repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* 7zFile.c -- File IO
|
| 2 | 2009-11-24 : Igor Pavlov : Public domain */
|
| 3 |
|
| 4 | #include "7zFile.h"
|
| 5 |
|
| 6 | #ifndef USE_WINDOWS_FILE
|
| 7 |
|
| 8 | #ifndef UNDER_CE
|
| 9 | #include <errno.h>
|
| 10 | #endif
|
| 11 |
|
| 12 | #else
|
| 13 |
|
| 14 | /*
|
| 15 | ReadFile and WriteFile functions in Windows have BUG:
|
| 16 | If you Read or Write 64MB or more (probably min_failure_size = 64MB - 32KB + 1)
|
| 17 | from/to Network file, it returns ERROR_NO_SYSTEM_RESOURCES
|
| 18 | (Insufficient system resources exist to complete the requested service).
|
| 19 | Probably in some version of Windows there are problems with other sizes:
|
| 20 | for 32 MB (maybe also for 16 MB).
|
| 21 | And message can be "Network connection was lost"
|
| 22 | */
|
| 23 |
|
| 24 | #define kChunkSizeMax (1 << 22)
|
| 25 |
|
| 26 | #endif
|
| 27 |
|
| 28 | void File_Construct(CSzFile *p)
|
| 29 | {
|
| 30 | #ifdef USE_WINDOWS_FILE
|
| 31 | p->handle = INVALID_HANDLE_VALUE;
|
| 32 | #else
|
| 33 | p->file = NULL;
|
| 34 | #endif
|
| 35 | }
|
| 36 |
|
| 37 | #if !defined(UNDER_CE) || !defined(USE_WINDOWS_FILE)
|
| 38 | static WRes File_Open(CSzFile *p, const char *name, int writeMode)
|
| 39 | {
|
| 40 | #ifdef USE_WINDOWS_FILE
|
| 41 | p->handle = CreateFileA(name,
|
| 42 | writeMode ? GENERIC_WRITE : GENERIC_READ,
|
| 43 | FILE_SHARE_READ, NULL,
|
| 44 | writeMode ? CREATE_ALWAYS : OPEN_EXISTING,
|
| 45 | FILE_ATTRIBUTE_NORMAL, NULL);
|
| 46 | return (p->handle != INVALID_HANDLE_VALUE) ? 0 : GetLastError();
|
| 47 | #else
|
| 48 | p->file = fopen(name, writeMode ? "wb+" : "rb");
|
| 49 | return (p->file != 0) ? 0 :
|
| 50 | #ifdef UNDER_CE
|
| 51 | 2; /* ENOENT */
|
| 52 | #else
|
| 53 | errno;
|
| 54 | #endif
|
| 55 | #endif
|
| 56 | }
|
| 57 |
|
| 58 | WRes InFile_Open(CSzFile *p, const char *name) { return File_Open(p, name, 0); }
|
| 59 | WRes OutFile_Open(CSzFile *p, const char *name) { return File_Open(p, name, 1); }
|
| 60 | #endif
|
| 61 |
|
| 62 | #ifdef USE_WINDOWS_FILE
|
| 63 | static WRes File_OpenW(CSzFile *p, const WCHAR *name, int writeMode)
|
| 64 | {
|
| 65 | p->handle = CreateFileW(name,
|
| 66 | writeMode ? GENERIC_WRITE : GENERIC_READ,
|
| 67 | FILE_SHARE_READ, NULL,
|
| 68 | writeMode ? CREATE_ALWAYS : OPEN_EXISTING,
|
| 69 | FILE_ATTRIBUTE_NORMAL, NULL);
|
| 70 | return (p->handle != INVALID_HANDLE_VALUE) ? 0 : GetLastError();
|
| 71 | }
|
| 72 | WRes InFile_OpenW(CSzFile *p, const WCHAR *name) { return File_OpenW(p, name, 0); }
|
| 73 | WRes OutFile_OpenW(CSzFile *p, const WCHAR *name) { return File_OpenW(p, name, 1); }
|
| 74 | #endif
|
| 75 |
|
| 76 | WRes File_Close(CSzFile *p)
|
| 77 | {
|
| 78 | #ifdef USE_WINDOWS_FILE
|
| 79 | if (p->handle != INVALID_HANDLE_VALUE)
|
| 80 | {
|
| 81 | if (!CloseHandle(p->handle))
|
| 82 | return GetLastError();
|
| 83 | p->handle = INVALID_HANDLE_VALUE;
|
| 84 | }
|
| 85 | #else
|
| 86 | if (p->file != NULL)
