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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | This code is based on strtoul.c which has the following copyright. |
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3 | It is used to convert a string into an unsigned long long. |
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4 | |||
5 | long long _strtoull_r (struct _reent *rptr, const char *s, |
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6 | char **ptr, int base); |
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7 | |||
8 | */ |
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9 | |||
10 | /* |
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11 | * Copyright (c) 1990 Regents of the University of California. |
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12 | * All rights reserved. |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * 3. All advertising materials mentioning features or use of this software |
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23 | * must display the following acknowledgement: |
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24 | * This product includes software developed by the University of |
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25 | * California, Berkeley and its contributors. |
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26 | * 4. Neither the name of the University nor the names of its contributors |
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27 | * may be used to endorse or promote products derived from this software |
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28 | * without specific prior written permission. |
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29 | * |
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30 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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31 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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32 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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33 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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34 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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35 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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36 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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37 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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38 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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39 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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40 | * SUCH DAMAGE. |
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41 | */ |
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42 | |||
43 | #ifdef __GNUC__ |
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44 | |||
45 | #define _GNU_SOURCE |
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46 | #include <_ansi.h> |
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47 | #include |
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48 | #include |
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49 | #include |
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50 | #include |
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51 | #include |
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52 | |||
53 | /* |
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54 | * Convert a string to an unsigned long long integer. |
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55 | * |
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56 | * Ignores `locale' stuff. Assumes that the upper and lower case |
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57 | * alphabets and digits are each contiguous. |
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58 | */ |
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59 | unsigned long long |
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60 | _DEFUN (_strtoull_r, (rptr, nptr, endptr, base), |
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61 | struct _reent *rptr _AND |
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4921 | Serge | 62 | _CONST char *__restrict nptr _AND |
63 | char **__restrict endptr _AND |
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4349 | Serge | 64 | int base) |
65 | { |
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66 | register const unsigned char *s = (const unsigned char *)nptr; |
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67 | register unsigned long long acc; |
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68 | register int c; |
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69 | register unsigned long long cutoff; |
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70 | register int neg = 0, any, cutlim; |
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71 | |||
72 | /* |
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73 | * See strtol for comments as to the logic used. |
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74 | */ |
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75 | do { |
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76 | c = *s++; |
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77 | } while (isspace(c)); |
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78 | if (c == '-') { |
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79 | neg = 1; |
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80 | c = *s++; |
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81 | } else if (c == '+') |
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82 | c = *s++; |
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83 | if ((base == 0 || base == 16) && |
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84 | c == '0' && (*s == 'x' || *s == 'X')) { |
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85 | c = s[1]; |
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86 | s += 2; |
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87 | base = 16; |
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88 | } |
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89 | if (base == 0) |
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90 | base = c == '0' ? 8 : 10; |
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91 | cutoff = (unsigned long long)ULONG_LONG_MAX / (unsigned long long)base; |
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92 | cutlim = (unsigned long long)ULONG_LONG_MAX % (unsigned long long)base; |
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93 | for (acc = 0, any = 0;; c = *s++) { |
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94 | if (isdigit(c)) |
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95 | c -= '0'; |
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96 | else if (isalpha(c)) |
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97 | c -= isupper(c) ? 'A' - 10 : 'a' - 10; |
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98 | else |
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99 | break; |
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100 | if (c >= base) |
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101 | break; |
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102 | if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) |
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103 | any = -1; |
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104 | else { |
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105 | any = 1; |
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106 | acc *= base; |
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107 | acc += c; |
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108 | } |
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109 | } |
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110 | if (any < 0) { |
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111 | acc = ULONG_LONG_MAX; |
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112 | rptr->_errno = ERANGE; |
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113 | } else if (neg) |
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114 | acc = -acc; |
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115 | if (endptr != 0) |
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116 | *endptr = (char *) (any ? (char *)s - 1 : nptr); |
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117 | return (acc); |
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118 | } |
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119 | |||
120 | #endif /* __GNUC__ */>> |