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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_FILES_H_INCLUDED_
#define _NGX_FILES_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef HANDLE                      ngx_fd_t;
typedef BY_HANDLE_FILE_INFORMATION  ngx_file_info_t;
typedef uint64_t                    ngx_file_uniq_t;


typedef struct {
    u_char                         *name;
    size_t                          size;
    void                           *addr;
    ngx_fd_t                        fd;
    HANDLE                          handle;
    ngx_log_t                      *log;
} ngx_file_mapping_t;


typedef struct {
    HANDLE                          dir;
    WIN32_FIND_DATAW                finddata;

    u_char                         *name;
    size_t                          namelen;
    size_t                          allocated;

    unsigned                        valid_info:1;
    unsigned                        type:1;
    unsigned                        ready:1;
} ngx_dir_t;


typedef struct {
    HANDLE                          dir;
    WIN32_FIND_DATAW                finddata;

    unsigned                        ready:1;
    unsigned                        test:1;
    unsigned                        no_match:1;

    u_char                         *pattern;
    ngx_str_t                       name;
    size_t                          last;
    ngx_log_t                      *log;
} ngx_glob_t;



/* INVALID_FILE_ATTRIBUTES is specified but not defined at least in MSVC6SP2 */
#ifndef INVALID_FILE_ATTRIBUTES
#define INVALID_FILE_ATTRIBUTES     0xffffffff
#endif

/* INVALID_SET_FILE_POINTER is not defined at least in MSVC6SP2 */
#ifndef INVALID_SET_FILE_POINTER
#define INVALID_SET_FILE_POINTER    0xffffffff
#endif


#define NGX_INVALID_FILE            INVALID_HANDLE_VALUE
#define NGX_FILE_ERROR              0


ngx_fd_t ngx_open_file(u_char *name, u_long mode, u_long create, u_long access);
#define ngx_open_file_n             "CreateFile()"

#define NGX_FILE_RDONLY             GENERIC_READ
#define NGX_FILE_WRONLY             GENERIC_WRITE
#define NGX_FILE_RDWR               GENERIC_READ|GENERIC_WRITE
#define NGX_FILE_APPEND             FILE_APPEND_DATA|SYNCHRONIZE
#define NGX_FILE_NONBLOCK           0

#define NGX_FILE_CREATE_OR_OPEN     OPEN_ALWAYS
#define NGX_FILE_OPEN               OPEN_EXISTING
#define NGX_FILE_TRUNCATE           CREATE_ALWAYS

#define NGX_FILE_DEFAULT_ACCESS     0
#define NGX_FILE_OWNER_ACCESS       0


ngx_fd_t ngx_open_tempfile(u_char *name, ngx_uint_t persistent,
    ngx_uint_t access);
#define ngx_open_tempfile_n         "CreateFile()"


#define ngx_close_file              CloseHandle
#define ngx_close_file_n            "CloseHandle()"


ssize_t ngx_read_fd(ngx_fd_t fd, void *buf, size_t size);
#define ngx_read_fd_n               "ReadFile()"


ssize_t ngx_write_fd(ngx_fd_t fd, void *buf, size_t size);
#define ngx_write_fd_n              "WriteFile()"


ssize_t ngx_write_console(ngx_fd_t fd, void *buf, size_t size);


#define ngx_linefeed(p)             *p++ = CR; *p++ = LF;
#define NGX_LINEFEED_SIZE           2
#define NGX_LINEFEED                CRLF


ngx_int_t ngx_delete_file(u_char *name);
#define ngx_delete_file_n           "DeleteFile()"


ngx_int_t ngx_rename_file(u_char *from, u_char *to);
#define ngx_rename_file_n           "MoveFile()"
ngx_err_t ngx_win32_rename_file(ngx_str_t *from, ngx_str_t *to, ngx_log_t *log);



ngx_int_t ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s);
#define ngx_set_file_time_n         "SetFileTime()"


ngx_int_t ngx_file_info(u_char *filename, ngx_file_info_t *fi);
#define ngx_file_info_n             "GetFileAttributesEx()"


#define ngx_fd_info(fd, fi)         GetFileInformationByHandle(fd, fi)
#define ngx_fd_info_n               "GetFileInformationByHandle()"


#define ngx_link_info(name, fi)     ngx_file_info(name, fi)
#define ngx_link_info_n             "GetFileAttributesEx()"


#define ngx_is_dir(fi)                                                       \
    (((fi)->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
#define ngx_is_file(fi)                                                      \
    (((fi)->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
#define ngx_is_link(fi)     0
#define ngx_is_exec(fi)     0

