Hojun-Cho
1657bdeda3
C bootstrap (phases 0-9):
cmd/wwc, cmd/6c, cmd/6a, cmd/6l, cmd/ww, rt, lib/*.
ww-side self-host (phase 10):
selfhost/cmd/wwc — ww-cgen frontend; bootstrap fixed point.
selfhost/cmd/6a — assembler; byte-identical to C 6a (test 991).
selfhost/cmd/6l — linker w/ archive (.a) support; byte-identical
to C 6l (test 992).
selfhost/cmd/ww — driver (build/run/version); byte-identical to
C ww (test 993).
make test: 15/15. make bootstrap: ww2.s == ww3.s, ww2.o == ww3.o,
ww2 == ww3 byte-identical, with the full ww-tooled chain.
31 lines
925 B
Plaintext
31 lines
925 B
Plaintext
// errors — error type (a string) and a few sentinels. Plan 9 model:
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// the empty string means OK, a non-empty string is the message.
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type error = str;
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def eEOF: error = "eof";
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def eShortRead: error = "short read";
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def eShortWrite: error = "short write";
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def eClosed: error = "closed";
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def eInvalid: error = "invalid argument";
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def ePerm: error = "permission denied";
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def eNotFound: error = "not found";
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def eExists: error = "already exists";
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export fn isnil(e: error) bool = {
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return e.len == 0;
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};
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// is — compare an error against a sentinel (or any other error). Pure
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// byte equality; same shape as strings.equal but kept here so callers
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// don't have to pull in strings just to compare.
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export fn is(e: error, want: error) bool = {
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if (e.len != want.len) { return false; };
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let i: i32 = 0;
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for (i < e.len) {
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if (e[i] != want[i]) { return false; };
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i += 1;
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};
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return true;
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};
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