (FILE *) |
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95 | object, as is the case after a successful call to the flockfile() or |
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96 | ftrylockfile() functions. If threads are disabled, then |
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97 | < |
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4349 | Serge | 98 | |
6099 | serge | 99 | <<_fwrite_r>> and <<_fwrite_unlocked_r>> are simply reentrant versions of the |
100 | above that take an additional reentrant structure argument: <[ptr]>. |
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101 | |||
4349 | Serge | 102 | RETURNS |
103 | If < |
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104 | result is the same as the argument <[count]>. In any event, the |
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105 | result is the number of complete elements that < |
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106 | the file. |
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107 | |||
108 | PORTABILITY |
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109 | ANSI C requires < |
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110 | |||
6099 | serge | 111 | < |
112 | |||
4349 | Serge | 113 | Supporting OS subroutines required: < |
114 | < |
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115 | */ |
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116 | |||
117 | #if defined(LIBC_SCCS) && !defined(lint) |
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118 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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119 | #endif /* LIBC_SCCS and not lint */ |
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120 | |||
121 | #include <_ansi.h> |
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122 | #include |
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123 | #include |
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124 | #if 0 |
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125 | #include |
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126 | #endif |
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127 | #include "local.h" |
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128 | #if 1 |
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129 | #include "fvwrite.h" |
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130 | #endif |
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131 | |||
6099 | serge | 132 | #ifdef __IMPL_UNLOCKED__ |
133 | #define _fwrite_r _fwrite_unlocked_r |
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134 | #define fwrite fwrite_unlocked |
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135 | #endif |
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136 | |||
4349 | Serge | 137 | /* |
138 | * Write `count' objects (each size `size') from memory to the given file. |
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139 | * Return the number of whole objects written. |
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140 | */ |
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141 | |||
142 | size_t |
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143 | _DEFUN(_fwrite_r, (ptr, buf, size, count, fp), |
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144 | struct _reent * ptr _AND |
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4921 | Serge | 145 | _CONST _PTR __restrict buf _AND |
4349 | Serge | 146 | size_t size _AND |
147 | size_t count _AND |
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4921 | Serge | 148 | FILE * __restrict fp) |
4349 | Serge | 149 | { |
150 | size_t n; |
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4921 | Serge | 151 | #ifdef _FVWRITE_IN_STREAMIO |
4349 | Serge | 152 | struct __suio uio; |
153 | struct __siov iov; |
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154 | |||
155 | iov.iov_base = buf; |
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156 | uio.uio_resid = iov.iov_len = n = count * size; |
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157 | uio.uio_iov = &iov; |
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158 | uio.uio_iovcnt = 1; |
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159 | |||
160 | /* |
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161 | * The usual case is success (__sfvwrite_r returns 0); |
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162 | * skip the divide if this happens, since divides are |
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163 | * generally slow and since this occurs whenever size==0. |
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164 | */ |
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165 | |||
166 | CHECK_INIT(ptr, fp); |
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167 | |||
4921 | Serge | 168 | _newlib_flockfile_start (fp); |
4349 | Serge | 169 | ORIENT (fp, -1); |
170 | if (__sfvwrite_r (ptr, fp, &uio) == 0) |
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171 | { |
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4921 | Serge | 172 | _newlib_flockfile_exit (fp); |
4349 | Serge | 173 | return count; |
174 | } |
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4921 | Serge | 175 | _newlib_flockfile_end (fp); |
4349 | Serge | 176 | return (n - uio.uio_resid) / size; |
4921 | Serge | 177 | #else |
178 | size_t i = 0; |
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179 | _CONST char *p = buf; |
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180 | n = count * size; |
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181 | CHECK_INIT (ptr, fp); |
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182 | |||
183 | _newlib_flockfile_start (fp); |
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184 | ORIENT (fp, -1); |
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185 | /* Make sure we can write. */ |
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186 | if (cantwrite (ptr, fp)) |
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187 | goto ret; |
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188 | |||
189 | while (i < n) |
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190 | { |
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191 | if (__sputc_r (ptr, p[i], fp) == EOF) |
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192 | break; |
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193 | |||
194 | i++; |
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195 | } |
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196 | |||
197 | ret: |
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198 | _newlib_flockfile_end (fp); |
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199 | return i / size; |
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200 | #endif |
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4349 | Serge | 201 | } |
202 | |||
203 | #ifndef _REENT_ONLY |
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204 | size_t |
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205 | _DEFUN(fwrite, (buf, size, count, fp), |
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4921 | Serge | 206 | _CONST _PTR __restrict buf _AND |
4349 | Serge | 207 | size_t size _AND |
208 | size_t count _AND |
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209 | FILE * fp) |
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210 | { |
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211 | return _fwrite_r (_REENT, buf, size, count, fp); |
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212 | } |
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213 | #endif> |