Benny Prijono | 9033e31 | 2005-11-21 02:08:39 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C)2003-2006 Benny Prijono <benny@prijono.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pj/file_io.h> |
| 20 | #include <pj/errno.h> |
| 21 | #include <pj/assert.h> |
| 22 | |
| 23 | #include <windows.h> |
| 24 | |
| 25 | #ifndef INVALID_SET_FILE_POINTER |
| 26 | # define INVALID_SET_FILE_POINTER ((DWORD)-1) |
| 27 | #endif |
| 28 | |
| 29 | /** |
| 30 | * Check for end-of-file condition on the specified descriptor. |
| 31 | * |
| 32 | * @param fd The file descriptor. |
| 33 | * @param access The desired access. |
| 34 | * |
| 35 | * @return Non-zero if file is EOF. |
| 36 | */ |
| 37 | PJ_DECL(pj_bool_t) pj_file_eof(pj_oshandle_t fd, |
| 38 | enum pj_file_access access); |
| 39 | |
| 40 | |
| 41 | PJ_DEF(pj_status_t) pj_file_open( pj_pool_t *pool, |
| 42 | const char *pathname, |
| 43 | unsigned flags, |
| 44 | pj_oshandle_t *fd) |
| 45 | { |
| 46 | HANDLE hFile; |
| 47 | DWORD dwDesiredAccess = 0; |
| 48 | DWORD dwShareMode = 0; |
| 49 | DWORD dwCreationDisposition = 0; |
| 50 | DWORD dwFlagsAndAttributes = 0; |
| 51 | |
| 52 | PJ_UNUSED_ARG(pool); |
| 53 | |
| 54 | PJ_ASSERT_RETURN(pathname!=NULL, PJ_EINVAL); |
| 55 | |
| 56 | if ((flags & PJ_O_WRONLY) == PJ_O_WRONLY) { |
| 57 | dwDesiredAccess |= GENERIC_WRITE; |
| 58 | if ((flags & PJ_O_APPEND) == PJ_O_APPEND) { |
| 59 | dwDesiredAccess |= FILE_APPEND_DATA; |
| 60 | } else { |
| 61 | dwDesiredAccess &= ~(FILE_APPEND_DATA); |
| 62 | dwCreationDisposition |= CREATE_ALWAYS; |
| 63 | } |
| 64 | } |
| 65 | if ((flags & PJ_O_RDONLY) == PJ_O_RDONLY) { |
| 66 | dwDesiredAccess |= GENERIC_READ; |
| 67 | if (flags == PJ_O_RDONLY) |
| 68 | dwCreationDisposition |= OPEN_EXISTING; |
| 69 | } |
| 70 | |
| 71 | if (dwDesiredAccess == 0) { |
| 72 | pj_assert(!"Invalid file open flags"); |
| 73 | return PJ_EINVAL; |
| 74 | } |
| 75 | |
| 76 | dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE; |
| 77 | dwFlagsAndAttributes = FILE_ATTRIBUTE_NORMAL; |
| 78 | |
| 79 | hFile = CreateFile(pathname, dwDesiredAccess, dwShareMode, NULL, |
| 80 | dwCreationDisposition, dwFlagsAndAttributes, NULL); |
| 81 | if (hFile == INVALID_HANDLE_VALUE) { |
| 82 | *fd = 0; |
| 83 | return PJ_RETURN_OS_ERROR(GetLastError()); |
| 84 | } |
| 85 | |
| 86 | *fd = hFile; |
| 87 | return PJ_SUCCESS; |
| 88 | } |
| 89 | |
| 90 | PJ_DEF(pj_status_t) pj_file_close(pj_oshandle_t fd) |
| 91 | { |
| 92 | if (CloseHandle(fd)==0) |
| 93 | return PJ_RETURN_OS_ERROR(GetLastError()); |
| 94 | return PJ_SUCCESS; |
| 95 | } |
| 96 | |
| 97 | PJ_DEF(pj_status_t) pj_file_write( pj_oshandle_t fd, |
| 98 | const void *data, |
| 99 | pj_ssize_t *size) |
| 100 | { |
| 101 | BOOL rc; |
| 102 | DWORD bytesWritten; |
| 103 | |
| 104 | rc = WriteFile(fd, data, *size, &bytesWritten, NULL); |
| 105 | if (!rc) { |
