visuals and a lot of other things

src/settings.cpp

@@ -0,0 +1,161 @@
+#include "settings.h"
+
+static void _settings_setting_load(Settings* self, char* line);
+static void _settings_setting_write(Settings* self, SDL_IOStream* io, SettingsItem type);
+
+/* Load a particular settings from a line */
+static void
+_settings_setting_load(Settings* self, char* line)
+{
+    for (int i = 0; i < SETTINGS_COUNT; i++) 
+    {
+        if (strncmp(line, SETTINGS_ENTRIES[i].value, strlen(SETTINGS_ENTRIES[i].value)) == 0) 
+        {
+            char* value = line + strlen(SETTINGS_ENTRIES[i].value);
+            void* target = (u8*)self + SETTINGS_ENTRIES[i].offset;
+
+
+            switch (SETTINGS_ENTRIES[i].type) 
+            {
+                case SETTINGS_TYPE_INT:
+                case SETTINGS_TYPE_BOOL:
+                    *(s32*)target = atoi(value);
+                    break;
+                case SETTINGS_TYPE_FLOAT:
+                    *(f32*)target = atof(value);
+                    break;
+                case SETTINGS_TYPE_STRING:
+                    strncpy((char*)target, value, SETTINGS_BUFFER_ITEM - 1);
+                    ((char*)target)[SETTINGS_BUFFER_ITEM - 1] = '\0'; 
+                    break;
+                default:
+                    break;
+            }
+            return; 
+        }
+    }
+}
+
+/* Writes a particular setting to the current IO */
+static void
+_settings_setting_write(Settings* self, SDL_IOStream* io, SettingsItem type)
+{
+    char valueBuffer[SETTINGS_BUFFER_ITEM];
+    SettingsEntry entry = SETTINGS_ENTRIES[type];
+
+    u8* selfPointer = (u8*)self;
+    
+    memset(valueBuffer, '\0', sizeof(valueBuffer));
+
+    switch (entry.type)
+    {
+        case SETTINGS_TYPE_INT:
+            snprintf(valueBuffer, SETTINGS_BUFFER_ITEM, entry.format, *(s32*)(selfPointer + entry.offset));
+            break;
+        case SETTINGS_TYPE_BOOL:
+            snprintf(valueBuffer, SETTINGS_BUFFER_ITEM, entry.format, *(bool*)(selfPointer + entry.offset));
+            break;
+       case SETTINGS_TYPE_FLOAT:
+            snprintf(valueBuffer, SETTINGS_BUFFER_ITEM, entry.format, *(f32*)(selfPointer + entry.offset));
+            break;
+        case SETTINGS_TYPE_STRING:
+            snprintf(valueBuffer, SETTINGS_BUFFER_ITEM, entry.value, entry.format, *(char*)(selfPointer + entry.offset));
+            break;
+        default:
+            break;
+    }
+
+    SDL_WriteIO(io, valueBuffer, strlen(valueBuffer));
+    SDL_WriteIO(io, "\n", strlen("\n"));
+}
+
+/* Saves the program's settings to the PATH_SETTINGS file */
+void
+settings_save(Settings* self)
+{
+    char buffer[SETTINGS_BUFFER];
+
+    /* Get the original settings.ini buffer (as previously saved by imgui before this is called) */
+	memset(buffer, '\0', SETTINGS_BUFFER);
+
+	SDL_IOStream* io = SDL_IOFromFile(PATH_SETTINGS, "r");
+
+	if (!io)
+	{
+		printf(STRING_ERROR_SETTINGS_INIT, PATH_SETTINGS);
+		return;
+	}
+
+	SDL_ReadIO(io, buffer, SETTINGS_BUFFER);
+	SDL_CloseIO(io);
+
+	io = SDL_IOFromFile(PATH_SETTINGS, "w");
+    
+    if (!io)
+    {
+        printf(STRING_ERROR_SETTINGS_INIT, PATH_SETTINGS);
+        return;
+    }
+
+    /* [Settings] */
+    SDL_WriteIO(io, SETTINGS_SECTION, strlen(SETTINGS_SECTION));
+    SDL_WriteIO(io, "\n", strlen("\n"));
+
+    /* Write down all elements */
+    for (s32 i = 0; i < SETTINGS_COUNT; i++)
+        _settings_setting_write(self, io, (SettingsItem)i);
+
+    SDL_WriteIO(io, "\n", strlen("\n"));
+
+    /* specify that the other settings are imgui */
+    SDL_WriteIO(io, SETTINGS_SECTION_IMGUI, strlen(SETTINGS_SECTION_IMGUI));
+    SDL_WriteIO(io, "\n", strlen("\n"));
+
+    /* Then write original contents */
+    SDL_WriteIO(io, buffer, strlen(buffer));
+    SDL_CloseIO(io);
+}
+
+/* Loads the settings from the PATH_SETTINGS file */
+void
+settings_load(Settings* self)
+{
+    char buffer[SETTINGS_BUFFER];
+    char* line = NULL;
+
+	memset(buffer, '\0', SETTINGS_BUFFER);
+
+    SDL_IOStream* io = SDL_IOFromFile(PATH_SETTINGS, "r");
+
+	if (!io)
+	{
+		printf(STRING_ERROR_SETTINGS_INIT, PATH_SETTINGS);
+		return;
+	}
+
+	size_t bytesRead = SDL_ReadIO(io, buffer, SETTINGS_BUFFER);
+    SDL_CloseIO(io);
+
+    buffer[bytesRead] = '\0';
+
+    line = strtok(buffer, "\n");
+
+    /* The settings will be the first section in the file */
+    /* Go through its elements, load them to settings, and go on with your day */
+    while (line != NULL)
+    {
+        if (strcmp(line, SETTINGS_SECTION) == 0)
+        {
+            line = strtok(NULL, "\n");
+            continue;
+        }
+            
+        _settings_setting_load(self, line);
+
+        /* get out here */
+        if (strcmp(line, SETTINGS_SECTION_IMGUI) == 0)
+            break;
+
+        line = strtok(NULL, "\n");
+    }
+}