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glfw/input.c: fix dedup to swap duplicates to end instead of overwriting pointers
Agent-Logs-Url: https://github.com/kovidgoyal/kitty/sessions/071dfd57-73e7-4daa-8d35-955bec8b1c4b Co-authored-by: kovidgoyal <1308621+kovidgoyal@users.noreply.github.com>
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glfw/input.c
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19
glfw/input.c
vendored
@@ -421,15 +421,22 @@ size_t _glfwInputDropEvent(_GLFWwindow *window, GLFWDropEventType type, double x
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size_t write_pos = 0;
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for (size_t i = 0; i < num_mimes; i++) {
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if (mime_dedup_set_is_end(mime_dedup_set_get(&seen, mimes[i]))) {
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if (!mime_dedup_set_is_end(mime_dedup_set_insert(&seen, mimes[i])))
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mimes[write_pos++] = mimes[i];
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else {
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// OOM: keep remaining entries without further deduplication
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mimes[write_pos++] = mimes[i];
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for (size_t j = i + 1; j < num_mimes; j++) mimes[write_pos++] = mimes[j];
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if (mime_dedup_set_is_end(mime_dedup_set_insert(&seen, mimes[i]))) {
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// OOM: shift remaining entries to write_pos and stop deduplicating
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memmove(mimes + write_pos, mimes + i, (num_mimes - i) * sizeof(const char*));
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write_pos += num_mimes - i;
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break;
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}
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// Swap the unique entry into write_pos; the displaced entry moves to
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// position i where it will end up at or beyond the new num_mimes.
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if (write_pos != i) {
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const char *tmp = mimes[write_pos];
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mimes[write_pos] = mimes[i];
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mimes[i] = tmp;
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}
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write_pos++;
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}
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// duplicate: left in-place; will end up at a position >= new num_mimes
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}
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num_mimes = write_pos;
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mime_dedup_set_cleanup(&seen);
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