|
| 87 | {
|
| 88 | int res = fclose(p->file);
|
| 89 | if (res != 0)
|
| 90 | return res;
|
| 91 | p->file = NULL;
|
| 92 | }
|
| 93 | #endif
|
| 94 | return 0;
|
| 95 | }
|
| 96 |
|
| 97 | WRes File_Read(CSzFile *p, void *data, size_t *size)
|
| 98 | {
|
| 99 | size_t originalSize = *size;
|
| 100 | if (originalSize == 0)
|
| 101 | return 0;
|
| 102 |
|
| 103 | #ifdef USE_WINDOWS_FILE
|
| 104 |
|
| 105 | *size = 0;
|
| 106 | do
|
| 107 | {
|
| 108 | DWORD curSize = (originalSize > kChunkSizeMax) ? kChunkSizeMax : (DWORD)originalSize;
|
| 109 | DWORD processed = 0;
|
| 110 | BOOL res = ReadFile(p->handle, data, curSize, &processed, NULL);
|
| 111 | data = (void *)((Byte *)data + processed);
|
| 112 | originalSize -= processed;
|
| 113 | *size += processed;
|
| 114 | if (!res)
|
| 115 | return GetLastError();
|
| 116 | if (processed == 0)
|
| 117 | break;
|
| 118 | }
|
| 119 | while (originalSize > 0);
|
| 120 | return 0;
|
| 121 |
|
| 122 | #else
|
| 123 |
|
| 124 | *size = fread(data, 1, originalSize, p->file);
|
| 125 | if (*size == originalSize)
|
| 126 | return 0;
|
| 127 | return ferror(p->file);
|
| 128 |
|
| 129 | #endif
|
| 130 | }
|
| 131 |
|
| 132 | WRes File_Write(CSzFile *p, const void *data, size_t *size)
|
| 133 | {
|
| 134 | size_t originalSize = *size;
|
| 135 | if (originalSize == 0)
|
| 136 | return 0;
|
| 137 |
|
| 138 | #ifdef USE_WINDOWS_FILE
|
| 139 |
|
| 140 | *size = 0;
|
| 141 | do
|
| 142 | {
|
| 143 | DWORD curSize = (originalSize > kChunkSizeMax) ? kChunkSizeMax : (DWORD)originalSize;
|
| 144 | DWORD processed = 0;
|
| 145 | BOOL res = WriteFile(p->handle, data, curSize, &processed, NULL);
|
| 146 | data = (void *)((Byte *)data + processed);
|
| 147 | originalSize -= processed;
|
| 148 | *size += processed;
|
| 149 | if (!res)
|
| 150 | return GetLastError();
|
| 151 | if (processed == 0)
|
| 152 | break;
|
| 153 | }
|
| 154 | while (originalSize > 0);
|
| 155 | return 0;
|
| 156 |
|
| 157 | #else
|
| 158 |
|
| 159 | *size = fwrite(data, 1, originalSize, p->file);
|
| 160 | if (*size == originalSize)
|
| 161 | return 0;
|
| 162 | return ferror(p->file);
|
| 163 |
|
| 164 | #endif
|
| 165 | }
|
| 166 |
|
| 167 | WRes File_Seek(CSzFile *p, Int64 *pos, ESzSeek origin)
|
| 168 | {
|
| 169 | #ifdef USE_WINDOWS_FILE
|
| 170 |
|
| 171 | LARGE_INTEGER value;
|
| 172 | DWORD moveMethod;
|
| 173 | value.LowPart = (DWORD)*pos;
|
| 174 | value.HighPart = (LONG)((UInt64)*pos >> 16 >> 16); /* for case when UInt64 is 32-bit only */
|
| 175 | switch (origin)
|
| 176 | {
|
| 177 | case SZ_SEEK_SET: moveMethod = FILE_BEGIN; break;
|
| 178 | case SZ_SEEK_CUR: moveMethod = FILE_CURRENT; break;
|
| 179 | case SZ_SEEK_END: moveMethod = FILE_END; break;
|
| 180 | default: return ERROR_INVALID_PARAMETER;
|
| 181 | }
|
| 182 | value.LowPart = SetFilePointer(p->handle, value.LowPart, &value.HighPart, moveMethod);
|
| 183 | if (value.LowPart == 0xFFFFFFFF)
|
| 184 | {
|
| 185 | WRes res = GetLastError();
