| [18] | 1 | /* strtol.c (emx+gcc) -- Copyright (c) 1990-1996 by Eberhard Mattes */
|
|---|
| 2 |
|
|---|
| 3 | #include <stdlib.h>
|
|---|
| 4 | #include <limits.h>
|
|---|
| 5 |
|
|---|
| 6 | #define UTYPE unsigned long
|
|---|
| 7 | #define NAME simple_strtoul
|
|---|
| 8 | #define TYPE unsigned long
|
|---|
| 9 | #define MAX ULONG_MAX
|
|---|
| 10 | #define isspace(a) (a == ' ')
|
|---|
| 11 |
|
|---|
| 12 | /** isdigit(c) returns true if c is decimal digit */
|
|---|
| 13 | int isdigit1(char c)
|
|---|
| 14 | {
|
|---|
| 15 | if (c >= ' ' && c <= '9')
|
|---|
| 16 | return 1;
|
|---|
| 17 | return 0;
|
|---|
| 18 | }
|
|---|
| 19 |
|
|---|
| 20 | /* $Id: isalpha.c,v 1.3 1999/03/08 07:33:54 gernot Exp $ */
|
|---|
| 21 | /** isalpha(c) returns true if c is alphabetic */
|
|---|
| 22 | int isalpha1(char c)
|
|---|
| 23 | {
|
|---|
| 24 | if (c >= 'a' && c <= 'z')
|
|---|
| 25 | return 1;
|
|---|
| 26 | if (c >= 'A' && c <= 'Z')
|
|---|
| 27 | return 1;
|
|---|
| 28 | return 0;
|
|---|
| 29 | }
|
|---|
| 30 |
|
|---|
| 31 | /* $Id: isalnum.c,v 1.3 1999/03/08 07:33:54 gernot Exp $ */
|
|---|
| 32 | /** isalnum(c) returns true if c is alphanumeric */
|
|---|
| 33 | int isalnum1(char c)
|
|---|
| 34 | {
|
|---|
| 35 | if (isalpha1(c))
|
|---|
| 36 | return 1;
|
|---|
| 37 | if (isdigit1(c))
|
|---|
| 38 | return 1;
|
|---|
| 39 | return 0;
|
|---|
| 40 | }
|
|---|
| 41 |
|
|---|
| 42 | TYPE NAME (const char *string, char **end_ptr, int radix)
|
|---|
| 43 | {
|
|---|
| 44 | const unsigned char *s;
|
|---|
| 45 | char neg;
|
|---|
| 46 | TYPE result;
|
|---|
| 47 |
|
|---|
| 48 | s = string;
|
|---|
| 49 | while (isspace (*s))
|
|---|
| 50 | ++s;
|
|---|
| 51 |
|
|---|
| 52 | neg = 0;
|
|---|
| 53 | if (*s == '-')
|
|---|
| 54 | {
|
|---|
| 55 | neg = 1; ++s;
|
|---|
| 56 | }
|
|---|
| 57 | else if (*s == '+')
|
|---|
| 58 | ++s;
|
|---|
| 59 |
|
|---|
| 60 | if ((radix == 0 || radix == 16) && s[0] == '0'
|
|---|
| 61 | && (s[1] == 'x' || s[1] == 'X'))
|
|---|
| 62 | {
|
|---|
| 63 | radix = 16; s += 2;
|
|---|
| 64 | }
|
|---|
| 65 | if (radix == 0)
|
|---|
| 66 | radix = (s[0] == '0' ? 8 : 10);
|
|---|
| 67 |
|
|---|
| 68 | result = 0; /* Keep the compiler happy */
|
|---|
| 69 | if (radix >= 2 && radix <= 36)
|
|---|
| 70 | {
|
|---|
| 71 | UTYPE n, max1, max2, lim;
|
|---|
| 72 | enum {no_number, ok, overflow} state;
|
|---|
| 73 | unsigned char c;
|
|---|
| 74 |
|
|---|
| 75 | lim = MAX;
|
|---|
| 76 | max1 = lim / radix;
|
|---|
| 77 | max2 = lim - max1 * radix;
|
|---|
| 78 | n = 0; state = no_number;
|
|---|
| 79 | for (;;)
|
|---|
| 80 | {
|
|---|
| 81 | c = *s;
|
|---|
| 82 | if (c >= '0' && c <= '9')
|
|---|
| 83 | c = c - '0';
|
|---|
| 84 | else if (c >= 'A' && c <= 'Z')
|
|---|
| 85 | c = c - 'A' + 10;
|
|---|
| 86 | else if (c >= 'a' && c <= 'z')
|
|---|
| 87 | c = c - 'a' + 10;
|
|---|
| 88 | else
|
|---|
| 89 | break;
|
|---|
| 90 | if (c >= radix)
|
|---|
| 91 | break;
|
|---|
| 92 | if (n >= max1 && (n > max1 || (UTYPE)c > max2))
|
|---|
| 93 | state = overflow;
|
|---|
| 94 | if (state != overflow)
|
|---|
| 95 | {
|
|---|
| 96 | n = n * radix + (UTYPE)c;
|
|---|
| 97 | state = ok;
|
|---|
| 98 | }
|
|---|
| 99 | ++s;
|
|---|
| 100 | }
|
|---|
| 101 | switch (state)
|
|---|
| 102 | {
|
|---|
| 103 | case no_number:
|
|---|
| 104 | result = 0;
|
|---|
| 105 | s = string;
|
|---|
| 106 | /* Don't set errno!? */
|
|---|
| 107 | break;
|
|---|
| 108 | case ok:
|
|---|
| 109 | result = (neg ? -n : n);
|
|---|
| 110 | break;
|
|---|
| 111 | case overflow:
|
|---|
| 112 | result = MAX;
|
|---|
| 113 | break;
|
|---|
| 114 | }
|
|---|
| 115 | }
|
|---|
| 116 | else
|
|---|
| 117 | {
|
|---|
| 118 | result = 0;
|
|---|
| 119 | }
|
|---|
| 120 | if (end_ptr != NULL)
|
|---|
| 121 | *end_ptr = (char *)s;
|
|---|
| 122 | return result;
|
|---|
| 123 | }
|
|---|
