remove various usages of memset

Signed-off-by: Rosen Penev <rosenp@gmail.com>

app/actions.cpp

@@ -1803,8 +1803,7 @@ int renameFile(std::string& newPath, const struct tm* tm) {
   replace(format, ":parentname:", p.parent_path().parent_path().filename().string());
 
   const size_t max = 1024;
-  char basename[max];
+  char basename[max] = {};
-  std::memset(basename, 0x0, max);
   if (strftime(basename, max, format.c_str(), tm) == 0) {
     std::cerr << _("Filename format yields empty filename for the file") << " " << path << "\n";
     return 1;

samples/exiv2json.cpp

@@ -214,8 +214,7 @@ void fileSystemPush(const char* path, Jzon::Node& nfs) {
   fs.Add("path", path);
   fs.Add("realpath", std::filesystem::absolute(std::filesystem::path(path)).string());
 
-  struct stat buf;
+  struct stat buf = {};
-  memset(&buf, 0, sizeof(buf));
   stat(path, &buf);
 
   fs.Add("st_dev", static_cast<int>(buf.st_dev));     /* ID of device containing file    */

samples/geotag.cpp

@@ -366,8 +366,7 @@ time_t parseTime(const char* arg, bool bAdjust) {
       char a = 0, b = 0, c = 0, d = 0, e = 0;
       sscanf(arg, "%d%c%d%c%d%c%d%c%d%c%d", &YY, &a, &MM, &b, &DD, &c, &HH, &d, &mm, &e, &SS1);
 
-      struct tm T;
+      struct tm T = {};
-      memset(&T, 0, sizeof(T));
       T.tm_min = mm;
       T.tm_hour = HH;
       T.tm_sec = SS1;
@@ -720,8 +719,7 @@ int main(int argc, const char* argv[]) {
   types[typeCode] = "code";
   types[typeFile] = "file";
 
-  char const* keywords[kwMAX];
+  char const* keywords[kwMAX] = {};
-  memset(keywords, 0, sizeof(keywords));
   keywords[kwHELP] = "help";
   keywords[kwVERSION] = "version";
   keywords[kwVERBOSE] = "verbose";

src/crwimage_int.cpp

@@ -949,8 +949,7 @@ void CrwMap::encode0x180e(const Image& image, const CrwMapping* pCrwMapping, Cif
   const ExifKey key(pCrwMapping->tag_, Internal::groupName(pCrwMapping->ifdId_));
   const auto ed = image.exifData().findKey(key);
   if (ed != image.exifData().end()) {
-    struct tm tm;
+    struct tm tm = {};
-    std::memset(&tm, 0x0, sizeof(tm));
     if (exifTime(ed->toString().c_str(), &tm) == 0) {
       t = ::mktime(&tm);
     }

src/futils.cpp

@@ -228,12 +228,10 @@ std::string strError() {
   const size_t n = 1024;
 #ifdef EXV_STRERROR_R_CHAR_P
   char* buf = nullptr;
-  char buf2[n];
+  char buf2[n] = {};
-  std::memset(buf2, 0x0, n);
   buf = strerror_r(error, buf2, n);
 #else
-  char buf[n];
+  char buf[n] = {};
-  std::memset(buf, 0x0, n);
   const int ret = strerror_r(error, buf, n);
   enforce(ret != ERANGE, Exiv2::ErrorCode::kerCallFailed);
 #endif

src/http.cpp

@@ -90,8 +90,7 @@ static int forgive(int n, int& err) {
 
 static int error(std::string& errors, const char* msg, const char* x = nullptr, const char* y = nullptr, int z = 0) {
   static const size_t buffer_size = 512;
-  char buffer[buffer_size];
+  char buffer[buffer_size] = {};
-  memset(buffer, 0, buffer_size);
   snprintf(buffer, buffer_size, msg, x, y, z);
   if (errno) {
     perror(buffer);
@@ -210,9 +209,8 @@ int Exiv2::http(Exiv2::Dictionary& request, Exiv2::Dictionary& response, std::st
   int server = -1;
 
   // fill in the address
-  struct sockaddr_in serv_addr;
+  struct sockaddr_in serv_addr = {};
   int serv_len = sizeof(serv_addr);
-  memset(reinterpret_cast<char*>(&serv_addr), 0, serv_len);
 
   serv_addr.sin_addr.s_addr = inet_addr(servername_p);
   serv_addr.sin_family = AF_INET;

src/value.cpp

@@ -876,8 +876,7 @@ std::ostream& DateValue::write(std::ostream& os) const {
 int64_t DateValue::toInt64(size_t /*n*/) const {
   // Range of tm struct is limited to about 1970 to 2038
   // This will return -1 if outside that range
-  std::tm tms;
+  std::tm tms = {};
-  std::memset(&tms, 0, sizeof(tms));
   tms.tm_mday = date_.day;
   tms.tm_mon = date_.month - 1;
   tms.tm_year = date_.year - 1900;