aacc930023
Avoid unnecessary heap allocations, just use temporary variables. Actually update the string parameters passed by pointer/non-const reference. This requires the pointers passed to actually be non-const, so update the C-specific unit test runme to use a char buffer instead of a literal string. Also simplify the code copying the string contents to just use strdup() (if there are ever any platforms where this POSIX functions is not available, we could just define it ourselves once instead of using strlen() + malloc() + memcpy() manually twice).
67 lines
1.2 KiB
OpenEdge ABL
67 lines
1.2 KiB
OpenEdge ABL
%{
|
|
#include <string>
|
|
%}
|
|
|
|
%fragment("SwigStrInOut", "header") {
|
|
class SwigStrInOut {
|
|
std::string str_;
|
|
char* ptr_;
|
|
size_t len_;
|
|
public:
|
|
void init(char* ptr) {
|
|
ptr_ = ptr;
|
|
if (ptr_) {
|
|
str_ = ptr_;
|
|
len_ = str_.length();
|
|
}
|
|
}
|
|
|
|
std::string* str() { return &str_; }
|
|
|
|
~SwigStrInOut() {
|
|
if (ptr_) {
|
|
memcpy(ptr_, str_.c_str(), len_);
|
|
ptr_[len_] = '\0';
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
namespace std {
|
|
|
|
// use "const string &" typemaps for wrapping member strings
|
|
%naturalvar string;
|
|
|
|
class string;
|
|
|
|
%typemap(ctype) string, const string & "const char *"
|
|
%typemap(ctype) string * "char *"
|
|
%typemap(ctype) string & "char *"
|
|
|
|
%typemap(in) string %{
|
|
if ($input)
|
|
$1 = $input;
|
|
%}
|
|
|
|
%typemap(in) const string & (std::string temp) %{
|
|
if ($input)
|
|
temp = $input;
|
|
$1 = &temp;
|
|
%}
|
|
|
|
%typemap(in, fragment="SwigStrInOut") string * (SwigStrInOut temp), string & (SwigStrInOut temp) %{
|
|
temp.init($input);
|
|
$1 = temp.str();
|
|
%}
|
|
|
|
// Note that we don't support strings with embedded NULs, as there is no way to
|
|
// return their length to C code anyhow.
|
|
%typemap(out) string %{
|
|
$result = strdup(cppresult.c_str());
|
|
%}
|
|
|
|
%typemap(out) const string &, string *, string & %{
|
|
$result = strdup(cppresult->c_str());
|
|
%}
|
|
|
|
}
|