confuse.h(3)

NAME
confuse.h - A configuration file parser library.

SYNOPSIS

#include <stdio.h>
#include <stdarg.h>

  Data Structures
struct cfg_t
Data structure holding information about a 'section'.
union cfg_value_t
Data structure holding the value of a fundamental option value.
struct cfg_defvalue_t
Data structure holding the default value given by the initialization macros.
struct cfg_opt_t
Data structure holding information about an option.

  Defines
#define CFGF_NONE 0
Flags.
#define CFGF_MULTI 1 /**< option may be specified multiple times */
option may be specified multiple times
#define CFGF_LIST 2 /**< option is a list */
option is a list
#define CFGF_NOCASE 4 /**< configuration file is case insensitive */
configuration file is case insensitive
#define CFGF_TITLE 8 /**< option has a title (only applies to section) */
option has a title (only applies to section)
#define CFGF_NODEFAULT 16 /**< option has no default value */
option has no default value
#define CFG_SUCCESS 0
Return codes from cfg_parse().
#define CFG_STR(name, def, flags) __CFG_STR(name, def, flags, 0, 0)
Initialize a string option.
#define CFG_STR_LIST(name, def, flags) __CFG_STR_LIST(name, def, flags, 0, 0)
Initialize a string list option.
#define CFG_STR_CB(name, def, flags, cb) __CFG_STR(name, def, flags, 0, cb)
Initialize a string option with a value parsing callback.
#define CFG_STR_LIST_CB(name, def, flags, cb) __CFG_STR_LIST(name, def, flags, 0, cb)
Initialize a string list option with a value parsing callback.
#define CFG_SIMPLE_STR(name, svalue) __CFG_STR(name, 0, CFGF_NONE, svalue, 0)
Initialize a 'simple' string option.
#define CFG_INT(name, def, flags) __CFG_INT(name, def, flags, 0, 0)
Initialize an integer option.
#define CFG_INT_LIST(name, def, flags) __CFG_INT_LIST(name, def, flags, 0, 0)
Initialize an integer list option.
#define CFG_INT_CB(name, def, flags, cb) __CFG_INT(name, def, flags, 0, cb)
Initialize an integer option with a value parsing callback.
#define CFG_INT_LIST_CB(name, def, flags, cb) __CFG_INT_LIST(name, def, flags, 0, cb)
Initialize an integer list option with a value parsing callback.
#define CFG_SIMPLE_INT(name, svalue) __CFG_INT(name, 0, CFGF_NONE, svalue, 0)
Initialize a 'simple' integer option (see documentation for CFG_SIMPLE_STR for more information).
#define CFG_FLOAT(name, def, flags) __CFG_FLOAT(name, def, flags, 0, 0)
Initialize a floating point option.
#define CFG_FLOAT_LIST(name, def, flags) __CFG_FLOAT_LIST(name, def, flags, 0, 0)
Initialize a floating point list option.
#define CFG_FLOAT_CB(name, def, flags, cb) __CFG_FLOAT(name, def, flags, 0, cb)
Initialize a floating point option with a value parsing callback.
#define CFG_FLOAT_LIST_CB(name, def, flags, cb) __CFG_FLOAT_LIST(name, def, flags, 0, cb)
Initialize a floating point list option with a value parsing callback.
#define CFG_SIMPLE_FLOAT(name, svalue) __CFG_FLOAT(name, 0, CFGF_NONE, svalue, 0)
Initialize a 'simple' floating point option (see documentation for CFG_SIMPLE_STR for more information).
#define CFG_BOOL(name, def, flags) __CFG_BOOL(name, def, flags, 0, 0)
Initialize a boolean option.
#define CFG_BOOL_LIST(name, def, flags) __CFG_BOOL_LIST(name, def, flags, 0, 0)
Initialize a boolean list option.
#define CFG_BOOL_CB(name, def, flags, cb) __CFG_BOOL(name, def, flags, 0, cb)
Initialize a boolean option with a value parsing callback.
#define CFG_BOOL_LIST_CB(name, def, flags, cb) __CFG_BOOL_LIST(name, def, flags, 0, cb)
Initialize a boolean list option with a value parsing callback.
#define CFG_SIMPLE_BOOL(name, svalue) __CFG_BOOL(name, cfg_false, CFGF_NONE, svalue, 0)
Initialize a 'simple' boolean option (see documentation for CFG_SIMPLE_STR for more information).
#define CFG_SEC(name, opts, flags) {name,CFGT_SEC,0,0,flags,opts,{0,0,cfg_false,0,0},0,0,0,0,0,0}
Initialize a section.
#define CFG_FUNC(name, func) {name,CFGT_FUNC,0,0,CFGF_NONE,0,{0,0,cfg_false,0,0},func,0,0,0,0,0}
Initialize a function.
#define CFG_PTR_CB(name, def, flags, parsecb, freecb) __CFG_PTR(name, def, flags, 0, parsecb, freecb)
Initialize a user-defined option.
#define CFG_PTR_LIST_CB(name, def, flags, parsecb, freecb) __CFG_PTR(name, def, flags | CFGF_LIST, 0, parsecb, freecb)
Initialize a list of user-defined options.
#define CFG_END() {0,CFGT_NONE,0,0,CFGF_NONE,0,{0,0,cfg_false,0,0},0,0,0,0,0,0}
Terminate list of options.

