feat: get rom paths from configuration file

Author: giuliof

src/bios.c

@@ -1,5 +1,6 @@
 #include "bios.h"
 
+#include "conf.h"
 #include "units.h"
 
 #include <stdio.h>
@@ -13,7 +14,18 @@
 static zuint8 bios[ROM_BIOS_SIZE] = {0};
 
 void rom_bios_init(void) {
-    FILE *fp = fopen(ROM_BIOS_PATH, "rb");
+    const char *rom_path = ROM_BIOS_PATH;
+    const char *rom_path_cfg = conf_getString("path", "bios_rom");
+
+    if (rom_path_cfg != NULL)
+        rom_path = rom_path_cfg;
+
+    LOG_INFO("Loading BIOS rom from %s\n\r", rom_path);
+
+    FILE *fp = fopen(rom_path, "rb");
+
+    LOG_INFO("%s\n\r", rom_path);
+
     if (fp == NULL) {
         LOG_ERR("missing bios rom file\n");
         abort();

src/conf.c

@@ -21,7 +21,12 @@ static const char *CONF_PATH_HOME =
 #include "log.h"
 
 // Emulator dynamic configuration
-static struct { bool cge_installed; } conf;
+static struct {
+    bool cge_installed;
+    ceda_string_t *bios_rom_path;
+    ceda_string_t *char_rom_path;
+    ceda_string_t *cge_rom_path;
+} conf;
 
 typedef enum conf_type_t {
     CONF_NONE,
@@ -41,6 +46,9 @@ typedef struct conf_tuple_t {
 
 static conf_tuple_t conf_tuples[] = {
     {"mod", "cge_installed", CONF_BOOL, &conf.cge_installed},
+    {"path", "bios_rom", CONF_STR, &conf.bios_rom_path},
+    {"path", "char_rom", CONF_STR, &conf.char_rom_path},
+    {"path", "cge_rom", CONF_STR, &conf.cge_rom_path},
     {NULL, NULL, CONF_NONE, NULL},
 };
 
@@ -192,6 +200,15 @@ bool *conf_getBool(const char *section, const char *key) {
     return conf_getType(conf_tuples, section, key, CONF_BOOL);
 }
 
+const char *conf_getString(const char *section, const char *key) {
+    ceda_string_t **string = conf_getType(conf_tuples, section, key, CONF_STR);
+
+    if (string == NULL || *string == NULL)
+        return NULL;
+
+    return ceda_string_data(*string);
+}
+
 #if defined(CEDA_TEST)
 
 #include "hexdump.h"

src/video.c

@@ -321,7 +321,16 @@ void video_init(CEDAModule *mod) {
 
     // load character generator rom
     {
-        FILE *fp = fopen(CHAR_ROM_PATH, "rb");
+        const char *rom_path = CHAR_ROM_PATH;
+        const char *rom_path_cfg = conf_getString("path", "char_rom");
+
+        if (rom_path_cfg != NULL)
+            rom_path = rom_path_cfg;
+
+        LOG_INFO("Loading char rom from %s\n\r", rom_path);
+
+        FILE *fp = fopen(rom_path, "rb");
+
         if (fp == NULL) {
             LOG_ERR("missing char rom file\n");
             abort();
@@ -345,7 +354,16 @@ void video_init(CEDAModule *mod) {
         cge_installed = *conf_cge_installed;
 
     if (cge_installed) {
-        FILE *fp = fopen(CGE_ROM_PATH, "rb");
+        const char *rom_path = CGE_ROM_PATH;
+        const char *rom_path_cfg = conf_getString("path", "cge_rom");
+
+        if (rom_path_cfg != NULL)
+            rom_path = rom_path_cfg;
+
+        LOG_INFO("Loading CGE rom from %s\n\r", rom_path);
+
+        FILE *fp = fopen(rom_path, "rb");
+
         if (fp == NULL) {
             LOG_WARN("cge: extended char rom not found\n");
             return;