wreadln: use `std::string` in various helper functions

diff --git a/src/wreadln.cxx b/src/wreadln.cxx
index 00059a2..399de00 100644 (file)
--- a/src/wreadln.cxx
+++ b/src/wreadln.cxx
@@ -25,6 +25,8 @@
 #include "config.h"
 #include "util/StringUTF8.hxx"
 
+#include <string>
+
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
@@ -88,13 +90,8 @@ byte_to_screen(const char *data, size_t x)
 #if defined(HAVE_CURSES_ENHANCED) || defined(ENABLE_MULTIBYTE)
        assert(x <= strlen(data));
 
-       char *dup = g_strndup(data, x);
-       char *p = replace_locale_to_utf8(dup);
-
-       unsigned width = utf8_width(p);
-       g_free(p);
-
-       return width;
+       const std::string partial(data, x);
+       return utf8_width(LocaleToUtf8(partial.c_str()).c_str());
 #else
        (void)data;
 
@@ -108,21 +105,15 @@ static size_t
 screen_to_bytes(const char *data, unsigned width)
 {
 #if defined(HAVE_CURSES_ENHANCED) || defined(ENABLE_MULTIBYTE)
-       size_t length = strlen(data);
-       char *dup = g_strdup(data);
+       std::string dup(data);
 
        while (true) {
-               dup[length] = 0;
-               unsigned p_width = locale_width(dup);
+               unsigned p_width = locale_width(dup.c_str());
                if (p_width <= width)
-                       break;
+                       return dup.length();
 
-               --length;
+               dup.pop_back();
        }
-
-       g_free(dup);
-
-       return length;
 #else
        (void)data;
 
@@ -150,10 +141,10 @@ right_align_bytes(const char *data, size_t right, unsigned width)
 
        assert(right <= strlen(data));
 
-       char *dup = g_strndup(data, right);
+       const std::string dup(data, right);
 
        while (start < right) {
-               char *p = locale_to_utf8(dup + start);
+               char *p = locale_to_utf8(dup.c_str() + start);
                unsigned p_width = utf8_width(p);
 
                if (p_width < width) {
@@ -168,8 +159,6 @@ right_align_bytes(const char *data, size_t right, unsigned width)
                g_free(p);
        }
 
-       g_free(dup);
-
        return start;
 #else
        (void)data;