[dpdk-dev] [PATCH] Add external parser support for unknown commands.
Keith Wiles
keith.wiles at windriver.com
Sun Nov 2 23:28:28 CET 2014
Allow for a external parser to handle the command line if the
command is not found and the developer has called the routine
int cmdline_set_external_parser(struct cmdline * cl,
cmdline_external_parser_t parser);
function to set the function pointer.
The function for the external parser function should return CMDLINE_PARSE_NOMATCH
if not able to match the command requested or zero is handled.
Prototype of external routine:
int (*cmdline_external_parser_t)(struct cmdline * cl, const char * buy);
Signed-off-by: Keith Wiles <keith.wiles at windriver.com>
---
lib/librte_cmdline/cmdline.h | 4 ++++
lib/librte_cmdline/cmdline_parse.c | 12 +++++++++++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/lib/librte_cmdline/cmdline.h b/lib/librte_cmdline/cmdline.h
index 4c28d37..f15d996 100644
--- a/lib/librte_cmdline/cmdline.h
+++ b/lib/librte_cmdline/cmdline.h
@@ -65,6 +65,8 @@
extern "C" {
#endif
+typedef int (*cmdline_external_parser_t)(struct cmdline * cl, const char * buf);
+
struct cmdline {
int s_in;
int s_out;
@@ -74,6 +76,7 @@ struct cmdline {
#ifdef RTE_EXEC_ENV_LINUXAPP
struct termios oldterm;
#endif
+ cmdline_external_parser_t external_parser;
};
struct cmdline *cmdline_new(cmdline_parse_ctx_t *ctx, const char *prompt, int s_in, int s_out);
@@ -85,6 +88,7 @@ int cmdline_in(struct cmdline *cl, const char *buf, int size);
int cmdline_write_char(struct rdline *rdl, char c);
void cmdline_interact(struct cmdline *cl);
void cmdline_quit(struct cmdline *cl);
+void cmdline_set_external_parser(struct cmdline * cl, cmdline_external_parser_t parser);
#ifdef __cplusplus
}
diff --git a/lib/librte_cmdline/cmdline_parse.c b/lib/librte_cmdline/cmdline_parse.c
index 940480d..a65ae70 100644
--- a/lib/librte_cmdline/cmdline_parse.c
+++ b/lib/librte_cmdline/cmdline_parse.c
@@ -212,6 +212,14 @@ match_inst(cmdline_parse_inst_t *inst, const char *buf,
return i;
}
+/* Set or disable external parser */
+void
+cmdline_set_external_parser(struct cmdline *cl, cmdline_external_parser_t parser)
+{
+ /* If parser is NULL it allows for disabling external parser */
+ if ( cl )
+ cl->external_parser = parser;
+}
int
cmdline_parse(struct cmdline *cl, const char * buf)
@@ -320,7 +328,9 @@ cmdline_parse(struct cmdline *cl, const char * buf)
/* no match */
else {
debug_printf("No match err=%d\n", err);
- return err;
+ if ( cl->external_parser == NULL )
+ return err;
+ return cl->external_parser(cl, buf);
}
return linelen;
--
2.1.0
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