icuSources/tools/toolutil/filestrm.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 ******************************************************************************
   5 *
   6 *   Copyright (C) 1997-2011, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 ******************************************************************************
  10 *
  11 * File FILESTRM.C
  12 *
  13 * @author       Glenn Marcy
  14 *
  15 * Modification History:
  16 *
  17 *   Date        Name        Description
  18 *   5/8/98      gm          Created
  19 *  03/02/99     stephen     Reordered params in ungetc to match stdio
  20 *                           Added wopen
  21 *   3/29/99     helena      Merged Stephen and Bertrand's changes.
  22 *
  23 ******************************************************************************
  24 */
  25
  26 #include "filestrm.h"
  27
  28 #include "cmemory.h"
  29
  30 #include <stdio.h>
  31
  32 U_CAPI FileStream* U_EXPORT2
  33 T_FileStream_open(const char* filename, const char* mode)
  34 {
  35     if(filename != NULL && *filename != 0 && mode != NULL && *mode != 0) {
  36         FILE *file = fopen(filename, mode);
  37         return (FileStream*)file;
  38     } else {
  39         return NULL;
  40     }
  41 }
  42
  43 /*
  44 U_CAPI FileStream* U_EXPORT2
  45 T_FileStream_wopen(const wchar_t* filename, const wchar_t* mode)
  46 {
  47    // TBD: _wfopen is believed to be MS-specific?
  48 #if U_PLATFORM_USES_ONLY_WIN32_API
  49     FILE* result = _wfopen(filename, mode);
  50     return (FileStream*)result;
  51 #else
  52     size_t fnMbsSize, mdMbsSize;
  53     char *fn, *md;
  54     FILE *result;
  55
  56     // convert from wchar_t to char
  57     fnMbsSize = wcstombs(NULL, filename, ((size_t)-1) >> 1);
  58     fn = (char*)uprv_malloc(fnMbsSize+2);
  59     wcstombs(fn, filename, fnMbsSize);
  60     fn[fnMbsSize] = 0;
  61
  62     mdMbsSize = wcstombs(NULL, mode, ((size_t)-1) >> 1);
  63     md = (char*)uprv_malloc(mdMbsSize+2);
  64     wcstombs(md, mode, mdMbsSize);
  65     md[mdMbsSize] = 0;
  66
  67     result = fopen(fn, md);
  68     uprv_free(fn);
  69     uprv_free(md);
  70     return (FileStream*)result;
  71 #endif
  72 }
  73 */
  74 U_CAPI void U_EXPORT2
  75 T_FileStream_close(FileStream* fileStream)
  76 {
  77     if (fileStream != 0)
  78         fclose((FILE*)fileStream);
  79 }
  80
  81 U_CAPI UBool U_EXPORT2
  82 T_FileStream_file_exists(const char* filename)
  83 {
  84     FILE* temp = fopen(filename, "r");
  85     if (temp) {
  86         fclose(temp);
  87         return TRUE;
  88     } else
  89         return FALSE;
  90 }
  91
  92 /*static const int32_t kEOF;
  93 const int32_t FileStream::kEOF = EOF;*/
  94
  95 /*
  96 U_CAPI FileStream*
  97 T_FileStream_tmpfile()
  98 {
  99     FILE* file = tmpfile();
 100     return (FileStream*)file;
 101 }
 102 */
 103
 104 U_CAPI int32_t U_EXPORT2
 105 T_FileStream_read(FileStream* fileStream, void* addr, int32_t len)
 106 {
 107     return static_cast<int32_t>(fread(addr, 1, len, (FILE*)fileStream));
 108 }
 109
 110 U_CAPI int32_t U_EXPORT2
