1 files changed, 272 insertions, 0 deletions
diff --git a/lib/compat.c b/lib/compat.c
new file mode 100644
index 0000000..513d79b
--- /dev/null
+++ b/lib/compat.c
@@ -0,0 +1,272 @@
+/*
+ * Reimplementations of standard functions for platforms that don't have them.
+ *
+ * Copyright (C) 1998 Andrew Tridgell
+ * Copyright (C) 2002 Martin Pool
+ * Copyright (C) 2004-2020 Wayne Davison
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
+
+#include "rsync.h"
+#include "itypes.h"
+
+static char number_separator;
+
+char get_number_separator(void)
+{
+	if (!number_separator) {
+		char buf[32];
+		snprintf(buf, sizeof buf, "%f", 3.14);
+		if (strchr(buf, '.') != NULL)
+			number_separator = ',';
+		else
+			number_separator = '.';
+	}
+
+	return number_separator;
+}
+
+char get_decimal_point(void)
+{
+	return get_number_separator() == ',' ? '.' : ',';
+}
+
+#ifndef HAVE_GETCWD
+ char *getcwd(char *buf, int size)
+{
+	return getwd(buf);
+}
+#endif
+
+
+#ifndef HAVE_WAITPID
+ pid_t waitpid(pid_t pid, int *statptr, int options)
+{
+#ifdef HAVE_WAIT4
+	return wait4(pid, statptr, options, NULL);
+#else
+	/* If wait4 is also not available, try wait3 for SVR3 variants */
+	/* Less ideal because can't actually request a specific pid */
+	/* At least the WNOHANG option is supported */
+	/* Code borrowed from apache fragment written by dwd@bell-labs.com */
+	int tmp_pid, dummystat;;
+	if (kill(pid, 0) == -1) {
+		errno = ECHILD;
+		return -1;
+	}
+	if (statptr == NULL)
+		statptr = &dummystat;
+	while (((tmp_pid = wait3(statptr, options, 0)) != pid) &&
+		    (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
+	    ;
+	return tmp_pid;
+#endif
+}
+#endif
+
+
+#ifndef HAVE_MEMMOVE
+ void *memmove(void *dest, const void *src, size_t n)
+{
+	bcopy((char *) src, (char *) dest, n);
+	return dest;
+}
+#endif
+
+#ifndef HAVE_STRPBRK
+/**
+ * Find the first occurrence in @p s of any character in @p accept.
+ *
+ * Derived from glibc
+ **/
+ char *strpbrk(const char *s, const char *accept)
+{
+	while (*s != '\0')  {
+		const char *a = accept;
+		while (*a != '\0') {
+			if (*a++ == *s)	return (char *)s;
+		}
+		++s;
+	}
+
+	return NULL;
+}
+#endif
+
+
+#ifndef HAVE_STRLCPY
+/**
+ * Like strncpy but does not 0 fill the buffer and always null
+ * terminates.
+ *
+ * @param bufsize is the size of the destination buffer.
+ *
+ * @return index of the terminating byte.
+ **/
+ size_t strlcpy(char *d, const char *s, size_t bufsize)
+{
+	size_t len = strlen(s);
+	size_t ret = len;
+	if (bufsize > 0) {
+		if (len >= bufsize)
+			len = bufsize-1;
+		memcpy(d, s, len);
+		d[len] = 0;
+	}
+	return ret;
+}
+#endif
+
+#ifndef HAVE_STRLCAT
+/**
+ * Like strncat() but does not 0 fill the buffer and always null
+ * terminates.
+ *
+ * @param bufsize length of the buffer, which should be one more than
+ * the maximum resulting string length.
+ **/
+ size_t strlcat(char *d, const char *s, size_t bufsize)
+{
+	size_t len1 = strlen(d);
+	size_t len2 = strlen(s);
+	size_t ret = len1 + len2;
+
+	if (len1 < bufsize - 1) {
+		if (len2 >= bufsize - len1)
+			len2 = bufsize - len1 - 1;
+		memcpy(d+len1, s, len2);
+		d[len1+len2] = 0;
+	}
+	return ret;
+}
+#endif
+
+/* some systems don't take the 2nd argument */
+int sys_gettimeofday(struct timeval *tv)
+{
+#ifdef HAVE_GETTIMEOFDAY_TZ
+	return gettimeofday(tv, NULL);
+#else
+	return gettimeofday(tv);
+#endif
+}
+
+/* Return the int64 number as a string.  If the human_flag arg is non-zero,
+ * we may output the number in K, M, G, or T units.  If we don't add a unit
+ * suffix, we will append the fract string, if it is non-NULL.  We can
+ * return up to 4 buffers at a time. */
+char *do_big_num(int64 num, int human_flag, const char *fract)
+{
+	static char bufs[4][128]; /* more than enough room */
+	static unsigned int n;
+	char *s;
+	int len, negated;
+
+	if (human_flag && !number_separator)
+		(void)get_number_separator();
+
+	n = (n + 1) % (sizeof bufs / sizeof bufs[0]);
+
+	if (human_flag > 1) {
+		int mult = human_flag == 2 ? 1000 : 1024;
+		if (num >= mult || num <= -mult) {
+			double dnum = (double)num / mult;
+			char units;
+			if (num < 0)
+				dnum = -dnum;
+			if (dnum < mult)
+				units = 'K';
+			else if ((dnum /= mult) < mult)
+				units = 'M';
+			else if ((dnum /= mult) < mult)
+				units = 'G';
+			else if ((dnum /= mult) < mult)
+				units = 'T';
+			else {
+				dnum /= mult;
+				units = 'P';
+			}
+			if (num < 0)
+				dnum = -dnum;
+			snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units);
+			return bufs[n];
+		}
+	}
+
+	s = bufs[n] + sizeof bufs[0] - 1;
+	if (fract) {
+		len = strlen(fract);
+		s -= len;
+		strlcpy(s, fract, len + 1);
+	} else
+		*s = '\0';
+
+	len = 0;
+
+	if (!num)
+		*--s = '0';
+	if (num < 0) {
+		/* A maximum-size negated number can't fit as a positive,
+		 * so do one digit in negated form to start us off. */
+		*--s = (char)(-(num % 10)) + '0';
+		num = -(num / 10);
+		len++;
+		negated = 1;
+	} else
+		negated = 0;
+
+	while (num) {
+		if (human_flag) {
+			if (len == 3) {
+				*--s = number_separator;
+				len = 1;
+			} else
+				len++;
+		}
+		*--s = (char)(num % 10) + '0';
+		num /= 10;
+	}
+
+	if (negated)
+		*--s = '-';
+
+	return s;
+}
+
+/* Return the double number as a string.  If the human_flag option is > 1,
+ * we may output the number in K, M, G, or T units.  The buffer we use for
+ * our result is either a single static buffer defined here, or a buffer
+ * we get from do_big_num(). */
+char *do_big_dnum(double dnum, int human_flag, int decimal_digits)
+{
+	static char tmp_buf[128];
+#if SIZEOF_INT64 >= 8
+	char *fract;
+
+	snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
+
+	if (!human_flag || (dnum < 1000.0 && dnum > -1000.0))
+		return tmp_buf;
+
+	for (fract = tmp_buf+1; isDigit(fract); fract++) {}
+
+	return do_big_num((int64)dnum, human_flag, fract);
+#else
+	/* A big number might lose digits converting to a too-short int64,
+	 * so let's just return the raw double conversion. */
+	snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
+	return tmp_buf;
+#endif
+}