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Added IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS / IMGUI_DISABLE_FILE_FUNCTIONS #2734)

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Using in Emscripten example.
This commit is contained in:
omar
2019-11-19 21:14:44 +01:00
parent 93efa5415f
commit 4e90906b04
6 changed files with 91 additions and 29 deletions
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79
imgui.cpp
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@ -46,6 +46,7 @@ CODE
// [SECTION] CONTEXT AND MEMORY ALLOCATORS
// [SECTION] MAIN USER FACING STRUCTURES (ImGuiStyle, ImGuiIO)
// [SECTION] MISC HELPERS/UTILITIES (Maths, String, Format, Hash, File functions)
// [SECTION] MISC HELPERS/UTILITIES (File functions)
// [SECTION] MISC HELPERS/UTILITIES (ImText* functions)
// [SECTION] MISC HELPERS/UTILITIES (Color functions)
// [SECTION] ImGuiStorage
@ -1369,10 +1370,16 @@ ImU32 ImHashStr(const char* data_p, size_t data_size, ImU32 seed)
return ~crc;
}
FILE* ImFileOpen(const char* filename, const char* mode)
//-----------------------------------------------------------------------------
// [SECTION] MISC HELPERS/UTILITIES (File functions)
//-----------------------------------------------------------------------------
// Default file functions
#ifndef IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS
ImFileHandle ImFileOpen(const char* filename, const char* mode)
{
#if defined(_WIN32) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS) && !defined(__CYGWIN__) && !defined(__GNUC__)
// We need a fopen() wrapper because MSVC/Windows fopen doesn't handle UTF-8 filenames. Converting both strings from UTF-8 to wchar format (using a single allocation, because we can)
// We need a fopen() wrapper because MSVC/Windows fopen doesn't handle UTF-8 filenames.
const int filename_wsize = ImTextCountCharsFromUtf8(filename, NULL) + 1;
const int mode_wsize = ImTextCountCharsFromUtf8(mode, NULL) + 1;
ImVector<ImWchar> buf;
@ -1384,43 +1391,47 @@ FILE* ImFileOpen(const char* filename, const char* mode)
return fopen(filename, mode);
#endif
}
int ImFileClose(ImFileHandle f) { return fclose(f); }
size_t ImFileGetSize(ImFileHandle f) { long off = 0, sz = 0; return ((off = ftell(f)) != -1 && !fseek(f, 0, SEEK_END) && (sz = ftell(f)) != -1 && !fseek(f, off, SEEK_SET)) ? (size_t)sz : (size_t)-1; }
size_t ImFileRead(void* data, size_t sz, size_t count, ImFileHandle f) { return fread(data, sz, count, f); }
size_t ImFileWrite(const void* data, size_t sz, size_t count, ImFileHandle f) { return fwrite(data, sz, count, f); }
#endif // #ifndef IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS
// Load file content into memory
// Helper: Load file content into memory
// Memory allocated with IM_ALLOC(), must be freed by user using IM_FREE() == ImGui::MemFree()
void* ImFileLoadToMemory(const char* filename, const char* file_open_mode, size_t* out_file_size, int padding_bytes)
void* ImFileLoadToMemory(const char* filename, const char* mode, size_t* out_file_size, int padding_bytes)
{
IM_ASSERT(filename && file_open_mode);
IM_ASSERT(filename && mode);
if (out_file_size)
*out_file_size = 0;
FILE* f;
if ((f = ImFileOpen(filename, file_open_mode)) == NULL)
ImFileHandle f;
if ((f = ImFileOpen(filename, mode)) == NULL)
return NULL;
long file_size_signed;
if (fseek(f, 0, SEEK_END) || (file_size_signed = ftell(f)) == -1 || fseek(f, 0, SEEK_SET))
size_t file_size = ImFileGetSize(f);
if (file_size == (size_t)-1)
{
fclose(f);
ImFileClose(f);
return NULL;
}
size_t file_size = (size_t)file_size_signed;
void* file_data = IM_ALLOC(file_size + padding_bytes);
if (file_data == NULL)
{
fclose(f);
ImFileClose(f);
return NULL;
}
if (fread(file_data, 1, file_size, f) != file_size)
if (ImFileRead(file_data, 1, file_size, f) != file_size)
{
fclose(f);
ImFileClose(f);
IM_FREE(file_data);
return NULL;
}
if (padding_bytes > 0)
memset((void*)(((char*)file_data) + file_size), 0, (size_t)padding_bytes);
fclose(f);
ImFileClose(f);
if (out_file_size)
*out_file_size = file_size;
@ -3822,9 +3833,12 @@ void ImGui::Shutdown(ImGuiContext* context)
g.SettingsWindows.clear();
g.SettingsHandlers.clear();
if (g.LogFile && g.LogFile != stdout)
if (g.LogFile)
{
fclose(g.LogFile);
#ifndef IMGUI_DISABLE_TTY_FUNCTIONS
if (g.LogFile != stdout)
#endif
ImFileClose(g.LogFile);
g.LogFile = NULL;
}
g.LogBuffer.clear();
@ -9055,9 +9069,15 @@ void ImGui::LogText(const char* fmt, ...)
