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Convert jsonpull to C++ with shared_ptr and std::vector/std::string

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Replace the manual malloc/realloc/free memory management in jsonpull
with std::shared_ptr ownership. Each json_object now owns its children
through std::vector<json_object_ptr>; raw back-pointers to parent and
parser remain valid by structural invariant and are cleared on
json_disconnect so detached subtrees can outlive their parser.
Strings become std::string, child arrays become std::vector, and the
old union becomes a struct so non-trivial members can coexist while
preserving the existing o->value.xxx access paths.

The old jsonpull.c is replaced by jsonpull.cpp, json_stringify now
returns std::string, and all callers across tippecanoe, tile-join,
tippecanoe-decode, tippecanoe-json-tool, tippecanoe-overzoom and the
unit tests are updated to use json_object_ptr / json_pull_ptr.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Erica Fischer
2026-05-30 17:48:32 -07:00
co-authored by Cursor
parent 9381158165
commit 3da03c6075
25 changed files with 1295 additions and 531 deletions
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clip.cpp
+2 -2
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@@ -1221,7 +1221,7 @@ std::string overzoom(std::vector<input_tile> const &tiles, int nz, int nx, int n
std::vector<std::string> const &exclude_prefix,
bool do_compress,
std::vector<std::pair<unsigned, unsigned>> *next_overzoomed_tiles,
bool demultiply, json_object *filter, bool preserve_input_order,
bool demultiply, json_object_ptr filter, bool preserve_input_order,
std::unordered_map<std::string, attribute_op> const &attribute_accum,
std::vector<std::string> const &unidecode_data, double simplification,
double tiny_polygon_size,
@@ -1457,7 +1457,7 @@ std::string overzoom(std::vector<source_tile> const &tiles, int nz, int nx, int
std::vector<std::string> const &exclude_prefix,
bool do_compress,
std::vector<std::pair<unsigned, unsigned>> *next_overzoomed_tiles,
bool demultiply, json_object *filter, bool preserve_input_order,
bool demultiply, json_object_ptr filter, bool preserve_input_order,
std::unordered_map<std::string, attribute_op> const &attribute_accum,
std::vector<std::string> const &unidecode_data, double simplification,
double tiny_polygon_size,