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/* bytes to hex implementation */
#include "Python.h"
static PyObject *_Py_strhex_impl(const char* argbuf, const Py_ssize_t arglen,
                                 int return_bytes)
    PyObject *retval;
    Py_UCS1* retbuf;
    Py_ssize_t i, j;
    assert(arglen >= 0);
    if (arglen > PY_SSIZE_T_MAX / 2)
        return PyErr_NoMemory();
    if (return_bytes) {
        /* If _PyBytes_FromSize() were public we could avoid malloc+copy. */
        retbuf = (Py_UCS1*) PyMem_Malloc(arglen*2);
	if (!retbuf)
	    return PyErr_NoMemory();
        retval = NULL;  /* silence a compiler warning, assigned later. */
    } else {
	retval = PyUnicode_New(arglen*2, 127);
	if (!retval)
	    return NULL;
	retbuf = PyUnicode_1BYTE_DATA(retval);
    /* make hex version of string, taken from shamodule.c */
    for (i=j=0; i < arglen; i++) {
        unsigned char c;
        c = (argbuf[i] >> 4) & 0xf;
        retbuf[j++] = Py_hexdigits[c];
        c = argbuf[i] & 0xf;
        retbuf[j++] = Py_hexdigits[c];
    if (return_bytes) {
        retval = PyBytes_FromStringAndSize((const char *)retbuf, arglen*2);
        PyMem_Free(retbuf);
#ifdef Py_DEBUG
        assert(_PyUnicode_CheckConsistency(retval, 1));
    return retval;
PyAPI_FUNC(PyObject *) _Py_strhex(const char* argbuf, const Py_ssize_t arglen)
    return _Py_strhex_impl(argbuf, arglen, 0);
/* Same as above but returns a bytes() instead of str() to avoid the
 * need to decode the str() when bytes are needed. */
PyAPI_FUNC(PyObject *) _Py_strhex_bytes(const char* argbuf, const Py_ssize_t arglen)
    return _Py_strhex_impl(argbuf, arglen, 1);

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