replace find/rfind with startsWith

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

src/futils.cpp

@@ -6,6 +6,7 @@
 #include "config.h"
 #include "enforce.hpp"
 #include "error.hpp"
+#include "utils.hpp"
 
 // + standard includes
 #include <algorithm>
@@ -205,7 +206,7 @@ Protocol fileProtocol(const std::string& path) {
     if (result != pFile)
       break;
 
-    if (path.rfind(prot.name, 0) == 0)
+    if (Exiv2::Internal::startsWith(path, prot.name))
       // URL's require data.  Stdin == "-" and no further data
       if (prot.isUrl ? path.size() > prot.name.size() : path.size() == prot.name.size())
         result = prot.prot;

src/jpgimage.cpp

@@ -11,6 +11,7 @@
 #include "jpgimage.hpp"
 #include "photoshop.hpp"
 #include "safe_op.hpp"
+#include "utils.hpp"
 
 #ifdef _WIN32
 #include <windows.h>
@@ -30,6 +31,7 @@
 
 namespace Exiv2 {
 
+using Exiv2::Internal::startsWith;
 namespace {
 // JPEG Segment markers (The first byte is always 0xFF, the value of these constants correspond to the 2nd byte)
 constexpr byte sos_ = 0xda;    //!< JPEG SOS marker
@@ -371,7 +373,7 @@ void JpegBase::printStructure(std::ostream& out, PrintStructureOption option, si
         //       2 | 0xe1 APP1  |     911 | Exif..MM.*.......%.........#....
         //     915 | 0xe1 APP1  |     870 | http://ns.adobe.com/xap/1.0/.<x:
         //    1787 | 0xe1 APP1  |   65460 | http://ns.adobe.com/xmp/extensio
-        if (option == kpsXMP && signature.rfind("http://ns.adobe.com/x", 0) == 0) {
+        if (option == kpsXMP && startsWith(signature, "http://ns.adobe.com/x")) {
           // extract XMP
           const char* xmp = buf.c_str();
           size_t start = 2;

src/pentaxmn_int.cpp

@@ -7,6 +7,7 @@
 #include "makernote_int.hpp"
 #include "tags.hpp"
 #include "types.hpp"
+#include "utils.hpp"
 #include "value.hpp"
 
 #include <array>
@@ -1178,7 +1179,7 @@ std::ostream& resolveLens0x8ff(std::ostream& os, const Value& value, const ExifD
     const auto lensInfo = findLensInfo(metadata);
     if (value.count() == 4) {
       std::string model = getKeyString("Exif.Image.Model", metadata);
-      if (model.rfind("PENTAX K-3", 0) == 0 && lensInfo->count() == 128 && lensInfo->toUint32(1) == 168 &&
+      if (startsWith(model, "PENTAX K-3") && lensInfo->count() == 128 && lensInfo->toUint32(1) == 168 &&
           lensInfo->toUint32(2) == 144)
         index = 7;
     }
@@ -1205,15 +1206,15 @@ std::ostream& resolveLens0x319(std::ostream& os, const Value& value, const ExifD
     const auto lensInfo = findLensInfo(metadata);
     if (value.count() == 4) {
       std::string model = getKeyString("Exif.Image.Model", metadata);
-      if (model.rfind("PENTAX K-3", 0) == 0 && lensInfo->count() == 128 && lensInfo->toUint32(1) == 131 &&
+      if (startsWith(model, "PENTAX K-3") && lensInfo->count() == 128 && lensInfo->toUint32(1) == 131 &&
           lensInfo->toUint32(2) == 128)
         index = 6;
     }
     if (value.count() == 2) {
       std::string model = getKeyString("Exif.Image.Model", metadata);
-      if (model.rfind("PENTAX K100D", 0) == 0 && lensInfo->count() == 44)
+      if (startsWith(model, "PENTAX K100D") && lensInfo->count() == 44)
         index = 6;
-      if (model.rfind("PENTAX *ist DL", 0) == 0 && lensInfo->count() == 36)
+      if (startsWith(model, "PENTAX *ist DL") && lensInfo->count() == 36)
         index = 6;
     }
 

src/sonymn_int.cpp

@@ -1862,7 +1862,7 @@ std::ostream& SonyMakerNote::printSony2FpFocusPosition2(std::ostream& os, const
 
     // Ranges of models that do not support this tag
     for (auto& m : {"DSC-", "Stellar"}) {
-      if (model.find(m) == 0) {
+      if (startsWith(model, m)) {
         os << N_("n/a");
         return os;
       }

src/xmp.cpp

@@ -4,6 +4,7 @@
 #include "error.hpp"
 #include "properties.hpp"
 #include "types.hpp"
+#include "utils.hpp"
 #include "value.hpp"
 #include "xmp_exiv2.hpp"
 
@@ -494,7 +495,7 @@ void XmpData::eraseFamily(XmpData::iterator& pos) {
   std::string key(pos->key());
   std::vector<std::string> keys;
   while (pos != xmpMetadata_.end()) {
-    if (pos->key().find(key) == 0) {
+    if (Exiv2::Internal::startsWith(pos->key(), key)) {
       keys.push_back(pos->key());
       pos++;
     } else {