  Typedefs
typedef int(* cfg_func_t )(cfg_t *cfg, cfg_opt_t *opt, int argc, const char **argv)
Function prototype used by CFGT_FUNC options.
typedef void(* cfg_print_func_t )(cfg_opt_t *opt, unsigned int index, FILE *fp)
Function prototype used by the cfg_print_ functions.
typedef int(* cfg_callback_t )(cfg_t *cfg, cfg_opt_t *opt, const char *value, void *result)
Value parsing callback prototype.
typedef int(* cfg_validate_callback_t )(cfg_t *cfg, cfg_opt_t *opt)
Validating callback prototype.
typedef void(* cfg_free_func_t )(void *value)
User-defined memory release function for CFG_PTR values.
typedef void(* cfg_errfunc_t )(cfg_t *cfg, const char *fmt, va_list ap)
Error reporting function.

  Enumerations
enum cfg_type_t { , CFGT_INT, CFGT_FLOAT, CFGT_STR, CFGT_BOOL, CFGT_SEC, CFGT_FUNC, CFGT_PTR }
Fundamental option types.
enum cfg_bool_t
Boolean values.

  Functions
DLLIMPORT cfg_t *__export cfg_init (cfg_opt_t *opts, cfg_flag_t flags)
Create and initialize a cfg_t structure.
DLLIMPORT int __export cfg_parse (cfg_t *cfg, const char *filename)
Parse a configuration file.
DLLIMPORT int __export cfg_parse_fp (cfg_t *cfg, FILE *fp)
Same as cfg_parse() above, but takes an already opened file as argument.
DLLIMPORT int __export cfg_parse_buf (cfg_t *cfg, const char *buf)
Same as cfg_parse() above, but takes a character buffer as argument.
DLLIMPORT void __export cfg_free_value (cfg_opt_t *opt)
Free the memory allocated for the values of a given option.
DLLIMPORT void __export cfg_free (cfg_t *cfg)
Free a cfg_t context.
DLLIMPORT cfg_errfunc_t __export cfg_set_error_function (cfg_t *cfg, cfg_errfunc_t errfunc)
Install a user-defined error reporting function.
DLLIMPORT void __export cfg_error (cfg_t *cfg, const char *fmt,...)
Show a parser error.
DLLIMPORT signed long cfg_opt_getnint (cfg_opt_t *opt, unsigned int index)
Returns the value of an integer option, given a cfg_opt_t pointer.
DLLIMPORT long int __export cfg_getnint (cfg_t *cfg, const char *name, unsigned int index)
Indexed version of cfg_getint(), used for lists.
DLLIMPORT long int __export cfg_getint (cfg_t *cfg, const char *name)
Returns the value of an integer option.
DLLIMPORT double cfg_opt_getnfloat (cfg_opt_t *opt, unsigned int index)
Returns the value of a floating point option, given a cfg_opt_t pointer.
DLLIMPORT double __export cfg_getnfloat (cfg_t *cfg, const char *name, unsigned int index)
Indexed version of cfg_getfloat(), used for lists.
DLLIMPORT double __export cfg_getfloat (cfg_t *cfg, const char *name)
Returns the value of a floating point option.
DLLIMPORT char * cfg_opt_getnstr (cfg_opt_t *opt, unsigned int index)
Returns the value of a string option, given a cfg_opt_t pointer.
DLLIMPORT char *__export cfg_getnstr (cfg_t *cfg, const char *name, unsigned int index)
Indexed version of cfg_getstr(), used for lists.
DLLIMPORT char *__export cfg_getstr (cfg_t *cfg, const char *name)
Returns the value of a string option.
DLLIMPORT cfg_bool_t cfg_opt_getnbool (cfg_opt_t *opt, unsigned int index)
Returns the value of a boolean option, given a cfg_opt_t pointer.
DLLIMPORT cfg_bool_t __export cfg_getnbool (cfg_t *cfg, const char *name, unsigned int index)
Indexed version of cfg_getbool(), used for lists.
DLLIMPORT cfg_bool_t __export cfg_getbool (cfg_t *cfg, const char *name)
Returns the value of a boolean option.
DLLIMPORT void * cfg_getptr (cfg_t *cfg, const char *name)
Returns the value of a user-defined option (void pointer).
DLLIMPORT cfg_t * cfg_opt_getnsec (cfg_opt_t *opt, unsigned int index)
Returns the value of a section option, given a cfg_opt_t pointer.
DLLIMPORT cfg_t *__export cfg_getnsec (cfg_t *cfg, const char *name, unsigned int index)
Indexed version of cfg_getsec(), used for sections with the CFGF_MULTI flag set.
DLLIMPORT cfg_t * cfg_opt_gettsec (cfg_opt_t *opt, const char *title)
Returns the value of a section option, given a cfg_opt_t pointer and the title.
DLLIMPORT cfg_t *__export cfg_gettsec (cfg_t *cfg, const char *name, const char *title)
