[PATCH 1/2] config api: Add git_config_magic_int()

[Andreas Ericsson <ae@op5.se>]

There are some values where git can reasonably guess at an
optimal value. For such occasions, this is a nifty addendum
to the config api, letting the caller specify a magic string
and a magic setting to return if the value of the variable
matches the magic string.

An example would be for threads, where 0 = auto is overly
voodoo-ish for some consumers, and typing "auto" is much
nicer and more immediately obvious.

Signed-off-by: Andreas Ericsson <ae@op5.se>
---

 cache.h  |    1 +
 config.c |    9 +++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/cache.h b/cache.h
index 3867ba7..1b923ad 100644
--- a/cache.h
+++ b/cache.h
@@ -623,6 +623,7 @@ extern int git_config(config_fn_t fn);
 extern int git_parse_long(const char *, long *);
 extern int git_parse_ulong(const char *, unsigned long *);
 extern int git_config_int(const char *, const char *);
+extern int git_config_magic_int(const char *, const char *, const char *, int);
 extern unsigned long git_config_ulong(const char *, const char *);
 extern int git_config_bool(const char *, const char *);
 extern int git_config_set(const char *, const char *);
diff --git a/config.c b/config.c
index 3e72778..635d92b 100644
--- a/config.c
+++ b/config.c
@@ -288,6 +288,15 @@ int git_config_int(const char *name, const char *value)
 	return ret;
 }
 
+int git_config_magic_int(const char *name, const char *value,
+			 const char *magic_value, int magic_setting)
+{
+	if (value && !strcasecmp(value, magic_value))
+		return magic_setting;
+
+	return git_config_int(name, value);
+}
+
 unsigned long git_config_ulong(const char *name, const char *value)
 {
 	unsigned long ret;
-- 
1.5.4.rc5.11.g0eab8