1 /* $NetBSD: _strtol.h,v 1.11 2017/07/06 21:08:44 joerg Exp $ */
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31 * Original version ID:
32 * NetBSD: src/lib/libc/locale/_wcstol.h,v 1.2 2003/08/07 16:43:03 agc Exp
36 * function template for strtol, strtoll and strtoimax.
39 * _FUNCNAME : function name
41 * __INT_MIN : lower limit of the return type
42 * __INT_MAX : upper limit of the return type
44 #if defined(_KERNEL) || defined(_STANDALONE) || defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY)
46 _FUNCNAME(const char *nptr, char **endptr, int base)
49 #include "setlocale_local.h"
50 #define INT_FUNCNAME_(pre, name, post) pre ## name ## post
51 #define INT_FUNCNAME(pre, name, post) INT_FUNCNAME_(pre, name, post)
54 INT_FUNCNAME(_int_, _FUNCNAME, _l)(const char *nptr, char **endptr,
55 int base, locale_t loc)
61 int i, neg, any, cutlim;
63 _DIAGASSERT(nptr != NULL);
64 /* endptr may be NULL */
66 /* check base value */
67 if (base && (base < 2 || base > 36)) {
68 #if !defined(_KERNEL) && !defined(_STANDALONE)
71 /* LINTED interface specification */
72 *endptr = __UNCONST(nptr);
75 panic("%s: invalid base %d", __func__, base);
80 * Skip white space and pick up leading +/- sign if any.
81 * If base is 0, allow 0x for hex and 0 for octal, else
82 * assume decimal; if base is already 16, allow 0x.
85 #if defined(_KERNEL) || defined(_STANDALONE) || \
86 defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY)
93 } while (isspace_l(c, loc));
103 if ((base == 0 || base == 16) &&
104 c == '0' && (*s == 'x' || *s == 'X') &&
105 ((s[1] >= '0' && s[1] <= '9') ||
106 (s[1] >= 'a' && s[1] <= 'f') ||
107 (s[1] >= 'A' && s[1] <= 'F'))) {
112 } else if ((base == 0 || base == 2) &&
113 c == '0' && (*s == 'b' || *s == 'B') &&
114 (s[1] >= '0' && s[1] <= '1')) {
119 } else if (base == 0)
120 base = (c == '0' ? 8 : 10);
123 * Compute the cutoff value between legal numbers and illegal
124 * numbers. That is the largest legal value, divided by the
125 * base. An input number that is greater than this value, if
126 * followed by a legal input character, is too big. One that
127 * is equal to this value may be valid or not; the limit
128 * between valid and invalid numbers is then based on the last
129 * digit. For instance, if the range for longs is
130 * [-2147483648..2147483647] and the input base is 10,
131 * cutoff will be set to 214748364 and cutlim to either
132 * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
133 * a value > 214748364, or equal but the next digit is > 7 (or 8),
134 * the number is too big, and we will return a range error.
136 * Set any if any `digits' consumed; make it negative to indicate
139 cutoff = (__INT)(neg ? __INT_MIN : __INT_MAX);
140 cutlim = (int)(cutoff % base);
149 for (acc = 0, any = 0;; c = *s++) {
150 if (c >= '0' && c <= '9')
152 else if (c >= 'a' && c <= 'z')
154 else if (c >= 'A' && c <= 'Z')
163 if (acc < cutoff || (acc == cutoff && i > cutlim)) {
165 #if !defined(_KERNEL) && !defined(_STANDALONE)
178 if (acc > cutoff || (acc == cutoff && i > cutlim)) {
180 #if !defined(_KERNEL) && !defined(_STANDALONE)
195 /* LINTED interface specification */
196 *endptr = __UNCONST(any ? s - 1 : nptr);
200 #if !defined(_KERNEL) && !defined(_STANDALONE) && \
201 !defined(HAVE_NBTOOL_CONFIG_H) && !defined(BCS_ONLY)
203 _FUNCNAME(const char *nptr, char **endptr, int base)
205 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, _current_locale());
209 INT_FUNCNAME(, _FUNCNAME, _l)(const char *nptr, char **endptr, int base, locale_t loc)
211 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc);