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
6: * Copyright (C) 2004, 2005, 2006 Wayne Davison
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"
23: #include "itypes.h"
24:
25: static char number_separator;
26:
27: #ifndef HAVE_STRDUP
28: char *strdup(char *s)
29: {
30: int len = strlen(s) + 1;
31: char *ret = (char *)malloc(len);
32: if (ret)
33: memcpy(ret, s, len);
34: return ret;
35: }
36: #endif
37:
38: #ifndef HAVE_GETCWD
39: char *getcwd(char *buf, int size)
40: {
41: return getwd(buf);
42: }
43: #endif
44:
45:
46: #ifndef HAVE_WAITPID
47: pid_t waitpid(pid_t pid, int *statptr, int options)
48: {
49: #ifdef HAVE_WAIT4
50: return wait4(pid, statptr, options, NULL);
51: #else
52: /* If wait4 is also not available, try wait3 for SVR3 variants */
53: /* Less ideal because can't actually request a specific pid */
54: /* At least the WNOHANG option is supported */
55: /* Code borrowed from apache fragment written by dwd@bell-labs.com */
56: int tmp_pid, dummystat;;
57: if (kill(pid, 0) == -1) {
58: errno = ECHILD;
59: return -1;
60: }
61: if (statptr == NULL)
62: statptr = &dummystat;
63: while (((tmp_pid = wait3(statptr, options, 0)) != pid) &&
64: (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
65: ;
66: return tmp_pid;
67: #endif
68: }
69: #endif
70:
71:
72: #ifndef HAVE_MEMMOVE
73: void *memmove(void *dest, const void *src, size_t n)
74: {
75: bcopy((char *) src, (char *) dest, n);
76: return dest;
77: }
78: #endif
79:
80: #ifndef HAVE_STRPBRK
81: /**
82: * Find the first ocurrence in @p s of any character in @p accept.
83: *
84: * Derived from glibc
85: **/
86: char *strpbrk(const char *s, const char *accept)
87: {
88: while (*s != '\0') {
89: const char *a = accept;
90: while (*a != '\0') {
91: if (*a++ == *s) return (char *)s;
92: }
93: ++s;
94: }
95:
96: return NULL;
97: }
98: #endif
99:
100:
101: #ifndef HAVE_STRLCPY
102: /**
103: * Like strncpy but does not 0 fill the buffer and always null
104: * terminates.
105: *
106: * @param bufsize is the size of the destination buffer.
107: *
108: * @return index of the terminating byte.
109: **/
110: size_t strlcpy(char *d, const char *s, size_t bufsize)
111: {
112: size_t len = strlen(s);
113: size_t ret = len;
114: if (bufsize > 0) {
115: if (len >= bufsize)
116: len = bufsize-1;
117: memcpy(d, s, len);
118: d[len] = 0;
119: }
120: return ret;
121: }
122: #endif
123:
124: #ifndef HAVE_STRLCAT
125: /**
126: * Like strncat() but does not 0 fill the buffer and always null
127: * terminates.
128: *
129: * @param bufsize length of the buffer, which should be one more than
130: * the maximum resulting string length.
131: **/
132: size_t strlcat(char *d, const char *s, size_t bufsize)
133: {
134: size_t len1 = strlen(d);
135: size_t len2 = strlen(s);
136: size_t ret = len1 + len2;
137:
138: if (len1 < bufsize - 1) {
139: if (len2 >= bufsize - len1)
140: len2 = bufsize - len1 - 1;
141: memcpy(d+len1, s, len2);
142: d[len1+len2] = 0;
143: }
144: return ret;
145: }
146: #endif
147:
148: /* some systems don't take the 2nd argument */
149: int sys_gettimeofday(struct timeval *tv)
150: {
151: #ifdef HAVE_GETTIMEOFDAY_TZ
152: return gettimeofday(tv, NULL);
153: #else
154: return gettimeofday(tv);
155: #endif
156: }
157:
158: #define HUMANIFY(mult) \
159: do { \
160: if (num >= mult || num <= -mult) { \
161: double dnum = (double)num / mult; \
162: char units; \
163: if (num < 0) \
164: dnum = -dnum; \
165: if (dnum < mult) \
166: units = 'K'; \
167: else if ((dnum /= mult) < mult) \
168: units = 'M'; \
169: else if ((dnum /= mult) < mult) \
170: units = 'G'; \
171: else { \
172: dnum /= mult; \
173: units = 'T'; \
174: } \
175: if (num < 0) \
176: dnum = -dnum; \
177: snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units); \
178: return bufs[n]; \
179: } \
180: } while (0)
181:
182: /* Return the int64 number as a string. If the human_flag arg is non-zero,
183: * we may output the number in K, M, G, or T units. If we don't add a unit
184: * suffix, we will append the fract string, if it is non-NULL. We can
185: * return up to 4 buffers at a time. */
186: char *do_big_num(int64 num, int human_flag, const char *fract)
187: {
188: static char bufs[4][128]; /* more than enough room */
189: static unsigned int n;
190: char *s;
191: int len, negated;
192:
193: if (human_flag && !number_separator) {
194: char buf[32];
195: snprintf(buf, sizeof buf, "%f", 3.14);
196: if (strchr(buf, '.') != NULL)
197: number_separator = ',';
198: else
199: number_separator = '.';
200: }
201:
202: n = (n + 1) % (sizeof bufs / sizeof bufs[0]);
203:
204: if (human_flag > 1) {
205: if (human_flag == 2)
206: HUMANIFY(1000);
207: else
208: HUMANIFY(1024);
209: }
210:
211: s = bufs[n] + sizeof bufs[0] - 1;
212: if (fract) {
213: len = strlen(fract);
214: s -= len;
215: strlcpy(s, fract, len + 1);
216: } else
217: *s = '\0';
218:
219: len = 0;
220:
221: if (!num)
222: *--s = '0';
223: if (num < 0) {
224: /* A maximum-size negated number can't fit as a positive,
225: * so do one digit in negated form to start us off. */
226: *--s = (char)(-(num % 10)) + '0';
227: num = -(num / 10);
228: len++;
229: negated = 1;
230: } else
231: negated = 0;
232:
233: while (num) {
234: if (human_flag) {
235: if (len == 3) {
236: *--s = number_separator;
237: len = 1;
238: } else
239: len++;
240: }
241: *--s = (char)(num % 10) + '0';
242: num /= 10;
243: }
244:
245: if (negated)
246: *--s = '-';
247:
248: return s;
249: }
250:
251: /* Return the double number as a string. If the human_flag option is > 1,
252: * we may output the number in K, M, G, or T units. The buffer we use for
253: * our result is either a single static buffer defined here, or a buffer
254: * we get from do_big_num(). */
255: char *do_big_dnum(double dnum, int human_flag, int decimal_digits)
256: {
257: static char tmp_buf[128];
258: #if SIZEOF_INT64 >= 8
259: char *fract;
260:
261: snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
262:
263: if (!human_flag || (dnum < 1000.0 && dnum > -1000.0))
264: return tmp_buf;
265:
266: for (fract = tmp_buf+1; isDigit(fract); fract++) {}
267:
268: return do_big_num((int64)dnum, human_flag, fract);
269: #else
270: /* A big number might lose digits converting to a too-short int64,
271: * so let's just return the raw double conversion. */
272: snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
273: return tmp_buf;
274: #endif
275: }
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