new file mode 100644
--- /dev/null
+++ b/src/core/ngx_conf_file.h
@@ -0,0 +1,295 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_HTTP_CONF_FILE_H_INCLUDED_
+#define _NGX_HTTP_CONF_FILE_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+/*
+ *        AAAA  number of agruments
+ *      FF      command flags
+ *    TT        command type, i.e. HTTP "location" or "server" command
+ */
+
+#define NGX_CONF_NOARGS      0x00000001
+#define NGX_CONF_TAKE1       0x00000002
+#define NGX_CONF_TAKE2       0x00000004
+#define NGX_CONF_TAKE3       0x00000008
+#define NGX_CONF_TAKE4       0x00000010
+#define NGX_CONF_TAKE5       0x00000020
+#define NGX_CONF_TAKE6       0x00000040
+#define NGX_CONF_TAKE7       0x00000080
+
+#define NGX_CONF_TAKE12      (NGX_CONF_TAKE1|NGX_CONF_TAKE2)
+#define NGX_CONF_TAKE13      (NGX_CONF_TAKE1|NGX_CONF_TAKE3)
+
+#define NGX_CONF_TAKE23      (NGX_CONF_TAKE2|NGX_CONF_TAKE3)
+
+#define NGX_CONF_TAKE1234    (NGX_CONF_TAKE1|NGX_CONF_TAKE2|NGX_CONF_TAKE3   \
+                              |NGX_CONF_TAKE4)
+
+#define NGX_CONF_ARGS_NUMBER 0x000000ff
+#define NGX_CONF_BLOCK       0x00000100
+#define NGX_CONF_FLAG        0x00000200
+#define NGX_CONF_ANY         0x00000400
+#define NGX_CONF_1MORE       0x00000800
+#define NGX_CONF_2MORE       0x00001000
+
+#define NGX_DIRECT_CONF      0x00010000
+
+#define NGX_MAIN_CONF        0x01000000
+#define NGX_ANY_CONF         0x0F000000
+
+
+
+#define NGX_CONF_UNSET       -1
+#define NGX_CONF_UNSET_UINT  (ngx_uint_t) -1
+#define NGX_CONF_UNSET_PTR   (void *) -1
+#define NGX_CONF_UNSET_SIZE  (size_t) -1
+#define NGX_CONF_UNSET_MSEC  (ngx_msec_t) -1
+
+
+#define NGX_CONF_OK          NULL
+#define NGX_CONF_ERROR       (void *) -1
+
+#define NGX_CONF_BLOCK_DONE  1
+#define NGX_CONF_FILE_DONE   2
+
+#define NGX_MODULE           0, 0
+
+#define NGX_CORE_MODULE      0x45524F43  /* "CORE" */
+#define NGX_CONF_MODULE      0x464E4F43  /* "CONF" */
+
+
+#define NGX_MAX_CONF_ERRSTR  256
+
+
+struct ngx_command_s {
+    ngx_str_t     name;
+    int           type;
+    char       *(*set)(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+    int           conf;
+    int           offset;
+    void         *post;
+};
+
+#define ngx_null_command   { ngx_null_string, 0, NULL, 0, 0, NULL }
+
+
+struct ngx_open_file_s {
+    ngx_fd_t   fd;
+    ngx_str_t  name;
+#if 0
+    /* e.g. append mode, error_log */
+    int        flags;
+    /* e.g. reopen db file */
+    int      (*handler)(void *data, ngx_open_file_t *file);
+    void      *data;
+#endif
+};
+
+
+struct ngx_module_s {
+    ngx_uint_t       ctx_index;
+    ngx_uint_t       index;
+    void            *ctx;
+    ngx_command_t   *commands;
+    ngx_uint_t       type;
+    ngx_int_t      (*init_module)(ngx_cycle_t *cycle);
+    ngx_int_t      (*init_process)(ngx_cycle_t *cycle);
+#if 0
+    ngx_int_t      (*init_thread)(ngx_cycle_t *cycle);
+#endif
+};
+
+
+typedef struct {
+    ngx_str_t       name;
+    void         *(*create_conf)(ngx_cycle_t *cycle);
+    char         *(*init_conf)(ngx_cycle_t *cycle, void *conf);
+} ngx_core_module_t; 
+
+
+typedef struct {
+    ngx_file_t   file;
+    ngx_buf_t   *buffer;
+    ngx_uint_t   line;
+} ngx_conf_file_t;
+
+
+typedef char *(*ngx_conf_handler_pt)(ngx_conf_t *cf,
+                                     ngx_command_t *dummy, void *conf);
+
+
+struct ngx_conf_s {
+    char                 *name;
+    ngx_array_t          *args;
+
+    ngx_cycle_t          *cycle;
+    ngx_pool_t           *pool;
+    ngx_conf_file_t      *conf_file;
+    ngx_log_t            *log;
+
+    void                 *ctx;
+    ngx_uint_t            module_type;
+    ngx_uint_t            cmd_type;
+
+    ngx_conf_handler_pt   handler;
+    char                 *handler_conf;
+};
+
+
+typedef char *(*ngx_conf_post_handler_pt) (ngx_conf_t *cf,
+                                           void *data, void *conf);
+
+typedef struct {
+    ngx_conf_post_handler_pt  post_handler;
+} ngx_conf_post_t;
+
+
+typedef struct {
+    ngx_conf_post_handler_pt  post_handler;
+    int                       low;
+    int                       high;
+} ngx_conf_num_bounds_t;
+
+
+typedef struct {
+    ngx_str_t   name;
+    ngx_uint_t  value;
+} ngx_conf_enum_t;
+
+
+#define NGX_CONF_BITMASK_SET  1
+
+typedef struct {
+    ngx_str_t   name;
+    ngx_uint_t  mask;
+} ngx_conf_bitmask_t;
+
+
+char *ngx_conf_check_num_bounds(ngx_conf_t *cf, void *post, void *data);
+
+
+#define ngx_get_conf(conf_ctx, module)  conf_ctx[module.index]
+
+
+
+#define ngx_conf_init_value(conf, default)                                   \
+    if (conf == NGX_CONF_UNSET) {                                            \
+        conf = default;                                                      \
+    }
+
+#define ngx_conf_init_ptr_value(conf, default)                               \
+    if (conf == NGX_CONF_UNSET_PTR) {                                        \
+        conf = default;                                                      \
