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bigint unmarshaller to support numbers or numbered strings #100

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Merged
merged 2 commits into from
Oct 23, 2025
Merged

bigint unmarshaller to support numbers or numbered strings #100

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08539ad
bigint unmarshaller to support numbers or numbered strings
pkieltyka Oct 23, 2025
b3f2d27
update
pkieltyka Oct 23, 2025
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24 changes: 20 additions & 4 deletions bigintHelpers.go.tmpl
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Original file line number Diff line number Diff line change
Expand Up @@ -24,13 +24,29 @@ func (b BigInt) MarshalText() ([]byte, error) {

// UnmarshalText implements encoding.TextUnmarshaler.
func (b *BigInt) UnmarshalText(text []byte) error {
t := string(text)
if len(text) <= 2 || t == "null" || t == "" {
if len(text) == 0 {
return nil
}
i, ok := big.NewInt(0).SetString(string(text[1:len(text)-1]), 10)
if len(text) == 4 && text[0] == 'n' && string(text) == "null" {
return nil
}
for _, c := range text {
if c == ' ' || c == '\t' || c == '\n' || c == '\r' {
return fmt.Errorf("BigInt.UnmarshalText: unexpected whitespace in %q", text)
}
}
var digits []byte
if text[0] == '-' || (text[0] >= '0' && text[0] <= '9') {
digits = text
} else {
if len(text) < 2 || text[0] != '"' || text[len(text)-1] != '"' {
return fmt.Errorf("BigInt.UnmarshalText: unsupported format %q", text)
}
digits = text[1 : len(text)-1]
}
i, ok := big.NewInt(0).SetString(string(digits), 10)
if !ok {
return fmt.Errorf("BigInt.UnmarshalText: failed to unmarshal %q", text)
return fmt.Errorf("BigInt.UnmarshalText: failed to parse %q", text)
}
*b = BigInt(*i)
return nil
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