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Fixed a file loading bug not covered by the mycology test suite

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This commit is contained in:
Julien Dessaux 2021-10-02 00:59:38 +02:00
parent 749caa9e26
commit 483d5c6a46
3 changed files with 38 additions and 8 deletions
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28
pkg/field/field.go
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@ -36,13 +36,19 @@ func Load(fd io.Reader) (*Field, error) {
data := make([]byte, 4096)
if n, errRead := fd.Read(data); errRead != nil {
if errRead == io.EOF {
if f.ly == 0 && l.l == 0 {
return nil, newDecodeError("No instruction on the first line of the file produces an unusable program in Befunge98")
if f.ly == 0 {
if l.l == 0 {
return nil, newDecodeError("No instruction on the first line of the file produces an unusable program in Befunge98")
}
f.x = l.x
}
if l.l > 0 {
f.ly++
if f.lx-f.x < l.l-l.x {
f.lx = l.l - l.x + f.x
if f.x < l.x {
f.x = l.x
}
if f.lx < l.l+l.x-f.x {
f.lx = l.l + l.x - f.x
}
f.lines = append(f.lines, *l)
}
@ -56,12 +62,18 @@ func Load(fd io.Reader) (*Field, error) {
continue
}
if data[i] == '\n' || data[i] == '\r' {
if f.ly == 0 && l.l == 0 {
return nil, newDecodeError("No instruction on the first line of the file produces an unusable program in Befunge98")
if f.ly == 0 {
if l.l == 0 {
return nil, newDecodeError("No instruction on the first line of the file produces an unusable program in Befunge98")
}
f.x = l.x
}
f.ly++
if f.lx < l.l {
f.lx = l.l
if f.x > l.x {
f.x = l.x
}
if f.lx < l.l+l.x-f.x {
f.lx = l.l + l.x - f.x
}
f.lines = append(f.lines, *l)
l = new(Line)