Mercurial > hg > nginx-quic
view src/os/win32/ngx_files.c @ 271:e16dfb9b9afa
nginx-0.0.2-2004-02-26-20:10:01 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 26 Feb 2004 17:10:01 +0000 |
parents | c1f3a3c7c5db |
children | 7c7183b3ea8b |
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#include <ngx_config.h> #include <ngx_core.h> ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset) { size_t n; long high_offset; ngx_err_t err; OVERLAPPED ovlp, *povlp; if (ngx_win32_version < NGX_WIN_NT) { /* * in Win9X the overlapped pointer must be NULL * so we need to use SetFilePointer() to set the offset */ if (file->offset != offset) { /* * the maximum file size on FAT16 is 2G, but on FAT32 it's 4G so we * need to use high_offset because a single offset is signed value */ high_offset = (long) (offset >> 32); if (SetFilePointer(file->fd, (long) offset, &high_offset, FILE_BEGIN) == INVALID_SET_FILE_POINTER) { /* * INVALID_SET_FILE_POINTER is 0xffffffff and it can be valid * value for large file so we need also to check GetLastError() */ err = ngx_errno; if (err != NO_ERROR) { ngx_log_error(NGX_LOG_ERR, file->log, err, "SeekFilePointer() failed"); return NGX_ERROR; } } } povlp = NULL; } else { ovlp.Internal = 0; ovlp.InternalHigh = 0; ovlp.Offset = (DWORD) offset; ovlp.OffsetHigh = (DWORD) (offset >> 32); ovlp.hEvent = NULL; povlp = &ovlp; } if (ReadFile(file->fd, buf, size, &n, povlp) == 0) { ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "ReadFile() failed"); return NGX_ERROR; } file->offset += n; return n; } ssize_t ngx_write_file(ngx_file_t *file, char *buf, size_t size, off_t offset) { size_t n; long high_offset; ngx_err_t err; OVERLAPPED ovlp, *povlp; if (ngx_win32_version < NGX_WIN_NT) { /* * in Win9X the overlapped pointer must be NULL * so we need to use SetFilePointer() to set the offset */ if (file->offset != offset) { /* * the maximum file size on FAT16 is 2G, but on FAT32 it's 4G so we * need to use high_offset because a single offset is signed value */ high_offset = (long) (offset >> 32); if (SetFilePointer(file->fd, (long) offset, &high_offset, FILE_BEGIN) == INVALID_SET_FILE_POINTER) { /* * INVALID_SET_FILE_POINTER is 0xffffffff and it can be valid * value for large file so we need also to check GetLastError() */ err = ngx_errno; if (err != NO_ERROR) { ngx_log_error(NGX_LOG_ERR, file->log, err, "SeekFilePointer() failed"); return NGX_ERROR; } } } povlp = NULL; } else { ovlp.Internal = 0; ovlp.InternalHigh = 0; ovlp.Offset = (DWORD) offset; ovlp.OffsetHigh = (DWORD) (offset >> 32); ovlp.hEvent = NULL; povlp = &ovlp; } if (WriteFile(file->fd, buf, size, &n, povlp) == 0) { ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "WriteFile() failed"); return NGX_ERROR; } file->offset += n; return n; } ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, ngx_pool_t *pool) { char *buf, *prev; size_t size; ssize_t total, n; total = 0; while (cl) { buf = cl->hunk->pos; prev = buf; size = 0; /* coalesce the neighbouring hunks */ while (cl && prev == cl->hunk->pos) { size += cl->hunk->last - cl->hunk->pos; prev = cl->hunk->last; cl = cl->next; } n = ngx_write_file(file, buf, size, offset); if (n == NGX_ERROR) { return NGX_ERROR; } total += n; offset += n; } return total; } int ngx_win32_rename_file(ngx_str_t *from, ngx_str_t *to, ngx_pool_t *pool) { int rc, collision; u_int num; char *name; if (!(name = ngx_palloc(pool, to->len + 1 + 10 + 1 + sizeof("DELETE")))) { return NGX_ERROR; } ngx_memcpy(name, to->data, to->len); collision = 0; /* mutex_lock() (per cache or single ?) */ do { num = ngx_next_temp_number(collision); ngx_snprintf(name + to->len, 1 + 10 + 1 + sizeof("DELETE"), ".%010u.DELETE", num); if (MoveFile(to->data, name) == 0) { collision = 1; ngx_log_error(NGX_LOG_ERR, pool->log, ngx_errno, "MoveFile() failed"); } } while (collision); if (MoveFile(from->data, to->data) == 0) { rc = NGX_ERROR; } else { rc = NGX_OK; } if (ngx_win32_version >= NGX_WIN_NT) { if (DeleteFile(name) == 0) { ngx_log_error(NGX_LOG_ERR, pool->log, ngx_errno, "DeleteFile() failed"); } } else { /* TODO: Win9X: update the open files table */ } if (rc == NGX_ERROR) { ngx_log_error(NGX_LOG_ERR, pool->log, ngx_errno, "MoveFile() failed"); } /* mutex_unlock() */ return rc; } #if 0 int ngx_file_info(char *file, ngx_file_info_t *sb) { WIN32_FILE_ATTRIBUTE_DATA fa; /* NT4 and Win98 */ if (GetFileAttributesEx(file, GetFileExInfoStandard, &fa) == 0) { return NGX_ERROR; } sb->dwFileAttributes = fa.dwFileAttributes; sb->ftCreationTime = fa.ftCreationTime; sb->ftLastAccessTime = fa.ftLastAccessTime; sb->ftLastWriteTime = fa.ftLastWriteTime; sb->nFileSizeHigh = fa.nFileSizeHigh; sb->nFileSizeLow = fa.nFileSizeLow; return NGX_OK; } #endif int ngx_file_info(char *file, ngx_file_info_t *sb) { /* Win95 */ sb->dwFileAttributes = GetFileAttributes(file); if (sb->dwFileAttributes == INVALID_FILE_ATTRIBUTES) { return NGX_ERROR; } return NGX_OK; } int ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) { ngx_cpystrn(name->data + name->len, NGX_DIR_MASK, NGX_DIR_MASK_LEN + 1); dir->dir = FindFirstFile(name->data, &dir->fd); if (dir->dir == INVALID_HANDLE_VALUE) { return NGX_ERROR; } dir->info_valid = 1; dir->ready = 1; return NGX_OK; } int ngx_read_dir(ngx_dir_t *dir) { if (dir->ready) { dir->ready = 0; return NGX_OK; } if (FindNextFile(dir->dir, &dir->fd) == 0) { return NGX_ERROR; } return NGX_OK; } int ngx_file_append_mode(ngx_fd_t fd) { if (SetFilePointer(fd, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER) { if (ngx_errno != NO_ERROR) { return NGX_ERROR; } } return NGX_OK; }