Return a section given the title, used for section with the CFGF_TITLE flag set.
DLLIMPORT cfg_t *__export cfg_getsec (cfg_t *cfg, const char *name)
Returns the value of a section option.
DLLIMPORT unsigned int cfg_opt_size (cfg_opt_t *opt)
Return the number of values this option has.
DLLIMPORT unsigned int __export cfg_size (cfg_t *cfg, const char *name)
Return the number of values this option has.
DLLIMPORT const char *__export cfg_title (cfg_t *cfg)
Return the title of a section.
DLLIMPORT const char * cfg_name (cfg_t *cfg)
Return the name of a section.
DLLIMPORT const char * cfg_opt_name (cfg_opt_t *opt)
Return the name of an option.
DLLIMPORT int __export cfg_include (cfg_t *cfg, cfg_opt_t *opt, int argc, const char **argv)
Predefined include-function.
DLLIMPORT char *__export cfg_tilde_expand (const char *filename)
Does tilde expansion (~ -> $HOME) on the filename.
DLLIMPORT int __export cfg_parse_boolean (const char *s)
Parse a boolean option string.
DLLIMPORT cfg_opt_t *__export cfg_getopt (cfg_t *cfg, const char *name)
Return an option given it's name.
DLLIMPORT void __export cfg_opt_setnint (cfg_opt_t *opt, long int value, unsigned int index)
Set a value of an integer option.
DLLIMPORT void __export cfg_setint (cfg_t *cfg, const char *name, long int value)
Set the value of an integer option given its name.
DLLIMPORT void __export cfg_setnint (cfg_t *cfg, const char *name, long int value, unsigned int index)
Set a value of an integer option given its name and index.
DLLIMPORT void __export cfg_opt_setnfloat (cfg_opt_t *opt, double value, unsigned int index)
Set a value of a floating point option.
DLLIMPORT void __export cfg_setfloat (cfg_t *cfg, const char *name, double value)
Set the value of a floating point option given its name.
DLLIMPORT void __export cfg_setnfloat (cfg_t *cfg, const char *name, double value, unsigned int index)
Set a value of a floating point option given its name and index.
DLLIMPORT void __export cfg_opt_setnbool (cfg_opt_t *opt, cfg_bool_t value, unsigned int index)
Set a value of a boolean option.
DLLIMPORT void __export cfg_setbool (cfg_t *cfg, const char *name, cfg_bool_t value)
Set the value of a boolean option given its name.
DLLIMPORT void __export cfg_setnbool (cfg_t *cfg, const char *name, cfg_bool_t value, unsigned int index)
Set a value of a boolean option given its name and index.
DLLIMPORT void __export cfg_opt_setnstr (cfg_opt_t *opt, const char *value, unsigned int index)
Set a value of a string option.
DLLIMPORT void __export cfg_setstr (cfg_t *cfg, const char *name, const char *value)
Set the value of a string option given its name.
DLLIMPORT void __export cfg_setnstr (cfg_t *cfg, const char *name, const char *value, unsigned int index)
Set a value of a boolean option given its name and index.
DLLIMPORT void __export cfg_setlist (cfg_t *cfg, const char *name, unsigned int nvalues,...)
Set values for a list option.
DLLIMPORT void __export cfg_addlist (cfg_t *cfg, const char *name, unsigned int nvalues,...)
Add values for a list option.
DLLIMPORT void cfg_opt_nprint_var (cfg_opt_t *opt, unsigned int index, FILE *fp)
Default value print function.
DLLIMPORT void cfg_opt_print_indent (cfg_opt_t *opt, FILE *fp, int indent)
Print an option and its value to a file.
DLLIMPORT void cfg_opt_print (cfg_opt_t *opt, FILE *fp)
Print an option and its value to a file.
DLLIMPORT void cfg_print_indent (cfg_t *cfg, FILE *fp, int indent)
Print the options and values to a file.
DLLIMPORT void cfg_print (cfg_t *cfg, FILE *fp)
Print the options and values to a file.
DLLIMPORT cfg_print_func_t cfg_opt_set_print_func (cfg_opt_t *opt, cfg_print_func_t pf)
Set a print callback function for an option.
DLLIMPORT cfg_print_func_t cfg_set_print_func (cfg_t *cfg, const char *name, cfg_print_func_t pf)
Set a print callback function for an option given its name.
DLLIMPORT cfg_validate_callback_t cfg_set_validate_func (cfg_t *cfg, const char *name, cfg_validate_callback_t vf)
Register a validating callback function for an option.

