[dpdk-dev] [PATCH v2 1/1] cmdline: add any multi string mode to token string

[Piotr Azarewicz]

While parsing token string there may be several modes:
- fixed single string
- multi-choice single string
- any single string

This patch add one more mode - any multi string.

Signed-off-by: Piotr Azarewicz <piotrx.t.azarewicz at intel.com>
---

v2 changes:
- add cmdline_multi_string_t type for the new mode

 app/test/test_cmdline_string.c            |   15 ++++++----
 lib/librte_cmdline/cmdline_parse.c        |    8 ++++++
 lib/librte_cmdline/cmdline_parse.h        |    3 ++
 lib/librte_cmdline/cmdline_parse_string.c |   43 +++++++++++++++++++++--------
 lib/librte_cmdline/cmdline_parse_string.h |    7 +++++
 5 files changed, 60 insertions(+), 16 deletions(-)

diff --git a/app/test/test_cmdline_string.c b/app/test/test_cmdline_string.c
index 915a7d7..c5bb9c0 100644
--- a/app/test/test_cmdline_string.c
+++ b/app/test/test_cmdline_string.c
@@ -35,6 +35,7 @@
 #include <string.h>
 #include <inttypes.h>
 
+#include <rte_common.h>
 #include <rte_string_fns.h>
 
 #include <cmdline_parse.h>
@@ -65,9 +66,10 @@ struct string_elt_str string_elt_strs[] = {
 		{"one#two\nwith\nnewlines#three", "two\nwith\nnewlines", 1},
 };
 
-#if CMDLINE_TEST_BUFSIZE < STR_TOKEN_SIZE
+#if (CMDLINE_TEST_BUFSIZE < STR_TOKEN_SIZE) \
+|| (CMDLINE_TEST_BUFSIZE < STR_MULTI_TOKEN_SIZE)
 #undef CMDLINE_TEST_BUFSIZE
-#define CMDLINE_TEST_BUFSIZE STR_TOKEN_SIZE
+#define CMDLINE_TEST_BUFSIZE RTE_MAX(STR_TOKEN_SIZE, STR_MULTI_TOKEN_SIZE)
 #endif
 
 struct string_nb_str {
@@ -97,6 +99,11 @@ struct string_parse_str string_parse_strs[] = {
 		{"two with\rgarbage\tcharacters\n",
 				"one#two with\rgarbage\tcharacters\n#three",
 				"two with\rgarbage\tcharacters\n"},
+		{"one two", "one", "one"}, /* fixed string */
+		{"one two", TOKEN_STRING_MULTI, "one two"}, /* multi string */
+		{"one two", NULL, "one"}, /* any string */
+		{"one two #three", TOKEN_STRING_MULTI, "one two "},
+		/* multi string with comment */
 };
 
 
@@ -124,7 +131,6 @@ struct string_invalid_str string_invalid_strs[] = {
 		 "toolong!!!toolong!!!toolong!!!toolong!!!toolong!!!toolong!!!"
 		 "toolong!!!toolong!!!toolong!!!toolong!!!toolong!!!toolong!!!"
 		 "toolong!!!" },
-		 {"invalid", ""},
 		 {"", "invalid"}
 };
 
@@ -350,8 +356,7 @@ test_parse_string_valid(void)
 					string_parse_strs[i].str, help_str);
 			return -1;
 		}
-		if (strncmp(buf, string_parse_strs[i].result,
-				sizeof(string_parse_strs[i].result) - 1) != 0) {
+		if (strcmp(buf, string_parse_strs[i].result) != 0) {
 			printf("Error: result mismatch!\n");
 			return -1;
 		}
diff --git a/lib/librte_cmdline/cmdline_parse.c b/lib/librte_cmdline/cmdline_parse.c
index 24a6ed6..b496067 100644
--- a/lib/librte_cmdline/cmdline_parse.c
+++ b/lib/librte_cmdline/cmdline_parse.c
@@ -118,6 +118,14 @@ cmdline_isendoftoken(char c)
 	return 0;
 }
 
+int
+cmdline_isendofcommand(char c)
+{
+	if (!c || iscomment(c) || isendofline(c))
+		return 1;
+	return 0;
+}
+
 static unsigned int
 nb_common_chars(const char * s1, const char * s2)
 {
diff --git a/lib/librte_cmdline/cmdline_parse.h b/lib/librte_cmdline/cmdline_parse.h
index 4b25c45..4ac05d6 100644
--- a/lib/librte_cmdline/cmdline_parse.h
+++ b/lib/librte_cmdline/cmdline_parse.h
@@ -184,6 +184,9 @@ int cmdline_complete(struct cmdline *cl, const char *buf, int *state,
  * isendofline(c)) */
 int cmdline_isendoftoken(char c);
 
