lib/iniparser/src/iniparser.h

   1
   2 /*-------------------------------------------------------------------------*/
   3 /**
   4    @file    iniparser.h
   5    @author  N. Devillard
   6    @date    Mar 2000
   7    @version $Revision: 1.23 $
   8    @brief   Parser for ini files.
   9 */
  10 /*--------------------------------------------------------------------------*/
  11
  12 /*
  13         $Id: iniparser.h,v 1.23 2006-09-27 11:03:35 ndevilla Exp $
  14         $Author: ndevilla $
  15         $Date: 2006-09-27 11:03:35 $
  16         $Revision: 1.23 $
  17 */
  18
  19 #ifndef _INIPARSER_H_
  20 #define _INIPARSER_H_
  21
  22 /*---------------------------------------------------------------------------
  23                                                                 Includes
  24  ---------------------------------------------------------------------------*/
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 /*
  31  * The following #include is necessary on many Unixes but not Linux.
  32  * It is not needed for Windows platforms.
  33  * Uncomment it if needed.
  34  */
  35 /* #include <unistd.h> */
  36
  37 #include "dictionary.h"
  38
  39 /*-------------------------------------------------------------------------*/
  40 /**
  41   @brief    Get number of sections in a dictionary
  42   @param    d   Dictionary to examine
  43   @return   int Number of sections found in dictionary
  44
  45   This function returns the number of sections found in a dictionary.
  46   The test to recognize sections is done on the string stored in the
  47   dictionary: a section name is given as "section" whereas a key is
  48   stored as "section:key", thus the test looks for entries that do not
  49   contain a colon.
  50
  51   This clearly fails in the case a section name contains a colon, but
  52   this should simply be avoided.
  53
  54   This function returns -1 in case of error.
  55  */
  56 /*--------------------------------------------------------------------------*/
  57
  58 int iniparser_getnsec(dictionary * d);
  59
  60
  61 /*-------------------------------------------------------------------------*/
  62 /**
  63   @brief    Get name for section n in a dictionary.
  64   @param    d   Dictionary to examine
  65   @param    n   Section number (from 0 to nsec-1).
  66   @return   Pointer to char string
  67
  68   This function locates the n-th section in a dictionary and returns
  69   its name as a pointer to a string statically allocated inside the
  70   dictionary. Do not free or modify the returned string!
  71
  72   This function returns NULL in case of error.
  73  */
  74 /*--------------------------------------------------------------------------*/
  75
  76 char * iniparser_getsecname(dictionary * d, int n);
  77
  78
  79 /*-------------------------------------------------------------------------*/
  80 /**
  81   @brief    Save a dictionary to a loadable ini file
  82   @param    d   Dictionary to dump
  83   @param    f   Opened file pointer to dump to
  84   @return   void
  85
  86   This function dumps a given dictionary into a loadable ini file.
  87   It is Ok to specify @c stderr or @c stdout as output files.
  88  */
  89 /*--------------------------------------------------------------------------*/
  90
  91 void iniparser_dump_ini(dictionary * d, FILE * f);
  92
  93 /*-------------------------------------------------------------------------*/
  94 /**
  95   @brief    Dump a dictionary to an opened file pointer.
  96   @param    d   Dictionary to dump.
  97   @param    f   Opened file pointer to dump to.
  98   @return   void
  99
 100   This function prints out the contents of a dictionary, one element by
 101   line, onto the provided file pointer. It is OK to specify @c stderr
 102   or @c stdout as output files. This function is meant for debugging
 103   purposes mostly.
 104  */
 105 /*--------------------------------------------------------------------------*/
 106 void iniparser_dump(dictionary * d, FILE * f);
 107
 108 /*-------------------------------------------------------------------------*/
 109 /**
 110   @brief    Get the string associated to a key, return NULL if not found
 111   @param    d   Dictionary to search
 112   @param    key Key string to look for
 113   @return   pointer to statically allocated character string, or NULL.
 114
 115   This function queries a dictionary for a key. A key as read from an
 116   ini file is given as "section:key". If the key cannot be found,
 117   NULL is returned.
 118   The returned char pointer is pointing to a string allocated in
 119   the dictionary, do not free or modify it.
 120
 121   This function is only provided for backwards compatibility with
 122   previous versions of iniparser. It is recommended to use
 123   iniparser_getstring() instead.
 124  */
 125 /*--------------------------------------------------------------------------*/
 126 char * iniparser_getstr(dictionary * d, const char * key);
 127
 128
 129 /*-------------------------------------------------------------------------*/
 130 /**
 131   @brief    Get the string associated to a key
 132   @param    d       Dictionary to search
 133   @param    key     Key string to look for
 134   @param    def     Default value to return if key not found.
 135   @return   pointer to statically allocated character string
 136
 137   This function queries a dictionary for a key. A key as read from an
 138   ini file is given as "section:key". If the key cannot be found,
 139   the pointer passed as 'def' is returned.
 140   The returned char pointer is pointing to a string allocated in
 141   the dictionary, do not free or modify it.
 142  */
 143 /*--------------------------------------------------------------------------*/
 144 char * iniparser_getstring(dictionary * d, const char * key, char * def);
 145
 146 /*-------------------------------------------------------------------------*/
 147 /**
 148   @brief    Get the string associated to a key, convert to an int
 149   @param    d Dictionary to search
 150   @param    key Key string to look for
 151   @param    notfound Value to return in case of error
 152   @return   integer
 153
 154   This function queries a dictionary for a key. A key as read from an
 155   ini file is given as "section:key". If the key cannot be found,
 156   the notfound value is returned.
