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specialize string2int conversion to avoid std::string ctor

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This commit is contained in:
Dane Springmeyer 2012-02-23 13:11:25 -08:00
parent 84daf7a2ad
commit 871650a3c2
1 changed files with 27 additions and 0 deletions
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27
include/mapnik/util/conversions.hpp
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@ -35,6 +35,20 @@ namespace mapnik { namespace conversions {
using namespace boost::spirit;
// TODO - convert to templates
static bool string2int(const char * value, int * result)
{
size_t length = strlen(value);
if (length < 1 || value == NULL)
return false;
const char *begin = value;
const char *iter = begin;
const char *end = value + length;
bool r = qi::phrase_parse(iter,end,qi::int_,ascii::space,*result);
return r && (iter == end);
}
static bool string2int(std::string const& value, int * result)
{
if (value.empty())
@ -55,6 +69,19 @@ static bool string2double(std::string const& value, double * result)
return r && (str_beg == str_end);
}
static bool string2int(const char * value, double * result)
{
size_t length = strlen(value);
if (length < 1 || value == NULL)
return false;
const char *begin = value;
const char *iter = begin;
const char *end = value + length;
bool r = qi::phrase_parse(iter,end,qi::double_,ascii::space,*result);
return r && (iter == end);
}
}
}