[PATCH] Add helper function to convert enums to string

[msuraev]

From: Max <msur...@sysmocom.de>

Add convertors for gsm48_chan_mode and gsm_chan_t types which are useful
for debugging.
---
 include/osmocom/gsm/gsm_utils.h          |  2 ++
 include/osmocom/gsm/protocol/gsm_04_08.h |  2 ++
 src/gsm/gsm48.c                          | 17 +++++++++++++++++
 src/gsm/gsm_utils.c                      | 17 +++++++++++++++++
 4 files changed, 38 insertions(+)

diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h
index 6458447..c9c565e 100644
--- a/include/osmocom/gsm/gsm_utils.h
+++ b/include/osmocom/gsm/gsm_utils.h
@@ -199,6 +199,8 @@ enum gsm_chan_t {
        _GSM_LCHAN_MAX
 };

+const char * osmo_gsm48_chan_type2str(enum gsm_chan_t type);
+
 /* Deprectated functions */
 /* Limit encoding and decoding to use no more than this amount of buffer bytes 
*/
 #define GSM_7BIT_LEGACY_MAX_BUFFER_SIZE  0x10000
diff --git a/include/osmocom/gsm/protocol/gsm_04_08.h 
b/include/osmocom/gsm/protocol/gsm_04_08.h
index d49b77f..78aaef2 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08.h
@@ -347,6 +347,8 @@ enum gsm48_chan_mode {
        GSM48_CMODE_DATA_3k6    = 0x13,
 };

+const char * osmo_gsm48_chan_mode2str(enum gsm48_chan_mode);
+
 /* Chapter 9.1.2 */
 struct gsm48_ass_cmd {
        /* Semantic is from 10.5.2.5a */
diff --git a/src/gsm/gsm48.c b/src/gsm/gsm48.c
index d0a2286..494c013 100644
--- a/src/gsm/gsm48.c
+++ b/src/gsm/gsm48.c
@@ -197,6 +197,23 @@ static const char *cc_state_names[32] = {
        "illegal state 31",
 };

+static const struct value_string gsm48_chan_modes[] = {
+       {GSM48_CMODE_SIGN,              "SIGNALLING"},
+       {GSM48_CMODE_SPEECH_V1,         "SPEECH_V1"},
+       {GSM48_CMODE_SPEECH_EFR,        "SPEECH_EFR"},
+       {GSM48_CMODE_SPEECH_AMR,        "SPEECH_AMR"},
+       {GSM48_CMODE_DATA_14k5,         "DATA_14k5"},
+       {GSM48_CMODE_DATA_12k0,         "DATA_12k0"},
+       {GSM48_CMODE_DATA_6k0,          "DATA_6k0"},
+       {GSM48_CMODE_DATA_3k6,          "DATA_3k6"},
+       { 0,                            NULL },
+};
+
+const char * osmo_gsm48_chan_mode2str(enum gsm48_chan_mode mode)
+{
+       return get_value_string(gsm48_chan_modes, mode);
+}
+
 const char *gsm48_cc_state_name(uint8_t state)
 {
        if (state < ARRAY_SIZE(cc_state_names))
diff --git a/src/gsm/gsm_utils.c b/src/gsm/gsm_utils.c
index e8e452f..16a4117 100644
--- a/src/gsm/gsm_utils.c
+++ b/src/gsm/gsm_utils.c
@@ -691,6 +691,23 @@ uint32_t gprs_tmsi2tlli(uint32_t p_tmsi, enum 
gprs_tlli_type type)
        return tlli;
 }

+static const struct value_string gsm48_chan_types[] = {
+       { GSM_LCHAN_NONE,       "NONE"},
+       { GSM_LCHAN_SDCCH,      "SDCCH"},
+       { GSM_LCHAN_TCH_F,      "TCH_F"},
+       { GSM_LCHAN_TCH_H,      "TCH_H"},
+       { GSM_LCHAN_UNKNOWN,    "UNKNOWN"},
+       { GSM_LCHAN_CCCH,       "CCCH"},
+       { GSM_LCHAN_PDTCH,      "PDTCH"},
+       { GSM_LCHAN_CBCH,       "CBCH"},
+       { 0,                    NULL },
+};
+
+const char * osmo_gsm48_chan_type2str(enum gsm_chan_t type)
+{
+       return get_value_string(gsm48_chan_types, type);
+}
+
 /* Wrappers for deprecated functions: */

 int gsm_7bit_decode(char *text, const uint8_t *user_data, uint8_t septet_l)
-- 
2.7.4