Split main.c into separate files and set up directory structure

src/devil1pld.c

@@ -0,0 +1,37 @@
+#include "devil1pld.h"
+#include "stdio.h"
+#include "stdlib.h"
+#include "string.h"
+
+void printpldh(struct PldHeader *ph) {
+    if (ph == NULL) {
+        return;
+    }
+    printf("number of offsets = %i\n", ph -> numOffset);
+    unsigned int i;
+    for (i = 0; i < ph -> numOffset; i++) {
+        printf("offset %i = %x\n", i, ph -> offsets[i]);
+    }
+}
+
+struct PldHeader *getpldh(const char *buffer) {
+    if (buffer == NULL) {
+        return NULL;
+    }
+    int32_t *n                = (int32_t*)buffer;
+    struct PldHeader *ph      = (struct PldHeader*)malloc(
+        sizeof(struct PldHeader)
+    );   
+    uint32_t size_offsets = sizeof(uint32_t) * n[0];
+    ph -> offsets         = (uint32_t*)malloc(size_offsets);
+    if (ph -> offsets == NULL) {
+        perror("Error 4: ");
+        free(ph);
+        free(ph -> offsets);
+        return NULL;
+    }
+    // set data of struct.
+    ph -> numOffset = n[0];
+    memcpy(ph -> offsets, buffer + sizeof(int32_t), size_offsets);
+    return ph;
+}