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/*
Convenience templates for more c++-like conversions
between c++ and guile data,
not everything from guile/gh.h implemented!
*/
#include"rumor.hh"
#ifdef HAVE_GUILE
#include<stdexcept>
#define SPECIALIZATION_OF_SCM_TO(c_type,scm_conv,scm_pred) \
template<> const c_type SCM_to<c_type>(SCM s){ \
if (!scm_pred(s)) throw script_error("SCM_to: predicate " #scm_pred " false."); \
return scm_conv(s);}
SPECIALIZATION_OF_SCM_TO(unsigned long,scm_to_long,scm_is_number)
SPECIALIZATION_OF_SCM_TO(unsigned,scm_to_long,scm_is_number)
SPECIALIZATION_OF_SCM_TO(long,scm_to_long,scm_is_number)
SPECIALIZATION_OF_SCM_TO(int,scm_to_int,scm_is_number)
SPECIALIZATION_OF_SCM_TO(double,scm_to_double,scm_is_number)
SPECIALIZATION_OF_SCM_TO(bool,scm_to_bool,scm_is_bool)
#undef SPECIALIZATION_OF_SCM_TO
template<> const char SCM_to<char>(SCM s){
if (!scm_is_true (scm_char_p (s))) throw script_error("SCM_to: predicate " " scm_is_true " " false.");
return scm_to_char(s);} //FIXME: oget: recheck
template<> const std::string SCM_to<std::string>(SCM s){
if (!scm_is_string(s)) throw script_error("SCM_to: predicate " "scm_is_string" " false.");
char* pstr=scm_to_locale_string(s);
std::string ret(pstr);
delete[] pstr; //FIXME: is this correct?
return ret;
}
#define SPECIALIZATION_OF_TO_SCM(c_type,scm_conv) \
template<> SCM to_SCM(const c_type& arg){ \
return scm_conv(arg); }
SPECIALIZATION_OF_TO_SCM(unsigned long,scm_from_ulong)
SPECIALIZATION_OF_TO_SCM(unsigned,scm_from_ulong)
SPECIALIZATION_OF_TO_SCM(long,scm_from_ulong)
SPECIALIZATION_OF_TO_SCM(int,scm_from_int)
SPECIALIZATION_OF_TO_SCM(bool,scm_from_bool)
SPECIALIZATION_OF_TO_SCM(double,scm_make_real)
SPECIALIZATION_OF_TO_SCM(char,SCM_MAKE_CHAR)
#undef SPECIALIZATION_OF_TO_SCM
template<> SCM to_SCM(const std::string& arg){
return scm_from_locale_string(arg.c_str()); }
#endif /*HAVE_GUILE*/
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