#ifndef SEEN_HELPER_FNS_H #define SEEN_HELPER_FNS_H /** \file * * Some helper functions * * Authors: * Felipe CorrĂȘa 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 localized 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_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 localized 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_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 localized 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_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:encoding=utf-8:textwidth=99 :