|
| 186 | if (res != NO_ERROR)
|
| 187 | return res;
|
| 188 | }
|
| 189 | *pos = ((Int64)value.HighPart << 32) | value.LowPart;
|
| 190 | return 0;
|
| 191 |
|
| 192 | #else
|
| 193 |
|
| 194 | int moveMethod;
|
| 195 | int res;
|
| 196 | switch (origin)
|
| 197 | {
|
| 198 | case SZ_SEEK_SET: moveMethod = SEEK_SET; break;
|
| 199 | case SZ_SEEK_CUR: moveMethod = SEEK_CUR; break;
|
| 200 | case SZ_SEEK_END: moveMethod = SEEK_END; break;
|
| 201 | default: return 1;
|
| 202 | }
|
| 203 | res = fseek(p->file, (long)*pos, moveMethod);
|
| 204 | *pos = ftell(p->file);
|
| 205 | return res;
|
| 206 |
|
| 207 | #endif
|
| 208 | }
|
| 209 |
|
| 210 | WRes File_GetLength(CSzFile *p, UInt64 *length)
|
| 211 | {
|
| 212 | #ifdef USE_WINDOWS_FILE
|
| 213 |
|
| 214 | DWORD sizeHigh;
|
| 215 | DWORD sizeLow = GetFileSize(p->handle, &sizeHigh);
|
| 216 | if (sizeLow == 0xFFFFFFFF)
|
| 217 | {
|
| 218 | DWORD res = GetLastError();
|
| 219 | if (res != NO_ERROR)
|
| 220 | return res;
|
| 221 | }
|
| 222 | *length = (((UInt64)sizeHigh) << 32) + sizeLow;
|
| 223 | return 0;
|
| 224 |
|
| 225 | #else
|
| 226 |
|
| 227 | long pos = ftell(p->file);
|
| 228 | int res = fseek(p->file, 0, SEEK_END);
|
| 229 | *length = ftell(p->file);
|
| 230 | fseek(p->file, pos, SEEK_SET);
|
| 231 | return res;
|
| 232 |
|
| 233 | #endif
|
| 234 | }
|
| 235 |
|
| 236 |
|
| 237 | /* ---------- FileSeqInStream ---------- */
|
| 238 |
|
| 239 | static SRes FileSeqInStream_Read(void *pp, void *buf, size_t *size)
|
| 240 | {
|
| 241 | CFileSeqInStream *p = (CFileSeqInStream *)pp;
|
| 242 | return File_Read(&p->file, buf, size) == 0 ? SZ_OK : SZ_ERROR_READ;
|
| 243 | }
|
| 244 |
|
| 245 | void FileSeqInStream_CreateVTable(CFileSeqInStream *p)
|
| 246 | {
|
| 247 | p->s.Read = FileSeqInStream_Read;
|
| 248 | }
|
| 249 |
|
| 250 |
|
| 251 | /* ---------- FileInStream ---------- */
|
| 252 |
|
| 253 | static SRes FileInStream_Read(void *pp, void *buf, size_t *size)
|
| 254 | {
|
| 255 | CFileInStream *p = (CFileInStream *)pp;
|
| 256 | return (File_Read(&p->file, buf, size) == 0) ? SZ_OK : SZ_ERROR_READ;
|
| 257 | }
|
| 258 |
|
| 259 | static SRes FileInStream_Seek(void *pp, Int64 *pos, ESzSeek origin)
|
| 260 | {
|
| 261 | CFileInStream *p = (CFileInStream *)pp;
|
| 262 | return File_Seek(&p->file, pos, origin);
|
| 263 | }
|
| 264 |
|
| 265 | void FileInStream_CreateVTable(CFileInStream *p)
|
| 266 | {
|
| 267 | p->s.Read = FileInStream_Read;
|
| 268 | p->s.Seek = FileInStream_Seek;
|
| 269 | }
|
| 270 |
|
| 271 |
|
| 272 | /* ---------- FileOutStream ---------- */
|
| 273 |
|
| 274 | static size_t FileOutStream_Write(void *pp, const void *data, size_t size)
|
| 275 | {
|
| 276 | CFileOutStream *p = (CFileOutStream *)pp;
|
| 277 | File_Write(&p->file, data, &size);
|
| 278 | return size;
|
| 279 | }
|
| 280 |
|
| 281 | void FileOutStream_CreateVTable(CFileOutStream *p)
|
| 282 | {
|
| 283 | p->s.Write = FileOutStream_Write;
|
| 284 | }
|