added driver sim

driver/sw/utils.cpp

@@ -0,0 +1,71 @@
+
+
+#include <iostream>
+#include "utils.h"
+
+static uint32_t hti_old(char c) {
+      if (c >= 'A' && c <= 'F')
+          return c - 'A' + 10;
+      if (c >= 'a' && c <= 'f')
+          return c - 'a' + 10;
+      return c - '0';
+  }
+
+static uint32_t hToI_old(char *c, uint32_t size) {
+    uint32_t value = 0;
+    for (uint32_t i = 0; i < size; i++) {
+        value += hti_old(c[i]) << ((size - i - 1) * 4);
+    }
+    return value;
+}
+
+
+int parse_ihex_line(char* line, ihex_t* out) {
+    if (line[0] != ':') {
+      std::cout << "error: invalid line entry!" << std::endl;  
+      return -1;
+    }
+    
+    uint32_t data_size = 0;
+    uint32_t address = 0;    
+    uint32_t offset = 0;
+    bool has_offset = false;
+    bool is_eof = false;
+
+    auto record_type = hToI_old(line + 7, 2);
+
+    switch (record_type) {
+    case 0: { // data  
+      data_size = hToI_old(line + 1, 2);
+      address = hToI_old(line + 3, 4);
+      for (uint32_t i = 0; i < data_size; i++) {
+          out->data[i] = hToI_old(line + 9 + i * 2, 2); 
+      }
+    } break;
+    case 1: // end of file
+      is_eof = true;
+      break;
+    case 2: // extended segment address
+      offset = hToI_old(line + 9, 4) << 4;
+      has_offset = true;
+      break;
+    case 3: // start segment address
+      break;
+    case 4: // extended linear address
+      offset = hToI_old(line + 9, 4) << 16;
+      has_offset = true;
+      break;
+    case 5: // start linear address
+      break;
+    default:
+      return -1;
+    }
+
+    out->address = address;
+    out->data_size = data_size;
+    out->offset = offset;
+    out->has_offset = has_offset;
+    out->is_eof = is_eof;
+
+    return 0;
+  }