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/##
Copyright 2021-2022 Kyle Gunger
This file is licensed under the CDDL 1.0 (the License)
and may only be used in accordance with the License.
You should have received a copy of the License with this
software/source code. If you did not, a copy can be found
at the following URL:
https://opensource.org/licenses/CDDL-1.0
THIS SOFTWARE/SOURCE CODE IS PROVIDED "AS IS" WITH NO
WARRANTY, GUARANTEE, OR CLAIM OF FITNESS FOR ANY PURPOSE
EXPRESS OR IMPLIED
#/
/# util.tnsl
Utility functions that may be useful in many places.
#/
/; string_equate({}uint8 s1, s2) [bool]
/; if (len s1 !== len s2)
;return false
;/
/; loop (int i = 0; i < len s1) [i++]
/; if (s1{i} !== s2{i})
;return false
;/
;/
;return true
;/
/; add_strings (~{}uint8 a, b)
/; loop (int i = 0; i < len b`) [i++]
;a`.append(b`{i})
;/
;/
/; reverse_string({}uint8 str) [{}uint8]
;{}uint8 out = ""
/; loop (int i = len str; i > 0) [i = i - 1]
;out.append(str{i - 1})
;/
;return out
;/
/; is_whitespace (uint8 c) [bool]
;return c == '\t' || c == '\n' || c == ' '
;/
/; is_digit (uint8 c) [bool]
;return c !< '0' && c !> '9'
;/
/; is_alpha (uint8 c) [bool]
;bool low = c !< 'A' && c !> 'Z', high = c !< 'a' && c >! 'z'
;return low || high
;/
/; digit_to_char(int i) [uint8]
;uint8 out = '0'
;out = out + (i % 10)
;return out
;/
/; string_from_int(int i) [{}uint8]
;{}uint8 c = ""
;bool n = false
/; if (i < 0)
;n = true
;i = -i
;/
;c.append(digit_to_char(i))
;i = i / 10
/; loop (i !== 0) [i = i / 10]
;c.append(digit_to_char(i))
;/
/;if (n)
;c.append('-')
;/
;return reverse_string(c)
;/
/; int_from_string ({}uint8 str) [int]
;bool inv = str{0} == '-'
;int out = 0
;int fac = 10
;int i = 0
/; if (inv)
;i++
;/
/; loop (i < len str) [i++]
;out = out * fac
;out = out + str{i} - '0'
;/
/; if (inv)
;out = -out
;/
;return out
;/
/; get_escape_code (uint8 c) [uint8]
/; if (c == '\'')
;return '\''
;; else if (c == '"')
;return '"'
;; else if (c == 'a')
;return '\a'
;; else if (c == 'b')
;return '\b'
;; else if (c == 'e')
;return '\e'
;; else if (c == 'f')
;return '\f'
;; else if (c == 'n')
;return '\n'
;; else if (c == 'r')
;return '\r'
;; else if (c == 't')
;return '\t'
;; else if (c == 'v')
;return '\v'
;/
;return 0
;/
/; parse_hex_code ({}uint8 c) [uint8]
;uint8 out = 0
/; loop (int i = 0; i < len c) [i++]
;out = out * 16
;uint8 tmp = c{i}
/; if (tmp !< 'a')
;tmp = tmp - 'a' + 'A'
;/
/; if (tmp !< '0' && tmp !> '9')
;out = out + tmp - '0'
;; else if (tmp !< 'A' && tmp !> 'F')
;out = out + 10 + (tmp - 'A')
;; else
;break
;/
;/
;return out
;/
/; unquote_char ({}uint8 c) [uint8]
/; if (c{1} == '\\')
/; if (c{2} == 'x')
;{}uint8 d = {c{3}, c{4}}
;return parse_hex_code(d)
;/
;return get_escape_code(c{2})
;/
;return c{1}
;/
/; unquote_string ({}uint8 str) [{}uint8]
;{}uint8 out = ""
;{}uint8 unc = "'"
/; loop (int i = 1; i < len str - 1) [i++]
/; if (str{i} == '\\')
;unc.append('\\')
;unc.append(str{i + 1})
;i++
/; if (str{i} == 'x')
;unc.append(str{i + 1})
;unc.append(str{i + 2})
;i = i + 2
;/
;out.append(unquote_char(unc))
;unc = "'"
;; else
;out.append(str{i})
;/
;/
;return out
;/
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