read_ini.cc

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/*!
 *
 * Copyright (C) 2015 Technical University of Liberec.  All rights reserved.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation. (http://www.gnu.org/licenses/gpl-3.0.en.html)
 * 
 * This program 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 General Public License for more details.
 *
 * 
 * @file    read_ini.cc
 * @ingroup io
 * @brief   OPTIONS RUTINES - get program parameters, reading from options/ini file
 * @section DESCRIPTION
 *
 *   Functions OptGet* are implemented through OptGetStr - only one interface routine for
 *   various implementation the parameter default is always char *, which can be NULL in the case that
 *   explicit value is necessary and program should produce an error if corresponding
 *   parameter is not given.
 *
 *   Current implementation is based on SimpleINI C++ library.
 *
 */

#include <strings.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "system/system.hh"
#include "system/xio.h"
#include "io/read_ini.h"

#include <boost/tokenizer.hpp>
#include "boost/lexical_cast.hpp"
#include <boost/algorithm/string.hpp>

static struct Read_ini *read_ini = NULL;

#define FOR_INI_ITEMS(i)     for((i)=read_ini->ini_item;(i)!=NULL;(i)=(i)->next)

static void make_ini_item_list(const char *fname);
static char *section_test(char *section);
static char *strip_spaces(char *string);
static struct Ini_item *new_item(struct Ini_item *prev,char *section, char *key, char *value);

//#define   xOptGetStr(s,k) (ini.GetValue(s,k,NULL))




/*!
 * @brief      STRTOK WITH ERROR HANDLING and whitespace delimiters
 * @param[in]  s        strtok string pointer
 * @param[in]  position requested position of the token
 * @return              strtok return
 */
char *xstrtok(char *s, int position)
{
    char *rc;
    const char * const whitespace_delim=" \t\r\n";

    rc = xstrtok( s, whitespace_delim, position);
    return(rc);
}

/*!
 * @brief      STRTOK WITH ERROR HANDLING and user specified delimiters
 * @param[in]  s1       strtok string pointer
 * @param[in]  delim    delimiters
 * @param[in]  position requested position of the token
 * @return              strtok return
 *
 * Function behaves like original strtok
 */
char *xstrtok( char *s1, const char *delim, int position )
{
    char *rc;
    static char * full_string = NULL;
    static int token_count;

    OLD_ASSERT(!( delim == NULL ),"NULL pointer as delimiter in xstrtok()\n");

    if ( s1 )
    {
        if ( !full_string )
        {
            full_string = (char *)xmalloc( LINE_SIZE );
            full_string[0] = 0x0;
        }

        strncpy( full_string, s1, LINE_SIZE );
        token_count = 0;
    }

    INPUT_CHECK( token_count == position || position < 0, "Requested position %d dosn't match token position %d", position, token_count);
    rc = strtok( s1, delim );
    token_count++;

    INPUT_CHECK(!( rc == NULL ),"Missing token no. %d: original string '%s' with delimiters '%s'\n", token_count, full_string, delim );

    return(rc);
}



//=============================================================================
// MAKE INI KEYS LIST
//=============================================================================
void make_ini_item_list(const char *fname)
{
    FILE *ini;

    char line[ LINE_SIZE ];
    char string[ LINE_SIZE ];
    char section[ LINE_SIZE ];//="";
    char *section_ptr;
    char *key;
    char *value;
    char *tmp;
    struct Ini_item *prev = NULL;

    read_ini=(struct Read_ini*)xmalloc(sizeof(struct Read_ini));

    ini=xfopen(fname,"rt");
    ASSERT(ini)(fname).error("Failed to open the ini file");


    while( xfgets( line, LINE_SIZE - 2, ini ) != NULL ) {
        sscanf( line, "%s", string );      // store first substring in the string


        if (strlen(string)==0)             // skips start blank lines
            continue;

        // READ SECTION
        section_ptr = section_test(string);
        if ( section_ptr ) { // test of new section
            strcpy(section,section_ptr);
            continue;                   // go to next line
        }

        if(strchr(line,'=') == NULL)    // test of "=" character on the line
            continue;

        // CLEAR COMMENTS
        tmp = strstr(line,"#");     // find comment position
        if(tmp != NULL){
            sprintf(tmp,"%s","");   // force ends string on comment position
            if(strlen(line) == 0)   // continue if line contains only comment
                continue;           // go to next line
        }

        // READ KEY
        tmp = xstrtok(line,"=");    // read characters before "="
        sscanf(tmp,"%s",string);    // strip spaces
        if(strlen(string) == 0)
            continue;
        else
            key = xstrcpy(string);


