Signed-off-by: Kristian Høgsberg <krh@xxxxxxxxxx>
---
Makefile | 2 +-
parse-options.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
parse-options.h | 29 +++++++++++++++++++++
3 files changed, 104 insertions(+), 1 deletions(-)
create mode 100644 parse-options.c
create mode 100644 parse-options.h
diff --git a/Makefile b/Makefile
index 62bdac6..d90e959 100644
--- a/Makefile
+++ b/Makefile
@@ -310,7 +310,7 @@ LIB_OBJS = \
alloc.o merge-file.o path-list.o help.o unpack-trees.o $(DIFF_OBJS) \
color.o wt-status.o archive-zip.o archive-tar.o shallow.o utf8.o \
convert.o attr.o decorate.o progress.o mailmap.o symlinks.o remote.o \
- transport.o bundle.o
+ transport.o bundle.o parse-options.o
BUILTIN_OBJS = \
builtin-add.o \
diff --git a/parse-options.c b/parse-options.c
new file mode 100644
index 0000000..2fb30cd
--- /dev/null
+++ b/parse-options.c
@@ -0,0 +1,74 @@
+#include "git-compat-util.h"
+#include "parse-options.h"
+
+int parse_options(const char ***argv,
+ struct option *options, int count,
+ const char *usage_string)
+{
+ const char *value, *eq;
+ int i;
+
+ if (**argv == NULL)
+ return 0;
+ if ((**argv)[0] != '-')
+ return 0;
+ if (!strcmp(**argv, "--"))
+ return 0;
+
+ value = NULL;
+ for (i = 0; i < count; i++) {
+ if ((**argv)[1] == '-') {
+ if (!prefixcmp(options[i].long_name, **argv + 2)) {
+ if (options[i].type != OPTION_BOOLEAN)
+ value = *++(*argv);
+ goto match;
+ }
+
+ eq = strchr(**argv + 2, '=');
+ if (eq && options[i].type != OPTION_BOOLEAN &&
+ !strncmp(**argv + 2,
+ options[i].long_name, eq - **argv - 2)) {
+ value = eq + 1;
+ goto match;
+ }
+ }
+
+ if ((**argv)[1] == options[i].short_name) {
+ if ((**argv)[2] == '\0') {
+ if (options[i].type != OPTION_BOOLEAN)
+ value = *++(*argv);
+ goto match;
+ }
+
+ if (options[i].type != OPTION_BOOLEAN) {
+ value = **argv + 2;
+ goto match;
+ }
+ }
+ }
+
+ usage(usage_string);
+
+ match:
+ switch (options[i].type) {
+ case OPTION_BOOLEAN:
+ *(int *)options[i].value = 1;
+ break;
+ case OPTION_STRING:
+ if (value == NULL)
+ die("option %s requires a value.", (*argv)[-1]);
+ *(const char **)options[i].value = value;
+ break;
+ case OPTION_INTEGER:
+ if (value == NULL)
+ die("option %s requires a value.", (*argv)[-1]);
+ *(int *)options[i].value = atoi(value);
+ break;
+ default:
+ assert(0);
+ }
+
+ (*argv)++;
+
+ return 1;
+}
diff --git a/parse-options.h b/parse-options.h
new file mode 100644
index 0000000..39399c3
--- /dev/null
+++ b/parse-options.h
@@ -0,0 +1,29 @@
+#ifndef PARSE_OPTIONS_H
+#define PARSE_OPTIONS_H
+
+enum option_type {
+ OPTION_BOOLEAN,
+ OPTION_STRING,
+ OPTION_INTEGER,
+ OPTION_LAST,
+};
+
+struct option {
+ enum option_type type;
+ const char *long_name;
+ char short_name;
+ void *value;
+};
+
+/* Parse the given options against the list of known options. The
+ * order of the option structs matters, in that ambiguous
+ * abbreviations (eg, --in could be short for --include or
+ * --interactive) are matched by the first option that share the
+ * prefix.
+ */
+
+extern int parse_options(const char ***argv,
+ struct option *options, int count,
+ const char *usage_string);
+
+#endif
--
1.5.2.GIT
-
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