101 lines
2.3 KiB
V
101 lines
2.3 KiB
V
module builtin
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pub fn (b byte) is_space() bool {
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mut result := false
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#result.val = /^\s*$/.test(String.fromCharCode(b))
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return result
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}
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pub fn (c byte) str() string {
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res := ''
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#res.str = c.val.toString()
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return res
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}
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pub fn (c byte) ascii_str() string {
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res := ''
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#res.str = String.fromCharCode(c.val)
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return res
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}
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pub fn (c byte) repeat(count int) string {
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mut res := ''
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for _ in 0 .. count {
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res += c.ascii_str()
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}
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return res
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}
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[inline]
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pub fn (c byte) is_digit() bool {
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return c >= `0` && c <= `9`
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}
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// is_hex_digit returns `true` if the byte is either in range 0-9, a-f or A-F and `false` otherwise.
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// Example: assert byte(`F`) == true
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[inline]
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pub fn (c byte) is_hex_digit() bool {
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return (c >= `0` && c <= `9`) || (c >= `a` && c <= `f`) || (c >= `A` && c <= `F`)
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}
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// is_oct_digit returns `true` if the byte is in range 0-7 and `false` otherwise.
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// Example: assert byte(`7`) == true
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[inline]
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pub fn (c byte) is_oct_digit() bool {
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return c >= `0` && c <= `7`
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}
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// is_bin_digit returns `true` if the byte is a binary digit (0 or 1) and `false` otherwise.
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// Example: assert byte(`0`) == true
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[inline]
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pub fn (c byte) is_bin_digit() bool {
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return c == `0` || c == `1`
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}
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// is_letter returns `true` if the byte is in range a-z or A-Z and `false` otherwise.
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// Example: assert byte(`V`) == true
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[inline]
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pub fn (c byte) is_letter() bool {
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return (c >= `a` && c <= `z`) || (c >= `A` && c <= `Z`)
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}
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// is_alnum returns `true` if the byte is in range a-z, A-Z, 0-9 and `false` otherwise.
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// Example: assert byte(`V`) == true
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[inline]
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pub fn (c byte) is_alnum() bool {
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return (c >= `a` && c <= `z`) || (c >= `A` && c <= `Z`) || (c >= `0` && c <= `9`)
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}
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// is_capital returns `true`, if the byte is a Latin capital letter.
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// Example: assert `H`.is_capital() == true
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// Example: assert 'h`.is_capital() == false
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[inline]
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pub fn (c byte) is_capital() bool {
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return c >= `A` && c <= `Z`
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}
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// str_escaped returns the contents of `byte` as an escaped `string`.
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// Example: assert byte(0).str_escaped() == r'`\0`'
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pub fn (b byte) str_escaped() string {
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mut str := ''
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match b {
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0 { str = r'`\0`' }
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7 { str = r'`\a`' }
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8 { str = r'`\b`' }
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9 { str = r'`\t`' }
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10 { str = r'`\n`' }
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11 { str = r'`\v`' }
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12 { str = r'`\f`' }
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13 { str = r'`\r`' }
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27 { str = r'`\e`' }
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32...126 { str = b.ascii_str() }
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else { str = '0x' + b.hex() }
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}
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return str
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}
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