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/##
Copyright 2021 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({}charp 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 (~{}charp a, b) [{}charp]
;{}charp out = ""
/; loop (int i = 0; i < len a`) [i++]
;out.append(a`{i})
;/
/; loop (int i = 0; i < len b`) [i++]
;out.append(b`{i})
;/
;return out
;/
/; reverse_string({}charp str) [{}charp]
;{}charp out = ""
/; loop (int i = len str; i > 0) [i = i - 1]
;out.append(str{i - 1})
;/
;return out
;/
/; is_whitespace (charp c) [bool]
;return c == '\t' || c == '\n' || c == ' '
;/
/; is_digit (charp c) [bool]
;return c !< '0' && c !> '9'
;/
/; is_alpha (charp c) [bool]
;bool low = c !< 'A' && c !> 'Z', high = c !< 'a' && c >! 'z'
;return low || high
;/
/; digit_to_char(int i) [charp]
;charp out = '0'
;out = out + (i % 10)
;return out
;/
/; string_from_int(int i) [{}charp]
;{}charp c = ""
/; if (i < 0)
;c = "-"
;i = -i
;/
;c.append(digit_to_char(i))
;i = i / 10
/; loop (i !== 0) [i = i / 10]
;c.append(digit_to_char(i))
;/
;return reverse_string(c)
;/
/; int_from_string ({}charp str) [int]
;bool inv = str{0} == '-'
;int out = 0
/; loop ()
;/
/; if (inv)
;out = -out
;/
;return out
;/
/; get_escape_code (charp c) [charp]
/; 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 ({}charp c) [charp]
/;
;/
;/
/; unquote_char ({}charp c) [charp]
/; if (c{1} == '\\')
/; if (c{2} == 'x')
;return 0
;/
;return get_escape_code(c{2})
;/
;return c{1}
;/
/; unquote_string ({}charp str) [{}charp]
;/
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