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- /* Simple program to test the double list routines */
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- #include <dos.h>
- #include <alloc.h>
- #include "dlist.h"
-
- #define PRINT_LIST
-
- /* A implementation of a macro to peek at a long value (not in DOS.H) */
-
- #define peekl(__segment,__offset) (*((long far*)MK_FP(__segment, __offset)))
-
- void randstr(char *s,int length)
- {
- int i;
-
- for (i = 0; i < length; i++)
- s[i] = 'a' + (char)random('z' - 'a');
- s[i] = '\0';
- }
-
- char *timestr(long time)
- {
- int minutes,seconds,sec100;
- float totalsecs;
- static char str[10];
-
- totalsecs = time / 18.2;
- minutes = (int)totalsecs / 60;
- totalsecs -= minutes * 60;
- seconds = (int)totalsecs;
- sec100 = (int)((totalsecs - seconds) * 100);
- sprintf(str,"%02d:%02d.%02d",minutes,seconds,sec100);
- return str;
- }
-
- void main(void)
- {
- DLIST *list;
- char *s;
- char *p;
- char line[80];
- int i,size,length;
- long start,finish;
-
- printf("Size of list to create: ");
- gets(line);
- size = atoi(line);
- printf("Maximum length of strings: ");
- gets(line);
- length = atoi(line);
-
- printf("\nMemory at start: %lu\n",(unsigned long)coreleft());
- printf("\nCreating list of %d random strings of length %d ...\n\n",size,length);
-
- randomize();
- list = dlst_init();
-
- for (i = 0; i < size; i++) {
- s = dlst_newnode(length+1);
- randstr(s,random(length));
- dlst_insertafter(list,s,DLST_HEAD(list));
- if (i == size/2)
- p = s;
- }
-
- printf("Sorting strings...\n\n");
-
- start = peekl(0x40,0x6C);
- dlst_mergesort(list,strcmp);
- finish = peekl(0x40,0x6C);
-
- printf("Time to sort: %s\n",timestr(finish-start));
-
- #ifdef PRINT_LIST
- for (s = dlst_first(list); s; s = dlst_next(s))
- printf("String: %s\n",s);
- printf("\nList in reverse order:\n\n");
- for (s = dlst_last(list); s; s = dlst_prev(s))
- printf("String: %s\n",s);
-
- dlst_freenode(dlst_deletenext(list,p));
- printf("\n\n");
- for (s = dlst_first(list); s; s = dlst_next(s))
- printf("String: %s\n",s);
- printf("\nList in reverse order:\n\n");
- for (s = dlst_last(list); s; s = dlst_prev(s))
- printf("String: %s\n",s);
- #endif
-
- printf("\nMemory before deleting list: %lu\n",(unsigned long)coreleft());
-
- dlst_kill(list,dlst_freenode);
-
- printf("\nMemory after deleting list: %lu\n",(unsigned long)coreleft());
- }
-