 157
 158   Supported values for integers include the usual C notation
 159   so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
 160   are supported. Examples:
 161
 162   - "42"      ->  42
 163   - "042"     ->  34 (octal -> decimal)
 164   - "0x42"    ->  66 (hexa  -> decimal)
 165
 166   Warning: the conversion may overflow in various ways. Conversion is
 167   totally outsourced to strtol(), see the associated man page for overflow
 168   handling.
 169
 170   Credits: Thanks to A. Becker for suggesting strtol()
 171  */
 172 /*--------------------------------------------------------------------------*/
 173 int iniparser_getint(dictionary * d, const char * key, int notfound);
 174
 175 /*-------------------------------------------------------------------------*/
 176 /**
 177   @brief    Get the string associated to a key, convert to a double
 178   @param    d Dictionary to search
 179   @param    key Key string to look for
 180   @param    notfound Value to return in case of error
 181   @return   double
 182
 183   This function queries a dictionary for a key. A key as read from an
 184   ini file is given as "section:key". If the key cannot be found,
 185   the notfound value is returned.
 186  */
 187 /*--------------------------------------------------------------------------*/
 188 double iniparser_getdouble(dictionary * d, char * key, double notfound);
 189
 190 /*-------------------------------------------------------------------------*/
 191 /**
 192   @brief    Get the string associated to a key, convert to a boolean
 193   @param    d Dictionary to search
 194   @param    key Key string to look for
 195   @param    notfound Value to return in case of error
 196   @return   integer
 197
 198   This function queries a dictionary for a key. A key as read from an
 199   ini file is given as "section:key". If the key cannot be found,
 200   the notfound value is returned.
 201
 202   A true boolean is found if one of the following is matched:
 203
 204   - A string starting with 'y'
 205   - A string starting with 'Y'
 206   - A string starting with 't'
 207   - A string starting with 'T'
 208   - A string starting with '1'
 209
 210   A false boolean is found if one of the following is matched:
 211
 212   - A string starting with 'n'
 213   - A string starting with 'N'
 214   - A string starting with 'f'
 215   - A string starting with 'F'
 216   - A string starting with '0'
 217
 218   The notfound value returned if no boolean is identified, does not
 219   necessarily have to be 0 or 1.
 220  */
 221 /*--------------------------------------------------------------------------*/
 222 int iniparser_getboolean(dictionary * d, const char * key, int notfound);
 223
 224
 225 /*-------------------------------------------------------------------------*/
 226 /**
 227   @brief    Set an entry in a dictionary.
 228   @param    ini     Dictionary to modify.
 229   @param    entry   Entry to modify (entry name)
 230   @param    val     New value to associate to the entry.
 231   @return   int 0 if Ok, -1 otherwise.
 232
 233   If the given entry can be found in the dictionary, it is modified to
 234   contain the provided value. If it cannot be found, -1 is returned.
 235   It is Ok to set val to NULL.
 236  */
 237 /*--------------------------------------------------------------------------*/
 238
 239 int iniparser_setstr(dictionary * ini, char * entry, char * val);
 240
 241 /*-------------------------------------------------------------------------*/
 242 /**
 243   @brief    Delete an entry in a dictionary
 244   @param    ini     Dictionary to modify
 245   @param    entry   Entry to delete (entry name)
 246   @return   void
 247
 248   If the given entry can be found, it is deleted from the dictionary.
 249  */
 250 /*--------------------------------------------------------------------------*/
 251 void iniparser_unset(dictionary * ini, char * entry);
 252
 253 /*-------------------------------------------------------------------------*/
 254 /**
 255   @brief    Finds out if a given entry exists in a dictionary
 256   @param    ini     Dictionary to search
 257   @param    entry   Name of the entry to look for
 258   @return   integer 1 if entry exists, 0 otherwise
 259
 260   Finds out if a given entry exists in the dictionary. Since sections
 261   are stored as keys with NULL associated values, this is the only way
 262   of querying for the presence of sections in a dictionary.
 263  */
 264 /*--------------------------------------------------------------------------*/
 265 int iniparser_find_entry(dictionary * ini, char * entry) ;
 266
 267 /*-------------------------------------------------------------------------*/
 268 /**
 269   @brief    Parse an ini file and return an allocated dictionary object
 270   @param    ininame Name of the ini file to read.
 271   @return   Pointer to newly allocated dictionary
 272
 273   This is the parser for ini files. This function is called, providing
 274   the name of the file to be read. It returns a dictionary object that
 275   should not be accessed directly, but through accessor functions
 276   instead.
 277
 278   The returned dictionary must be freed using iniparser_freedict().
 279  */
 280 /*--------------------------------------------------------------------------*/
 281 dictionary * iniparser_load(const char * ininame);
 282
 283 /*-------------------------------------------------------------------------*/
 284 /**
 285   @brief    Free all memory associated to an ini dictionary
 286   @param    d Dictionary to free
 287   @return   void
 288
 289   Free all memory associated to an ini dictionary.
 290   It is mandatory to call this function before the dictionary object
 291   gets out of the current context.
 292  */
 293 /*--------------------------------------------------------------------------*/
 294 void iniparser_freedict(dictionary * d);
 295
 296 #endif