Detailed Description

A configuration file parser library.

Define Documentation

  #define CFG_END() {0,CFGT_NONE,0,0,CFGF_NONE,0,{0,0,cfg_false,0,0},0,0,0,0,0,0}

Terminate list of options. This must be the last initializer in the option list.

Examples:
reread.c, and simple.c.

  #define CFG_FUNC(name, func) {name,CFGT_FUNC,0,0,CFGF_NONE,0,{0,0,cfg_false,0,0},func,0,0,0,0,0}

Initialize a function. Parameters:
    name The name of the option
    func The callback function.

See also:
    cfg_func_t

  #define CFG_PTR_CB(name, def, flags, parsecb, freecb) __CFG_PTR(name, def, flags, 0, parsecb, freecb)

Initialize a user-defined option. CFG_PTR options can only be used together with a value parsing callback.

Parameters:
    name The name of the option
    def Default value
    flags Flags
    parsecb Value parsing callback
    freecb Memory release function

See also:
    cfg_callback_t, cfg_free_func_t

  #define CFG_SEC(name, opts, flags) {name,CFGT_SEC,0,0,flags,opts,{0,0,cfg_false,0,0},0,0,0,0,0,0}

Initialize a section. Parameters:
    name The name of the option
    opts Array of options that are valid within this section
    flags Flags, specify CFGF_MULTI if it should be possible to have multiples of the same section, and CFGF_TITLE if the section(s) must have a title (which can be used in the cfg_gettsec() function)

Examples:
reread.c.

  #define CFG_SIMPLE_STR(name, svalue) __CFG_STR(name, 0, CFGF_NONE, svalue, 0)

Initialize a 'simple' string option. 'Simple' options (in lack of a better expression) does not support lists of values or multiple sections. LibConfuse will store the value of a simple option in the user-defined location specified by the value parameter in the initializer. Simple options are not stored in the cfg_t context, only a pointer. Sections can not be initialized as a 'simple' option.

As of version 2.2, libConfuse can now return the values of simple options with the cfg_get functions. This allows using the new cfg_print function with simple options.

libConfuse doesn't support handling default values for 'simple' options. They are assumed to be set by the calling application before cfg_parse is called.

Parameters:
    name name of the option
    svalue pointer to a character pointer (a char **). This value must be initalized either to NULL or to a malloc()'ed string. You can't use

     char *user = 'joe';
     ...
     cfg_opt_t opts[] = {
         CFG_SIMPLE_STR('user', &user),
     ...

     since libConfuse will try to free the static string 'joe' (which is an error) when a 'user' option is found. Rather, use the following code snippet:

     char *user = strdup('joe');
     ...
     cfg_opt_t opts[] = {
          CFG_SIMPLE_STR('user', &user),
     ...

     Alternatively, the default value can be set after the opts struct is defined, as in:

     char *user = 0;
     ...
     cfg_opt_t opts[] = {
          CFG_SIMPLE_STR('user', &user),
     ...
     user = strdup('joe');
     cfg = cfg_init(opts, 0);
     cfg_parse(cfg, filename);

Examples:
simple.c.

Typedef Documentation

  typedef int(* cfg_callback_t)(cfg_t *cfg, cfg_opt_t *opt, const char *value, void *result)

Value parsing callback prototype. This is a callback function (different from the one registered with the CFG_FUNC initializer) used to parse a value. This can be used to override the internal parsing of a value.

Suppose you want an integer option that only can have certain values, for example 1, 2 and 3, and these should be written in the configuration file as 'yes', 'no' and 'maybe'. The callback function would be called with the found value ('yes', 'no' or 'maybe') as a string, and the result should be stored in the result parameter.

Parameters:
    cfg The configuration file context.
    opt The option.
    value The value found in the configuration file.
    result Pointer to storage for the result, cast to a void pointer.

Returns:
    On success, 0 should be returned. All other values indicates an error, and the parsing is aborted. The callback function should notify the error itself, for example by calling cfg_error().

  typedef void(* cfg_free_func_t)(void *value)

User-defined memory release function for CFG_PTR values. This callback is used to free memory allocated in a value parsing callback function. Especially useful for CFG_PTR options, since libConfuse will not itself release such values. If the values are simply allocated with a malloc(3), one can use the standard free(3) function here.

  typedef int(* cfg_func_t)(cfg_t *cfg, cfg_opt_t *opt, int argc, const char **argv)

Function prototype used by CFGT_FUNC options. This is a callback function, registered with the CFG_FUNC initializer. Each time libConfuse finds a function, the registered callback function is called (parameters are passed as strings, any conversion to other types should be made in the callback function). libConfuse does not support any storage of the data found; these are passed as parameters to the callback, and it's the responsibility of the callback function to do whatever it should do with the data.

