toybox: lib/lib.c comparison

Little endian and big endian versions of peek (for host.c).

comparison

equal deleted inserted replaced

-:7402cae7889f
+:a0c328bc2c14
 ts.tv_sec = miliseconds/1000;
 ts.tv_nsec = (miliseconds%1000)*1000000;
 nanosleep(&ts, &ts);
 }
-int64_t peek(void *ptr, int size)
+// Inefficient, but deals with unaligned access
-{
+int64_t peek_le(void *ptr, unsigned size)
-if (size & 8) {
+{
-volatile int64_t *p = (int64_t *)ptr;
+int64_t ret = 0;
-return *p;
+char *c = ptr;
-} else if (size & 4) {
+int i;
-volatile int *p = (int *)ptr;
-return *p;
+for (i=0; i<size; i++) ret |= ((int64_t)c[i])<<i;
-} else if (size & 2) {
-volatile short *p = (short *)ptr;
+return ret;
-return *p;
+}
-} else {
-volatile char *p = (char *)ptr;
+int64_t peek_be(void *ptr, unsigned size)
-return *p;
+{
-}
+int64_t ret = 0;
+char *c = ptr;
+while (size--) ret = (ret<<8)|c[size];
+return ret;
+}
+int64_t peek(void *ptr, unsigned size)
+{
+return IS_BIG_ENDIAN ? peek_be(ptr, size) : peek_le(ptr, size);
 }
 void poke(void *ptr, uint64_t val, int size)
 {
 if (size & 8) {

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