1 #if _MSC_VERS <= 1300
2 #include "php_strtoi64.h"
3 /*
4 From APR, apr_strings.c
5 See http://www.apache.org/licenses/LICENSE-2.0
6 */
7
_strtoi64(const char * nptr,char ** endptr,int base)8 PHPAPI int64_t _strtoi64(const char *nptr, char **endptr, int base)
9 {
10 const char *s;
11 int64_t acc;
12 int64_t val;
13 int neg, any;
14 char c;
15
16 /*
17 * Skip white space and pick up leading +/- sign if any.
18 * If base is 0, allow 0x for hex and 0 for octal, else
19 * assume decimal; if base is already 16, allow 0x.
20 */
21 s = nptr;
22 do {
23 c = *s++;
24 } while (isspace((unsigned char)c));
25 if (c == '-') {
26 neg = 1;
27 c = *s++;
28 } else {
29 neg = 0;
30 if (c == '+') {
31 c = *s++;
32 }
33 }
34
35 if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) {
36 c = s[1];
37 s += 2;
38 base = 16;
39 }
40 if (base == 0) {
41 base = c == '0' ? 8 : 10;
42 }
43 acc = any = 0;
44 if (base < 2 || base > 36) {
45 errno = EINVAL;
46 if (endptr != NULL) {
47 *endptr = (char *)(any ? s - 1 : nptr);
48 }
49 return acc;
50 }
51
52 /* The classic bsd implementation requires div/mod operators
53 * to compute a cutoff. Benchmarking proves that iss very, very
54 * evil to some 32 bit processors. Instead, look for underflow
55 * in both the mult and add/sub operation. Unlike the bsd impl,
56 * we also work strictly in a signed int64 word as we haven't
57 * implemented the unsigned type in win32.
58 *
59 * Set 'any' if any `digits' consumed; make it negative to indicate
60 * overflow.
61 */
62 val = 0;
63 for ( ; ; c = *s++) {
64 if (c >= '0' && c <= '9')
65 c -= '0';
66
67 #if (('Z' - 'A') == 25)
68 else if (c >= 'A' && c <= 'Z')
69 c -= 'A' - 10;
70 else if (c >= 'a' && c <= 'z')
71 c -= 'a' - 10;
72 #elif APR_CHARSET_EBCDIC
73 else if (c >= 'A' && c <= 'I')
74 c -= 'A' - 10;
75 else if (c >= 'J' && c <= 'R')
76 c -= 'J' - 19;
77 else if (c >= 'S' && c <= 'Z')
78 c -= 'S' - 28;
79 else if (c >= 'a' && c <= 'i')
80 c -= 'a' - 10;
81 else if (c >= 'j' && c <= 'r')
82 c -= 'j' - 19;
83 else if (c >= 's' && c <= 'z')
84 c -= 'z' - 28;
85 #else
86 # error "CANNOT COMPILE apr_strtoi64(), only ASCII and EBCDIC supported"
87 #endif
88 else {
89 break;
90 }
91
92 if (c >= base) {
93 break;
94 }
95
96 val *= base;
97 if ( (any < 0) /* already noted an over/under flow - short circuit */
98 || (neg && (val > acc || (val -= c) > acc)) /* underflow */
99 || (val < acc || (val += c) < acc)) { /* overflow */
100 any = -1; /* once noted, over/underflows never go away */
101 #ifdef APR_STRTOI64_OVERFLOW_IS_BAD_CHAR
102 break;
103 #endif
104 } else {
105 acc = val;
106 any = 1;
107 }
108 }
109
110 if (any < 0) {
111 acc = neg ? INT64_MIN : INT64_MAX;
112 errno = ERANGE;
113 } else if (!any) {
114 errno = EINVAL;
115 }
116
117 if (endptr != NULL) {
118 *endptr = (char *)(any ? s - 1 : nptr);
119 }
120 return (acc);
121 }
122 #endif
123
