54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
From b6cf15d8f38270d6d6c9df2c8589829c9a3ad176 Mon Sep 17 00:00:00 2001
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From: Pino Toscano <ptoscano@redhat.com>
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Date: Mon, 13 Jul 2015 17:32:33 +0200
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Subject: [PATCH 1/7] utils: import parse_size from libguestfs
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---
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src/utils.ml | 21 +++++++++++++++++++++
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src/utils.mli | 3 +++
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2 files changed, 24 insertions(+)
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diff --git a/src/utils.ml b/src/utils.ml
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index 3e81c21..7ae24bd 100644
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--- a/src/utils.ml
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+++ b/src/utils.ml
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@@ -204,3 +204,24 @@ let compare_architecture a1 a2 =
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exit 1
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in
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compare (index_of_architecture a1) (index_of_architecture a2)
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+
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+(* Parse a size field, eg. "10G". *)
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+let parse_size =
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+ let const_re = Str.regexp "^\\([.0-9]+\\)\\([bKMG]\\)$" in
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+ fun field ->
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+ let matches rex = Str.string_match rex field 0 in
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+ let sub i = Str.matched_group i field in
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+ let size_scaled f = function
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+ | "b" -> Int64.of_float f
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+ | "K" -> Int64.of_float (f *. 1024.)
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+ | "M" -> Int64.of_float (f *. 1024. *. 1024.)
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+ | "G" -> Int64.of_float (f *. 1024. *. 1024. *. 1024.)
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+ | _ -> assert false
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+ in
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+
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+ if matches const_re then (
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+ size_scaled (float_of_string (sub 1)) (sub 2)
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+ ) else (
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+ eprintf "supermin: cannot parse size field '%s'\n" field;
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+ exit 1
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+ )
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diff --git a/src/utils.mli b/src/utils.mli
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index 5de940d..7896e34 100644
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--- a/src/utils.mli
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+++ b/src/utils.mli
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@@ -90,3 +90,6 @@ val compare_version : string -> string -> int
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val compare_architecture : string -> string -> int
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(** Compare two architecture strings. *)
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+
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+val parse_size : string -> int64
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+(** Parse a size field, eg. [10G] *)
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--
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2.5.0
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