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iniparser.h
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iniparser.h
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/**
* @file iniparser.h
* @author N. Devillard
* @brief Parser for ini files.
*/
#ifndef _INIPARSER_H_
#define _INIPARSER_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dictionary.h"
/**
* @brief Get number of sections in a dictionary
* @param d Dictionary to examine
* @return int Number of sections found in dictionary
* This function returns the number of sections found in a dictionary.
* The test to recognize sections is done on the string stored in the
* dictionary: a section name is given as "section" whereas a key is
* stored as "section:key", thus the test looks for entries that do not
* contain a colon.
* This clearly fails in the case a section name contains a colon, but
* this should simply be avoided.
* This function returns -1 in case of error.
*/
int iniparser_getnsec(dictionary * d);
/**
* @brief Get name for section n in a dictionary.
* @param d Dictionary to examine
* @param n Section number (from 0 to nsec-1).
* @return Pointer to char string
* This function locates the n-th section in a dictionary and returns
* its name as a pointer to a string statically allocated inside the
* dictionary. Do not free or modify the returned string!
* This function returns NULL in case of error.
*/
char * iniparser_getsecname(dictionary * d, int n);
/**
* @brief Save a dictionary to a loadable ini file
* @param d Dictionary to dump
* @param f Opened file pointer to dump to
* @return void
* This function dumps a given dictionary into a loadable ini file.
* It is Ok to specify @c stderr or @c stdout as output files.
*/
void iniparser_dump_ini(dictionary * d, FILE * f);
/**
* @brief Save a dictionary section to a loadable ini file
* @param d Dictionary to dump
* @param s Section name of dictionary to dump
* @param f Opened file pointer to dump to
* @return void
*
* This function dumps a given section of a given dictionary into a loadable ini
* file. It is Ok to specify @c stderr or @c stdout as output files.
*/
void iniparser_dumpsection_ini(dictionary * d, char * s, FILE * f);
/**
* @brief Save a dictionary section to a loadable ini file
* @param d Dictionary to dump
* @param s Section name of dictionary to dump
* @return char*
*
* This function dumps a given section of a given dictionary into a loadable ini file.
*/
char* iniparser_dumpsection_ini_char(dictionary * d, char * s);
/**
* @brief Dump a dictionary to an opened file pointer.
* @param d Dictionary to dump.
* @param f Opened file pointer to dump to.
* @return void
*
* This function prints out the contents of a dictionary, one element by
* line, onto the provided file pointer. It is OK to specify @c stderr
* or @c stdout as output files. This function is meant for debugging
* purposes mostly.
*/
void iniparser_dump(dictionary * d, FILE * f);
/**
* @brief Get the number of keys in a section of a dictionary.
* @param d Dictionary to examine
* @param s Section name of dictionary to examine
* @return Number of keys in section
*/
int iniparser_getsecnkeys(dictionary * d, char * s);
/**
* @brief Get the number of keys in a section of a dictionary.
* @param d Dictionary to examine
* @param s Section name of dictionary to examine
* @return pointer to statically allocated character strings
*
* This function queries a dictionary and finds all keys in a given section.
* Each pointer in the returned char pointer-to-pointer is pointing to
* a string allocated in the dictionary; do not free or modify them.
*
* This function returns NULL in case of error.
*/
char ** iniparser_getseckeys(dictionary * d, char * s);
/**
* @brief Get the string associated to a key
* @param d Dictionary to search
* @param key Key string to look for
* @param def Default value to return if key not found.
* @return pointer to statically allocated character string
*
* This function queries a dictionary for a key. A key as read from an
* ini file is given as "section:key". If the key cannot be found,
* the pointer passed as 'def' is returned.
* The returned char pointer is pointing to a string allocated in
* the dictionary, do not free or modify it.
