Annotation of embedaddon/rsync/lib/compat.c, revision 1.1.1.4
1.1 misho 1: /*
2: * Reimplementations of standard functions for platforms that don't have them.
3: *
4: * Copyright (C) 1998 Andrew Tridgell
5: * Copyright (C) 2002 Martin Pool
1.1.1.4 ! misho 6: * Copyright (C) 2004-2020 Wayne Davison
1.1 misho 7: *
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.
12: *
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.
17: *
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.
20: */
21:
22: #include "rsync.h"
1.1.1.2 misho 23: #include "itypes.h"
24:
25: static char number_separator;
1.1 misho 26:
1.1.1.4 ! misho 27: char get_number_separator(void)
1.1 misho 28: {
1.1.1.4 ! misho 29: if (!number_separator) {
! 30: char buf[32];
! 31: snprintf(buf, sizeof buf, "%f", 3.14);
! 32: if (strchr(buf, '.') != NULL)
! 33: number_separator = ',';
! 34: else
! 35: number_separator = '.';
! 36: }
! 37:
! 38: return number_separator;
! 39: }
! 40:
! 41: char get_decimal_point(void)
! 42: {
! 43: return get_number_separator() == ',' ? '.' : ',';
1.1 misho 44: }
45:
46: #ifndef HAVE_GETCWD
47: char *getcwd(char *buf, int size)
48: {
49: return getwd(buf);
50: }
51: #endif
52:
53:
54: #ifndef HAVE_WAITPID
55: pid_t waitpid(pid_t pid, int *statptr, int options)
56: {
57: #ifdef HAVE_WAIT4
58: return wait4(pid, statptr, options, NULL);
59: #else
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) {
66: errno = ECHILD;
67: return -1;
68: }
69: if (statptr == NULL)
70: statptr = &dummystat;
71: while (((tmp_pid = wait3(statptr, options, 0)) != pid) &&
72: (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
73: ;
74: return tmp_pid;
75: #endif
76: }
77: #endif
78:
79:
80: #ifndef HAVE_MEMMOVE
81: void *memmove(void *dest, const void *src, size_t n)
82: {
83: bcopy((char *) src, (char *) dest, n);
84: return dest;
85: }
86: #endif
87:
88: #ifndef HAVE_STRPBRK
89: /**
1.1.1.4 ! misho 90: * Find the first occurrence in @p s of any character in @p accept.
1.1 misho 91: *
92: * Derived from glibc
93: **/
94: char *strpbrk(const char *s, const char *accept)
95: {
96: while (*s != '\0') {
97: const char *a = accept;
98: while (*a != '\0') {
99: if (*a++ == *s) return (char *)s;
100: }
101: ++s;
102: }
103:
104: return NULL;
105: }
106: #endif
107:
108:
109: #ifndef HAVE_STRLCPY
110: /**
111: * Like strncpy but does not 0 fill the buffer and always null
112: * terminates.
113: *
114: * @param bufsize is the size of the destination buffer.
115: *
116: * @return index of the terminating byte.
117: **/
118: size_t strlcpy(char *d, const char *s, size_t bufsize)
119: {
120: size_t len = strlen(s);
121: size_t ret = len;
122: if (bufsize > 0) {
123: if (len >= bufsize)
124: len = bufsize-1;
125: memcpy(d, s, len);
126: d[len] = 0;
127: }
128: return ret;
129: }
130: #endif
131:
132: #ifndef HAVE_STRLCAT
133: /**
134: * Like strncat() but does not 0 fill the buffer and always null
135: * terminates.
136: *
137: * @param bufsize length of the buffer, which should be one more than
138: * the maximum resulting string length.
139: **/
140: size_t strlcat(char *d, const char *s, size_t bufsize)
141: {
142: size_t len1 = strlen(d);
143: size_t len2 = strlen(s);
144: size_t ret = len1 + len2;
145:
146: if (len1 < bufsize - 1) {
147: if (len2 >= bufsize - len1)
148: len2 = bufsize - len1 - 1;
149: memcpy(d+len1, s, len2);
150: d[len1+len2] = 0;
151: }
152: return ret;
153: }
154: #endif
155:
156: /* some systems don't take the 2nd argument */
157: int sys_gettimeofday(struct timeval *tv)
158: {
159: #ifdef HAVE_GETTIMEOFDAY_TZ
160: return gettimeofday(tv, NULL);
161: #else
162: return gettimeofday(tv);
163: #endif
164: }
1.1.1.2 misho 165:
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)
171: {
172: static char bufs[4][128]; /* more than enough room */
173: static unsigned int n;
174: char *s;
175: int len, negated;
176:
1.1.1.4 ! misho 177: if (human_flag && !number_separator)
! 178: (void)get_number_separator();
1.1.1.2 misho 179:
180: n = (n + 1) % (sizeof bufs / sizeof bufs[0]);
181:
182: if (human_flag > 1) {
1.1.1.4 ! misho 183: int mult = human_flag == 2 ? 1000 : 1024;
! 184: if (num >= mult || num <= -mult) {
! 185: double dnum = (double)num / mult;
! 186: char units;
! 187: if (num < 0)
! 188: dnum = -dnum;
! 189: if (dnum < mult)
! 190: units = 'K';
! 191: else if ((dnum /= mult) < mult)
! 192: units = 'M';
! 193: else if ((dnum /= mult) < mult)
! 194: units = 'G';
! 195: else if ((dnum /= mult) < mult)
! 196: units = 'T';
! 197: else {
! 198: dnum /= mult;
! 199: units = 'P';
! 200: }
! 201: if (num < 0)
! 202: dnum = -dnum;
! 203: snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units);
! 204: return bufs[n];
! 205: }
1.1.1.2 misho 206: }
207:
208: s = bufs[n] + sizeof bufs[0] - 1;
209: if (fract) {
210: len = strlen(fract);
211: s -= len;
212: strlcpy(s, fract, len + 1);
213: } else
214: *s = '\0';
215:
216: len = 0;
217:
218: if (!num)
219: *--s = '0';
220: if (num < 0) {
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';
224: num = -(num / 10);
225: len++;
226: negated = 1;
227: } else
228: negated = 0;
229:
230: while (num) {
231: if (human_flag) {
232: if (len == 3) {
233: *--s = number_separator;
234: len = 1;
235: } else
236: len++;
237: }
238: *--s = (char)(num % 10) + '0';
239: num /= 10;
240: }
241:
242: if (negated)
243: *--s = '-';
244:
245: return s;
246: }
247:
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)
253: {
254: static char tmp_buf[128];
255: #if SIZEOF_INT64 >= 8
256: char *fract;
257:
258: snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
259:
260: if (!human_flag || (dnum < 1000.0 && dnum > -1000.0))
261: return tmp_buf;
262:
263: for (fract = tmp_buf+1; isDigit(fract); fract++) {}
264:
265: return do_big_num((int64)dnum, human_flag, fract);
266: #else
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);
270: return tmp_buf;
271: #endif
272: }
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