(*
BSD 2-Clause License
Copyright (c) 2018, 2019, Anton Krotov
All rights reserved.
*)
MODULE STRINGS;
IMPORT UTILS;
PROCEDURE append* (VAR s1: ARRAY OF CHAR; s2: ARRAY OF CHAR);
VAR
n1, n2, i, j: INTEGER;
BEGIN
n1 := LENGTH(s1);
n2 := LENGTH(s2);
ASSERT(n1 + n2 < LEN(s1));
i := 0;
j := n1;
WHILE i < n2 DO
s1[j] := s2[i];
INC(i);
INC(j)
END;
s1[j] := 0X
END append;
PROCEDURE reverse* (VAR s: ARRAY OF CHAR);
VAR
i, j: INTEGER;
a, b: CHAR;
BEGIN
i := 0;
j := LENGTH(s) - 1;
WHILE i < j DO
a := s[i];
b := s[j];
s[i] := b;
s[j] := a;
INC(i);
DEC(j)
END
END reverse;
PROCEDURE IntToStr* (x: INTEGER; VAR str: ARRAY OF CHAR);
VAR
i, a: INTEGER;
minus: BOOLEAN;
BEGIN
IF x = UTILS.minint THEN
IF UTILS.bit_depth = 32 THEN
COPY("-2147483648", str)
ELSIF UTILS.bit_depth = 64 THEN
COPY("-9223372036854775808", str)
END
ELSE
minus := x < 0;
IF minus THEN
x := -x
END;
i := 0;
a := 0;
REPEAT
str[i] := CHR(x MOD 10 + ORD("0"));
x := x DIV 10;
INC(i)
UNTIL x = 0;
IF minus THEN
str[i] := "-";
INC(i)
END;
str[i] := 0X;
reverse(str)
END
END IntToStr;
PROCEDURE copy* (src: ARRAY OF CHAR; VAR dst: ARRAY OF CHAR; spos, dpos, count: INTEGER);
BEGIN
WHILE count > 0 DO
dst[dpos] := src[spos];
INC(spos);
INC(dpos);
DEC(count)
END
END copy;
PROCEDURE search* (s: ARRAY OF CHAR; VAR pos: INTEGER; c: CHAR; forward: BOOLEAN);
VAR
length: INTEGER;
BEGIN
length := LENGTH(s);
IF (0 <= pos) & (pos < length) THEN
IF forward THEN
WHILE (pos < length) & (s[pos] # c) DO
INC(pos)
END;
IF pos = length THEN
pos := -1
END
ELSE
WHILE (pos >= 0) & (s[pos] # c) DO
DEC(pos)
END
END
ELSE
pos := -1
END
END search;
PROCEDURE letter* (c: CHAR): BOOLEAN;
RETURN ("a" <= c) & (c <= "z") OR ("A" <= c) & (c <= "Z") OR (c = "_")
END letter;
PROCEDURE digit* (c: CHAR): BOOLEAN;
RETURN ("0" <= c) & (c <= "9")
END digit;
PROCEDURE hexdigit* (c: CHAR): BOOLEAN;
RETURN ("0" <= c) & (c <= "9") OR ("A" <= c) & (c <= "F")
END hexdigit;
PROCEDURE space* (c: CHAR): BOOLEAN;
RETURN (0X < c) & (c <= 20X)
END space;
PROCEDURE StrToInt* (str: ARRAY OF CHAR; VAR x: INTEGER): BOOLEAN;
VAR
i, k: INTEGER;
res: BOOLEAN;
BEGIN
res := TRUE;
i := 0;
x := 0;
k := LENGTH(str);
WHILE i < k DO
IF digit(str[i]) THEN
x := x * 10 + ORD(str[i]) - ORD("0")
ELSE
i := k;
res := FALSE
END;
INC(i)
END
RETURN res
END StrToInt;
PROCEDURE CheckVer (str: ARRAY OF CHAR): BOOLEAN;
VAR
i, k: INTEGER;
res: BOOLEAN;
BEGIN
k := LENGTH(str);
res := k < LEN(str);
IF res & digit(str[0]) THEN
i := 0;
WHILE (i < k) & digit(str[i]) DO
INC(i)
END;
IF (i < k) & (str[i] = ".") THEN
INC(i);
IF i < k THEN
WHILE (i < k) & digit(str[i]) DO
INC(i)
END
ELSE
res := FALSE
END
ELSE
res := FALSE
END;
res := res & (i = k)
ELSE
res := FALSE
END
RETURN res
END CheckVer;
PROCEDURE StrToVer* (str: ARRAY OF CHAR; VAR major, minor: INTEGER): BOOLEAN;
VAR
i: INTEGER;
res: BOOLEAN;
BEGIN
res := CheckVer(str);
IF res THEN
i := 0;
minor := 0;
major := 0;
WHILE digit(str[i]) DO
major := major * 10 + ORD(str[i]) - ORD("0");
INC(i)
END;
INC(i);
WHILE digit(str[i]) DO
minor := minor * 10 + ORD(str[i]) - ORD("0");
INC(i)
END
END
RETURN res
END StrToVer;
PROCEDURE Utf8To16* (src: ARRAY OF CHAR; VAR dst: ARRAY OF WCHAR): INTEGER;
VAR
i, j, u, srclen, dstlen: INTEGER;
c: CHAR;
BEGIN
srclen := LEN(src);
dstlen := LEN(dst);
i := 0;
j := 0;
WHILE (i < srclen) & (j < dstlen) & (src[i] # 0X) DO
c := src[i];
CASE c OF
|00X..7FX:
u := ORD(c)
|0C1X..0DFX:
u := LSL(ORD(c) - 0C0H, 6);
IF i + 1 < srclen THEN
INC(i);
INC(u, ORD(BITS(ORD(src[i])) * {0..5}))
END
|0E1X..0EFX:
u := LSL(ORD(c) - 0E0H, 12);
IF i + 1 < srclen THEN
INC(i);
INC(u, ORD(BITS(ORD(src[i])) * {0..5}) * 64)
END;
IF i + 1 < srclen THEN
INC(i);
INC(u, ORD(BITS(ORD(src[i])) * {0..5}))
END
(*
|0F1X..0F7X:
|0F9X..0FBX:
|0FDX:
*)
ELSE
END;
INC(i);
dst[j] := WCHR(u);
INC(j)
END;
IF j < dstlen THEN
dst[j] := WCHR(0)
END
RETURN j
END Utf8To16;
END STRINGS.