ossp-pkg/var/var.h
1.16
/*
** VAR - OSSP variable expression library.
** Copyright (c) 2001 The OSSP Project (http://www.ossp.org/)
** Copyright (c) 2001 Cable & Wireless Deutschland (http://www.cw.com/de/)
**
** This file is part of OSSP VAR, an extensible data serialization
** library which can be found at http://www.ossp.org/pkg/var/.
**
** Permission to use, copy, modify, and distribute this software for
** any purpose with or without fee is hereby granted, provided that
** the above copyright notice and this permission notice appear in all
** copies.
**
** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
**
** var.h: VAR library API
*/
#ifndef __VAR_H__
#define __VAR_H__
#include <stdlib.h>
/* Error codes returned by the varexp library. */
typedef enum {
VAR_ERR_CALLBACK = -64,
VAR_ERR_DIVISION_BY_ZERO_IN_INDEX = -41,
VAR_ERR_UNCLOSED_BRACKET_IN_INDEX = -40,
VAR_ERR_INCOMPLETE_INDEX_SPEC = -39,
VAR_ERR_INVALID_CHAR_IN_INDEX_SPEC = -38,
VAR_ERR_ARRAY_LOOKUPS_ARE_UNSUPPORTED = -37,
VAR_ERR_INCOMPLETE_QUOTED_PAIR = -36,
VAR_ERR_INVALID_ARGUMENT = -35,
VAR_ERR_SUBMATCH_OUT_OF_RANGE = -34,
VAR_ERR_UNKNOWN_QUOTED_PAIR_IN_REPLACE = -33,
VAR_ERR_EMPTY_PADDING_FILL_STRING = -32,
VAR_ERR_MISSING_PADDING_WIDTH = -31,
VAR_ERR_MALFORMATTED_PADDING = -30,
VAR_ERR_INCORRECT_TRANSPOSE_CLASS_SPEC = -29,
VAR_ERR_EMPTY_TRANSPOSE_CLASS = -28,
VAR_ERR_TRANSPOSE_CLASSES_MISMATCH = -27,
VAR_ERR_MALFORMATTED_TRANSPOSE = -26,
VAR_ERR_OFFSET_LOGIC = -25,
VAR_ERR_OFFSET_OUT_OF_BOUNDS = -24,
VAR_ERR_RANGE_OUT_OF_BOUNDS = -23,
VAR_ERR_INVALID_OFFSET_DELIMITER = -22,
VAR_ERR_MISSING_START_OFFSET = -21,
VAR_ERR_EMPTY_SEARCH_STRING = -20,
VAR_ERR_MISSING_PARAMETER_IN_COMMAND = -19,
VAR_ERR_INVALID_REGEX_IN_REPLACE = -18,
VAR_ERR_UNKNOWN_REPLACE_FLAG = -17,
VAR_ERR_MALFORMATTED_REPLACE = -16,
VAR_ERR_UNKNOWN_COMMAND_CHAR = -14,
VAR_ERR_INPUT_ISNT_TEXT_NOR_VARIABLE = -13,
VAR_ERR_UNDEFINED_VARIABLE = -12,
VAR_ERR_INCOMPLETE_VARIABLE_SPEC = -11,
VAR_ERR_OUT_OF_MEMORY = -10,
VAR_ERR_INVALID_CONFIGURATION = -9,
VAR_ERR_INCORRECT_CLASS_SPEC = -8,
VAR_ERR_INCOMPLETE_GROUPED_HEX = -7,
VAR_ERR_INCOMPLETE_OCTAL = -6,
VAR_ERR_INVALID_OCTAL = -5,
VAR_ERR_OCTAL_TOO_LARGE = -4,
VAR_ERR_INVALID_HEX = -3,
VAR_ERR_INCOMPLETE_HEX = -2,
VAR_ERR_INCOMPLETE_NAMED_CHARACTER = -1,
VAR_OK = 0
} var_rc_t;
/* Expand quoted pairs to their binary representation. */
var_rc_t var_unescape(const char *src, size_t len, char *dst,
int unescape_all);
/* Prototype for the lookup callback used in var_expand(). */
typedef int (*var_cb_t) (void *context,
const char *varname, size_t name_len, int index,
const char **data, size_t *data_len,
size_t *buffer_size);
/* Configure the var_expand() parser's tokens. */
typedef struct {
char varinit; /* '$' */
char startdelim; /* '{' */
char enddelim; /* '}' */
char startindex; /* '[' */
char endindex; /* ']' */
char current_index; /* '#' */
char escape; /* '\' */
char *namechars; /* 'a-zA-Z0-9_' */
} var_config_t;
extern const var_config_t var_config_default;
/* Expand variable expressions in a text buffer. */
var_rc_t var_expand(const char *input, size_t input_len,
char **result, size_t *result_len,
var_cb_t lookup, void *lookup_context,
const var_config_t *config, int force_expand);
/* Map an error code to a text message. */
const char* var_strerror(var_rc_t rc);
#endif /* __VAR_H__ */