45 lines
1.1 KiB
V
45 lines
1.1 KiB
V
module regext
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// escape_regex_chars escapes special regex metacharacters in a string
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// This makes a literal string safe to use in regex patterns.
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// Examples:
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// "file.txt" -> "file\.txt"
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// "a[123]" -> "a\[123\]"
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pub fn escape_regex_chars(s string) string {
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mut result := ''
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for ch in s {
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match ch {
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`.`, `^`, `$`, `*`, `+`, `?`, `{`, `}`, `[`, `]`, `\\`, `|`, `(`, `)` {
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result += '\\'
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}
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else {}
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}
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result += ch.ascii_str()
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}
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return result
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}
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// wildcard_to_regex converts a wildcard pattern (e.g., "*.txt") to a regex pattern.
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// This function does not add implicit ^ and $ anchors, allowing for substring matches.
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fn wildcard_to_regex(wildcard_pattern string) string {
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mut regex_pattern := ''
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for i, r in wildcard_pattern.runes() {
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match r {
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`*` {
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regex_pattern += '.*'
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}
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`?` {
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regex_pattern += '.'
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}
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`.`, `+`, `(`, `)`, `[`, `]`, `{`, `}`, `^`, `$`, `\\`, `|` {
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// Escape regex special characters
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regex_pattern += '\\' + r.str()
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}
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else {
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regex_pattern += r.str()
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}
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}
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}
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return regex_pattern
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}
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