Parameters:
    cfg The configuration file context.
    opt The option.
    argc Number of arguments passed. The callback function is responsible for checking that the correct number of arguments are passed.
    argv Arguments as an array of character strings.

Returns:
    On success, 0 should be returned. All other values indicates an error, and the parsing is aborted. The callback function should notify the error itself, for example by calling cfg_error().

See also:
    CFG_FUNC

  typedef void(* cfg_print_func_t)(cfg_opt_t *opt, unsigned int index, FILE *fp)

Function prototype used by the cfg_print_ functions. This callback function is used to print option values. For options with a value parsing callback, this is often required, especially if a string is mapped to an integer by the callback. This print callback must then map the integer back to the appropriate string.

Except for functions, the print callback function should only print the value of the option, not the name and the equal sign (that is handled by the cfg_opt_print function). For function options however, the name and the parenthesis must be printed by this function. The value to print can be accessed with the cfg_opt_get functions.

Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index Index of the value to get. Zero based.
    fp File stream to print to, use stdout to print to the screen.

See also:
    cfg_print, cfg_set_print_func

  typedef int(* cfg_validate_callback_t)(cfg_t *cfg, cfg_opt_t *opt)

Validating callback prototype. This callback function is called after an option has been parsed and set. The function is called for both fundamental values (strings, integers etc) as well as lists and sections. This can for example be used to validate that all required options in a section has been set to sane values.

Returns:
    On success, 0 should be returned. All other values indicates an error, and the parsing is aborted. The callback function should notify the error itself, for example by calling cfg_error().

See also:
    cfg_set_validate_func

Enumeration Type Documentation

  enum cfg_type_t

Fundamental option types.

Enumeration values:

CFGT_INT
    integer

CFGT_FLOAT
    floating point number

CFGT_STR
    string

CFGT_BOOL
    boolean value

CFGT_SEC
    section

CFGT_FUNC
    function

CFGT_PTR
    pointer to user-defined value

Function Documentation

  DLLIMPORT void __export cfg_addlist (cfg_t * cfg, const char * name, unsigned int nvalues, ...)

Add values for a list option. The new values are appended to any current values in the list.

Parameters:
    cfg The configuration file context.
    name The name of the option.
    nvalues Number of values to add.
    ... The values to add, the type must match the type of the option and the number of values must be equal to the nvalues parameter.

  DLLIMPORT void __export cfg_error (cfg_t * cfg, const char * fmt, ...)

Show a parser error. Any user-defined error reporting function is called.

See also:
    cfg_set_error_function

  DLLIMPORT void __export cfg_free (cfg_t * cfg)

Free a cfg_t context. All memory allocated by the cfg_t context structure are freed, and can't be used in any further cfg_* calls.

Examples:
reread.c, and simple.c.

  DLLIMPORT void __export cfg_free_value (cfg_opt_t * opt)

Free the memory allocated for the values of a given option. Only the values are freed, not the option itself (it is freed by cfg_free()).

See also:
    cfg_free()

  DLLIMPORT cfg_bool_t __export cfg_getbool (cfg_t * cfg, const char * name)

Returns the value of a boolean option. Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    The requested value is returned. If the option was not set in the configuration file, the default value given in the corresponding cfg_opt_t structure is returned. It is an error to try to get an option that isn't declared.

  DLLIMPORT double __export cfg_getfloat (cfg_t * cfg, const char * name)

Returns the value of a floating point option. Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    The requested value is returned. If the option was not set in the configuration file, the default value given in the corresponding cfg_opt_t structure is returned. It is an error to try to get an option that isn't declared.

  DLLIMPORT long int __export cfg_getint (cfg_t * cfg, const char * name)

Returns the value of an integer option. This is the same as calling cfg_getnint with index 0.

Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    The requested value is returned. If the option was not set in the configuration file, the default value given in the corresponding cfg_opt_t structure is returned. It is an error to try to get an option that isn't declared.

Examples:
reread.c.

  DLLIMPORT cfg_bool_t __export cfg_getnbool (cfg_t * cfg, const char * name, unsigned int index)

Indexed version of cfg_getbool(), used for lists. Parameters:
    cfg The configuration file context.
    name The name of the option.
    index Index of the value to get. Zero based.

See also:
    cfg_getbool

  DLLIMPORT double __export cfg_getnfloat (cfg_t * cfg, const char * name, unsigned int index)

Indexed version of cfg_getfloat(), used for lists. Parameters:
    cfg The configuration file context.
    name The name of the option.
    index Index of the value to get. Zero based.