        //READ VALUE
        tmp = xstrtok(NULL,"=");
        tmp = strip_spaces(tmp);
        if(strlen(tmp) == 0){ //string
            xfree(key);
            continue;
        }
        else
            value = xstrcpy(tmp);

/*
        printf("%s\n",section);
        printf("%s\n",key);
        printf("%s\n\n",value);
*/

        prev = new_item(prev,section,key,value);
        xfree(key);
        xfree(value);
    };
};
//=============================================================================
// STRIP START AND END BLANK CHARACTERS
//=============================================================================
char *strip_spaces(char *string)
{
    int i;
    while((string[0] ==' ') || (string[0] =='\t')){
        string++;
    }
    i = strlen(string) - 1;
    while((string[i] ==' ') || (string[i] =='\t') || (string[i] =='\n')  || (string[i] =='\r')){
        string[i--] = 0;
    }
    return string;
}
//=============================================================================
// ADD NEW KEY TO INI-LIST
//=============================================================================
struct Ini_item *new_item(struct Ini_item *prev,char *section, char *key, char *value)
{
    struct Ini_item *ini_item;

    if((section != NULL) && (key != NULL) && (value != NULL)){
        ini_item=(struct Ini_item*)xmalloc(sizeof(struct Ini_item));

        if(prev == NULL){
            read_ini->ini_item = ini_item;
            ini_item->prev = NULL;
        }
        else{
            ini_item->prev = prev;
            ini_item->next = NULL;
            prev->next = ini_item;
        }

        ini_item->section = xstrcpy(section);
        ini_item->key = xstrcpy(key);
        ini_item->value = xstrcpy(value);
        return ini_item;
    }
    else
        return prev;

}
//=============================================================================
// TEST OF SECTION STRING
//=============================================================================
char *section_test(char *line)
{
    if(line == NULL) return NULL;

    if( (line[0] == '[') && (line[strlen(line)-1] == ']') && (strlen(line) > 2))
        return (xstrtok(line,"[]"));
    else
        return (NULL);
};

/*!
 * @brief Create new string from selected variable from ini file
 * @param[in] section  Inifile section
 * @param[in] key      Inifile key
 * @param[in] defval   Default value, if key is not found in inifile
 * @return Ptr to new string with option value from Inifile or to default value
 */
char *OptGetStr(const char *section,const char *key,const char *defval)
{
    xprintf(Err, "OptGetXXX input interface is not supported anymore.\n");


    const char *rc = NULL;
    struct Ini_item *ini_item;

    FOR_INI_ITEMS(ini_item)
        if( (!strcmp(ini_item->section,section)) && (!strcmp(ini_item->key,key)) ){
            rc = ini_item->value;
            break;
        }

    if (rc == NULL) {
        if (defval == NULL)
            xprintf(UsrErr,"Required parameter: section '%s' key '%s' is not given.\n",section,key);
        else
            rc = defval;
    }

    return xstrcpy(rc);
}

//=============================================================================
// GET FILE NAME VARIABLE FROM INI FILE
//=============================================================================
char *OptGetFileName(const char *section,const char *key,const char *defval)
{


    return OptGetStr(section,key,defval);
}

//=============================================================================
// GET INT VARIABLE FROM INI FILE
//=============================================================================
long int OptGetInt( const char *section,const char *key,const char *defval )
{
    char *str;
    long int res;

    str=OptGetStr(section,key,defval);
    if (sscanf(str,"%ld",&res) == 0) {
        if (defval == NULL) xprintf(UsrErr,"Can not convert to integer parameter: [%s] %s.\n",section,key);
        xprintf(PrgErr,"Default value %s of parameter: [%s] %s is not an integer.\n",defval,section,key);
    }

    xfree( str );
    return res;
}

//=============================================================================
// GET DOUBLE VARIABLE FROM INI FILE
//=============================================================================
double OptGetDbl( const char *section,const  char *key,const  char *defval )
{
    char *str;
    double res;

    str=OptGetStr(section,key,defval);
    if (sscanf(str,"%lg",&res) == 0) {
        if (defval == NULL) xprintf(UsrErr,"Can not convert to double parameter: [%s] %s.\n",section,key);
        if (sscanf(defval,"%lg",&res) == 0)
            xprintf(PrgErr,"Default value \"%s\" of parameter: [%s] %s is not an double.\n",defval,section,key);
    }

    xfree( str );
    return res;
}

//=============================================================================
// GET BOOL VARIABLE FROM INI FILE
//=============================================================================
bool OptGetBool( const char *section,const  char *key,const  char *defval )
{
    char *str;
    char res=false;
    str = OptGetStr(section, key, defval);

