82 lines
1.9 KiB
Hare
82 lines
1.9 KiB
Hare
// License: MPL-2.0
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// (c) 2022 Sebastian <sebastian@sebsite.pw>
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use fmt;
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use io;
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use strings;
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use memio;
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// Dumps a [[value]] into an [[io::handle]] as a string without any additional
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// formatting.
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export fn dump(out: io::handle, val: value) (size | io::error) = {
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let z = 0z;
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match (val) {
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case let v: (f64 | bool) =>
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z += fmt::fprint(out, v)?;
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case let s: str =>
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z += fmt::fprint(out, `"`)?;
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let it = strings::iter(s);
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for (const r => strings::next(&it)) {
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switch (r) {
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case '\b' =>
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z += fmt::fprint(out, `\b`)?;
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case '\f' =>
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z += fmt::fprint(out, `\f`)?;
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case '\n' =>
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z += fmt::fprint(out, `\n`)?;
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case '\r' =>
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z += fmt::fprint(out, `\r`)?;
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case '\t' =>
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z += fmt::fprint(out, `\t`)?;
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case '\"' =>
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z += fmt::fprint(out, `\"`)?;
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case '\\' =>
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z += fmt::fprint(out, `\\`)?;
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case =>
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if (iscntrl(r)) {
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z += fmt::fprintf(out, `\u{:.4x}`,
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r: u32)?;
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} else {
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z += fmt::fprint(out, r)?;
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};
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};
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};
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z += fmt::fprint(out, `"`)?;
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case _null =>
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z += fmt::fprint(out, "null")?;
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case let a: []value =>
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z += fmt::fprint(out, "[")?;
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for (let i = 0z; i < len(a); i += 1) {
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z += dump(out, a[i])?;
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if (i < len(a) - 1) {
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z += fmt::fprint(out, ",")?;
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};
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};
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z += fmt::fprint(out, "]")?;
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case let o: object =>
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z += fmt::fprint(out, "{")?;
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let comma = false;
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let it = iter(&o);
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for (true) match (next(&it)) {
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case void => break;
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case let pair: (const str, const *value) =>
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if (comma) {
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z += fmt::fprint(out, ",")?;
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};
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comma = true;
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z += dump(out, pair.0)?;
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z += fmt::fprint(out, ":")?;
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z += dump(out, *pair.1)?;
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};
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z += fmt::fprint(out, "}")?;
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};
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return z;
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};
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// Dumps a [[value]] into a string without any additional formatting. The caller
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// must free the return value.
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export fn dumpstr(val: value) str = {
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let s = memio::dynamic();
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dump(&s, val)!;
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return memio::string(&s)!;
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};
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