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58 lines
1.1 KiB
58 lines
1.1 KiB
package ftp |
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// A scanner for fields delimited by one or more whitespace characters |
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type scanner struct { |
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bytes []byte |
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position int |
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} |
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// newScanner creates a new scanner |
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func newScanner(str string) *scanner { |
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return &scanner{ |
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bytes: []byte(str), |
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} |
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} |
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// NextFields returns the next `count` fields |
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func (s *scanner) NextFields(count int) []string { |
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fields := make([]string, 0, count) |
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for i := 0; i < count; i++ { |
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if field := s.Next(); field != "" { |
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fields = append(fields, field) |
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} else { |
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break |
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} |
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} |
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return fields |
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} |
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// Next returns the next field |
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func (s *scanner) Next() string { |
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sLen := len(s.bytes) |
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// skip trailing whitespace |
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for s.position < sLen { |
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if s.bytes[s.position] != ' ' { |
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break |
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} |
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s.position++ |
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} |
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start := s.position |
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// skip non-whitespace |
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for s.position < sLen { |
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if s.bytes[s.position] == ' ' { |
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s.position++ |
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return string(s.bytes[start : s.position-1]) |
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} |
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s.position++ |
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} |
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return string(s.bytes[start:s.position]) |
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} |
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// Remaining returns the remaining string |
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func (s *scanner) Remaining() string { |
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return string(s.bytes[s.position:len(s.bytes)]) |
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}
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