Removed direct dependency on sprintf() in imgui.cpp (#1038)

(NB: imgui_demo stills uses it)

imgui.cpp

@@ -9502,16 +9502,16 @@ void ImGui::ColorEditOptionsPopup(const float* col, ImGuiColorEditFlags flags)
     {
         int cr = IM_F32_TO_INT8_SAT(col[0]), cg = IM_F32_TO_INT8_SAT(col[1]), cb = IM_F32_TO_INT8_SAT(col[2]), ca = (flags & ImGuiColorEditFlags_NoAlpha) ? 255 : IM_F32_TO_INT8_SAT(col[3]);
         char buf[64];
-        sprintf(buf, "(%.3ff, %.3ff, %.3ff, %.3ff)", col[0], col[1], col[2], (flags & ImGuiColorEditFlags_NoAlpha) ? 1.0f : col[3]);
+        ImFormatString(buf, IM_ARRAYSIZE(buf), "(%.3ff, %.3ff, %.3ff, %.3ff)", col[0], col[1], col[2], (flags & ImGuiColorEditFlags_NoAlpha) ? 1.0f : col[3]);
         if (Selectable(buf))
             SetClipboardText(buf);
-        sprintf(buf, "(%d,%d,%d,%d)", cr, cg, cb, ca);
+        ImFormatString(buf, IM_ARRAYSIZE(buf), "(%d,%d,%d,%d)", cr, cg, cb, ca);
         if (Selectable(buf))
             SetClipboardText(buf);
         if (flags & ImGuiColorEditFlags_NoAlpha)
-            sprintf(buf, "0x%02X%02X%02X", cr, cg, cb);
+            ImFormatString(buf, IM_ARRAYSIZE(buf), "0x%02X%02X%02X", cr, cg, cb);
         else
-            sprintf(buf, "0x%02X%02X%02X%02X", cr, cg, cb, ca);
+            ImFormatString(buf, IM_ARRAYSIZE(buf), "0x%02X%02X%02X%02X", cr, cg, cb, ca);
         if (Selectable(buf))
             SetClipboardText(buf);
         EndPopup();
@@ -10789,13 +10789,14 @@ void ImGui::ShowMetricsWindow(bool* p_open)
                     while (clipper.Step())
                         for (int prim = clipper.DisplayStart, vtx_i = elem_offset + clipper.DisplayStart*3; prim < clipper.DisplayEnd; prim++)
                         {
-                            char buf[300], *buf_p = buf;
+                            char buf[300];
+                            char *buf_p = buf, *buf_end = buf + IM_ARRAYSIZE(buf);
                             ImVec2 triangles_pos[3];
                             for (int n = 0; n < 3; n++, vtx_i++)
                             {
                                 ImDrawVert& v = draw_list->VtxBuffer[idx_buffer ? idx_buffer[vtx_i] : vtx_i];
                                 triangles_pos[n] = v.pos;
-                                buf_p += sprintf(buf_p, "%s %04d { pos = (%8.2f,%8.2f), uv = (%.6f,%.6f), col = %08X }\n", (n == 0) ? "vtx" : "   ", vtx_i, v.pos.x, v.pos.y, v.uv.x, v.uv.y, v.col);
+                                buf_p += ImFormatString(buf_p, (int)(buf_end - buf_p), "%s %04d { pos = (%8.2f,%8.2f), uv = (%.6f,%.6f), col = %08X }\n", (n == 0) ? "vtx" : "   ", vtx_i, v.pos.x, v.pos.y, v.uv.x, v.uv.y, v.col);
                             }
                             ImGui::Selectable(buf, false);
                             if (ImGui::IsItemHovered())