get rid of strlcpy.h

Don't use hand-rolled string manipulation routine with a fixed
buffer in the bitcoin core, instead make use of c++ strings and boost.

bitcoin-qt.pro

@@ -125,7 +125,6 @@ HEADERS += src/qt/bitcoingui.h \
     src/util.h \
     src/uint256.h \
     src/serialize.h \
-    src/strlcpy.h \
     src/main.h \
     src/net.h \
     src/key.h \

doc/assets-attribution.txt

@@ -1,7 +1,3 @@
-Code: src/strlcpy.h
-Author: Todd C. Miller <Todd.Miller@courtesan.com>
-License: ISC
-
 Icon: src/qt/res/icons/clock*.png, src/qt/res/icons/tx*.png,
       src/qt/res/src/*.svg
 Designer: Wladimir van der Laan

src/irc.cpp

@@ -5,9 +5,10 @@
 
 #include "irc.h"
 #include "net.h"
-#include "strlcpy.h"
 #include "base58.h"
 
+#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
+
 using namespace std;
 using namespace boost;
 
@@ -324,30 +325,27 @@ void ThreadIRCSeed2(void* parg)
             if (vWords.size() < 2)
                 continue;
 
-            char pszName[10000];
-            pszName[0] = '\0';
+            std::string strName;
 
             if (vWords[1] == "352" && vWords.size() >= 8)
             {
                 // index 7 is limited to 16 characters
                 // could get full length name at index 10, but would be different from join messages
-                strlcpy(pszName, vWords[7].c_str(), sizeof(pszName));
+                strName = vWords[7].c_str();
                 printf("IRC got who\n");
             }
 
             if (vWords[1] == "JOIN" && vWords[0].size() > 1)
             {
                 // :username!username@50000007.F000000B.90000002.IP JOIN :#channelname
-                strlcpy(pszName, vWords[0].c_str() + 1, sizeof(pszName));
-                if (strchr(pszName, '!'))
-                    *strchr(pszName, '!') = '\0';
+                strName = vWords[0].substr(1, vWords[0].find('!', 1) - 1);
                 printf("IRC got join\n");
             }
 
-            if (pszName[0] == 'u')
+            if (boost::algorithm::starts_with(strName, "u"))
             {
                 CAddress addr;
-                if (DecodeAddress(pszName, addr))
+                if (DecodeAddress(strName, addr))
                 {
                     addr.nTime = GetAdjustedTime();
                     if (addrman.Add(addr, addrConnect, 51 * 60))

src/net.cpp

@@ -7,7 +7,6 @@
 #include "db.h"
 #include "net.h"
 #include "init.h"
-#include "strlcpy.h"
 #include "addrman.h"
 #include "ui_interface.h"
 

src/netbase.cpp

@@ -10,8 +10,8 @@
 #include <sys/fcntl.h>
 #endif
 
-#include "strlcpy.h"
 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
+#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
 
 using namespace std;
 
@@ -118,18 +118,16 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign
 
 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
 {
-    if (pszName[0] == 0)
+    std::string str(pszName);
+    std::string strHost = str;
+    if (str.empty())
         return false;
-    char psz[256];
-    char *pszHost = psz;
-    strlcpy(psz, pszName, sizeof(psz));
-    if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
+    if (boost::algorithm::starts_with(str, "[") && boost::algorithm::ends_with(str, "]"))
     {
-        pszHost = psz+1;
-        psz[strlen(psz)-1] = 0;
+        strHost = str.substr(1, str.size() - 2);
     }
 
-    return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
+    return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup);
 }
 
 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)

src/strlcpy.h

@@ -1,90 +0,0 @@
-/*
- * 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.
- */
-#ifndef BITCOIN_STRLCPY_H
-#define BITCOIN_STRLCPY_H
-
-#include <stdlib.h>
-#include <string.h>
-
-/*
- * 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.
- */
-inline 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 */
-}
-
-/*
- * 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.
- */
-inline 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 */
-}
-#endif

src/util.cpp

@@ -5,10 +5,11 @@
 
 #include "util.h"
 #include "sync.h"
-#include "strlcpy.h"
 #include "version.h"
 #include "ui_interface.h"
 #include <boost/algorithm/string/join.hpp>
+#include <boost/algorithm/string/case_conv.hpp> // for to_lower()
+#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
 
 // Work around clang compilation problem in Boost 1.46:
 // /usr/include/boost/program_options/detail/config_file.hpp:163:17: error: call to function 'to_internal' that is neither visible in the template definition nor found by argument-dependent lookup
@@ -499,24 +500,24 @@ void ParseParameters(int argc, const char* const argv[])
     mapMultiArgs.clear();
     for (int i = 1; i < argc; i++)
     {
-        char psz[10000];
-        strlcpy(psz, argv[i], sizeof(psz));
-        char* pszValue = (char*)"";
-        if (strchr(psz, '='))
+        std::string str(argv[i]);
+        std::string strValue;
+        size_t is_index = str.find('=');
+        if (is_index != std::string::npos)
         {
-            pszValue = strchr(psz, '=');
-            *pszValue++ = '\0';
+            strValue = str.substr(is_index+1);
+            str = str.substr(0, is_index);
         }
-        #ifdef WIN32
-        _strlwr(psz);
-        if (psz[0] == '/')
-            psz[0] = '-';
-        #endif
-        if (psz[0] != '-')
+#ifdef WIN32
+        boost::to_lower(str);
+        if (boost::algorithm::starts_with(str, "/"))
+            str = "-" + str.substr(1);
+#endif
+        if (str[0] != '-')
             break;
 
-        mapArgs[psz] = pszValue;
-        mapMultiArgs[psz].push_back(pszValue);
+        mapArgs[str] = strValue;
+        mapMultiArgs[str].push_back(strValue);
     }
 
     // New 0.6 features: