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use bufio;
use io;
use encoding::utf8;
use strings;
use memio;
use fmt;
// Reads records from an io::handle and returns them. The result must be freed
// using [[freerecords]].
export fn readrecords(r: io::handle) ([][]str | io::error | utf8::invalid) = {
const sc = bufio::newscanner(r);
defer bufio::finish(&sc);
let records: [][]str = [];
for (const line: str => bufio::scan_line(&sc)?) {
append(records, strings::dupall(strings::split(line, "\t")));
};
return records;
};
// Frees all the records.
export fn freerecords(records: [][]str) void = {
for (const record .. records) {
strings::freeall(record);
};
free(records);
};
@test fn readnormal() void = {
const b = strings::toutf8("col1\tcol2\tcol3
1\t2\t3
4\t5\t6\n"
);
const st = memio::fixed(b);
const expected = [
["col1", "col2", "col3"],
["1", "2", "3"],
["4", "5", "6"],
];
const actual = readrecords(&st)!;
defer freerecords(actual);
for (let i = 0z; i < len(expected); i += 1) {
for (let j = 0z; j < len(actual); j += 1) {
const exp = expected[i][j];
const act = actual[i][j];
fmt::errorfln("exp: {}", exp)!;
fmt::errorfln("act: {}", act)!;
assert(exp == act);
};
};
};
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