2 * Reimplementations of standard functions for platforms that don't have them.
4 * Copyright (C) 1998 Andrew Tridgell
5 * Copyright (C) 2002 Martin Pool
6 * Copyright (C) 2004-2020 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
25 static char number_separator;
27 char get_number_separator(void)
29 if (!number_separator) {
31 snprintf(buf, sizeof buf, "%f", 3.14);
32 if (strchr(buf, '.') != NULL)
33 number_separator = ',';
35 number_separator = '.';
38 return number_separator;
41 char get_decimal_point(void)
43 return get_number_separator() == ',' ? '.' : ',';
47 char *getcwd(char *buf, int size)
55 pid_t waitpid(pid_t pid, int *statptr, int options)
58 return wait4(pid, statptr, options, NULL);
60 /* If wait4 is also not available, try wait3 for SVR3 variants */
61 /* Less ideal because can't actually request a specific pid */
62 /* At least the WNOHANG option is supported */
63 /* Code borrowed from apache fragment written by dwd@bell-labs.com */
64 int tmp_pid, dummystat;;
65 if (kill(pid, 0) == -1) {
71 while (((tmp_pid = wait3(statptr, options, 0)) != pid) &&
72 (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
81 void *memmove(void *dest, const void *src, size_t n)
83 bcopy((char *) src, (char *) dest, n);
90 * Find the first occurrence in @p s of any character in @p accept.
94 char *strpbrk(const char *s, const char *accept)
97 const char *a = accept;
99 if (*a++ == *s) return (char *)s;
111 * Like strncpy but does not 0 fill the buffer and always null
114 * @param bufsize is the size of the destination buffer.
116 * @return index of the terminating byte.
118 size_t strlcpy(char *d, const char *s, size_t bufsize)
120 size_t len = strlen(s);
134 * Like strncat() but does not 0 fill the buffer and always null
137 * @param bufsize length of the buffer, which should be one more than
138 * the maximum resulting string length.
140 size_t strlcat(char *d, const char *s, size_t bufsize)
142 size_t len1 = strlen(d);
143 size_t len2 = strlen(s);
144 size_t ret = len1 + len2;
146 if (len1 < bufsize - 1) {
147 if (len2 >= bufsize - len1)
148 len2 = bufsize - len1 - 1;
149 memcpy(d+len1, s, len2);
156 /* some systems don't take the 2nd argument */
157 int sys_gettimeofday(struct timeval *tv)
159 #ifdef HAVE_GETTIMEOFDAY_TZ
160 return gettimeofday(tv, NULL);
162 return gettimeofday(tv);
166 /* Return the int64 number as a string. If the human_flag arg is non-zero,
167 * we may output the number in K, M, G, or T units. If we don't add a unit
168 * suffix, we will append the fract string, if it is non-NULL. We can
169 * return up to 4 buffers at a time. */
170 char *do_big_num(int64 num, int human_flag, const char *fract)
172 static char bufs[4][128]; /* more than enough room */
173 static unsigned int n;
177 if (human_flag && !number_separator)
178 (void)get_number_separator();
180 n = (n + 1) % (sizeof bufs / sizeof bufs[0]);
182 if (human_flag > 1) {
183 int mult = human_flag == 2 ? 1000 : 1024;
184 if (num >= mult || num <= -mult) {
185 double dnum = (double)num / mult;
191 else if ((dnum /= mult) < mult)
193 else if ((dnum /= mult) < mult)
195 else if ((dnum /= mult) < mult)
203 snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units);
208 s = bufs[n] + sizeof bufs[0] - 1;
212 strlcpy(s, fract, len + 1);
221 /* A maximum-size negated number can't fit as a positive,
222 * so do one digit in negated form to start us off. */
223 *--s = (char)(-(num % 10)) + '0';
233 *--s = number_separator;
238 *--s = (char)(num % 10) + '0';
248 /* Return the double number as a string. If the human_flag option is > 1,
249 * we may output the number in K, M, G, or T units. The buffer we use for
250 * our result is either a single static buffer defined here, or a buffer
251 * we get from do_big_num(). */
252 char *do_big_dnum(double dnum, int human_flag, int decimal_digits)
254 static char tmp_buf[128];
255 #if SIZEOF_INT64 >= 8
258 snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
260 if (!human_flag || (dnum < 1000.0 && dnum > -1000.0))
263 for (fract = tmp_buf+1; isDigit(fract); fract++) {}
265 return do_big_num((int64)dnum, human_flag, fract);
267 /* A big number might lose digits converting to a too-short int64,
268 * so let's just return the raw double conversion. */
269 snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);