| 106 | *size = -1; |
| 107 | return PJ_RETURN_OS_ERROR(GetLastError()); |
| 108 | } |
| 109 | |
| 110 | *size = bytesWritten; |
| 111 | return PJ_SUCCESS; |
| 112 | } |
| 113 | |
| 114 | PJ_DEF(pj_status_t) pj_file_read( pj_oshandle_t fd, |
| 115 | void *data, |
| 116 | pj_ssize_t *size) |
| 117 | { |
| 118 | BOOL rc; |
| 119 | DWORD bytesRead; |
| 120 | |
| 121 | rc = ReadFile(fd, data, *size, &bytesRead, NULL); |
| 122 | if (!rc) { |
| 123 | *size = -1; |
| 124 | return PJ_RETURN_OS_ERROR(GetLastError()); |
| 125 | } |
| 126 | |
| 127 | *size = bytesRead; |
| 128 | return PJ_SUCCESS; |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | PJ_DEF(pj_bool_t) pj_file_eof(pj_oshandle_t fd, enum pj_file_access access) |
| 133 | { |
| 134 | BOOL rc; |
| 135 | DWORD dummy = 0, bytes; |
| 136 | DWORD dwStatus; |
| 137 | |
| 138 | if ((access & PJ_O_RDONLY) == PJ_O_RDONLY) { |
| 139 | rc = ReadFile(fd, &dummy, 0, &bytes, NULL); |
| 140 | } else if ((access & PJ_O_WRONLY) == PJ_O_WRONLY) { |
| 141 | rc = WriteFile(fd, &dummy, 0, &bytes, NULL); |
| 142 | } else { |
| 143 | pj_assert(!"Invalid access"); |
| 144 | return PJ_TRUE; |
| 145 | } |
| 146 | |
| 147 | dwStatus = GetLastError(); |
| 148 | if (dwStatus==ERROR_HANDLE_EOF) |
| 149 | return PJ_TRUE; |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | */ |
| 154 | |
| 155 | PJ_DEF(pj_status_t) pj_file_setpos( pj_oshandle_t fd, |
| 156 | pj_off_t offset, |
| 157 | enum pj_file_seek_type whence) |
| 158 | { |
| 159 | DWORD dwMoveMethod; |
| 160 | DWORD dwNewPos; |
| 161 | LONG hi32; |
| 162 | |
| 163 | if (whence == PJ_SEEK_SET) |
| 164 | dwMoveMethod = FILE_BEGIN; |
| 165 | else if (whence == PJ_SEEK_CUR) |
| 166 | dwMoveMethod = FILE_CURRENT; |
| 167 | else if (whence == PJ_SEEK_END) |
| 168 | dwMoveMethod = FILE_END; |
| 169 | else { |
| 170 | pj_assert(!"Invalid whence in file_setpos"); |
| 171 | return PJ_EINVAL; |
| 172 | } |
| 173 | |
| 174 | hi32 = (LONG)(offset >> 32); |
| 175 | dwNewPos = SetFilePointer(fd, (long)offset, &hi32, dwMoveMethod); |
| 176 | if (dwNewPos == (DWORD)INVALID_SET_FILE_POINTER) { |
| 177 | DWORD dwStatus = GetLastError(); |
| 178 | if (dwStatus != 0) |
| 179 | return PJ_RETURN_OS_ERROR(dwStatus); |
| 180 | /* dwNewPos actually is not an error. */ |
| 181 | } |
| 182 | |
| 183 | return PJ_SUCCESS; |
| 184 | } |
| 185 | |
| 186 | PJ_DEF(pj_status_t) pj_file_getpos( pj_oshandle_t fd, |
| 187 | pj_off_t *pos) |
| 188 | { |
| 189 | LONG hi32 = 0; |
| 190 | DWORD lo32; |
| 191 | |
| 192 | lo32 = SetFilePointer(fd, 0, &hi32, FILE_CURRENT); |
| 193 | if (lo32 == (DWORD)INVALID_SET_FILE_POINTER) { |
| 194 | DWORD dwStatus = GetLastError(); |
| 195 | if (dwStatus != 0) |
| 196 | return PJ_RETURN_OS_ERROR(dwStatus); |
| 197 | } |
| 198 | |
| 199 | *pos = hi32; |
| 200 | *pos = (*pos << 32) + lo32; |
| 201 | return PJ_SUCCESS; |
| 202 | } |
| 203 | |