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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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20 | < |
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21 | |||
22 | INDEX |
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23 | fwrite |
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24 | INDEX |
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25 | _fwrite_r |
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26 | |||
27 | ANSI_SYNOPSIS |
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28 | #include |
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4921 | Serge | 29 | size_t fwrite(const void *restrict <[buf]>, size_t <[size]>, |
30 | size_t <[count]>, FILE *restrict <[fp]>); |
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4349 | Serge | 31 | |
32 | #include |
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4921 | Serge | 33 | size_t _fwrite_r(struct _reent *<[ptr]>, const void *restrict <[buf]>, size_t <[size]>, |
34 | size_t <[count]>, FILE *restrict <[fp]>); |
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4349 | Serge | 35 | |
36 | TRAD_SYNOPSIS |
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37 | #include |
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38 | size_t fwrite(<[buf]>, <[size]>, <[count]>, <[fp]>) |
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39 | char *<[buf]>; |
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40 | size_t <[size]>; |
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41 | size_t <[count]>; |
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42 | FILE *<[fp]>; |
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43 | |||
44 | #include |
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45 | size_t _fwrite_r(<[ptr]>, <[buf]>, <[size]>, <[count]>, <[fp]>) |
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46 | struct _reent *<[ptr]>; |
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47 | char *<[buf]>; |
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48 | size_t <[size]>; |
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49 | size_t <[count]>; |
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50 | FILE *<[fp]>; |
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51 | |||
52 | DESCRIPTION |
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53 | < |
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54 | <[buf]>, <[count]> elements (each of size <[size]>) into the file or |
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55 | stream identified by <[fp]>. < |
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56 | <[count]> if an error intervenes. |
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57 | |||
58 | < |
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59 | <[fp]> by the number of @emph{characters} actually written. |
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60 | |||
61 | <<_fwrite_r>> is simply the reentrant version of < |
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62 | takes an additional reentrant structure argument: <[ptr]>. |
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63 | |||
64 | RETURNS |
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65 | If < |
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66 | result is the same as the argument <[count]>. In any event, the |
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67 | result is the number of complete elements that < |
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68 | the file. |
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69 | |||
70 | PORTABILITY |
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71 | ANSI C requires < |
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72 | |||
73 | Supporting OS subroutines required: < |
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74 | < |
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75 | */ |
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76 | |||
77 | #if defined(LIBC_SCCS) && !defined(lint) |
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78 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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79 | #endif /* LIBC_SCCS and not lint */ |
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80 | |||
81 | #include <_ansi.h> |
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82 | #include |
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83 | #include |
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84 | #if 0 |
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85 | #include |
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86 | #endif |
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87 | #include "local.h" |
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88 | #if 1 |
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89 | #include "fvwrite.h" |
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90 | #endif |
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91 | |||
92 | /* |
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93 | * Write `count' objects (each size `size') from memory to the given file. |
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94 | * Return the number of whole objects written. |
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95 | */ |
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96 | |||
97 | size_t |
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98 | _DEFUN(_fwrite_r, (ptr, buf, size, count, fp), |
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99 | struct _reent * ptr _AND |
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4921 | Serge | 100 | _CONST _PTR __restrict buf _AND |
4349 | Serge | 101 | size_t size _AND |
102 | size_t count _AND |
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4921 | Serge | 103 | FILE * __restrict fp) |
4349 | Serge | 104 | { |
105 | size_t n; |
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4921 | Serge | 106 | #ifdef _FVWRITE_IN_STREAMIO |
4349 | Serge | 107 | struct __suio uio; |
108 | struct __siov iov; |
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109 | |||
110 | iov.iov_base = buf; |
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111 | uio.uio_resid = iov.iov_len = n = count * size; |
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112 | uio.uio_iov = &iov; |
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113 | uio.uio_iovcnt = 1; |
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114 | |||
115 | /* |
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116 | * The usual case is success (__sfvwrite_r returns 0); |
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117 | * skip the divide if this happens, since divides are |
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118 | * generally slow and since this occurs whenever size==0. |
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119 | */ |
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120 | |||
121 | CHECK_INIT(ptr, fp); |
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122 | |||
4921 | Serge | 123 | _newlib_flockfile_start (fp); |
4349 | Serge | 124 | ORIENT (fp, -1); |
125 | if (__sfvwrite_r (ptr, fp, &uio) == 0) |
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126 | { |
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4921 | Serge | 127 | _newlib_flockfile_exit (fp); |
4349 | Serge | 128 | return count; |
129 | } |
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4921 | Serge | 130 | _newlib_flockfile_end (fp); |
4349 | Serge | 131 | return (n - uio.uio_resid) / size; |
4921 | Serge | 132 | #else |
133 | size_t i = 0; |
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134 | _CONST char *p = buf; |
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135 | n = count * size; |
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136 | CHECK_INIT (ptr, fp); |
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137 | |||
138 | _newlib_flockfile_start (fp); |
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139 | ORIENT (fp, -1); |
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140 | /* Make sure we can write. */ |
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141 | if (cantwrite (ptr, fp)) |
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142 | goto ret; |
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143 | |||
144 | while (i < n) |
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145 | { |
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146 | if (__sputc_r (ptr, p[i], fp) == EOF) |
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147 | break; |
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148 | |||
149 | i++; |
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150 | } |
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151 | |||
152 | ret: |
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153 | _newlib_flockfile_end (fp); |
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154 | return i / size; |
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155 | #endif |
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4349 | Serge | 156 | } |
157 | |||
158 | #ifndef _REENT_ONLY |
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159 | size_t |
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160 | _DEFUN(fwrite, (buf, size, count, fp), |
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4921 | Serge | 161 | _CONST _PTR __restrict buf _AND |
4349 | Serge | 162 | size_t size _AND |
163 | size_t count _AND |
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164 | FILE * fp) |
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165 | { |
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166 | return _fwrite_r (_REENT, buf, size, count, fp); |
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167 | } |
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168 | #endif> |