add way to call C functions

2 files changed, 74 insertions, 0 deletions

diff --git a/src/utils/dl.c b/src/utils/dl.c
new file mode 100644
index 0000000..1a1c430
--- /dev/null
+++ b/src/utils/dl.c
@@ -0,0 +1,66 @@
+#include "dl.h"
+#include "utils/memory.h"
+#include "utils/string.h"
+#include <dlfcn.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+void **dynamicLibraries;
+char **dynamicLibraries_str;
+size_t dynamicLibraries_length;
+size_t dynamicLibraries_capacity;
+
+void dynamicLibraryInit() {
+  dynamicLibraries = a404m_malloc(0);
+  dynamicLibraries_str = a404m_malloc(0);
+  dynamicLibraries_length = 0;
+  dynamicLibraries_capacity = 0;
+}
+
+void dynamicLibraryDestroy() {
+  for (size_t i = 0; i < dynamicLibraries_length; ++i) {
+    dlclose(dynamicLibraries[i]);
+    free(dynamicLibraries_str[i]);
+  }
+  free(dynamicLibraries);
+  free(dynamicLibraries_str);
+}
+
+void *dynamicLibraryOpen(char *file) {
+  for (size_t i = 0; i < dynamicLibraries_length; ++i) {
+    if (strEquals(file, dynamicLibraries_str[i])) {
+      return dynamicLibraries[i];
+    }
+  }
+
+  void *dl = dlopen(file, RTLD_LAZY);
+  if (dl == NULL) {
+    fputs(dlerror(), stderr);
+    return NULL;
+  }
+
+  if (dynamicLibraries_capacity == dynamicLibraries_length) {
+    dynamicLibraries_capacity += dynamicLibraries_capacity / 2 + 1;
+    dynamicLibraries_str =
+        a404m_realloc(dynamicLibraries_str, sizeof(*dynamicLibraries_str) *
+                                                dynamicLibraries_capacity);
+    dynamicLibraries =
+        a404m_realloc(dynamicLibraries,
+                      sizeof(*dynamicLibraries) * dynamicLibraries_capacity);
+  }
+  dynamicLibraries[dynamicLibraries_length] = dl;
+
+  const size_t file_length = strLength(file);
+  dynamicLibraries_str[dynamicLibraries_length] =
+      a404m_malloc(sizeof(**dynamicLibraries) * (file_length + 1));
+
+  for (size_t i = 0; i < file_length; ++i) {
+    dynamicLibraries_str[dynamicLibraries_length][i] = file[i];
+  }
+  dynamicLibraries_str[dynamicLibraries_length][file_length] = '\0';
+
+  dynamicLibraries_length += 1;
+
+  return dl;
+}
diff --git a/src/utils/dl.h b/src/utils/dl.h
new file mode 100644
index 0000000..74cb865
--- /dev/null
+++ b/src/utils/dl.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <stddef.h>
+
+void dynamicLibraryInit();
+void dynamicLibraryDestroy();
+
+void* dynamicLibraryOpen(char *file);