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1 //======================================================================== |
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2 // |
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3 // fwrite.cxx |
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4 // |
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5 // ANSI Stdio fwrite() function |
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6 // |
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7 //======================================================================== |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Cygnus eCos Public License |
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12 // Version 1.0 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //======================================================================== |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): jlarmour@cygnus.co.uk |
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33 // Contributors: jlarmour@cygnus.co.uk |
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34 // Date: 1998-02-13 |
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35 // Purpose: |
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36 // Description: |
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37 // Usage: |
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38 // |
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39 //####DESCRIPTIONEND#### |
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40 // |
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41 //======================================================================== |
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42 |
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43 // CONFIGURATION |
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44 |
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45 #include <pkgconf/libc.h> // Configuration header |
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46 |
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47 // Include the C library? And do we want the stdio stuff? |
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48 #if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) |
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49 |
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50 // INCLUDES |
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51 |
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52 #include <cyg/infra/cyg_type.h> // Common project-wide type definitions |
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53 #include <cyg/infra/cyg_ass.h> // Assertion support |
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54 #include <cyg/infra/cyg_trac.h> // Tracing support |
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55 #include <stddef.h> // NULL and size_t from compiler |
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56 #include <stdio.h> // header for this file |
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57 #include <errno.h> // error codes |
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58 #include "clibincl/stdiosupp.hxx" // Support functions for stdio |
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59 #include "clibincl/stream.hxx" // Cyg_StdioStream |
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60 |
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61 // EXPORTED SYMBOLS |
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62 |
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63 externC size_t |
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64 fwrite( const void *, size_t, size_t , FILE * ) |
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65 CYGPRI_LIBC_WEAK_ALIAS("_fwrite"); |
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66 |
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67 // FUNCTIONS |
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68 |
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69 externC size_t |
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70 _fwrite( const void *ptr, size_t object_size, size_t num_objects, |
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71 FILE *stream ) |
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72 { |
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73 Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream; |
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74 cyg_ucount32 written; |
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75 Cyg_ErrNo err; |
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76 |
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77 CYG_REPORT_FUNCNAMETYPE( "_fwrite", "wrote %d objects" ); |
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78 CYG_REPORT_FUNCARG4( "ptr=%08x, object_size=%d, num_objects=%d, " |
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79 "stream=%08x", ptr, object_size, num_objects, |
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80 stream ); |
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81 |
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82 if ( (object_size==0) || (num_objects==0) ) { |
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83 CYG_REPORT_RETVAL(0); |
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84 return 0; |
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85 } // if |
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86 |
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87 err = real_stream->write( (cyg_uint8 *)ptr, num_objects*object_size, |
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88 &written ); |
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89 |
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90 if (err) { |
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91 real_stream->set_error( err ); |
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92 errno = err; |
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93 } // if |
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94 |
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95 // we return the number of _objects_ written. Simple division is |
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96 // sufficient as this returns the quotient rather than rounding |
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97 |
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98 CYG_REPORT_RETVAL( written/object_size ); |
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99 return written/object_size; |
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100 } // _fwrite() |
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101 |
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102 #endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) |
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103 |
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104 // EOF fwrite.cxx |
