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v/vlib/builtin/js/byte.js.v

97 lines
2.2 KiB
V

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