Add strlcat() and strlcpy(), might convert to them in the future

src/common/Makefile.am

@@ -28,6 +28,7 @@ EXTRA_DIST = \
 	servlist.h \
 	ssl.h \
 	ssl.c	\
+	strlutil.c \
 	text.h \
 	textenums.h \
 	textevents.h \
@@ -54,7 +55,7 @@ SUBDIRS = $(dbusdir) .
 libxchatcommon_a_SOURCES = cfgfiles.c chanopt.c ctcp.c dcc.c history.c ignore.c \
 	inbound.c modes.c msproxy.c network.c notify.c outbound.c \
 	plugin.c plugin-timer.c proto-irc.c server.c servlist.c $(ssl_c) \
-	text.c tree.c url.c userlist.c util.c xchat.c
+	strlutil.c text.c tree.c url.c userlist.c util.c xchat.c
 libxchatcommon_a_CFLAGS = $(LIBPROXY_CFLAGS)
 
 textevents: make-te

src/common/common.vcxproj

@@ -33,6 +33,7 @@
     <ClInclude Include="server.h" />
     <ClInclude Include="servlist.h" />
     <ClInclude Include="ssl.h" />
+    <ClInclude Include="strlutil.h" />
     <ClInclude Include="text.h" />
     <ClInclude Include="textenums.h" />
     <ClInclude Include="textevents.h" />
@@ -65,6 +66,7 @@
     <ClCompile Include="server.c" />
     <ClCompile Include="servlist.c" />
     <ClCompile Include="ssl.c" />
+    <ClCompile Include="strlutil.c" />
     <ClCompile Include="text.c" />
     <ClCompile Include="thread.c" />
     <ClCompile Include="tree.c" />

src/common/common.vcxproj.filters

@@ -110,6 +110,9 @@
     <ClInclude Include="..\..\config.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="strlutil.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="cfgfiles.c">
@@ -190,5 +193,8 @@
     <ClCompile Include="xchat.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="strlutil.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>

src/common/strlutil.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+	size_t dlen;
+
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = siz - dlen;
+
+	if (n == 0)
+		return(dlen + strlen(s));
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+
+	return(dlen + (s - src));	/* count does not include NUL */
+}
+
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0) {
+		while (--n != 0) {
+			if ((*d++ = *s++) == '\0')
+				break;
+		}
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}

src/common/strlutil.h

@@ -0,0 +1,2 @@
+size_t strlcat(char *dst, const char *src, size_t siz);
+size_t strlcpy(char *dst, const char *src, size_t siz);

src/common/util.h

@@ -14,6 +14,7 @@
 #ifndef XCHAT_UTIL_H
 #define XCHAT_UTIL_H
 
+#include "strlutil.h"
 #define rfc_tolower(c) (rfc_tolowertab[(unsigned char)(c)])
 
 extern const unsigned char rfc_tolowertab[];