Super Mario 64 OpenGL port for PC. Mirror of https://github.com/sm64pc/sm64pc https://github.com/sm64pc/sm64pc
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

263 lines
9.2 KiB

// configfile.c - handles loading and saving the configuration options
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include "configfile.h"
#define ARRAY_LEN(arr) (sizeof(arr) / sizeof(arr[0]))
enum ConfigOptionType {
CONFIG_TYPE_BOOL,
CONFIG_TYPE_UINT,
CONFIG_TYPE_FLOAT,
};
struct ConfigOption {
const char *name;
enum ConfigOptionType type;
union {
bool *boolValue;
unsigned int *uintValue;
float *floatValue;
};
};
/*
*Config options and default values
*/
bool configFullscreen = false;
// Keyboard mappings (scancode values)
unsigned int configKeyA = 0x26;
unsigned int configKeyB = 0x33;
unsigned int configKeyStart = 0x39;
unsigned int configKeyL = 0x34;
unsigned int configKeyR = 0x36;
unsigned int configKeyZ = 0x25;
unsigned int configKeyCUp = 0x148;
unsigned int configKeyCDown = 0x150;
unsigned int configKeyCLeft = 0x14B;
unsigned int configKeyCRight = 0x14D;
unsigned int configKeyStickUp = 0x11;
unsigned int configKeyStickDown = 0x1F;
unsigned int configKeyStickLeft = 0x1E;
unsigned int configKeyStickRight = 0x20;
// Gamepad mappings (SDL_GameControllerButton values)
unsigned int configJoyA = 0;
unsigned int configJoyB = 2;
unsigned int configJoyStart = 6;
unsigned int configJoyL = 7;
unsigned int configJoyR = 10;
unsigned int configJoyZ = 9;
// Mouse button mappings (0 for none, 1 for left, 2 for middle, 3 for right)
unsigned int configMouseA = 3;
unsigned int configMouseB = 1;
unsigned int configMouseL = 4;
unsigned int configMouseR = 5;
unsigned int configMouseZ = 2;
static const struct ConfigOption options[] = {
{.name = "fullscreen", .type = CONFIG_TYPE_BOOL, .boolValue = &configFullscreen},
{.name = "key_a", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyA},
{.name = "key_b", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyB},
{.name = "key_start", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyStart},
{.name = "key_l", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyL},
{.name = "key_r", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyR},
{.name = "key_z", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyZ},
{.name = "key_cup", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyCUp},
{.name = "key_cdown", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyCDown},
{.name = "key_cleft", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyCLeft},
{.name = "key_cright", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyCRight},
{.name = "key_stickup", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyStickUp},
{.name = "key_stickdown", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyStickDown},
{.name = "key_stickleft", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyStickLeft},
{.name = "key_stickright", .type = CONFIG_TYPE_UINT, .uintValue = &configKeyStickRight},
{.name = "joy_a", .type = CONFIG_TYPE_UINT, .uintValue = &configJoyA},
{.name = "joy_b", .type = CONFIG_TYPE_UINT, .uintValue = &configJoyB},
{.name = "joy_start", .type = CONFIG_TYPE_UINT, .uintValue = &configJoyStart},
{.name = "joy_l", .type = CONFIG_TYPE_UINT, .uintValue = &configJoyL},
{.name = "joy_r", .type = CONFIG_TYPE_UINT, .uintValue = &configJoyR},
{.name = "joy_z", .type = CONFIG_TYPE_UINT, .uintValue = &configJoyZ},
{.name = "mouse_a", .type = CONFIG_TYPE_UINT, .uintValue = &configMouseA},
{.name = "mouse_b", .type = CONFIG_TYPE_UINT, .uintValue = &configMouseB},
{.name = "mouse_l", .type = CONFIG_TYPE_UINT, .uintValue = &configMouseL},
{.name = "mouse_r", .type = CONFIG_TYPE_UINT, .uintValue = &configMouseR},
{.name = "mouse_z", .type = CONFIG_TYPE_UINT, .uintValue = &configMouseZ},
};
// Reads an entire line from a file (excluding the newline character) and returns an allocated string
// Returns NULL if no lines could be read from the file
static char *read_file_line(FILE *file) {
char *buffer;
size_t bufferSize = 8;
size_t offset = 0; // offset in buffer to write
buffer = malloc(bufferSize);
while (1) {
// Read a line from the file
if (fgets(buffer + offset, bufferSize - offset, file) == NULL) {
free(buffer);
return NULL; // Nothing could be read.
}
offset = strlen(buffer);
assert(offset > 0);
// If a newline was found, remove the trailing newline and exit
if (buffer[offset - 1] == '\n') {
buffer[offset - 1] = '\0';
break;
}
if (feof(file)) // EOF was reached
break;
// If no newline or EOF was reached, then the whole line wasn't read.
bufferSize *= 2; // Increase buffer size
buffer = realloc(buffer, bufferSize);
assert(buffer != NULL);
}
return buffer;
}
// Returns the position of the first non-whitespace character
static char *skip_whitespace(char *str) {
while (isspace(*str))
str++;
return str;
}
// NULL-terminates the current whitespace-delimited word, and returns a pointer to the next word
static char *word_split(char *str) {
// Precondition: str must not point to whitespace
assert(!isspace(*str));
// Find either the next whitespace char or end of string
while (!isspace(*str) && *str != '\0')
str++;
if (*str == '\0') // End of string
return str;
// Terminate current word
*(str++) = '\0';
// Skip whitespace to next word
return skip_whitespace(str);
}
// Splits a string into words, and stores the words into the 'tokens' array
// 'maxTokens' is the length of the 'tokens' array
// Returns the number of tokens parsed
static unsigned int tokenize_string(char *str, int maxTokens, char **tokens) {
int count = 0;
str = skip_whitespace(str);
while (str[0] != '\0' && count < maxTokens) {
tokens[count] = str;
str = word_split(str);
count++;
}
return count;
}
// Loads the config file specified by 'filename'
void configfile_load(const char *filename) {
FILE *file;
char *line;
printf("Loading configuration from '%s'\n", filename);
file = fopen(filename, "r");
if (file == NULL) {
// Create a new config file and save defaults
printf("Config file '%s' not found. Creating it.\n", filename);
configfile_save(filename);
return;
}
// Go through each line in the file
while ((line = read_file_line(file)) != NULL) {
char *p = line;
char *tokens[2];
int numTokens;
while (isspace(*p))
p++;
numTokens = tokenize_string(p, 2, tokens);
if (numTokens != 0) {
if (numTokens == 2) {
const struct ConfigOption *option = NULL;
for (unsigned int i = 0; i < ARRAY_LEN(options); i++) {
if (strcmp(tokens[0], options[i].name) == 0) {
option = &options[i];
break;
}
}
if (option == NULL)
printf("unknown option '%s'\n", tokens[0]);
else {
switch (option->type) {
case CONFIG_TYPE_BOOL:
if (strcmp(tokens[1], "true") == 0)
*option->boolValue = true;
else if (strcmp(tokens[1], "false") == 0)
*option->boolValue = false;
break;
case CONFIG_TYPE_UINT:
sscanf(tokens[1], "%u", option->uintValue);
break;
case CONFIG_TYPE_FLOAT:
sscanf(tokens[1], "%f", option->floatValue);
break;
default:
assert(0); // bad type
}
printf("option: '%s', value: '%s'\n", tokens[0], tokens[1]);
}
} else
puts("error: expected value");
}
free(line);
}
fclose(file);
}
// Writes the config file to 'filename'
void configfile_save(const char *filename) {
FILE *file;
printf("Saving configuration to '%s'\n", filename);
file = fopen(filename, "w");
if (file == NULL) {
// error
return;
}
for (unsigned int i = 0; i < ARRAY_LEN(options); i++) {
const struct ConfigOption *option = &options[i];
switch (option->type) {
case CONFIG_TYPE_BOOL:
fprintf(file, "%s %s\n", option->name, *option->boolValue ? "true" : "false");
break;
case CONFIG_TYPE_UINT:
fprintf(file, "%s %u\n", option->name, *option->uintValue);
break;
case CONFIG_TYPE_FLOAT:
fprintf(file, "%s %f\n", option->name, *option->floatValue);
break;
default:
assert(0); // unknown type
}
}
fclose(file);
}