DXGL r271 - Code Review

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Repository:DXGL
Revision:< r270‎ | r271 | r272 >
Date:16:15, 20 October 2012
Author:admin
Status:new
Tags:
Comment:
minilibc: Add fopen and _wfopen
Modified paths:
  • /minilibc/file.c (modified) (history)

Diff [purge]

Index: minilibc/file.c
——@@ -116,6 +116,8 @@
117117
118118 FILE *fopen(const char *filename, const char *mode)
119119 {
 120+ int ptr = -1;
 121+ int i;
120122 if(!filename) return NULL;
121123 if(!mode) return NULL;
122124 if(!minilibc_files)
——@@ -129,23 +131,165 @@
130132 memset(minilibc_files,0,128*sizeof(minilibc_FILE));
131133 maxfiles = 128;
132134 }
133 - minilibc_files[filecount].mode = decode_filemode(mode);
134 - if(minilibc_files[filecount].mode & MODE_ERROR)
 135+ for(i = 0; i < filecount; i++)
135136 {
 137+ if(minilibc_files[i].handle == INVALID_HANDLE_VALUE)
 138+ {
 139+ ptr = i;
 140+ break;
 141+ }
 142+ }
 143+ if(ptr == -1) ptr = filecount++;
 144+ if(filecount >= maxfiles)
 145+ {
 146+ minilibc_FILE *tmpptr = (minilibc_FILE*)realloc(minilibc_files,(128+maxfiles)*sizeof(minilibc_FILE));
 147+ if(!tmpptr)
 148+ {
 149+ errno = ENOMEM;
 150+ return NULL;
 151+ }
 152+ maxfiles += 128;
 153+ minilibc_files = tmpptr;
 154+ }
 155+ minilibc_files[ptr].mode = decode_filemode(mode,&minilibc_files[ptr]);
 156+ if(minilibc_files[ptr].mode & MODE_ERROR)
 157+ {
136158 errno = EINVAL;
137159 return NULL;
138160 }
139 - minilibc_files[filecount].handle = CreateFileA(filename,minilibc_files[filecount].DesiredAccess,
140 - minilibc_files[filecount].ShareMode,NULL,minilibc_files[filecount].CreationDisposition,
 161+ minilibc_files[ptr].handle = CreateFileA(filename,minilibc_files[ptr].DesiredAccess,
 162+ minilibc_files[ptr].ShareMode,NULL,minilibc_files[ptr].CreationDisposition,
141163 FILE_ATTRIBUTE_NORMAL,NULL);
142 - if(minilibc_files[filecount].handle == INVALID_HANDLE_VALUE)
 164+ if(minilibc_files[ptr].handle == INVALID_HANDLE_VALUE)
143165 {
144166 errno = EINVAL;
145167 return NULL;
146168 }
147 - filecount++;
148 - if(filecount > maxfiles)
 169+ return (FILE*)&minilibc_files[ptr];
 170+}
 171+
 172+static unsigned int _w_decode_filemode(const WCHAR *mode, minilibc_FILE *file)
 173+{
 174+ unsigned int ret = 0;
 175+ int i = 0;
 176+ while(mode[i] != 0)
149177 {
 178+ switch(mode[i])
 179+ {
 180+ case L'r':
 181+ ret |= MODE_READ;
 182+ break;
 183+ case L'w':
 184+ ret |= MODE_WRITE;
 185+ break;
 186+ case L'a':
 187+ ret |= MODE_APPEND;
 188+ break;
 189+ case L'+':
 190+ ret |= MODE_PLUS;
 191+ break;
 192+ case L't':
 193+ ret |= MODE_TEXT;
 194+ break;
 195+ case L'b':
 196+ ret |= MODE_BINARY;
 197+ break;
 198+ }
 199+ i++;
 200+ }
 201+ if(((ret & MODE_READ) && (ret & MODE_WRITE)) || ((ret & MODE_READ) && (ret & MODE_APPEND))
