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#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 :
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