~centralelyon2010/inkscape/imagelinks2

#ifndef SEEN_HELPER_FNS_H

#define SEEN_HELPER_FNS_H

/** \file

 *

 * Some helper functions

 *

 * Authors:

 *   Felipe Corrêa da Silva Sanches <juca@members.fsf.org>

 *

 *

 * Copyright (C) 2006 Hugo Rodrigues

 *

 * Released under GNU GPL, read the file 'COPYING' for more information

 */

#include <string.h>

#include <vector>

#include <sstream>

// calling helperfns_read_number(string, false), it's not obvious, what

// that false stands for. helperfns_read_number(string, HELPERFNS_NO_WARNING)

// can be more clear.

#define HELPERFNS_NO_WARNING false

/* convert ascii representation to double

 * the function can only be used to convert numbers as given by gui elements that use localized representation

 * @param value ascii representation of the number

 * @return the converted number

 *

 * Setting warning to false disables conversion error warnings from

 * this function. This can be useful in places, where the input type

 * is not known beforehand. For example, see sp_feColorMatrix_set in

 * sp-fecolormatrix.cpp */

inline double helperfns_read_number(gchar const *value, bool warning = true) {

    if (!value) {

        g_warning("Called helperfns_read_number with value==null_ptr, this can lead to unexpected behaviour.");

        return 0;

    }

    char *end;

    double ret = g_ascii_strtod(value, &end);

    if (*end) {

        if (warning) {

            g_warning("helper-fns::helperfns_read_number() Unable to convert \"%s\" to number", value);

        }

        // We could leave this out, too. If strtod can't convert

        // anything, it will return zero.

        ret = 0;

    }

    return ret;

}

inline bool helperfns_read_bool(gchar const *value, bool default_value){

    if (!value) return default_value;

    switch(value[0]){

        case 't':

            if (strncmp(value, "true", 4) == 0) return true;

            break;

        case 'f':

            if (strncmp(value, "false", 5) == 0) return false;

            break;

    }

    return default_value;

}

/* convert ascii representation to double

 * the function can only be used to convert numbers as given by gui elements that use localized representation

 * numbers are delimeted by space

 * @param value ascii representation of the number

 * @param size number of elements in string

 * @return the vector of the converted numbers

 */

inline std::vector<gdouble> helperfns_read_vector(const gchar* value, int size){

        std::vector<gdouble> v(size, (gdouble) 0);

        std::istringstream is(value);

        for(int i = 0; i < size; i++){

        	std::string str;

            is >> str;

            char *end;

            double ret = g_ascii_strtod(str.c_str(), &end);

            if (*end) {

                g_warning("helper-fns::helperfns_read_vector() Unable to convert \"%s\" to number", str.c_str());

                // We could leave this out, too. If strtod can't convert

                // anything, it will return zero.

                ret = 0;

            }

            v[i] = ret;

        };

        return v;

}

/* convert ascii representation to double

 * the function can only be used to convert numbers as given by gui elements that use localized representation

 * numbers are delimeted by space

 * @param value ascii representation of the number

 * @return the vector of the converted numbers

 */

inline std::vector<gdouble> helperfns_read_vector(const gchar* value){

        std::vector<gdouble> v;

        gchar const* beg = value;

        while(isspace(*beg)) beg++;

        while(*beg)

        {

            char *end;

            double ret = g_ascii_strtod(beg, &end);

            if (end==beg){

                g_warning("helper-fns::helperfns_read_vector() Unable to convert \"%s\" to number", beg);

                // We could leave this out, too. If strtod can't convert

                // anything, it will return zero.

                ret = 0;

            }

            v.push_back(ret);

            beg = end;

            while(isspace(*beg)) beg++;

        }

        return v;

}

#endif /* !SEEN_HELPER_FNS_H */

/*

  Local Variables:

  mode:c++

  c-file-style:"stroustrup"

  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))

  indent-tabs-mode:nil

  fill-column:99

  End:

*/

// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :