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
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
|
/* Copyright (C) 2002 Manuel Novoa III
* From my (incomplete) stdlib library for linux and (soon) elks.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION!
*
* This code is currently under development. Also, I plan to port
* it to elks which is a 16-bit environment with a fairly limited
* compiler. Therefore, please refrain from modifying this code
* and, instead, pass any bug-fixes, etc. to me. Thanks. Manuel
*
* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! */
#define _ISOC99_SOURCE /* for ULLONG primarily... */
#define _GNU_SOURCE
#include <stdlib.h>
#include <limits.h>
#include <stdint.h>
#include <inttypes.h>
#include <ctype.h>
#include <errno.h>
#include <assert.h>
extern unsigned long
_stdlib_strto_l(register const char * __restrict str,
char ** __restrict endptr, int base, int sflag);
extern unsigned long long
_stdlib_strto_ll(register const char * __restrict str,
char ** __restrict endptr, int base, int sflag);
/* TODO: gcc reports an error due to prototype conflicts. Don't include
* the header for the problem cases? */
#define HEADER_ALIAS_PROBLEM
/**********************************************************************/
#ifdef L_abs
#ifdef HEADER_ALIAS_PROBLEM
/* #if UINT_MAX < ULONG_MAX */
int abs(int j)
{
return (j >= 0) ? j : -j;
}
#endif /* UINT_MAX < ULONG_MAX */
#endif
/**********************************************************************/
#ifdef L_labs
#ifndef HEADER_ALIAS_PROBLEM
/* #if UINT_MAX == ULONG_MAX */
strong_alias(labs,abs)
#endif
#if defined(ULLONG_MAX) && (ULLONG_MAX == ULONG_MAX)
strong_alias(labs,llabs)
#endif
#if ULONG_MAX == UINTMAX_MAX
strong_alias(labs,imaxabs)
#endif
long int labs(long int j)
{
return (j >= 0) ? j : -j;
}
#endif
/**********************************************************************/
#ifdef L_llabs
#if defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX)
#if (ULLONG_MAX == UINTMAX_MAX)
strong_alias(llabs,imaxabs)
#endif
long long int llabs(long long int j)
{
return (j >= 0) ? j : -j;
}
#endif /* defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX) */
#endif
/**********************************************************************/
#ifdef L_atoi
#ifdef HEADER_ALIAS_PROBLEM
/* #if UINT_MAX < ULONG_MAX */
int atoi(const char *nptr)
{
return (int) strtol(nptr, (char **) NULL, 10);
}
#endif /* UINT_MAX < ULONG_MAX */
#endif
/**********************************************************************/
#ifdef L_atol
#ifndef HEADER_ALIAS_PROBLEM
/* #if UINT_MAX == ULONG_MAX */
strong_alias(atol,atoi)
#endif
#if defined(ULLONG_MAX) && (ULLONG_MAX == ULONG_MAX)
strong_alias(atol,atoll)
#endif
long atol(const char *nptr)
{
return strtol(nptr, (char **) NULL, 10);
}
#endif
/**********************************************************************/
#ifdef L_atoll
#if defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX)
long long atoll(const char *nptr)
{
return strtoll(nptr, (char **) NULL, 10);
}
#endif /* defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX) */
#endif
/**********************************************************************/
#ifdef L_strtol
#if ULONG_MAX == UINTMAX_MAX
strong_alias(strtol,strtoimax)
#endif
#if defined(ULLONG_MAX) && (ULLONG_MAX == ULONG_MAX)
strong_alias(strtol,strtoll)
#endif
long strtol(const char * __restrict str, char ** __restrict endptr, int base)
{
return _stdlib_strto_l(str, endptr, base, 1);
}
#endif
/**********************************************************************/
#ifdef L_strtoll
#if defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX)
#if (ULLONG_MAX == UINTMAX_MAX)
strong_alias(strtoll,strtoimax)
#endif
long long strtoll(const char * __restrict str,
char ** __restrict endptr, int base)
{
return (long long) _stdlib_strto_ll(str, endptr, base, 1);
}
#endif /* defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX) */
#endif
/**********************************************************************/
#ifdef L_strtoul
#if ULONG_MAX == UINTMAX_MAX
strong_alias(strtoul,strtoumax)
#endif
#if defined(ULLONG_MAX) && (ULLONG_MAX == ULONG_MAX)
strong_alias(strtoul,strtoull)
#endif
unsigned long strtoul(const char * __restrict str,
char ** __restrict endptr, int base)
{
return _stdlib_strto_l(str, endptr, base, 0);
}
#endif
/**********************************************************************/
#ifdef L_strtoull
#if defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX)
#if (ULLONG_MAX == UINTMAX_MAX)
strong_alias(strtoull,strtoumax)
#endif
unsigned long long strtoull(const char * __restrict str,
char ** __restrict endptr, int base)
{
return _stdlib_strto_ll(str, endptr, base, 0);
}
#endif /* defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX) */
#endif
/**********************************************************************/