 111 T_FileStream_write(FileStream* fileStream, const void* addr, int32_t len)
 112 {
 113
 114     return static_cast<int32_t>(fwrite(addr, 1, len, (FILE*)fileStream));
 115 }
 116
 117 U_CAPI void U_EXPORT2
 118 T_FileStream_rewind(FileStream* fileStream)
 119 {
 120     rewind((FILE*)fileStream);
 121 }
 122
 123 U_CAPI int32_t U_EXPORT2
 124 T_FileStream_putc(FileStream* fileStream, int32_t ch)
 125 {
 126     int32_t c = fputc(ch, (FILE*)fileStream);
 127     return c;
 128 }
 129
 130 U_CAPI int U_EXPORT2
 131 T_FileStream_getc(FileStream* fileStream)
 132 {
 133     int c = fgetc((FILE*)fileStream);
 134     return c;
 135 }
 136
 137 U_CAPI int32_t U_EXPORT2
 138 T_FileStream_ungetc(int32_t ch, FileStream* fileStream)
 139 {
 140
 141     int32_t c = ungetc(ch, (FILE*)fileStream);
 142     return c;
 143 }
 144
 145 U_CAPI int32_t U_EXPORT2
 146 T_FileStream_peek(FileStream* fileStream)
 147 {
 148     int32_t c = fgetc((FILE*)fileStream);
 149     return ungetc(c, (FILE*)fileStream);
 150 }
 151
 152 U_CAPI char* U_EXPORT2
 153 T_FileStream_readLine(FileStream* fileStream, char* buffer, int32_t length)
 154 {
 155     return fgets(buffer, length, (FILE*)fileStream);
 156 }
 157
 158 U_CAPI int32_t U_EXPORT2
 159 T_FileStream_writeLine(FileStream* fileStream, const char* buffer)
 160 {
 161     return fputs(buffer, (FILE*)fileStream);
 162 }
 163
 164 U_CAPI int32_t U_EXPORT2
 165 T_FileStream_size(FileStream* fileStream)
 166 {
 167     int32_t savedPos = ftell((FILE*)fileStream);
 168     int32_t size = 0;
 169
 170     /*Changes by Bertrand A. D. doesn't affect the current position
 171     goes to the end of the file before ftell*/
 172     fseek((FILE*)fileStream, 0, SEEK_END);
 173     size = (int32_t)ftell((FILE*)fileStream);
 174     fseek((FILE*)fileStream, savedPos, SEEK_SET);
 175     return size;
 176 }
 177
 178 U_CAPI int U_EXPORT2
 179 T_FileStream_eof(FileStream* fileStream)
 180 {
 181     return feof((FILE*)fileStream);
 182 }
 183
 184 /*
 185  Warning
 186  This function may not work consistently on all platforms
 187  (e.g. HP-UX, FreeBSD and MacOSX don't return an error when
 188  putc is used on a file opened as readonly)
 189 */
 190 U_CAPI int U_EXPORT2
 191 T_FileStream_error(FileStream* fileStream)
 192 {
 193     return (fileStream == 0 || ferror((FILE*)fileStream));
 194 }
 195
 196 /* This function doesn't work. */
 197 /* force the stream to set its error flag*/
 198 /*U_CAPI void U_EXPORT2
 199 T_FileStream_setError(FileStream* fileStream)
 200 {
 201     fseek((FILE*)fileStream, 99999, SEEK_SET);
 202 }
 203 */
 204
 205 U_CAPI FileStream* U_EXPORT2
 206 T_FileStream_stdin(void)
 207 {
 208     return (FileStream*)stdin;
 209 }
 210
 211 U_CAPI FileStream* U_EXPORT2
 212 T_FileStream_stdout(void)
 213 {
 214     return (FileStream*)stdout;
 215 }
 216
 217
 218 U_CAPI FileStream* U_EXPORT2
 219 T_FileStream_stderr(void)
 220 {
 221     return (FileStream*)stderr;
 222 }
 223
 224 U_CAPI UBool U_EXPORT2
 225 T_FileStream_remove(const char* fileName){
 226     return (remove(fileName) == 0);
 227 }