[Rpm-maint] [rpm-software-management/rpm] RPM with Copy on Write (#1470)

[malmond77]

@malmond77 commented on this pull request.



> +#define NOT_FOUND 0
+
+#define BUFFER_SIZE (1024 * 128)
+
+/* magic value at end of file (64 bits) that indicates this is a transcoded rpm */
+#define MAGIC 3472329499408095051
+
+struct reflink_state_s {
+  /* Stuff that's used across rpms */
+  long fundamental_block_size;
+  char *buffer;
+
+  /* stuff that's used/updated per psm */
+  uint32_t keys, keysize;
+
+  // table for current rpm, keys * (keysize + sizeof(rpm_loff_t))

Also addressed in 91f7284e961cdbecdfec5beedbce03ee2f0fbd85

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