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/*
* Samba Unix/Linux SMB client library
*
* Copyright (C) Gregor Beck 2010
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @brief Parser for registration entries (.reg) files.
* A parser is a talloced incarnation of an opaque struct reg_parse.
* It is fed with the (.reg) file line by line calling @ref reg_parse_line
* and emits output by calling functions from its reg_parse_callback.
* @file reg_parse.h
* @author Gregor Beck <gb@sernet.de>
* @date Jun 2010
*/
#ifndef REG_PARSE_H
#define REG_PARSE_H
#include <stdint.h>
#include <stdbool.h>
/**
* Prototype for function called on key found.
* The usual action to take is delete the key if del==true, open it if
* already existing or create a new one.
*
* @param private_data
* @param key
* @param klen number of elements in key
* @param del whether to delete the key
*
* @retval >=0 on success
*
* @see reg_format_key
*/
typedef int (*reg_parse_callback_key_t) (void* private_data,
const char* key[],
size_t klen,
bool del);
/**
* Prototype for function called on value found.
* The usual action to take is set the value of the last opened key.
*
* @param private_data
* @param name the values name
* @param type the values type
* @param data the values value
* @param len the number of bytes of data
*
* @retval >=0 on success
*
* @see reg_format_value
*/
typedef int (*reg_parse_callback_val_t) (void* private_data,
const char* name,
uint32_t type,
const uint8_t* data,
size_t len);
/**
* Prototype for function called on value delete found.
* Delete value from the last opened key. It is usually no error if
* no such value exist.
*
* @param private_data
* @param name
*
* @retval >=0 on success
*
* @see reg_format_value_delete
*/
typedef int (*reg_parse_callback_val_del_t) (void* private_data,
const char* name);
/**
* Prototype for function called on comment found.
*
* @param private_data
* @param line comment with marker removed.
*
* @retval >=0 on success
*
* @see reg_format_comment
*/
typedef int (*reg_parse_callback_comment_t) (void* private_data,
const char* line);
/**
* Type handling the output of a reg_parse object.
* It contains the functions to call and an opaque data pointer.
*/
typedef struct reg_parse_callback {
reg_parse_callback_key_t key; /**< Function called on key found */
reg_parse_callback_val_t val; /**< Function called on value found */
/** Function called on value delete found */
reg_parse_callback_val_del_t val_del;
/** Function called on comment found */
reg_parse_callback_comment_t comment;
void* data; /**< Private data passed to callback function */
} reg_parse_callback;
/**
* A Parser for a registration entries (.reg) file.
*
* It may be used as a reg_format_callback, so the following is valid:
* @code
* reg_format* f = reg_format_new(mem_ctx,
* (reg_format_callback)reg_parse_new(mem_ctx, cb, NULL, 0),
* NULL, 0, "\\");
* @endcode
* @see reg_format
*/
typedef struct reg_parse reg_parse;
/**
* Create a new reg_parse object.
*
* @param talloc_ctx the talloc parent
* @param cb the output handler
* @param str_enc the charset of hex encoded strings (REG_MULTI_SZ, REG_EXAND_SZ) if not UTF-16
* @param flags
*
* @return a talloc'ed reg_parse object, NULL on error
*/
reg_parse* reg_parse_new(const void* talloc_ctx,
reg_parse_callback cb,
const char* str_enc,
unsigned flags);
/**
* Feed one line to the parser.
*
* @param parser
* @param line one line from a (.reg) file, in UNIX charset
*
* @return 0 on success
*
* @see reg_format_callback_writeline_t
*/
int reg_parse_line(struct reg_parse* parser, const char* line);
/**
* Parse a (.reg) file, read from a file descriptor.
*
* @param fd the file descriptor
* @param cb the output handler
* @param opts
*
* @return 0 on success
*/
int reg_parse_fd(int fd,
const reg_parse_callback* cb,
const char* opts);
/**
* Parse a (.reg) file
*
* @param filename the file to open
* @param cb the output handler
* @param opts
*
* @return 0 on success
*/
int reg_parse_file(const char* filename,
const reg_parse_callback* cb,
const char* opts);
int reg_parse_set_options(reg_parse* parser, const char* opt);
/******************************************************************************/
#endif /* REG_PARSE_H */
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