Refactor crossystem to move x86-specific implementation to its own file.

host/lib/host_misc.c

Index: host/lib/host_misc.c
diff --git a/host/lib/host_misc.c b/host/lib/host_misc.c
index 91eaea25d56ccaddd9ec7736f308f3215f44ceb3..f8dd9b8f451336235f9ff82dbf3bb7e571fa89be 100644
--- a/host/lib/host_misc.c
+++ b/host/lib/host_misc.c
@@ -9,6 +9,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #include "host_common.h"
@@ -18,6 +19,13 @@
 #include "vboot_common.h"
 
 
+char* StrCopy(char* dest, const char* src, int dest_size) {
+  strncpy(dest, src, dest_size);
+  dest[dest_size - 1] = '\0';
+  return dest;
+}
+
+
 uint8_t* ReadFile(const char* filename, uint64_t* size) {
   FILE* f;
   uint8_t* buf;
@@ -50,6 +58,45 @@ uint8_t* ReadFile(const char* filename, uint64_t* size) {
 }
 
 
+char* ReadFileString(char* dest, int size, const char* filename) {
+  char* got;
+  FILE* f;
+
+  f = fopen(filename, "rt");
+  if (!f)
+    return NULL;
+
+  got = fgets(dest, size, f);
+  fclose(f);
+  return got;
+}
+
+
+int ReadFileInt(const char* filename) {
+  char buf[64];
+  int value;
+  char* e = NULL;
+
+  if (!ReadFileString(buf, sizeof(buf), filename))
+    return -1;
+
+  /* Convert to integer.  Allow characters after the int ("123 blah"). */
+  value = strtol(buf, &e, 0);
+  if (e == buf)
+    return -1;  /* No characters consumed, so conversion failed */
+
+  return value;
+}
+
+
+int ReadFileBit(const char* filename, int bitmask) {
+  int value = ReadFileInt(filename);
+  if (value == -1)
+    return -1;
+  else return (value & bitmask ? 1 : 0);
+}
+
+
 int WriteFile(const char* filename, const void *data, uint64_t size) {
   FILE *f = fopen(filename, "wb");
   if (!f) {