1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* strtoull.c --
*
* Source code for the "strtoull" library procedure.
*
* Copyright (c) 1988 The Regents of the University of California.
* Copyright (c) 1994 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: strtoull.c,v 1.3 2002/02/15 23:42:12 kennykb Exp $
*/
#include "tcl.h"
#include "tclPort.h"
#include <ctype.h>
/*
* The table below is used to convert from ASCII digits to a
* numerical equivalent. It maps from '0' through 'z' to integers
* (100 for non-digit characters).
*/
static char cvtIn[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, /* '0' - '9' */
100, 100, 100, 100, 100, 100, 100, /* punctuation */
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, /* 'A' - 'Z' */
20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35,
100, 100, 100, 100, 100, 100, /* punctuation */
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, /* 'a' - 'z' */
20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
30, 31, 32, 33, 34, 35};
/*
*----------------------------------------------------------------------
*
* strtoull --
*
* Convert an ASCII string into an integer.
*
* Results:
* The return value is the integer equivalent of string. If endPtr
* is non-NULL, then *endPtr is filled in with the character
* after the last one that was part of the integer. If string
* doesn't contain a valid integer value, then zero is returned
* and *endPtr is set to string.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
Tcl_WideUInt
strtoull(string, endPtr, base)
char *string; /* String of ASCII digits, possibly
* preceded by white space. For bases
* greater than 10, either lower- or
* upper-case digits may be used.
*/
char **endPtr; /* Where to store address of terminating
* character, or NULL. */
int base; /* Base for conversion. Must be less
* than 37. If 0, then the base is chosen
* from the leading characters of string:
* "0x" means hex, "0" means octal, anything
* else means decimal.
*/
{
register char *p;
register Tcl_WideUInt result = 0;
register unsigned digit;
register Tcl_WideUInt shifted;
int anyDigits = 0, negative = 0;
/*
* Skip any leading blanks.
*/
p = string;
while (isspace(*p)) { /* INTL: locale-dependent */
p += 1;
}
/*
* Check for a sign.
*/
if (*p == '-') {
p += 1;
negative = 1;
} else {
if (*p == '+') {
p += 1;
}
}
/*
* If no base was provided, pick one from the leading characters
* of the string.
*/
if (base == 0) {
if (*p == '0') {
p += 1;
if (*p == 'x' || *p == 'X') {
p += 1;
base = 16;
} else {
/*
* Must set anyDigits here, otherwise "0" produces a
* "no digits" error.
*/
anyDigits = 1;
base = 8;
}
} else {
base = 10;
}
} else if (base == 16) {
/*
* Skip a leading "0x" from hex numbers.
*/
if ((p[0] == '0') && (p[1] == 'x' || *p == 'X')) {
p += 2;
}
}
/*
* Sorry this code is so messy, but speed seems important. Do
* different things for base 8, 10, 16, and other.
*/
if (base == 8) {
for ( ; ; p += 1) {
digit = *p - '0';
if (digit > 7) {
break;
}
shifted = result << 3;
if ((shifted >> 3) != result) {
goto overflow;
}
result = shifted + digit;
if ( result < shifted ) {
goto overflow;
}
anyDigits = 1;
}
} else if (base == 10) {
for ( ; ; p += 1) {
digit = *p - '0';
if (digit > 9) {
break;
}
shifted = 10 * result;
if ((shifted / 10) != result) {
goto overflow;
}
result = shifted + digit;
if ( result < shifted ) {
goto overflow;
}
anyDigits = 1;
}
} else if (base == 16) {
for ( ; ; p += 1) {
digit = *p - '0';
if (digit > ('z' - '0')) {
break;
}
digit = cvtIn[digit];
if (digit > 15) {
break;
}
shifted = result << 4;
if ((shifted >> 4) != result) {
goto overflow;
}
result = shifted + digit;
if ( result < shifted ) {
goto overflow;
}
anyDigits = 1;
}
} else if ( base >= 2 && base <= 36 ) {
for ( ; ; p += 1) {
digit = *p - '0';
if (digit > ('z' - '0')) {
break;
}
digit = cvtIn[digit];
if (digit >= (unsigned) base) {
break;
}
shifted = result * base;
if ((shifted/base) != result) {
goto overflow;
}
result = shifted + digit;
if ( result < shifted ) {
goto overflow;
}
anyDigits = 1;
}
}
/*
* Negate if we found a '-' earlier.
*/
if (negative) {
result = (Tcl_WideUInt)(-((Tcl_WideInt)result));
}
/*
* See if there were any digits at all.
*/
if (!anyDigits) {
p = string;
}
if (endPtr != 0) {
*endPtr = p;
}
return result;
/*
* On overflow generate the right output
*/
overflow:
errno = ERANGE;
if (endPtr != 0) {
for ( ; ; p += 1) {
digit = *p - '0';
if (digit > ('z' - '0')) {
break;
}
digit = cvtIn[digit];
if (digit >= (unsigned) base) {
break;
}
}
*endPtr = p;
}
return (Tcl_WideUInt)Tcl_LongAsWide(-1);
}
|
