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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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dirtiles.cpp
+6 -7
View File
@@ -248,9 +248,9 @@ sqlite3 *dirmeta2tmp(const char *fname) {
if (f == NULL) {
perror(name.c_str());
} else {
json_pull *jp = json_begin_file(f);
json_object *o = json_read_tree(jp);
if (o == NULL) {
json_pull_ptr jp = json_begin_file(f);
json_object_ptr o = json_read_tree(jp);
if (o == nullptr) {
fprintf(stderr, "%s: metadata parsing error: %s\n", name.c_str(), jp->error);
exit(EXIT_JSON);
}
@@ -260,19 +260,18 @@ sqlite3 *dirmeta2tmp(const char *fname) {
exit(EXIT_JSON);
}
for (size_t i = 0; i < o->value.object.length; i++) {
for (size_t i = 0; i < o->value.object.keys.size(); i++) {
if (o->value.object.keys[i]->type != JSON_STRING || o->value.object.values[i]->type != JSON_STRING) {
fprintf(stderr, "%s: non-string in metadata\n", name.c_str());
}
char *sql = sqlite3_mprintf("INSERT INTO metadata (name, value) VALUES (%Q, %Q);", o->value.object.keys[i]->value.string.string, o->value.object.values[i]->value.string.string);
char *sql = sqlite3_mprintf("INSERT INTO metadata (name, value) VALUES (%Q, %Q);", o->value.object.keys[i]->value.string.string.c_str(), o->value.object.values[i]->value.string.string.c_str());
if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) {
fprintf(stderr, "set %s in metadata: %s\n", o->value.object.keys[i]->value.string.string, err);
fprintf(stderr, "set %s in metadata: %s\n", o->value.object.keys[i]->value.string.string.c_str(), err);
}
sqlite3_free(sql);
}
json_end(jp);
fclose(f);
}