Rev 3 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
||
| 3 | * Date: 1.6.2000 |
||
| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
||
| 5 | * |
||
| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
||
| 7 | * low-level infrastructure for developing OS kernels and Embedded |
||
| 8 | * Applications; it partially derives from the HARTIK project but it |
||
| 9 | * currently is independently developed. |
||
| 10 | * |
||
| 11 | * OSLib is distributed under GPL License, and some of its code has |
||
| 12 | * been derived from the Linux kernel source; also some important |
||
| 13 | * ideas come from studying the DJGPP go32 extender. |
||
| 14 | * |
||
| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
||
| 16 | * D.J. Delorie and all the other developers who believe in the |
||
| 17 | * freedom of software and ideas. |
||
| 18 | * |
||
| 19 | * For legalese, check out the included GPL license. |
||
| 20 | */ |
||
| 21 | |||
| 22 | #include <ll/i386/stdlib.h> |
||
| 23 | #include <ll/i386/string.h> |
||
| 24 | #include <ll/i386/limits.h> |
||
| 25 | #include <ll/stdarg.h> |
||
| 26 | #include <ll/ctype.h> |
||
| 27 | |||
| 28 | FILE(strtou); |
||
| 29 | |||
| 30 | long unsigned strtou(char *s,int base,char **scan_end) |
||
| 31 | { |
||
| 32 | int value,overflow = 0; |
||
| 33 | long unsigned result = 0,oldresult; |
||
| 34 | /* Skip trailing zeros */ |
||
| 35 | while (*s == '0') s++; |
||
| 36 | if (*s == 'x' && base == 16) { |
||
| 37 | s++; |
||
| 38 | while (*s == '0') s++; |
||
| 39 | } |
||
| 40 | /* Convert number */ |
||
| 41 | while (isnumber(*s,base)) { |
||
| 42 | value = tonumber(*s++); |
||
| 43 | if (value > base || value < 0) return(0); |
||
| 44 | oldresult = result; |
||
| 45 | result *= base; |
||
| 46 | result += value; |
||
| 47 | /* Detect overflow */ |
||
| 48 | if (oldresult > result) overflow = 1; |
||
| 49 | } |
||
| 50 | if (scan_end != 0L) *scan_end = s; |
||
| 51 | if (overflow) result = INT_MAX; |
||
| 52 | return(result); |
||
| 53 | } |
||
| 54 | |||
| 55 |