+    }
+
+#define ngx_conf_init_unsigned_value(conf, default)                          \
+    if (conf == (unsigned) NGX_CONF_UNSET) {                                 \
+        conf = default;                                                      \
+    }
+
+#define ngx_conf_init_size_value(conf, default)                              \
+    if (conf == NGX_CONF_UNSET_SIZE) {                                       \
+        conf = default;                                                      \
+    }
+
+#define ngx_conf_init_msec_value(conf, default)                              \
+    if (conf == NGX_CONF_UNSET_MSEC) {                                       \
+        conf = default;                                                      \
+    }
+
+#define ngx_conf_merge_value(conf, prev, default)                            \
+    if (conf == NGX_CONF_UNSET) {                                            \
+        conf = (prev == NGX_CONF_UNSET) ? default : prev;                    \
+    }
+
+#define ngx_conf_merge_ptr_value(conf, prev, default)                        \
+    if (conf == NULL) {                                                      \
+        conf = (prev == NULL) ? default : prev;                              \
+    }
+
+#define ngx_conf_merge_unsigned_value(conf, prev, default)                   \
+    if (conf == NGX_CONF_UNSET_UINT) {                                       \
+        conf = (prev == NGX_CONF_UNSET_UINT) ? default : prev;               \
+    }
+
+#define ngx_conf_merge_msec_value(conf, prev, default)                       \
+    if (conf == NGX_CONF_UNSET_MSEC) {                                       \
+        conf = (prev == NGX_CONF_UNSET_MSEC) ? default : prev;               \
+    }
+
+#define ngx_conf_merge_sec_value(conf, prev, default)                        \
+    if (conf == NGX_CONF_UNSET) {                                            \
+        conf = (prev == NGX_CONF_UNSET) ? default : prev;                    \
+    }
+
+#define ngx_conf_merge_size_value(conf, prev, default)                       \
+    if (conf == NGX_CONF_UNSET_SIZE) {                                       \
+        conf = (prev == NGX_CONF_UNSET_SIZE) ? default : prev;               \
+    }
+
+#define ngx_conf_merge_str_value(conf, prev, default)                        \
+    if (conf.len == 0) {                                                     \
+        if (prev.len) {                                                      \
+            conf.len = prev.len;                                             \
+            conf.data = prev.data;                                           \
+        } else {                                                             \
+            conf.len = sizeof(default) - 1;                                  \
+            conf.data = (u_char *) default;                                  \
+        }                                                                    \
+    }
+
+#define ngx_conf_merge_bufs_value(conf, prev, default_num, default_size)     \
+    if (conf.num == 0) {                                                     \
+        if (prev.num) {                                                      \
+            conf.num = prev.num;                                             \
+            conf.size = prev.size;                                           \
+        } else {                                                             \
+            conf.num = default_num;                                          \
+            conf.size = default_size;                                        \
+        }                                                                    \
+    }
+
+#define ngx_conf_merge_bitmask_value(conf, prev, default)                    \
+    if (conf == 0) {                                                         \
+        conf = (prev == 0) ? default : prev;                                 \
+    }
+
+
+#define addressof(addr)  ((int) &addr)
+
+
+char *ngx_conf_parse(ngx_conf_t *cf, ngx_str_t *filename);
+
+
+ngx_int_t ngx_conf_full_name(ngx_cycle_t *cycle, ngx_str_t *name);
+ngx_open_file_t *ngx_conf_open_file(ngx_cycle_t *cycle, ngx_str_t *name);
+void ngx_conf_log_error(ngx_uint_t level, ngx_conf_t *cf, ngx_err_t err,
+                        char *fmt, ...);
+
+
+char *ngx_conf_set_flag_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_str_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_num_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_size_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_msec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_sec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_bufs_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_enum_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_bitmask_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+
+
+extern ngx_uint_t     ngx_max_module;
+extern ngx_module_t  *ngx_modules[];
+
+
+#endif /* _NGX_HTTP_CONF_FILE_H_INCLUDED_ */