+/* return true if(!c || iscomment(c) || isendofline(c)) */
+int cmdline_isendofcommand(char c);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_cmdline/cmdline_parse_string.c b/lib/librte_cmdline/cmdline_parse_string.c
index 45883b3..35917a7 100644
--- a/lib/librte_cmdline/cmdline_parse_string.c
+++ b/lib/librte_cmdline/cmdline_parse_string.c
@@ -76,9 +76,10 @@ struct cmdline_token_ops cmdline_token_string_ops = {
 	.get_help = cmdline_get_help_string,
 };
 
-#define MULTISTRING_HELP "Mul-choice STRING"
-#define ANYSTRING_HELP   "Any STRING"
-#define FIXEDSTRING_HELP "Fixed STRING"
+#define CHOICESTRING_HELP "Mul-choice STRING"
+#define ANYSTRING_HELP    "Any STRING"
+#define ANYSTRINGS_HELP   "Any STRINGS"
+#define FIXEDSTRING_HELP  "Fixed STRING"
 
 static unsigned int
 get_token_len(const char *s)
@@ -123,8 +124,8 @@ cmdline_parse_string(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
 
 	sd = &tk2->string_data;
 
-	/* fixed string */
-	if (sd->str) {
+	/* fixed string (known single token) */
+	if ((sd->str != NULL) && (strcmp(sd->str, TOKEN_STRING_MULTI) != 0)) {
 		str = sd->str;
 		do {
 			token_len = get_token_len(str);
@@ -148,7 +149,21 @@ cmdline_parse_string(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
 		if (!str)
 			return -1;
 	}
-	/* unspecified string */
+	/* multi string */
+	else if (sd->str != NULL) {
+		if (ressize < STR_MULTI_TOKEN_SIZE)
+			return -1;
+
+		token_len = 0;
+		while (!cmdline_isendofcommand(buf[token_len]) &&
+		      token_len < (STR_MULTI_TOKEN_SIZE - 1))
+			token_len++;
+
+		/* return if token too long */
+		if (token_len >= (STR_MULTI_TOKEN_SIZE - 1))
+			return -1;
+	}
+	/* unspecified string (unknown single token) */
 	else {
 		token_len = 0;
 		while(!cmdline_isendoftoken(buf[token_len]) &&
@@ -162,12 +177,16 @@ cmdline_parse_string(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
 	}
 
 	if (res) {
-		/* we are sure that token_len is < STR_TOKEN_SIZE-1 */
-		snprintf(res, STR_TOKEN_SIZE, "%s", buf);
+		if ((sd->str != NULL) && (strcmp(sd->str, TOKEN_STRING_MULTI) == 0))
+			/* we are sure that token_len is < STR_MULTI_TOKEN_SIZE-1 */
+			snprintf(res, STR_MULTI_TOKEN_SIZE, "%s", buf);
+		else
+			/* we are sure that token_len is < STR_TOKEN_SIZE-1 */
+			snprintf(res, STR_TOKEN_SIZE, "%s", buf);
+
 		*((char *)res + token_len) = 0;
 	}
 
-
 	return token_len;
 }
 
@@ -242,8 +261,10 @@ int cmdline_get_help_string(cmdline_parse_token_hdr_t *tk, char *dstbuf,
 	s = sd->str;
 
 	if (s) {
-		if (get_next_token(s))
-			snprintf(dstbuf, size, MULTISTRING_HELP);
+		if (strcmp(s, TOKEN_STRING_MULTI) == 0)
+			snprintf(dstbuf, size, ANYSTRINGS_HELP);
+		else if (get_next_token(s))
+			snprintf(dstbuf, size, CHOICESTRING_HELP);
 		else
 			snprintf(dstbuf, size, FIXEDSTRING_HELP);
 	} else
diff --git a/lib/librte_cmdline/cmdline_parse_string.h b/lib/librte_cmdline/cmdline_parse_string.h
index 94aa1f1..3ceac57 100644
--- a/lib/librte_cmdline/cmdline_parse_string.h
+++ b/lib/librte_cmdline/cmdline_parse_string.h
@@ -70,8 +70,13 @@ extern "C" {
 /* size of a parsed string */
 #define STR_TOKEN_SIZE 128
 
+/* size of a parsed multi string */
+#define STR_MULTI_TOKEN_SIZE 4096
+
 typedef char cmdline_fixed_string_t[STR_TOKEN_SIZE];
 
+typedef char cmdline_multi_string_t[STR_MULTI_TOKEN_SIZE];
+
 struct cmdline_token_string_data {
 	const char *str;
 };
@@ -92,6 +97,8 @@ int cmdline_complete_get_elt_string(cmdline_parse_token_hdr_t *tk, int idx,
 int cmdline_get_help_string(cmdline_parse_token_hdr_t *tk, char *dstbuf,
 			    unsigned int size);
 
+#define TOKEN_STRING_MULTI ""
+
 #define TOKEN_STRING_INITIALIZER(structure, field, string)  \
 {                                                           \
 	/* hdr */                                               \
-- 
1.7.9.5