[PATCH 1/2] Teach Git how to parse standard power of 2 suffixes.

["Shawn O. Pearce" <spearce@spearce.org>]

Sometimes its necessary to supply a value as a power of two in a
configuration parameter.  In this case the user may want to use the
standard suffixes such as K, M, or G to indicate that the numerical
value should be multiplied by a constant base before being used.

Shell scripts/etc. can also benefit from this automatic option
parsing with `git repo-config --int`.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---

 This is a resend of the prior version of this patch.  Junio
 convinced me on #git that this version might be better.  :-)

 Meant for the top of sp/mmap, but may be useful elsewhere.

 Documentation/git-repo-config.txt |    5 ++++-
 config.c                          |    8 ++++++++
 2 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/Documentation/git-repo-config.txt b/Documentation/git-repo-config.txt
index b379ec5..c55a8ba 100644
--- a/Documentation/git-repo-config.txt
+++ b/Documentation/git-repo-config.txt
@@ -87,7 +87,10 @@ OPTIONS
 	git-repo-config will ensure that the output is "true" or "false"
 
 --int::
-	git-repo-config will ensure that the output is a simple decimal number
+	git-repo-config will ensure that the output is a simple
+	decimal number.  An optional value suffix of 'k', 'm', or 'g'
+	in the config file will cause the value to be multiplied
+	by 1024, 1048576, or 1073741824 prior to output.
 
 
 ENVIRONMENT
diff --git a/config.c b/config.c
index 2e0d5a8..83ce9e1 100644
--- a/config.c
+++ b/config.c
@@ -236,8 +236,16 @@ int git_config_int(const char *name, const char *value)
 	if (value && *value) {
 		char *end;
 		int val = strtol(value, &end, 0);
+		while (isspace(*end))
+			end++;
 		if (!*end)
 			return val;
+		if (!strcasecmp(end, "k"))
+			return val * 1024;
+		if (!strcasecmp(end, "m"))
+			return val * 1024 * 1024;
+		if (!strcasecmp(end, "g"))
+			return val * 1024 * 1024 * 1024;
 	}
 	die("bad config value for '%s' in %s", name, config_file_name);
 }
-- 
1.5.0.rc0.g6bb1