    if ( boost::iequals(str, "yes") || boost::iequals(str, "true") || boost::iequals(str, "1") ) res=true;
    else if ( boost::iequals(str, "no") || boost::iequals(str, "false") || boost::iequals(str, "0") ) res=false;
    else {
        xfree(str);
        if (defval == NULL) xprintf(UsrErr,"Required parameter: [%s] %s is not a boolen.\n",section,key);
        str=(char *)defval;
        if ( boost::iequals(str, "yes") || boost::iequals(str, "true") || boost::iequals(str, "1") ) res=true;
        else if ( boost::iequals(str, "no") || boost::iequals(str, "false") || boost::iequals(str, "0") ) res=false;
        else xprintf(PrgErr,"Default value \"%s\" of parameter: [%s] %s is not a boolean.\n",defval,section,key);
    }
    return res;
}
/*!
 * @brief           Load options file
 * @param[in] fname File name
 */
void OptionsInit(const char *fname )
{
    //char *path;
    //int len;

    ASSERT(fname).error("NULL file name.\n");

    // take absolute path to the file
    // this is completly wrong in the case the absolute path is alredy given
    // since we should remain in the workdir when calling this it is not critical
    // to hava correct function for path manipulation (see BOOST)
    /*
    path=xgetcwd();
    len=strlen(path)+strlen(fname)+1;
    if ( len > PATH_MAX )
    {
        xprintf(UsrErr, "Path too long\n");
    }
    strcpy( options_fname, path ); xfree(path);
    strcat( options_fname, PATH_SEP );
    strcat( options_fname, fname );
*/

    // initialization of the INI reader
    make_ini_item_list(fname);
    
}

//=============================================================================
// GET DOUBLE ARRAY VARIABLE FROM INI FILE
//=============================================================================
void OptGetDblArray( const char *section,const  char *key,const  char *defval, std::vector<double> &array)
// ArrSize contain number of Array members (length), *Array is the adress of array which should be filled up
{

    char * tmp_str = OptGetStr(section,key,defval);
    std::string str = tmp_str;
    free(tmp_str);
    boost::tokenizer<boost::char_separator<char> > line_tokenizer(str, boost::char_separator<char>("\t "));
    boost::tokenizer<boost::char_separator<char> >::iterator tok;

    double value;
    try {
        for(    tok = line_tokenizer.begin();
                tok != line_tokenizer.end();
                ++tok) {
            value = boost::lexical_cast<double> (*tok);
            array.push_back(value);
        }
    }  catch (boost::bad_lexical_cast &) {
        xprintf(UsrErr, "INI file: Can not convert token `%s` of key `[%s] %s` to double.\n", (*tok).c_str(), section, key);
    }
}


//=============================================================================
// GET Int ARRAY VARIABLE FROM INI FILE
//=============================================================================
void OptGetIntArray( const char *section,const  char *key,const  char *defval, int ArrSize, int *Array)// ArrSize contain number of Array members (length), *Array is the adress of array which should be filled up
{
    char *str;
    int res;
    int i;

    str=OptGetStr(section,key,defval);
    for(i = 1; i < ArrSize; i++){
        if (sscanf(str,"%d",&res) == 0) {
        if (defval == NULL) xprintf(UsrErr,"Can not convert %d. ini-file entry to integer parameter: [%s] %s.\n",i,section,key);
        if (sscanf(defval,"%d",&res) == 0)
            xprintf(PrgErr,"Default value \"%s\" of parameter: [%s] %s is not an integer.\n",defval,section,key);
        }else{
          *(Array + (i-1)*sizeof(double)) = res;
        }
    }

    free( str );
    return;
}

//=============================================================================
// GET string ARRAY VARIABLE FROM INI FILE
//=============================================================================
/*char *OptGetStrArray(const char *section,const char *key, int sb_count, struct TS_lat *dest)
{
    const char **rc = NULL;
    struct Ini_item *ini_item;
    int i;

    FOR_INI_ITEMS(ini_item)
        if( (!strcmp(ini_item->section,section)) && (!strcmp(ini_item->key,key)) ){
            for(i=0; i < sb_count; i++)
            {
              if(sscanf(ini_item->value,"%s",dest[i].nazev) == NULL)
              {
                printf("\nerror during required %d-th parameter initialization occured\n",i);
              }else{
                printf("\nthe name of %d-th substance is %s\n",i,dest[i].nazev);
              }
            }
            //
            *rc = ini_item->value;
            break;
        }

    if (rc == NULL) {
        if (defval == NULL)
            xprintf(UsrErr,"Required parameter: [%s] %s is not given.\n",section,key);
        else
            *rc = defval;
    }
    return xstrcpy(*rc);
}*/