See also:
    cfg_getfloat

  DLLIMPORT long int __export cfg_getnint (cfg_t * cfg, const char * name, unsigned int index)

Indexed version of cfg_getint(), used for lists. Parameters:
    cfg The configuration file context.
    name The name of the option.
    index Index of the value to get. Zero based.

See also:
    cfg_getint

  DLLIMPORT cfg_t* __export cfg_getnsec (cfg_t * cfg, const char * name, unsigned int index)

Indexed version of cfg_getsec(), used for sections with the CFGF_MULTI flag set. Parameters:
    cfg The configuration file context.
    name The name of the option.
    index Index of the section to get. Zero based.

See also:
    cfg_getsec

Examples:
reread.c.

  DLLIMPORT char* __export cfg_getnstr (cfg_t * cfg, const char * name, unsigned int index)

Indexed version of cfg_getstr(), used for lists. Parameters:
    cfg The configuration file context.
    name The name of the option.
    index Index of the value to get. Zero based.

See also:
    cfg_getstr

  DLLIMPORT cfg_opt_t* __export cfg_getopt (cfg_t * cfg, const char * name)

Return an option given it's name. Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    Returns a pointer to the option. If the option isn't declared, libConfuse will print an error message and return 0.

  DLLIMPORT void* cfg_getptr (cfg_t * cfg, const char * name)

Returns the value of a user-defined option (void pointer). Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    The requested value is returned. If the option was not set in the configuration file, the default value given in the corresponding cfg_opt_t structure is returned. It is an error to try to get an option that isn't declared.

  DLLIMPORT cfg_t* __export cfg_getsec (cfg_t * cfg, const char * name)

Returns the value of a section option. The returned value is another cfg_t structure that can be used in following calls to cfg_getint, cfg_getstr or other get-functions.

Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    The requested section is returned. If no section is found with that name, 0 is returned. There can only be default values for section without the CFGF_MULTI flag set. It is an error to try to get a section that isn't declared.

  DLLIMPORT char* __export cfg_getstr (cfg_t * cfg, const char * name)

Returns the value of a string option. Parameters:
    cfg The configuration file context.
    name The name of the option.

Returns:
    The requested value is returned. If the option was not set in the configuration file, the default value given in the corresponding cfg_opt_t structure is returned. It is an error to try to get an option that isn't declared.

Examples:
reread.c.

  DLLIMPORT cfg_t* __export cfg_gettsec (cfg_t * cfg, const char * name, const char * title)

Return a section given the title, used for section with the CFGF_TITLE flag set. Parameters:
    cfg The configuration file context.
    name The name of the option.
    title The title of this section. The CFGF_TITLE flag must have been set for this option.

See also:
    cfg_getsec

  DLLIMPORT int __export cfg_include (cfg_t * cfg, cfg_opt_t * opt, int argc, const char ** argv)

Predefined include-function. This function can be used in the options passed to cfg_init() to specify a function for including other configuration files in the parsing. For example: CFG_FUNC('include', &cfg_include)

  DLLIMPORT cfg_t* __export cfg_init (cfg_opt_t * opts, cfg_flag_t flags)

Create and initialize a cfg_t structure. This should be the first function called when setting up the parsing of a configuration file. The options passed in the first parameter is initialized using the CFG_* initializers. The last option in the option array must be CFG_END(), unless you like segmentation faults.

The options must no longer be defined in the same scope as where the cfg_xxx functions are used (since version 2.3).

Parameters:
    opts An arrary of options
    flags One or more flags (bitwise or'ed together). Currently only CFGF_NOCASE is available. Use 0 if no flags are needed.

Returns:
    A configuration context structure. This pointer is passed to almost all other functions as the first parameter.

Examples:
reread.c, and simple.c.

  DLLIMPORT const char* cfg_name (cfg_t * cfg)

Return the name of a section. Parameters:
    cfg The configuration file context.

Returns:
    Returns the title, or 0 if there is no title. This string should not be modified.

  DLLIMPORT cfg_bool_t cfg_opt_getnbool (cfg_opt_t * opt, unsigned int index)

Returns the value of a boolean option, given a cfg_opt_t pointer. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index Index of the value to get. Zero based.

See also:
    cfg_getnbool

  DLLIMPORT double cfg_opt_getnfloat (cfg_opt_t * opt, unsigned int index)

Returns the value of a floating point option, given a cfg_opt_t pointer. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index Index of the value to get. Zero based.

See also:
    cfg_getnfloat

  DLLIMPORT signed long cfg_opt_getnint (cfg_opt_t * opt, unsigned int index)

Returns the value of an integer option, given a cfg_opt_t pointer. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index Index of the value to get. Zero based.

