Task: Text processing_2

C: #include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

typedef struct { const char *s; int ln, bad; } rec_t;
int cmp_rec(const void *aa, const void *bb)
{
	const rec_t *a = aa, *b = bb;
	return a->s == b->s ? 0 : !a->s ? 1 : !b->s ? -1 : strncmp(a->s, b->s, 10);
}

int read_file(const char *fn)
{
	int fd = open(fn, O_RDONLY);
	if (fd == -1) return 0;

	struct stat s;
	fstat(fd, &s);

	char *txt = malloc(s.st_size);
	read(fd, txt, s.st_size);
	close(fd);

	int i, j, lines = 0, k, di, bad;
	for (i = lines = 0; i < s.st_size; i++)
		if (txt[i] == '\n') {
			txt[i] = '\0';
			lines++;
		}

	rec_t *rec = calloc(sizeof(rec_t), lines);
	const char *ptr, *end;
	rec[0].s = txt;
	rec[0].ln = 1;
	for (i = 0; i < lines; i++) {
		if (i + 1 < lines) {
			rec[i + 1].s = rec[i].s + strlen(rec[i].s) + 1;
			rec[i + 1].ln = i + 2;
		}
		if (sscanf(rec[i].s, "%4d-%2d-%2d", &di, &di, &di) != 3) {
			printf("bad line %d: %s\n", i, rec[i].s);
			rec[i].s = 0;
			continue;
		}
		ptr = rec[i].s + 10;

		for (j = k = 0; j < 25; j++) {
			if (!strtod(ptr, (char**)&end) && end == ptr) break;
			k++, ptr = end;
			if (!(di = strtol(ptr, (char**)&end, 10)) && end == ptr) break;
			k++, ptr = end;
			if (di < 1) rec[i].bad = 1;
		}

		if (k != 48) {
			printf("bad format at line %d: %s\n", i, rec[i].s);
			rec[i].s = 0;
		}
	}

	qsort(rec, lines, sizeof(rec_t), cmp_rec);
	for (i = 1, bad = rec[0].bad, j = 0; i < lines && rec[i].s; i++) {
		if (rec[i].bad) bad++;
		if (strncmp(rec[i].s, rec[j].s, 10)) {
			j = i;
		} else
			printf("dup line %d: %.10s\n", rec[i].ln, rec[i].s);
	}

	free(rec);
	free(txt);
	printf("\n%d out %d lines good\n", lines - bad, lines);
	return 0;
}

int main()
{
	read_file("readings.txt");
	return 0;
}









COBOL:        IDENTIFICATION DIVISION.
       PROGRAM-ID. text-processing-2.

       ENVIRONMENT DIVISION.
       INPUT-OUTPUT SECTION.
       FILE-CONTROL.
           SELECT readings ASSIGN Input-File-Path
               ORGANIZATION LINE SEQUENTIAL
               FILE STATUS file-status.
       
       DATA DIVISION.
       FILE SECTION.
       FD  readings.
       01  reading-record.
           03  date-stamp          PIC X(10).
           03  FILLER              PIC X.
           03  input-data          PIC X(300).

       LOCAL-STORAGE SECTION.
       78  Input-File-Path         VALUE "readings.txt".
       78  Num-Data-Points         VALUE 48.

       01  file-status             PIC XX.

       01  current-line            PIC 9(5).

       01  num-date-stamps-read    PIC 9(5).
       01  read-date-stamps-area.
           03  read-date-stamps    PIC X(10) OCCURS 1 TO 10000 TIMES
                                   DEPENDING ON num-date-stamps-read
                                   INDEXED BY date-stamp-idx.

       01  offset                  PIC 999.
       01  data-len                PIC 999.
       01  data-flag               PIC X.
           88  data-not-found      VALUE "N".

       01  data-field              PIC X(25).

       01  i                       PIC 99.

       01  num-good-readings       PIC 9(5).

       01  reading-flag            PIC X.
           88 bad-reading          VALUE "B".

       01  delim                   PIC X.

       PROCEDURE DIVISION.
       DECLARATIVES.
       readings-error SECTION.
           USE AFTER ERROR ON readings

           DISPLAY "An error occurred while using " Input-File-Path
           DISPLAY "Error code " file-status
           DISPLAY "The program will terminate."

           CLOSE readings
           GOBACK
           .
       END DECLARATIVES.

       main-line.
           OPEN INPUT readings

           
           PERFORM FOREVER
               READ readings
                   AT END
                       EXIT PERFORM
               END-READ

               ADD 1 TO current-line

               IF reading-record = SPACES
                   DISPLAY "Line " current-line " is blank."
                   EXIT PERFORM CYCLE
               END-IF

               PERFORM check-duplicate-date-stamp

               
               
               INITIALIZE offset, reading-flag, data-flag
               PERFORM VARYING i FROM 1 BY 1 UNTIL Num-Data-Points < i
                   PERFORM get-next-field
                   IF data-not-found
                       DISPLAY "Line " current-line " has missing "
                           "fields."
                       SET bad-reading TO TRUE
                       EXIT PERFORM
                   END-IF

                   
                   IF FUNCTION MOD(i, 2) = 0 AND NOT bad-reading
                       IF FUNCTION NUMVAL(data-field) <= 0
                           SET bad-reading TO TRUE
                       END-IF
                   END-IF

                   ADD data-len TO offset
               END-PERFORM

               IF NOT bad-reading
                   ADD 1 TO num-good-readings
               END-IF
           END-PERFORM

           CLOSE readings

           
           DISPLAY SPACE
           DISPLAY current-line " lines read."
           DISPLAY num-good-readings " have good readings for all "
               "instruments."

           GOBACK
           .
       check-duplicate-date-stamp.
           SEARCH read-date-stamps
               AT END
                   ADD 1 TO num-date-stamps-read
                   MOVE date-stamp
                       TO read-date-stamps (num-date-stamps-read)

               WHEN read-date-stamps (date-stamp-idx) = date-stamp
                   DISPLAY "Date " date-stamp " is duplicated at "
                       "line " current-line "."
           END-SEARCH
           .
       get-next-field.
           INSPECT input-data (offset:) TALLYING offset
               FOR LEADING X"09"

           
           MOVE X"09" TO delim
           PERFORM find-num-chars-before-delim

           
           IF FUNCTION SUM(data-len, offset) > 300
               
               
               MOVE SPACE TO delim
               PERFORM find-num-chars-before-delim

               IF FUNCTION SUM(data-len, offset) > 300
                   SET data-not-found TO TRUE
                   EXIT PARAGRAPH
               END-IF
           END-IF

           IF data-len = 0
               SET data-not-found TO TRUE
               EXIT PARAGRAPH
           END-IF

           MOVE input-data (offset:data-len) TO data-field
           .
       find-num-chars-before-delim.
           INITIALIZE data-len
           INSPECT input-data (offset:) TALLYING data-len
               FOR CHARACTERS BEFORE delim
           .