*/
char * iniparser_getstring(dictionary * d, const char * key, char * def);
/**
@brief Get the string associated to a key, convert to an int
@param d Dictionary to search
@param key Key string to look for
@param notfound Value to return in case of error
@return integer
This function queries a dictionary for a key. A key as read from an
ini file is given as "section:key". If the key cannot be found,
the notfound value is returned.
Supported values for integers include the usual C notation
so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
are supported. Examples:
- "42" -> 42
- "042" -> 34 (octal -> decimal)
- "0x42" -> 66 (hexa -> decimal)
Warning: the conversion may overflow in various ways. Conversion is
totally outsourced to strtol(), see the associated man page for overflow
handling.
Credits: Thanks to A. Becker for suggesting strtol()
*/
int iniparser_getint(dictionary * d, const char * key, int notfound);
/**
* @brief Get the string associated to a key, convert to a double
* @param d Dictionary to search
* @param key Key string to look for
* @param notfound Value to return in case of error
* @return double
*
* This function queries a dictionary for a key. A key as read from an
* ini file is given as "section:key". If the key cannot be found,
* the notfound value is returned.
*/
double iniparser_getdouble(dictionary * d, const char * key, double notfound);
/**
* @brief Get the string associated to a key, convert to a boolean
* @param d Dictionary to search
* @param key Key string to look for
* @param notfound Value to return in case of error
* @return integer
*
* This function queries a dictionary for a key. A key as read from an
* ini file is given as "section:key". If the key cannot be found,
* the notfound value is returned.
*
* A true boolean is found if one of the following is matched:
- A string starting with 'y'
- A string starting with 'Y'
- A string starting with 't'
- A string starting with 'T'
- A string starting with '1'
* A false boolean is found if one of the following is matched:
- A string starting with 'n'
- A string starting with 'N'
- A string starting with 'f'
- A string starting with 'F'
- A string starting with '0'
* The notfound value returned if no boolean is identified, does not
* necessarily have to be 0 or 1.
*/
int iniparser_getboolean(dictionary * d, const char * key, int notfound);
/**
* @brief Set an entry in a dictionary.
* @param ini Dictionary to modify.
* @param entry Entry to modify (entry name)
* @param val New value to associate to the entry.
* @return int 0 if Ok, -1 otherwise.
*
* If the given entry can be found in the dictionary, it is modified to
* contain the provided value. If it cannot be found, -1 is returned.
* It is Ok to set val to NULL.
*/
int iniparser_set(dictionary * ini, const char * entry, const char * val);
/**
* @brief Delete an entry in a dictionary
* @param ini Dictionary to modify
* @param entry Entry to delete (entry name)
* @return void
*
* If the given entry can be found, it is deleted from the dictionary.
*/
void iniparser_unset(dictionary * ini, const char * entry);
/**
* @brief Finds out if a given entry exists in a dictionary
* @param ini Dictionary to search
* @param entry Name of the entry to look for
* @return integer 1 if entry exists, 0 otherwise
*
* Finds out if a given entry exists in the dictionary. Since sections
* are stored as keys with NULL associated values, this is the only way
* of querying for the presence of sections in a dictionary.
*/
int iniparser_find_entry(dictionary * ini, const char * entry) ;
/**
* @brief Parse an ini file and return an allocated dictionary object
* @param ininame Name of the ini file to read.
* @return Pointer to newly allocated dictionary
*
* This is the parser for ini files. This function is called, providing
* the name of the file to be read. It returns a dictionary object that
* should not be accessed directly, but through accessor functions instead.
*
* The returned dictionary must be freed using iniparser_freedict().
*/
dictionary * iniparser_load(const char * ininame);
/**
* @brief Free all memory associated to an ini dictionary
* @param d Dictionary to free
* @return void
*
* Free all memory associated to an ini dictionary.
* It is mandatory to call this function before the dictionary object
* gets out of the current context.
*/
void iniparser_freedict(dictionary * d);
#ifdef __cplusplus
}
#endif
#endif