#define ngx_file_access(fi) 0

#define ngx_file_size(fi)                                                    \
    (((off_t) (fi)->nFileSizeHigh << 32) | (fi)->nFileSizeLow)
#define ngx_file_fs_size(fi)        ngx_file_size(fi)

#define ngx_file_uniq(fi)                                                    \
    (((ngx_file_uniq_t) (fi)->nFileIndexHigh << 32) | (fi)->nFileIndexLow)


/* 116444736000000000 is commented in src/os/win32/ngx_time.c */

#define ngx_file_mtime(fi)                                                   \
 (time_t) (((((unsigned __int64) (fi)->ftLastWriteTime.dwHighDateTime << 32) \
                               | (fi)->ftLastWriteTime.dwLowDateTime)        \
                                          - 116444736000000000) / 10000000)

ngx_int_t ngx_create_file_mapping(ngx_file_mapping_t *fm);
void ngx_close_file_mapping(ngx_file_mapping_t *fm);


u_char *ngx_realpath(u_char *path, u_char *resolved);
#define ngx_realpath_n              ""


size_t ngx_getcwd(u_char *buf, size_t size);
#define ngx_getcwd_n                "GetCurrentDirectory()"


#define ngx_path_separator(c)       ((c) == '/' || (c) == '\\')

#define NGX_HAVE_MAX_PATH           1
#define NGX_MAX_PATH                MAX_PATH


ngx_int_t ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir);
#define ngx_open_dir_n              "FindFirstFile()"


ngx_int_t ngx_read_dir(ngx_dir_t *dir);
#define ngx_read_dir_n              "FindNextFile()"


ngx_int_t ngx_close_dir(ngx_dir_t *dir);
#define ngx_close_dir_n             "FindClose()"


ngx_int_t ngx_create_dir(u_char *name, ngx_uint_t access);
#define ngx_create_dir_n            "CreateDirectory()"


ngx_int_t ngx_delete_dir(u_char *name);
#define ngx_delete_dir_n            "RemoveDirectory()"


#define ngx_dir_access(a)           (a)


#define ngx_de_name(dir)            (dir)->name
#define ngx_de_namelen(dir)         (dir)->namelen

ngx_int_t ngx_de_info(u_char *name, ngx_dir_t *dir);
#define ngx_de_info_n               "dummy()"

ngx_int_t ngx_de_link_info(u_char *name, ngx_dir_t *dir);
#define ngx_de_link_info_n          "dummy()"

#define ngx_de_is_dir(dir)                                                   \
    (((dir)->finddata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
#define ngx_de_is_file(dir)                                                  \
    (((dir)->finddata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
#define ngx_de_is_link(dir)         0
#define ngx_de_access(dir)          0
#define ngx_de_size(dir)                                                     \
  (((off_t) (dir)->finddata.nFileSizeHigh << 32) | (dir)->finddata.nFileSizeLow)
#define ngx_de_fs_size(dir)         ngx_de_size(dir)

/* 116444736000000000 is commented in src/os/win32/ngx_time.c */

#define ngx_de_mtime(dir)                                                    \
    (time_t) (((((unsigned __int64)                                          \
                     (dir)->finddata.ftLastWriteTime.dwHighDateTime << 32)   \
                      | (dir)->finddata.ftLastWriteTime.dwLowDateTime)       \
                                          - 116444736000000000) / 10000000)


ngx_int_t ngx_open_glob(ngx_glob_t *gl);
#define ngx_open_glob_n             "FindFirstFile()"

ngx_int_t ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name);
void ngx_close_glob(ngx_glob_t *gl);


ssize_t ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset);
#define ngx_read_file_n             "ReadFile()"

ssize_t ngx_write_file(ngx_file_t *file, u_char *buf, size_t size,
    off_t offset);

ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *ce,
    off_t offset, ngx_pool_t *pool);

ngx_int_t ngx_read_ahead(ngx_fd_t fd, size_t n);
#define ngx_read_ahead_n            "ngx_read_ahead_n"

ngx_int_t ngx_directio_on(ngx_fd_t fd);
#define ngx_directio_on_n           "ngx_directio_on_n"

ngx_int_t ngx_directio_off(ngx_fd_t fd);
#define ngx_directio_off_n          "ngx_directio_off_n"

size_t ngx_fs_bsize(u_char *name);
off_t ngx_fs_available(u_char *name);


#define ngx_stdout               GetStdHandle(STD_OUTPUT_HANDLE)
#define ngx_stderr               GetStdHandle(STD_ERROR_HANDLE)
#define ngx_set_stderr(fd)       SetStdHandle(STD_ERROR_HANDLE, fd)
#define ngx_set_stderr_n         "SetStdHandle(STD_ERROR_HANDLE)"


#endif /* _NGX_FILES_H_INCLUDED_ */

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