sort.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

Include dependency graph for sort.c:

Go to the source code of this file.

Macros
#define	MAXRECORDS   65536 /* maximum number of records that can be sorted */
#define	MAXLEN   4095 /* maximum record length */

Functions
int	cmpr (const void *a, const void *b)
void	usage (void)
int	main (int argc, char **argv)

Variables
int	rev
int	help
int	sortcol
int	err = 0

Macro Definition Documentation

MAXLEN

#define MAXLEN   4095 /* maximum record length */

Definition at line 14 of file sort.c.

MAXRECORDS

#define MAXRECORDS   65536 /* maximum number of records that can be sorted */

Definition at line 13 of file sort.c.

Function Documentation

cmpr()

int cmpr	(	const void *	a,
		const void *	b
	)

Definition at line 28 of file sort.c.

{
    char *A, *B;

    A = *(char **) a;
    B = *(char **) b;

    if (sortcol > 0)
    {
        if (strlen(A) > sortcol)
        {
            A += sortcol;
        }
        else
        {
            A = "";
        }
        if (strlen(B) > sortcol)
        {
            B += sortcol;
        }
        else
        {
            B = "";
        }
    }

    if (!rev)
    {
        return strcmp(A, B);
    }
    else
    {
        return strcmp(B, A);
    }
}

Referenced by main().

main()

int main	(	int argc	,
		char **	argv
	)

Definition at line 86 of file sort.c.

{
    char temp[MAXLEN + 1];
    char **list;

    /* Option character pointer */
    char *cp;
    int i, nr;

    sortcol = 0;
    rev = 0;
    while (--argc)
    {
        if (*(cp = *++argv) == '/')
        {
            switch (cp[1])
            {
                case 'R':
                case 'r':
                    rev = 1;
                    break;

                case '?':
                case 'h':
                case 'H':
                    help = 1;
                    break;

                case '+':
                    sortcol = atoi(cp + 1);
                    if (sortcol)
                    {
                        sortcol--;
                    }
                    break;

                default:
                    err++;
            }
        }
    }

    if (err || help)
    {
        usage();
        exit(1);
    }

    list = (char **) malloc(MAXRECORDS * sizeof(char *));
    if (list == NULL)
    {
        fputs("SORT: Insufficient memory\n", stderr);
        exit(3);
    }

    for (nr = 0; nr < MAXRECORDS; nr++)
    {
        if (fgets(temp, MAXLEN, stdin) == NULL)
        {
            break;
        }

        if(strlen(temp))
        {
            temp[strlen(temp) - 1] = '\0';
        }

        list[nr] = (char *) malloc(strlen(temp) + 1);
        if (list[nr] == NULL)
        {
            fputs("SORT: Insufficient memory\n", stderr);

            /* Cleanup memory */
            for (i = 0; i < nr; i++)
            {
                free(list[i]);
            }
            free(list);
            exit(3);
        }

        strcpy(list[nr], temp);
    }

    if (nr == MAXRECORDS)
    {
        fputs("SORT: number of records exceeds maximum\n", stderr);

        /* Cleanup memory */
        for (i = 0; i < nr; i++)
        {
            free(list[i]);
        }
        free(list);

        /* Bail out */
        exit(4);
    }

    qsort((void *)list, nr, sizeof(char *), cmpr);

    for (i = 0; i < nr; i++)
    {
        fputs(list[i], stdout);
        fputs("\n", stdout);
    }

    /* Cleanup memory */
    for (i = 0; i < nr; i++)
    {
        free(list[i]);
    }
    free(list);
    return 0;
}

usage()

void usage

(

void

)

Definition at line 65 of file sort.c.

{
    fputs("SORT\n", stderr);
    fputs("Sorts input and writes output to a file, console or a device.\n",
          stderr);

    if (err)
    {
        fputs("Invalid parameter\n", stderr);
    }

    fputs("    SORT [options] < [drive:1][path1]file1 > [drive2:][path2]file2\n",
          stderr);

    fputs("    Command | SORT [options] > [drive:][path]file\n", stderr);
    fputs("    Options:\n", stderr);
    fputs("    /R   Reverse order\n", stderr);
    fputs("    /+n  Start sorting with column n\n", stderr);
    fputs("    /?   Help\n", stderr);
}

Referenced by main().

Variable Documentation

err

int err = 0

Definition at line 26 of file sort.c.

Referenced by main(), and usage().

help

int help

Definition at line 20 of file sort.c.

Referenced by DIALOG_PAGESETUP_Hook(), main(), MSI_GetFeatureInfo(), MsiGetFeatureInfoA(), MsiGetFeatureInfoW(), ShowHelpWindow(), and test_MsiGetFeatureInfo().

rev

int rev

Definition at line 17 of file sort.c.

Referenced by _test_link_rev(), cmpr(), EDIT_PaintLine(), EDIT_PaintText(), EDIT_WM_Paint(), get_file_rev(), main(), poll_isset(), run_test(), and shorten_bezier_amt().

sortcol

int sortcol

Definition at line 23 of file sort.c.

Referenced by cmpr(), and main().