Files
tippecanoe/raii.hpp
Claude 85547150c2 Throw instead of exiting from the tile clipping and overzooming code
The code reachable from overzooming a tile no longer calls exit(). It
reports errors by throwing tippecanoe_error, and owns its FILE * and
json_pull * handles through RAII wrappers so that nothing leaks when an
error unwinds the stack.

New files:

* errors.hpp/errors.cpp: the tippecanoe_error exception class, plus
  throw_tippecanoe_error() and throw_perror() helpers.
* raii.hpp: unique_file and unique_json_pull, both std::unique_ptr
  aliases, for FILE * and json_pull *.

exit() becomes throw in clip.cpp, mvt.cpp, mvt.hpp, read_json.cpp,
evaluator.cpp, text.cpp, geometry.cpp, attribute.cpp, and
write_json.hpp. Each tool's main() is now a try/catch around an
inner_main(), so the command-line tools exit with the status they
always did.

Along the way this fixes a z_stream leaked when compress() failed, an
exit() that could run from json_writer's destructor during unwinding,
and an exit() in mvt_value's hash function.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DuCSVGssWNUCpVEE8Yp5HT
2026-08-07 18:46:09 +00:00

29 lines
483 B
C++

#ifndef RAII_HPP
#define RAII_HPP
#include <memory>
#include <stdio.h>
#include "jsonpull/jsonpull.h"
// FILE* → unique_file
struct file_closer {
void operator()(FILE *f) {
if (f) {
fclose(f);
}
}
};
using unique_file = std::unique_ptr<FILE, file_closer>;
// json_pull* → unique_json_pull
struct json_pull_closer {
void operator()(json_pull *jp) {
if (jp) {
json_end(jp);
}
}
};
using unique_json_pull = std::unique_ptr<json_pull, json_pull_closer>;
#endif