va_list args;
va_start(args, fmt);
if (g.LogFile)
vfprintf(g.LogFile, fmt, args);
else
{
g.LogBuffer.Buf.resize(0);
g.LogBuffer.appendfv(fmt, args);
ImFileWrite(g.LogBuffer.c_str(), sizeof(char), (size_t)g.LogBuffer.size(), g.LogFile);
}
else
{
g.LogBuffer.appendfv(fmt, args);
}
va_end(args);
}
@ -9134,8 +9154,11 @@ void ImGui::LogToTTY(int auto_open_depth)
ImGuiContext& g = *GImGui;
if (g.LogEnabled)
return;
IM_UNUSED(auto_open_depth);
#ifndef IMGUI_DISABLE_TTY_FUNCTIONS
LogBegin(ImGuiLogType_TTY, auto_open_depth);
g.LogFile = stdout;
#endif
}
// Start logging/capturing text output to given file
@ -9152,8 +9175,8 @@ void ImGui::LogToFile(int auto_open_depth, const char* filename)
filename = g.IO.LogFilename;
if (!filename || !filename[0])
return;
FILE* f = ImFileOpen(filename, "ab");
if (f == NULL)
ImFileHandle f = ImFileOpen(filename, "ab");
if (!f)
{
IM_ASSERT(0);
return;
@ -9190,10 +9213,12 @@ void ImGui::LogFinish()
switch (g.LogType)
{
case ImGuiLogType_TTY:
#ifndef IMGUI_DISABLE_TTY_FUNCTIONS
fflush(g.LogFile);
#endif
break;
case ImGuiLogType_File:
fclose(g.LogFile);
ImFileClose(g.LogFile);
break;
case ImGuiLogType_Buffer:
break;
@ -9219,7 +9244,11 @@ void ImGui::LogButtons()
ImGuiContext& g = *GImGui;
PushID("LogButtons");
#ifndef IMGUI_DISABLE_TTY_FUNCTIONS
const bool log_to_tty = Button("Log To TTY"); SameLine();
#else
const bool log_to_tty = false;
#endif
const bool log_to_file = Button("Log To File"); SameLine();
const bool log_to_clipboard = Button("Log To Clipboard"); SameLine();
PushAllowKeyboardFocus(false);
@ -9379,11 +9408,11 @@ void ImGui::SaveIniSettingsToDisk(const char* ini_filename)
size_t ini_data_size = 0;
const char* ini_data = SaveIniSettingsToMemory(&ini_data_size);
FILE* f = ImFileOpen(ini_filename, "wt");
ImFileHandle f = ImFileOpen(ini_filename, "wt");
if (!f)
return;
fwrite(ini_data, sizeof(char), ini_data_size, f);
fclose(f);
ImFileWrite(ini_data, sizeof(char), ini_data_size, f);
ImFileClose(f);
}
// Call registered handlers (e.g. SettingsHandlerWindow_WriteAll() + custom handlers) to write their stuff into a text buffer