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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 1621 | fabio | 22 | #include <arch/i386/stdlib.h> |
| 23 | #include <arch/i386/string.h> |
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| 24 | #include <arch/i386/limits.h> |
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| 25 | #include <arch/stdarg.h> |
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| 26 | #include <arch/ctype.h> |
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| 27 | #include <arch/math.h> |
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| 2 | pj | 28 | |
| 29 | FILE(strtoi); |
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| 30 | |||
| 31 | long int strtoi(char *s,int base,char **scan_end) |
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| 32 | { |
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| 33 | int sign,value,overflow = 0; |
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| 34 | long int result = 0,oldresult; |
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| 35 | /* Evaluate sign */ |
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| 36 | if (*s == '-') { |
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| 37 | sign = -1; |
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| 38 | s++; |
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| 39 | } else if (*s == '+') { |
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| 40 | sign = 1; |
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| 41 | s++; |
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| 42 | } |
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| 43 | else sign = 1; |
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| 44 | /* Skip trailing zeros */ |
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| 45 | while (*s == '0') s++; |
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| 46 | /* Convert number */ |
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| 47 | while (isnumber(*s,base)) { |
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| 48 | value = tonumber(*s++); |
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| 49 | if (value > base || value < 0) return(0); |
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| 50 | oldresult = result; |
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| 51 | result *= base; |
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| 52 | result += value; |
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| 53 | /* Detect overflow */ |
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| 54 | if (oldresult > result) overflow = 1; |
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| 55 | } |
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| 56 | if (scan_end != 0L) *scan_end = s; |
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| 57 | if (overflow) result = INT_MAX; |
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| 58 | result *= sign; |
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| 59 | return(result); |
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| 60 | } |