mirror of
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141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/*
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* SORT - reads line of a file and sorts them in order
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* Copyright 1995 Jim Lynch
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*
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* Adapted for ReactOS
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <malloc.h>
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#define MAXRECORDS 65536 /* maximum number of records that can be
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* sorted */
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#define MAXLEN 4095 /* maximum record length */
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int rev; /* reverse flag */
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int help; /* help flag */
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int sortcol; /* sort column */
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int err = 0; /* error counter */
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int
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cmpr(const void *a, const void *b)
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{
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char *A, *B;
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A = *(char **) a;
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B = *(char **) b;
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if (sortcol > 0) {
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if (strlen(A) > sortcol)
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A += sortcol;
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else
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A = "";
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if (strlen(B) > sortcol)
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B += sortcol;
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else
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B = "";
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}
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if (!rev)
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return strcmp(A, B);
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else
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return strcmp(B, A);
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}
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void
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usage(void)
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{
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fputs("SORT\n", stderr);
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fputs("Sorts input and writes output to a file, console or a device.\n", stderr);
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if (err)
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fputs("Invalid parameter\n", stderr);
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fputs(" SORT [options] < [drive:1][path1]file1 > [drive2:][path2]file2\n", stderr);
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fputs(" Command | SORT [options] > [drive:][path]file\n", stderr);
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fputs(" Options:\n", stderr);
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fputs(" /R Reverse order\n", stderr);
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fputs(" /+n Start sorting with column n\n", stderr);
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fputs(" /? Help\n", stderr);
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}
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int main(int argc, char **argv)
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{
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char temp[MAXLEN + 1];
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char **list;
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char *cp; /* option character pointer */
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int nr;
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int i;
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sortcol = 0;
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rev = 0;
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while (--argc) {
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if (*(cp = *++argv) == '/') {
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switch (cp[1]) {
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case 'R':
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case 'r':
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rev = 1;
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break;
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case '?':
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case 'h':
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case 'H':
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help = 1;
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break;
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case '+':
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sortcol = atoi(cp + 1);
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if (sortcol)
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sortcol--;
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break;
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default:
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err++;
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}
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}
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}
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if (err || help) {
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usage();
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exit(1);
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}
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list = (char **) malloc(MAXRECORDS * sizeof(char *));
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if (list == NULL) {
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fputs("SORT: Insufficient memory\n", stderr);
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exit(3);
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}
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for (nr = 0; nr < MAXRECORDS; nr++) {
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if (fgets(temp, MAXLEN, stdin) == NULL)
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break;
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if(strlen(temp))
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temp[strlen(temp)-1]='\0';
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list[nr] = (char *) malloc(strlen(temp) + 1);
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if (list[nr] == NULL) {
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fputs("SORT: Insufficient memory\n", stderr);
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exit(3);
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}
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strcpy(list[nr], temp);
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}
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if (nr == MAXRECORDS) {
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fputs("SORT: number of records exceeds maximum\n", stderr);
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exit(4);
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}
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qsort((void *) list, nr, sizeof(char *), cmpr);
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for (i = 0; i < nr; i++) {
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fputs(list[i], stdout);
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fputs("\n",stdout);
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}
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return 0;
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}
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/* EOF */
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