scan_jsonescape - parse JSON escaped string

       scan_jsonescape  parses  JSON  escaped  text  from src into dest, leaving a UTF-8 string in dest. Parsing
       stops at the 0 terminator, invalid input characters or a double quote that was not escaped.

       It will then write the number of bytes in dest into *destlen, and return the number of bytes decoded from
       src.

       dest can be NULL. destlen can be NULL. dest can be src.

       To make sure dest is large enough, either allocate strlen(src)+1 bytes or call scan_jsonescape twice, the
       first time with dest == NULL (*destlen will still be written).

       scan_jsonescape("test

       scan_jsonescape - parse JSON escaped string

       scan_jsonescape returns the number of bytes successfully parsed from src.

fmt_jsonescape(3), scan_cescape(3), scan_ldapescape(3)

                                                                                              scan_jsonescape(3)

#include<libowfat/textcode.h>

       size_t scan_jsonescape(const char *src,char *dest,size_t* destlen);