See also:
    cfg_getnint

  DLLIMPORT cfg_t* cfg_opt_getnsec (cfg_opt_t * opt, unsigned int index)

Returns the value of a section option, given a cfg_opt_t pointer. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index Index of the value to get. Zero based.

See also:
    cfg_getnsec

  DLLIMPORT char* cfg_opt_getnstr (cfg_opt_t * opt, unsigned int index)

Returns the value of a string option, given a cfg_opt_t pointer. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index Index of the value to get. Zero based.

See also:
    cfg_getnstr

  DLLIMPORT cfg_t* cfg_opt_gettsec (cfg_opt_t * opt, const char * title)

Returns the value of a section option, given a cfg_opt_t pointer and the title. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    title The title of this section. The CFGF_TITLE flag must have been set for this option.

See also:
    cfg_gettsec

  DLLIMPORT const char* cfg_opt_name (cfg_opt_t * opt)

Return the name of an option. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())

Returns:
    Returns the title, or 0 if there is no title. This string should not be modified.

  DLLIMPORT void cfg_opt_nprint_var (cfg_opt_t * opt, unsigned int index, FILE * fp)

Default value print function. Print only the value of a given option. Does not handle sections or functions. Use cfg_opt_print to print the whole assignment ('option = value'), or cfg_print to print the whole config file.

Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    index The index in the option value array that should be printed
    fp File stream to print to.

See also:
    cfg_print, cfg_opt_print

  DLLIMPORT void cfg_opt_print (cfg_opt_t * opt, FILE * fp)

Print an option and its value to a file. If a print callback function is specified for the option, it is used instead of cfg_opt_nprint_var.

Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    fp File stream to print to.

See also:
    cfg_print_func_t

  DLLIMPORT void cfg_opt_print_indent (cfg_opt_t * opt, FILE * fp, int indent)

Print an option and its value to a file. Same as cfg_opt_print, but with the indentation level specified.

See also:
    cfg_opt_print

  DLLIMPORT cfg_print_func_t cfg_opt_set_print_func (cfg_opt_t * opt, cfg_print_func_t pf)

Set a print callback function for an option. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    pf The print function callback.

See also:
    cfg_print_func_t

  DLLIMPORT void __export cfg_opt_setnbool (cfg_opt_t * opt, cfg_bool_t value, unsigned int index)

Set a value of a boolean option. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    value The value to set.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_opt_setnfloat (cfg_opt_t * opt, double value, unsigned int index)

Set a value of a floating point option. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    value The value to set.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_opt_setnint (cfg_opt_t * opt, long int value, unsigned int index)

Set a value of an integer option. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    value The value to set.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_opt_setnstr (cfg_opt_t * opt, const char * value, unsigned int index)

Set a value of a string option. Parameters:
    opt The option structure (eg, as returned from cfg_getopt())
    value The value to set. Memory for the string is allocated and the value is copied. Any previous string value is freed.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT unsigned int cfg_opt_size (cfg_opt_t * opt)

Return the number of values this option has. If no default value is given for the option and no value was found in the config file, 0 will be returned (ie, the option value is not set at all).

Parameters:
    opt The option structure (eg, as returned from cfg_getopt())

  DLLIMPORT int __export cfg_parse (cfg_t * cfg, const char * filename)

Parse a configuration file. Tilde expansion is performed on the filename before it is opened. After a configuration file has been initialized (with cfg_init()) and parsed (with cfg_parse()), the values can be read with the cfg_getXXX functions.

Parameters:
    cfg The configuration file context as returned from cfg_init().
    filename The name of the file to parse.

Returns:
    On success, CFG_SUCCESS is returned. If the file couldn't be opened for reading, CFG_FILE_ERROR is returned. On all other errors, CFG_PARSE_ERROR is returned and cfg_error() was called with a descriptive error message.

Examples:
reread.c, and simple.c.

  DLLIMPORT int __export cfg_parse_boolean (const char * s)

Parse a boolean option string. Accepted 'true' values are 'true', 'on' and 'yes', and accepted 'false' values are 'false', 'off' and 'no'.

Returns:
    Returns 1 or 0 (true/false) if the string was parsed correctly, or -1 if an error occurred.

  DLLIMPORT int __export cfg_parse_buf (cfg_t * cfg, const char * buf)

Same as cfg_parse() above, but takes a character buffer as argument. Parameters:
    cfg The configuration file context as returned from cfg_init().
    buf A zero-terminated string with configuration directives.

See also:
    cfg_parse()

Examples:
reread.c.

  DLLIMPORT int __export cfg_parse_fp (cfg_t * cfg, FILE * fp)

Same as cfg_parse() above, but takes an already opened file as argument. Reading begins at the current position. After parsing, the position is not reset. The caller is responsible for closing the file.

Parameters:
    cfg The configuration file context as returned from cfg_init().
    fp An open file stream.

