c576d7d4a0
This improves test coverage of the lexer. Before, a SpyReader's read function would return pointers into a single string that contained the entire text. This could have masked bugs where out-of-bounds characters were being read. Now the chunks returned by the reader are copied into a separate buffer.
41 lines
1,016 B
C++
41 lines
1,016 B
C++
#include "runtime/helpers/spy_reader.h"
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#include <algorithm>
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using std::string;
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static const char * spy_read(void *data, size_t *bytes_read) {
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SpyReader *reader = static_cast<SpyReader *>(data);
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string result = reader->content.substr(reader->position, reader->chunk_size);
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reader->position += result.size();
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reader->strings_read.back() += result;
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*bytes_read = result.size();
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memcpy(reader->buffer, result.data(), result.size());
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return reader->buffer;
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}
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static int spy_seek(void *data, TSLength position) {
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SpyReader *reader = static_cast<SpyReader *>(data);
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reader->strings_read.push_back("");
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reader->position = position.bytes;
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return 0;
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}
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SpyReader::SpyReader(string content, size_t chunk_size) :
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buffer(new char[chunk_size]),
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content(content),
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position(0),
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chunk_size(chunk_size),
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input({
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this,
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spy_read,
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spy_seek,
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nullptr,
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}) {}
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void SpyReader::clear() {
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strings_read.clear();
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}
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SpyReader::~SpyReader() {
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delete buffer;
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}
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