/usr/include/libee/field.h is in libee-dev 0.4.1-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | /**
* @file field.h
* @brief The CEE nvfield object.
* @class ee_field field.h
*
*//*
*
* Libee - An Event Expression Library inspired by CEE
* Copyright 2010 by Rainer Gerhards and Adiscon GmbH.
*
* This file is part of libee.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* A copy of the LGPL v2.1 can be found in the file "COPYING" in this distribution.
*/
#ifndef LIBEE_FIELD_H_INCLUDED
#define LIBEE_FIELD_H_INCLUDED
#include "libee/valnode.h"
/**
* The Field object.
*
* Note that in CEE terms, this is called a "nvfield".
*
* This represents a name-value pair, whereby the name should correspond
* to a valid field type. However, depending on compliance level, name
* may not point to a valid field. For this reason, we do not require
* a pointer to the proper field definition.
*
* Fields may contain a variable number of values. However, the by far
* most common case is exactly one value. To support this effciently, we
* store the first value directly within the structure and the 2nd+ in
* a linked list.
*/
struct ee_field {
unsigned objID; /**< magic number to identify the object */
ee_ctx ctx; /**< associated library context */
es_str_t *name; /**< the field name */
unsigned char nVals; /**< number of values */
struct ee_value *val; /**< value assigned to this field */
struct ee_valnode *valroot; /**< list for 2nd+ values */
struct ee_valnode *valtail; /**< tail of the value list (for fast insert) */
};
/**
* Constructor for the ee_field object.
*
* @memberof ee_field
* @public
*
* @param[in] ctx library context
*
* @return pointer to new object or NULL if an error occured
*/
struct ee_field* ee_newField(ee_ctx ctx);
/**
* Constructor an ee_field object from a name value pair.
* TODO: is this legacy or do we need it in the future?
*
* @memberof ee_field
* @public
*
* @param[in] ctx library context
* @param[in] name field name
* @param[in] val value
*
* @return new field or NULL if an error occured
*/
struct ee_field* ee_newFieldFromNV(ee_ctx ctx, char *name, struct ee_value *val);
/**
* Destructor for the ee_field object.
*
* @memberof ee_field
* @public
*
* @param[in] field object to be destructed
*
* @param field The field to be discarded.
*/
void ee_deleteField(struct ee_field *field);
/**
* Name a field.
* Set the field name. This MUST NOT be called if a field name has
* already been established. Note that if the library is in validating mode,
* it may check the field name against the dictionary.
*
* @memberof ee_field
* @public
*
* @param[in] ctx library context
* @param[in] str field name
*
* @return 0 on success, something else otherwise
*/
int ee_nameField(struct ee_field *field, es_str_t *name);
/**
* Add a value to a field.
* Add the provided value to the list of field values. The value will
* be added as the \b last member of the field list (so calling sequence
* is important!). In validating mode, the library will check value
* cardinality against the dictionary.
*
* @memberof ee_field
* @public
*
* @param[in] ctx library context
* @param[in] val value to add to field
*
* @return 0 on success, something else otherwise
*/
int ee_addValueToField(struct ee_field *field, struct ee_value *val);
/**
* Add a string value to a field.
* This is primarily a shortcut to add a string value. For more
* details, see ee_addValueToField() doc, which also applies here.
*
* @memberof ee_field
* @public
*
* @param[in] field field to update
* @param[in] str string to add
*
* @return 0 on success, something else otherwise
*/
int ee_addStrValueToField(struct ee_field *field, es_str_t *str);
/**
* Encode the current field with all its values in syslog format
* and append this representation to the provided string.
*
* @memberof ee_value
* @public
*
* @param[in] field field to enocde
* @param[out] str string to wich the encoded value is to be added.
* Must have been allocated by the caller.
* @returns 0 on success, something else otherwise
*/
int ee_addField_Syslog(struct ee_field *value, es_str_t **str);
/**
* Encode the current field with all its values in XML format
* and append this representation to the provided string.
*
* @memberof ee_value
* @public
*
* @param[in] field field to enocde
* @param[out] str string to wich the encoded value is to be added.
* Must have been allocated by the caller.
* @returns 0 on success, something else otherwise
*/
int ee_addField_XML(struct ee_field *value, es_str_t **str);
/**
* Get the number of values the field has.
*
* @memberof ee_value
* @public
*
* @param[in] field relevant field
* @returns number of values
*/
int ee_getNumFieldVals(struct ee_field *field);
/**
* Get a specific value from this field as a string.
*
* @memberof ee_value
* @public
*
* @param[in] field relevant field
* @param[in] n number of the field to return, zero-based (like C arrays)
*
* @returns string representation of the n-th field value or NULL in
* case of error
*/
es_str_t* ee_getFieldValueAsStr(struct ee_field *field, unsigned short n);
/**
* Obtain the string representaton of a field.
* The string representation is build in the current
* default encoding (note: different encodings are NOT yet implemented
* at the time of this writing).
*
* @memberof ee_value
* @public
*
* @param[in] field relevant field
* @param[out] str output string with field representation. If NULL
* a new string is generated, the representation
* is APPENDED to the existing string.
*
* @returns 0 (EE_OK) on success, error code otherwise
*/
int ee_getFieldAsString(struct ee_field *field, es_str_t **str);
#endif /* #ifndef LIBEE_FIELD_H_INCLUDED */
|