/* Support routines follow */
/**********************************************************************/
/* Set if we want errno set appropriately. */
/* NOTE: Implies _STRTO_ENDPTR below */
#define _STRTO_ERRNO 1
/* Set if we want support for the endptr arg. */
/* Implied by _STRTO_ERRNO. */
#define _STRTO_ENDPTR 1
#if _STRTO_ERRNO
#undef _STRTO_ENDPTR
#define _STRTO_ENDPTR 1
#define SET_ERRNO(X) __set_errno(X)
#else
#define SET_ERRNO(X) ((void)(X)) /* keep side effects */
#endif
/**********************************************************************/
#ifdef L__stdlib_strto_l
/* This is the main work fuction which handles both strtol (sflag = 1) and
* strtoul (sflag = 0). */
unsigned long _stdlib_strto_l(register const char * __restrict str,
char ** __restrict endptr, int base, int sflag)
{
unsigned long number, cutoff;
#if _STRTO_ENDPTR
const char *fail_char;
#define SET_FAIL(X) fail_char = (X)
#else
#define SET_FAIL(X) ((void)(X)) /* Keep side effects. */
#endif
unsigned char negative, digit, cutoff_digit;
assert((sflag == 0) || (sflag == 1));
SET_FAIL(str);
while (isspace(*str)) { /* Skip leading whitespace. */
++str;
}
/* Handle optional sign. */
negative = 0;
switch(*str) {
case '-': negative = 1; /* Fall through to increment str. */
case '+': ++str;
}
if (!(base & ~0x10)) { /* Either dynamic (base = 0) or base 16. */
base += 10; /* Default is 10 (26). */
if (*str == '0') {
SET_FAIL(++str);
base -= 2; /* Now base is 8 or 16 (24). */
if ((0x20|(*str)) == 'x') { /* WARNING: assumes ascii. */
++str;
base += base; /* Base is 16 (16 or 48). */
}
}
if (base > 16) { /* Adjust in case base wasn't dynamic. */
base = 16;
}
}
number = 0;
if (((unsigned)(base - 2)) < 35) { /* Legal base. */
cutoff_digit = ULONG_MAX % base;
cutoff = ULONG_MAX / base;
do {
digit = (((unsigned char)(*str - '0')) <= 9)
? (*str - '0')
: ((*str >= 'A')
? (((0x20|(*str)) - 'a' + 10)) /* WARNING: assumes ascii. */
: 40);
if (digit >= base) {
break;
}
SET_FAIL(++str);
if ((number > cutoff)
|| ((number == cutoff) && (digit > cutoff_digit))) {
number = ULONG_MAX;
negative &= sflag;
SET_ERRNO(ERANGE);
} else {
number = number * base + digit;
}
} while (1);
}
#if _STRTO_ENDPTR
if (endptr) {
*endptr = (char *) fail_char;
}
#endif
{
unsigned long tmp = ((negative)
? ((unsigned long)(-(1+LONG_MIN)))+1
: LONG_MAX);
if (sflag && (number > tmp)) {
number = tmp;
SET_ERRNO(ERANGE);
}
}
return negative ? (unsigned long)(-((long)number)) : number;
}
#endif
/**********************************************************************/
#ifdef L__stdlib_strto_ll
#if defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX)
/* This is the main work fuction which handles both strtoll (sflag = 1) and
* strtoull (sflag = 0). */
unsigned long long _stdlib_strto_ll(register const char * __restrict str,
char ** __restrict endptr, int base,
int sflag)
{
unsigned long long number;
#if _STRTO_ENDPTR
const char *fail_char;
#define SET_FAIL(X) fail_char = (X)
#else
#define SET_FAIL(X) ((void)(X)) /* Keep side effects. */
#endif
unsigned int n1;
unsigned char negative, digit;
assert((sflag == 0) || (sflag == 1));
SET_FAIL(str);
while (isspace(*str)) { /* Skip leading whitespace. */
++str;
}
/* Handle optional sign. */
negative = 0;
switch(*str) {
case '-': negative = 1; /* Fall through to increment str. */
case '+': ++str;
}
if (!(base & ~0x10)) { /* Either dynamic (base = 0) or base 16. */
base += 10; /* Default is 10 (26). */
if (*str == '0') {
SET_FAIL(++str);
base -= 2; /* Now base is 8 or 16 (24). */
if ((0x20|(*str)) == 'x') { /* WARNING: assumes ascii. */
++str;
base += base; /* Base is 16 (16 or 48). */
}
}
if (base > 16) { /* Adjust in case base wasn't dynamic. */
base = 16;
}
}
number = 0;
if (((unsigned)(base - 2)) < 35) { /* Legal base. */
do {
digit = (((unsigned char)(*str - '0')) <= 9)
? (*str - '0')
: ((*str >= 'A')
? (((0x20|(*str)) - 'a' + 10)) /* WARNING: assumes ascii. */
: 40);
if (digit >= base) {
break;
}
SET_FAIL(++str);
#if 1
/* Optional, but speeds things up in the usual case. */
if (number <= (ULLONG_MAX >> 6)) {
number = number * base + digit;
} else
#endif
{
n1 = ((unsigned char) number) * base + digit;
number = (number >> CHAR_BIT) * base;
if (number + (n1 >> CHAR_BIT) <= (ULLONG_MAX >> CHAR_BIT)) {
number = (number << CHAR_BIT) + n1;
} else { /* Overflow. */
number = ULLONG_MAX;
negative &= sflag;
SET_ERRNO(ERANGE);
}
}
} while (1);
}
#if _STRTO_ENDPTR
if (endptr) {
*endptr = (char *) fail_char;
}
#endif
{
unsigned long long tmp = ((negative)
? ((unsigned long long)(-(1+LLONG_MIN)))+1
: LLONG_MAX);
if (sflag && (number > tmp)) {
number = tmp;
SET_ERRNO(ERANGE);
}
}
return negative ? (unsigned long long)(-((long long)number)) : number;
}
#endif /* defined(ULLONG_MAX) && (ULLONG_MAX > ULONG_MAX) */
#endif
/**********************************************************************/
|
