| 1 | /* |
| 2 | * A safer saner malloc, for careless programmers |
| 3 | * $Revision: 6.8 $ |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <curses.h> |
| 8 | #include "sc.h" |
| 9 | |
| 10 | extern char *malloc(); |
| 11 | |
| 12 | #ifdef SYSV3 |
| 13 | extern void free(); |
| 14 | extern void exit(); |
| 15 | #endif |
| 16 | |
| 17 | char * |
| 18 | xmalloc(n) |
| 19 | unsigned n; |
| 20 | { |
| 21 | register char *ptr; |
| 22 | |
| 23 | if ((ptr = malloc(n + sizeof(double))) == NULL) |
| 24 | fatal("xmalloc: no memory"); |
| 25 | *((int *) ptr) = 12345; /* magic number */ |
| 26 | return(ptr + sizeof(double)); |
| 27 | } |
| 28 | |
| 29 | xfree(p) |
| 30 | char *p; |
| 31 | { |
| 32 | if (p == NULL) |
| 33 | fatal("xfree: NULL"); |
| 34 | p -= sizeof(double); |
| 35 | if (*((int *) p) != 12345) |
| 36 | fatal("xfree: storage not malloc'ed"); |
| 37 | free(p); |
| 38 | } |
| 39 | |
| 40 | fatal(str) |
| 41 | char *str; |
| 42 | { |
| 43 | deraw(); |
| 44 | (void) fprintf(stderr,"%s\n", str); |
| 45 | exit(1); |
| 46 | } |