47 lines
794 B
Go
47 lines
794 B
Go
package diff
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// compareStrings compares two strings character by character, optionally ignoring whitespace.
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func compareStrings(str1, str2 string, compareSpace bool) bool {
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if compareSpace {
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return str1 == str2
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}
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var i, j int
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l1 := len(str1)
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l2 := len(str2)
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for i < l1 && j < l2 {
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for i < l1 && isWhitespace(str1[i]) {
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i++
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}
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for j < l2 && isWhitespace(str2[j]) {
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j++
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}
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if i < l1 && j < l2 && str1[i] != str2[j] {
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return false
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}
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if i < l1 {
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i++
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}
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if j < l2 {
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j++
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}
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}
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for i < l1 && isWhitespace(str1[i]) {
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i++
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}
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for j < l2 && isWhitespace(str2[j]) {
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j++
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}
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return i == l1 && j == l2
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}
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func isWhitespace(b byte) bool {
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return b == ' ' ||
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b == '\t' ||
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b == '\n' ||
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b == '\r' ||
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b == '\v' ||
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b == '\f' ||
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b == 0x85 ||
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b == 0xA0
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}
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