vipak/stringHelpers.Mod
2017-05-22 22:59:58 +04:00

243 lines
6.3 KiB
Modula-2

MODULE stringHelpers; (*noch 18.5.2017 / 19.5.2017*)
IMPORT Strings := ooc2Strings, Out;
CONST
CR* = 0DX;
LF* = 0AX;
TYPE
pstring* = POINTER TO ARRAY OF CHAR;
pstrings* = POINTER TO ARRAY OF pstring;
(** fills whole array with zeroes, useful when one needs to get several strings which contain characters < ' ' and not necessarily end with 0X *)
PROCEDURE zeroStr*(VAR str: ARRAY OF CHAR);
VAR
i, j : LONGINT;
BEGIN
i := LEN(str);
j := 0;
REPEAT
str[j] := 0X;
INC(j)
UNTIL j = i;
END zeroStr;
PROCEDURE appendLFCR*(VAR str: ARRAY OF CHAR);
VAR
l : INTEGER;
BEGIN
l := Strings.Length(str);
str[l] := LF;
str[l+1] := CR;
str[l+2] := 0X;
END appendLFCR;
PROCEDURE findChar*(ch: CHAR; VAR line: ARRAY OF CHAR; VAR b: BOOLEAN; VAR pos: INTEGER);
VAR
i : INTEGER;
BEGIN
i := -1; pos := -1;
b := FALSE;
REPEAT
INC(i);
IF line[i] = ch THEN b := TRUE; pos := i END;
UNTIL b OR (i = LEN(line) - 1);
END findChar;
(* cuts line, takes the part till the eol *)
PROCEDURE cutLine*(VAR src, dst: ARRAY OF CHAR);
VAR
found: BOOLEAN;
pos : INTEGER;
i : INTEGER;
BEGIN
COPY("", dst);
findChar(LF, src, found, pos);
IF found THEN
i := 0;
REPEAT
dst[i] := src[i];
INC(i);
UNTIL (i = pos) OR (i = LEN(dst)-2);
dst[i] := src[i];
dst[i+1] := 0X
END;
END cutLine;
(* put 0X after eol in the string *)
PROCEDURE terminateLine*(VAR str: ARRAY OF CHAR);
VAR
found: BOOLEAN;
pos : INTEGER;
BEGIN
findChar(LF, str, found, pos);
IF found THEN
IF (pos + 1) < LEN(str) THEN
str[pos + 1] := 0X
END
END;
END terminateLine;
PROCEDURE getTillEOL*(VAR src: ARRAY OF CHAR; spos: INTEGER; VAR dst: ARRAY OF CHAR); (* actually get till any character < ' ' *)
VAR
i, j: INTEGER;
BEGIN
zeroStr(dst);
i := 0;
j := spos+1;
REPEAT
dst[i] := src[i+j];
INC(i);
UNTIL (i+j = Strings.Length(src)) OR (src[i+j] < ' ');
END getTillEOL;
(* get next word starting from spos till the ' ' *)
PROCEDURE getNextWord*(VAR src: ARRAY OF CHAR; spos: INTEGER; VAR dst: ARRAY OF CHAR);
VAR
i, j: INTEGER;
BEGIN
zeroStr(dst);
i := 0;
j := spos+1;
REPEAT
dst[i] := src[i+j];
INC(i);
UNTIL (i+j = Strings.Length(src)) OR (src[i+j] <= ' ');
END getNextWord;
PROCEDURE contains* (VAR line : ARRAY OF CHAR; pattern: ARRAY OF CHAR): BOOLEAN;
VAR
found: BOOLEAN;
pos : INTEGER;
i : INTEGER;
patternLength: INTEGER;
tmpline: POINTER TO ARRAY OF CHAR;
BEGIN
i := 0;
patternLength := Strings.Length(pattern);
NEW(tmpline, patternLength+1);
found := FALSE;
REPEAT
Strings.Extract(line, i, patternLength, tmpline^);
found := Strings.Equal(pattern, tmpline^);
INC(i);
UNTIL found OR (i = LEN(line) - patternLength - 1);
IF found THEN RETURN TRUE ELSE RETURN FALSE END
END contains;
PROCEDURE contains1*(VAR line: ARRAY OF CHAR; pat : ARRAY OF CHAR): BOOLEAN;
VAR
found: BOOLEAN;
pos : INTEGER;
BEGIN
Strings.FindNext(pat, line, 0, found, pos);
IF found THEN RETURN TRUE ELSE RETURN FALSE END
END contains1;
PROCEDURE dumpText*(VAR text: ARRAY OF CHAR);