 202+ || ((ret & MODE_WRITE) && (ret & MODE_APPEND)) || ((ret & MODE_TEXT) && (ret & MODE_BINARY)))
 203+ ret |= MODE_ERROR;
 204+ switch(ret & MODE_RWMASK)
 205+ {
 206+ case 0:
 207+ case MODE_PLUS:
 208+ ret |= MODE_ERROR;
 209+ break;
 210+ case MODE_READ:
 211+ file->DesiredAccess = GENERIC_READ;
 212+ file->ShareMode = FILE_SHARE_READ;
 213+ file->CreationDisposition = OPEN_EXISTING;
 214+ break;
 215+ case MODE_WRITE:
 216+ file->DesiredAccess = GENERIC_WRITE;
 217+ file->ShareMode = 0;
 218+ file->CreationDisposition = CREATE_ALWAYS;
 219+ break;
 220+ case MODE_APPEND:
 221+ file->DesiredAccess = GENERIC_READ|GENERIC_WRITE;
 222+ file->ShareMode = 0;
 223+ file->CreationDisposition = OPEN_ALWAYS;
 224+ break;
 225+ case MODE_READ|MODE_PLUS:
 226+ file->DesiredAccess = GENERIC_READ|GENERIC_WRITE;
 227+ file->ShareMode = 0;
 228+ file->CreationDisposition = OPEN_EXISTING;
 229+ break;
 230+ case MODE_WRITE|MODE_PLUS:
 231+ file->DesiredAccess = GENERIC_READ|GENERIC_WRITE;
 232+ file->ShareMode = 0;
 233+ file->CreationDisposition = CREATE_ALWAYS;
 234+ break;
 235+ case MODE_APPEND|MODE_PLUS:
 236+ file->DesiredAccess = GENERIC_READ|GENERIC_WRITE;
 237+ file->ShareMode = 0;
 238+ file->CreationDisposition = OPEN_ALWAYS;
 239+ break;
 240+ }
 241+ return ret;
 242+}
150243
 244+FILE *_wfopen(const WCHAR *filename, const WCHAR *mode)
 245+{
 246+ int ptr = -1;
 247+ int i;
 248+ if(!filename) return NULL;
 249+ if(!mode) return NULL;
 250+ if(!minilibc_files)
 251+ {
 252+ minilibc_files = (minilibc_FILE*)malloc(128*sizeof(minilibc_FILE));
 253+ if(!minilibc_files)
 254+ {
 255+ errno = ENOMEM;
 256+ return NULL;
 257+ }
 258+ memset(minilibc_files,0,128*sizeof(minilibc_FILE));
 259+ maxfiles = 128;
151260 }
152 -}
\ No newline at end of file
 261+ for(i = 0; i < filecount; i++)
 262+ {
 263+ if(minilibc_files[i].handle == INVALID_HANDLE_VALUE)
 264+ {
 265+ ptr = i;
 266+ break;
 267+ }
 268+ }
 269+ if(ptr == -1) ptr = filecount++;
 270+ if(filecount >= maxfiles)
 271+ {
 272+ minilibc_FILE *tmpptr = (minilibc_FILE*)realloc(minilibc_files,(128+maxfiles)*sizeof(minilibc_FILE));
 273+ if(!tmpptr)
 274+ {
 275+ errno = ENOMEM;
 276+ return NULL;
 277+ }
 278+ maxfiles += 128;
 279+ minilibc_files = tmpptr;
 280+ }
 281+ minilibc_files[ptr].mode = _w_decode_filemode(mode,&minilibc_files[ptr]);
 282+ if(minilibc_files[ptr].mode & MODE_ERROR)
 283+ {
 284+ errno = EINVAL;
 285+ return NULL;
 286+ }
 287+ minilibc_files[ptr].handle = CreateFileW(filename,minilibc_files[ptr].DesiredAccess,
 288+ minilibc_files[ptr].ShareMode,NULL,minilibc_files[ptr].CreationDisposition,
 289+ FILE_ATTRIBUTE_NORMAL,NULL);
 290+ if(minilibc_files[ptr].handle == INVALID_HANDLE_VALUE)
 291+ {
 292+ errno = EINVAL;
 293+ return NULL;
 294+ }
 295+ return (FILE*)&minilibc_files[ptr];
 296+}
Retrieved from "https://dxgl.org/wiki/Special:Code/DXGL/271"