Add utility to lookup files in EF db

2 files changed, 23 insertions, 1 deletions

diff --git a/src/simutil.c b/src/simutil.c
index db4ee412..9cdf8247 100644
--- a/src/simutil.c
+++ b/src/simutil.c
@@ -24,6 +24,7 @@
 #endif
 
 #include <string.h>
+#include <stdlib.h>
 
 #include <glib.h>
 
@@ -62,7 +63,7 @@ struct opl_operator {
 #define ADM	4
 #define NEV	15
 
-static struct sim_ef_info efs[] = {
+static struct sim_ef_info ef_db[] = {
 {	0x2F05, ROOTMF, BINARY, 0,	ALW,	PIN	},
 {	0x2F06, ROOTMF, RECORD, 0,	ALW,	PIN	},
 {	0x2FE2, ROOTMF, BINARY, 10,	ALW,	NEV 	},
@@ -553,3 +554,22 @@ void sim_adn_build(unsigned char *data, int length,
 	/* Ext1 unused */
 	*data++ = 0xff;
 }
+
+static int find_ef_by_id(const void *key, const void *value)
+{
+	unsigned short id = GPOINTER_TO_UINT(key);
+	const struct sim_ef_info *info = value;
+
+	return id - info->id;
+}
+
+struct sim_ef_info *sim_ef_db_lookup(unsigned short id)
+{
+	struct sim_ef_info *result;
+	unsigned int nelem = sizeof(ef_db) / sizeof(struct sim_ef_info);
+
+	result = bsearch(GUINT_TO_POINTER(id), ef_db, nelem,
+				sizeof(struct sim_ef_info), find_ef_by_id);
+
+	return result;
+}
diff --git a/src/simutil.h b/src/simutil.h
index 474e16fd..4f2d3210 100644
--- a/src/simutil.h
+++ b/src/simutil.h
@@ -104,3 +104,5 @@ gboolean sim_adn_parse(const unsigned char *data, int length,
 void sim_adn_build(unsigned char *data, int length,
 			const struct ofono_phone_number *ph,
 			const char *identifier);
+
+struct sim_ef_info *sim_ef_db_lookup(unsigned short efid);