cpython/Objects/stringlib/replace.h

/* stringlib: replace implementation */

#ifndef STRINGLIB_FASTSEARCH_H
#error must include "stringlib/fastsearch.h" before including this module
#endif

Py_LOCAL_INLINE(void)
STRINGLIB(replace_1char_inplace)(STRINGLIB_CHAR* s, STRINGLIB_CHAR* end,
                                 Py_UCS4 u1, Py_UCS4 u2, Py_ssize_t maxcount)
{ … }