projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 6c09e8c3 KB |
1 | /* |
| 2 | * Copyright (c) 1988 Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms are permitted | |
| 6 | * provided that the above copyright notice and this paragraph are | |
| 7 | * duplicated in all such forms and that any documentation, | |
| 8 | * advertising materials, and other materials related to such | |
| 9 | * distribution and use acknowledge that the software was developed | |
| 10 | * by the University of California, Berkeley. The name of the | |
| 11 | * University may not be used to endorse or promote products derived | |
| 12 | * from this software without specific prior written permission. | |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 16 | */ | |
| 17 | ||
| 2ce81398 | 18 | #if defined(LIBC_SCCS) && !defined(lint) |
| 6c09e8c3 KB |
19 | static char sccsid[] = "@(#)atol.c 5.3 (Berkeley) %G%"; |
| 20 | #endif /* LIBC_SCCS and not lint */ | |
| 21 | ||
| 22 | #include <ctype.h> | |
| b8f253e8 | 23 | |
| c009c478 | 24 | long |
| 6c09e8c3 KB |
25 | atol(ascii) |
| 26 | register char *ascii; | |
| c009c478 | 27 | { |
| 6c09e8c3 KB |
28 | register long val; |
| 29 | int negative = 0; | |
| c009c478 | 30 | |
| 6c09e8c3 KB |
31 | for (; isascii(*ascii) && isspace(*ascii); ++ascii); |
| 32 | if (*ascii == '+') | |
| 33 | ++ascii; | |
| 34 | else if (*ascii == '-') { | |
| 35 | ++ascii; | |
| 36 | negative = 1; | |
| c009c478 | 37 | } |
| 6c09e8c3 KB |
38 | for (val = 0; isascii(*ascii) && isdigit(*ascii); ++ascii) |
| 39 | val = val * 10 + *ascii - '0'; | |
| 40 | return(negative ? -val : val); | |
| c009c478 | 41 | } |