Changed ImTextCharToUtf8() to return bytes count rather than original pointer. (#8820)

Amend c2bf4abfa12

imgui.cpp

@@ -2582,11 +2582,11 @@ static inline int ImTextCharToUtf8_inline(char* buf, int buf_size, unsigned int
     return 0;
 }
 
-const char* ImTextCharToUtf8(char out_buf[5], unsigned int c)
+int ImTextCharToUtf8(char out_buf[5], unsigned int c)
 {
     int count = ImTextCharToUtf8_inline(out_buf, 5, c);
     out_buf[count] = 0;
-    return out_buf;
+    return count;
 }
 
 // Not optimal but we very rarely use this function.
@@ -16922,8 +16922,10 @@ void ImGui::DebugNodeFont(ImFont* font)
 #endif
 
     char c_str[5];
-    Text("Fallback character: '%s' (U+%04X)", ImTextCharToUtf8(c_str, font->FallbackChar), font->FallbackChar);
-    Text("Ellipsis character: '%s' (U+%04X)", ImTextCharToUtf8(c_str, font->EllipsisChar), font->EllipsisChar);
+    ImTextCharToUtf8(c_str, font->FallbackChar);
+    Text("Fallback character: '%s' (U+%04X)", c_str, font->FallbackChar);
+    ImTextCharToUtf8(c_str, font->EllipsisChar);
+    Text("Ellipsis character: '%s' (U+%04X)", c_str, font->EllipsisChar);
 
     for (int src_n = 0; src_n < font->Sources.Size; src_n++)
     {
@@ -16965,7 +16967,10 @@ void ImGui::DebugNodeFont(ImFont* font)
                     {
                         char utf8_buf[5];
                         for (unsigned int n = c; n < c_end; n++)
-                            BulletText("Codepoint U+%04X (%s)", n, ImTextCharToUtf8(utf8_buf, n));
+                        {
+                            ImTextCharToUtf8(utf8_buf, n);
+                            BulletText("Codepoint U+%04X (%s)", n, utf8_buf);
+                        }
                         TreePop();
                     }
                     TableNextColumn();

imgui.h

@@ -29,7 +29,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
 #define IMGUI_VERSION       "1.92.2 WIP"
-#define IMGUI_VERSION_NUM   19211
+#define IMGUI_VERSION_NUM   19212
 #define IMGUI_HAS_TABLE             // Added BeginTable() - from IMGUI_VERSION_NUM >= 18000
 #define IMGUI_HAS_TEXTURES          // Added ImGuiBackendFlags_RendererHasTextures - from IMGUI_VERSION_NUM >= 19198
 

imgui_internal.h

@@ -417,7 +417,7 @@ IMGUI_API const char*   ImParseFormatSanitizeForScanning(const char* fmt_in, cha
 IMGUI_API int           ImParseFormatPrecision(const char* format, int default_value);
 
 // Helpers: UTF-8 <> wchar conversions
-IMGUI_API const char*   ImTextCharToUtf8(char out_buf[5], unsigned int c);                                                      // return out_buf
+IMGUI_API int           ImTextCharToUtf8(char out_buf[5], unsigned int c);                                                      // return output UTF-8 bytes count
 IMGUI_API int           ImTextStrToUtf8(char* out_buf, int out_buf_size, const ImWchar* in_text, const ImWchar* in_text_end);   // return output UTF-8 bytes count
 IMGUI_API int           ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end);               // read one character. return input UTF-8 bytes count
 IMGUI_API int           ImTextStrFromUtf8(ImWchar* out_buf, int out_buf_size, const char* in_text, const char* in_text_end, const char** in_remaining = NULL);   // return input UTF-8 bytes count