VAR
i : INTEGER;
BEGIN
i := 0;
REPEAT
Out.Int(i, 3); Out.String(" | ord: "); Out.Int(ORD(text[i]), 15); Out.String(", char: '"); Out.Char(text[i]); Out.Char("'"); Out.Ln;
INC(i)
UNTIL i = LEN(text);
END dumpText;
PROCEDURE dumpTextTill0*(VAR text: ARRAY OF CHAR);
VAR
i : INTEGER;
BEGIN
i := 0;
REPEAT
Out.Int(i, 3); Out.String(" | ord: "); Out.Int(ORD(text[i]), 15); Out.String(", char: '"); Out.Char(text[i]); Out.Char("'"); Out.Ln;
INC(i)
UNTIL (text[i] = 0X) OR (i = LEN(text));
END dumpTextTill0;
PROCEDURE textToPstrings*(VAR text: ARRAY OF CHAR): pstrings;
VAR
i, j, lineNum, start, number: INTEGER;
pstrs: pstrings;
pstr: pstring;
BEGIN
i := 0;
j := 0;
REPEAT
IF text[i] = 0AX THEN INC(j) END;
INC(i);
UNTIL (i = LEN(text)) OR (text[i] = 0X); (* now in j we have count of lines *)
(* and in i we have position of the end of the text *)
NEW(pstrs, j); (*creating ptsrs array with that count *)
lineNum := 0; (* current line number, will inc until j*)
number := 0; (* character index in the text *)
REPEAT (* now we have to fill it line by line *)
WHILE (text[number] = 0AX) OR (text[number] = 0DX) DO INC(number) END;
start := number;
REPEAT
INC(number)
UNTIL (number = LEN(text) - 1) OR (text[number] = 0AX) OR (text[number] = 0DX) OR (text[number] = 0X); (* reached eol *)
NEW(pstr, number - start + 1);
Strings.Extract(text, start, number - start, pstr^);
pstrs^[lineNum] := pstr;
INC(lineNum);
UNTIL (lineNum = j) OR (number = i);
RETURN pstrs
END textToPstrings;
(* IntToStr routine taken from
https://github.com/romiras/Oberon-F-components/blob/master/Ott/Mod/IntStr.cp
and modified to work on 64bit system by dcwbrown,
in order to avoid using oocIntStr, which has many dependencies *)
PROCEDURE Reverse0 (VAR str : ARRAY OF CHAR; start, end : INTEGER);
(* Reverses order of characters in the interval [start..end]. *)
VAR
h : CHAR;
BEGIN
WHILE start < end DO
h := str[start]; str[start] := str[end]; str[end] := h;
INC(start); DEC(end)
END
END Reverse0;
PROCEDURE IntToStr*(int: LONGINT; VAR str: ARRAY OF CHAR);
(* Converts the value of `int' to string form and copies the possibly truncated
result to `str'. *)
VAR
b : ARRAY 21 OF CHAR;
s, e: INTEGER;
maxLength : SHORTINT; (* maximum number of digits representing a LONGINT value *)
BEGIN
IF SIZE(LONGINT) = 4 THEN maxLength := 11 END;
IF SIZE(LONGINT) = 8 THEN maxLength := 20 END;
(* build representation in string 'b' *)
IF int = MIN(LONGINT) THEN (* smallest LONGINT, -int is an overflow *)
IF SIZE(LONGINT) = 4 THEN
b := "-2147483648";
e := 11
ELSE (* SIZE(LONGINT) = 8 *)
b := "-9223372036854775808";
e := 20
END
ELSE
IF int < 0 THEN (* negative sign *)
b[0] := "-"; int := -int; s := 1
ELSE (* no sign *)
s := 0
END;
e := s; (* 's' holds starting position of string *)
REPEAT
b[e] := CHR(int MOD 10+ORD("0"));
int := int DIV 10;
INC(e)
UNTIL int = 0;
b[e] := 0X;
Reverse0(b, s, e-1);
END;
COPY(b, str) (* truncate output if necessary *)
END IntToStr;
END stringHelpers.