source: libcfa/src/parseconfig.hfa @ c166f4e

#pragma once

#include <math.trait.hfa>


// *********************************** initial declarations ***********************************


enum config_format {
        TABULAR_CONFIG
};

struct config_entry {
        const char * key;
        void * variable;
        bool (*parse)( const char *, void * );
        bool (*validate)( void * );
};

bool null_validator( void * ) { return true; }

static inline void ?{}( config_entry & this ) {}

forall(T & | { bool parse( const char *, T & ); })
static inline void ?{}( config_entry & this, const char * key, T & variable ) {
        this.key      = key;
        this.variable = (void *)&variable;
        this.parse    = (bool (*)(const char *, void *))(bool (*)(const char *, T &))parse;
        this.validate = null_validator;
}

forall(T & | { bool parse( const char *, T & ); })
static inline void ?{}( config_entry & this, const char * key, T & variable, bool (*validate)(T &) ) {
        this.key      = key;
        this.variable = (void *)&variable;
        this.parse    = (bool (*)(const char *, void *))(bool (*)(const char *, T &))parse;
        this.validate = (bool (*)(void *))(bool (*)(T &))validate;
}

forall(T &)
static inline void ?{}( config_entry & this, const char * key, T & variable, bool (*parse)(const char *, T &) ) {
        this.key      = key;
        this.variable = (void *)&variable;
        this.parse    = (bool (*)(const char *, void *))(bool (*)(const char *, T &))parse;
        this.validate = null_validator;
}

forall(T &)
static inline void ?{}( config_entry & this, const char * key, T & variable, bool (*parse)(const char *, T &), bool (*validate)(T &) ) {
        this.key      = key;
        this.variable = (void *)&variable;
        this.parse    = (bool (*)(const char *, void *))(bool (*)(const char *, T &))parse;
        this.validate = (bool (*)(void *))(bool (*)(T &))validate;
}


// *********************************** exceptions ***********************************


exception Parse_Failure {};

void ?{}( Parse_Failure & this );

exception Validation_Failure {};

void ?{}( Validation_Failure & this );


// *********************************** main code ***********************************


void parse_config( const char * config_file, config_entry entries[], size_t num_entries, config_format format );

bool parse( const char *, const char * & );
bool parse( const char *, int & );
bool parse( const char *, unsigned & );
bool parse( const char *, unsigned long & );
bool parse( const char *, unsigned long long & );
bool parse( const char *, float & );
bool parse( const char *, double & );


// *********************************** validation ***********************************


forall(T | Relational( T ))
bool is_nonnegative( T & );

forall(T | Relational( T ))
bool is_positive( T & );

forall(T | Relational( T ))
bool is_nonpositive( T & );

forall(T | Relational( T ))
bool is_negative( T & );


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