See also:
    cfg_parse()

  DLLIMPORT void cfg_print (cfg_t * cfg, FILE * fp)

Print the options and values to a file. Note that options in any included file are expanded and printed directly to the file. Option values given with environment variables in the parsed input are also printed expanded. This means that if you parse a configuration file you can't expect that the output from this function is identical to the initial file.

Parameters:
    cfg The configuration file context.
    fp File stream to print to, use stdout to print to the screen.

See also:
    cfg_print_func_t, cfg_set_print_func

Examples:
simple.c.

  DLLIMPORT void cfg_print_indent (cfg_t * cfg, FILE * fp, int indent)

Print the options and values to a file. Same as cfg_print, but with the indentation level specified.

See also:
    cfg_print

  DLLIMPORT cfg_errfunc_t __export cfg_set_error_function (cfg_t * cfg, cfg_errfunc_t errfunc)

Install a user-defined error reporting function. Returns:
    The old error reporting function is returned.

  DLLIMPORT cfg_print_func_t cfg_set_print_func (cfg_t * cfg, const char * name, cfg_print_func_t pf)

Set a print callback function for an option given its name. Parameters:
    cfg The configuration file context.
    name The name of the option.
    pf The print callback function.

See also:
    cfg_print_func_t

  DLLIMPORT cfg_validate_callback_t cfg_set_validate_func (cfg_t * cfg, const char * name, cfg_validate_callback_t vf)

Register a validating callback function for an option. Parameters:
    cfg The configuration file context.
    name The name of the option.
    vf The validating callback function.

See also:
    cfg_validate_callback_t

  DLLIMPORT void __export cfg_setbool (cfg_t * cfg, const char * name, cfg_bool_t value)

Set the value of a boolean option given its name. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set. If the option is a list (the CFGF_LIST flag is set), only the first value (with index 0) is set.

  DLLIMPORT void __export cfg_setfloat (cfg_t * cfg, const char * name, double value)

Set the value of a floating point option given its name. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set. If the option is a list (the CFGF_LIST flag is set), only the first value (with index 0) is set.

  DLLIMPORT void __export cfg_setint (cfg_t * cfg, const char * name, long int value)

Set the value of an integer option given its name. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set. If the option is a list (the CFGF_LIST flag is set), only the first value (with index 0) is set.

  DLLIMPORT void __export cfg_setlist (cfg_t * cfg, const char * name, unsigned int nvalues, ...)

Set values for a list option. All existing values are replaced with the new ones.

Parameters:
    cfg The configuration file context.
    name The name of the option.
    nvalues Number of values to set.
    ... The values to set, the type must match the type of the option and the number of values must be equal to the nvalues parameter.

  DLLIMPORT void __export cfg_setnbool (cfg_t * cfg, const char * name, cfg_bool_t value, unsigned int index)

Set a value of a boolean option given its name and index. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_setnfloat (cfg_t * cfg, const char * name, double value, unsigned int index)

Set a value of a floating point option given its name and index. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_setnint (cfg_t * cfg, const char * name, long int value, unsigned int index)

Set a value of an integer option given its name and index. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_setnstr (cfg_t * cfg, const char * name, const char * value, unsigned int index)

Set a value of a boolean option given its name and index. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set. Memory for the string is allocated and the value is copied. Any privious string value is freed.
    index The index in the option value array that should be modified. It is an error to set values with indices larger than 0 for options without the CFGF_LIST flag set.

  DLLIMPORT void __export cfg_setstr (cfg_t * cfg, const char * name, const char * value)

Set the value of a string option given its name. Parameters:
    cfg The configuration file context.
    name The name of the option.
    value The value to set. Memory for the string is allocated and the value is copied. Any previous string value is freed. If the option is a list (the CFGF_LIST flag is set), only the first value (with index 0) is set.

Examples:
simple.c.

  DLLIMPORT unsigned int __export cfg_size (cfg_t * cfg, const char * name)

Return the number of values this option has. If no default value is given for the option and no value was found in the config file, 0 will be returned (ie, the option value is not set at all).

Note that there is no way to *not* specify a default value for integers, floats and booleans. Ie, they always have default values (since 0 or NULL is a valid integer/float/boolean value). Only strings and lists may have no default value.

Parameters:
    cfg The configuration file context.
    name The name of the option.

Examples:
reread.c.

  DLLIMPORT char* __export cfg_tilde_expand (const char * filename)

Does tilde expansion (~ -> $HOME) on the filename. Returns:
    The expanded filename is returned. If a ~user was not found, the original filename is returned. In any case, a dynamically allocated string is returned, which should be free()'d by the caller.

  DLLIMPORT const char* __export cfg_title (cfg_t * cfg)

Return the title of a section. Parameters:
    cfg The configuration file context.

Returns:
    Returns the title, or 0 if there is no title. This string should not be modified.

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