44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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#include "tree_sitter/runtime.h"
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#include "tree_sitter/parser.h"
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TSLexer ts_lexer_make() {
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return (TSLexer) {
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.chunk = NULL,
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.debug = 0,
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.chunk_start = 0,
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.chunk_size = 0,
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.position_in_chunk = 0,
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.token_start_position = 0,
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.token_end_position = 0,
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.reached_end = 0
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};
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}
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int ts_lexer_advance(TSLexer *lexer) {
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static const char *empty_chunk = "";
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if (lexer->position_in_chunk + 1 < lexer->chunk_size) {
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lexer->position_in_chunk++;
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} else {
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lexer->chunk_start += lexer->chunk_size;
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lexer->chunk = lexer->input.read_fn(lexer->input.data, &lexer->chunk_size);
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lexer->position_in_chunk = 0;
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if (lexer->reached_end) {
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return 0;
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}
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if (lexer->chunk_size == 0) {
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lexer->reached_end = 1;
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lexer->chunk = empty_chunk;
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}
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}
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return 1;
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}
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TSTree * ts_lexer_build_node(TSLexer *lexer, TSSymbol symbol) {
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size_t current_position = ts_lexer_position(lexer);
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size_t size = current_position - lexer->token_start_position;
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size_t offset = lexer->token_start_position - lexer->token_end_position;
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lexer->token_end_position = current_position;
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return ts_tree_make_leaf(symbol, size, offset);
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}
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