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
|
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
Contributed by Paul Brook
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Libgfortran 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 General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <assert.h>
#include <string.h>
#include <strings.h>
/* Given a fortran string, return its length exclusive of the trailing
spaces. */
gfc_charlen_type
fstrlen (const char *string, gfc_charlen_type len)
{
for (; len > 0; len--)
if (string[len-1] != ' ')
break;
return len;
}
/* Copy a Fortran string (not null-terminated, hence length arguments
for both source and destination strings. Returns the non-padded
length of the destination. */
gfc_charlen_type
fstrcpy (char *dest, gfc_charlen_type destlen,
const char *src, gfc_charlen_type srclen)
{
if (srclen >= destlen)
{
/* This will truncate if too long. */
memcpy (dest, src, destlen);
return destlen;
}
else
{
memcpy (dest, src, srclen);
/* Pad with spaces. */
memset (&dest[srclen], ' ', destlen - srclen);
return srclen;
}
}
/* Copy a null-terminated C string to a non-null-terminated Fortran
string. Returns the non-padded length of the destination string. */
gfc_charlen_type
cf_strcpy (char *dest, gfc_charlen_type dest_len, const char *src)
{
size_t src_len;
src_len = strlen (src);
if (src_len >= (size_t) dest_len)
{
/* This will truncate if too long. */
memcpy (dest, src, dest_len);
return dest_len;
}
else
{
memcpy (dest, src, src_len);
/* Pad with spaces. */
memset (&dest[src_len], ' ', dest_len - src_len);
return src_len;
}
}
#ifndef HAVE_STRNLEN
static size_t
strnlen (const char *s, size_t maxlen)
{
for (size_t ii = 0; ii < maxlen; ii++)
{
if (s[ii] == '\0')
return ii;
}
return maxlen;
}
#endif
#ifndef HAVE_STRNDUP
static char *
strndup (const char *s, size_t n)
{
size_t len = strnlen (s, n);
char *p = malloc (len + 1);
if (!p)
return NULL;
memcpy (p, s, len);
p[len] = '\0';
return p;
}
#endif
/* Duplicate a non-null-terminated Fortran string to a malloced
null-terminated C string. */
char *
fc_strdup (const char *src, gfc_charlen_type src_len)
{
gfc_charlen_type n = fstrlen (src, src_len);
char *p = strndup (src, n);
if (!p)
os_error ("Memory allocation failed in fc_strdup");
return p;
}
/* Duplicate a non-null-terminated Fortran string to a malloced
null-terminated C string, without getting rid of trailing
blanks. */
char *
fc_strdup_notrim (const char *src, gfc_charlen_type src_len)
{
char *p = strndup (src, src_len);
if (!p)
os_error ("Memory allocation failed in fc_strdup");
return p;
}
/* Given a fortran string and an array of st_option structures, search through
the array to find a match. If the option is not found, we generate an error
if no default is provided. */
int
find_option (st_parameter_common *cmp, const char *s1, gfc_charlen_type s1_len,
const st_option * opts, const char *error_message)
{
/* Strip trailing blanks from the Fortran string. */
size_t len = (size_t) fstrlen (s1, s1_len);
for (; opts->name; opts++)
if (len == strlen(opts->name) && strncasecmp (s1, opts->name, len) == 0)
return opts->value;
generate_error (cmp, LIBERROR_BAD_OPTION, error_message);
return -1;
}
/* Fast helper function for a positive value that fits in uint64_t. */
static inline char *
itoa64 (uint64_t n, char *p)
{
while (n != 0)
{
*--p = '0' + (n % 10);
n /= 10;
}
return p;
}
#if defined(HAVE_GFC_INTEGER_16)
# define TEN19 ((GFC_UINTEGER_LARGEST) 1000000 * (GFC_UINTEGER_LARGEST) 1000000 * (GFC_UINTEGER_LARGEST) 10000000)
/* Same as itoa64(), with zero padding of 19 digits. */
static inline char *
itoa64_pad19 (uint64_t n, char *p)
{
for (int k = 0; k < 19; k++)
{
*--p = '0' + (n % 10);
n /= 10;
}
return p;
}
#endif
/* Integer to decimal conversion.
This function is much more restricted than the widespread (but
non-standard) itoa() function. This version has the following
characteristics:
- it takes only non-negative arguments
- it is async-signal-safe (we use it runtime/backtrace.c)
- it works in base 10 (see xtoa, otoa, btoa functions
in io/write.c for other radices)
*/
const char *
gfc_itoa (GFC_UINTEGER_LARGEST n, char *buffer, size_t len)
{
char *p;
if (len < GFC_ITOA_BUF_SIZE)
sys_abort ();
if (n == 0)
return "0";
p = buffer + GFC_ITOA_BUF_SIZE - 1;
*p = '\0';
#if defined(HAVE_GFC_INTEGER_16)
/* On targets that have a 128-bit integer type, division in that type
is slow, because it occurs through a function call. We avoid that. */
if (n <= UINT64_MAX)
/* If the value fits in uint64_t, use the fast function. */
return itoa64 (n, p);
else
{
/* Otherwise, break down into smaller bits by division. Two calls to
the uint64_t function are not sufficient for all 128-bit unsigned
integers (we would need three calls), but they do suffice for all
values up to 2^127, which is the largest that Fortran can produce
(-HUGE(0_16)-1) with its signed integer types. */
_Static_assert (sizeof(GFC_UINTEGER_LARGEST) <= 2 * sizeof(uint64_t),
"integer too large");
GFC_UINTEGER_LARGEST r;
r = n % TEN19;
n = n / TEN19;
assert (r <= UINT64_MAX);
p = itoa64_pad19 (r, p);
assert(n <= UINT64_MAX);
return itoa64 (n, p);
}
#else
/* On targets where the largest integer is 64-bit, just use that. */
return itoa64 (n, p);
#endif
}
|