Implement read_track_sector().

include/dicformat/decls.h

@@ -2,7 +2,7 @@
 // The Disc Image Chef
 // ----------------------------------------------------------------------------
 //
-// Filename       : decsl.h
+// Filename       : decls.h
 // Author(s)      : Natalia Portillo <claunia@claunia.com>
 //
 // Component      : libdicformat.
@@ -111,4 +111,6 @@ void ecc_cd_reconstruct(void *context, uint8_t *sector, uint8_t type);
 
 uint32_t edc_cd_compute(void *context, uint32_t edc, const uint8_t *src, int size, int pos);
 
+int32_t read_track_sector(void *context, uint8_t *data, uint64_t sectorAddress, uint32_t *length, uint8_t track);
+
 #endif //LIBDICFORMAT_DECLS_H

include/dicformat/enums.h

@@ -1,4 +1,3 @@
-
 #pragma clang diagnostic push
 #pragma ide diagnostic ignored "OCUnusedGlobalDeclarationInspection"
 #ifndef LIBDICFORMAT_ENUMS_H
@@ -241,6 +240,27 @@ typedef enum
     DICF_STATUS_INVALID_CONTEXT = -1,
 } DicformatStatus;
 
+/**
+ *     Enumeration of media types defined in CICM metadata
+ */
+typedef enum
+{
+    /**
+     *     Purely optical discs
+     */
+            OpticalDisc = 0, /**
+                    * Media that is physically block-based or abstracted like that
+
+ */
+            BlockMedia  = 1, /**
+                *     Media that can be accessed by-byte or by-bit, like chips
+ */
+            LinearMedia = 2, /**
+                 *     Media that can only store data when it is modulated to audio
+ */
+            AudioMedia  = 3
+} XmlMediaType;
+
 #endif //LIBDICFORMAT_ENUMS_H
 
 #pragma clang diagnostic pop

include/dicformat/errors.h

@@ -16,6 +16,8 @@
 #define DICF_ERROR_NOT_ENOUGH_MEMORY -9
 #define DICF_ERROR_BUFFER_TOO_SMALL -10
 #define DICF_ERROR_MEDIA_TAG_NOT_PRESENT -11
+#define DICF_ERROR_INCORRECT_MEDIA_TYPE -12
+#define DICF_ERROR_TRACK_NOT_FOUND -13
 
 #define DICF_STATUS_OK 0
 #define DICF_STATUS_SECTOR_NEVER_WRITTEN 1

src/read.c

@@ -155,3 +155,32 @@ int32_t read_sector(void *context, uint64_t sectorAddress, uint8_t *data, uint32
     free(block);
     return DICF_STATUS_OK;
 }
+
+int32_t read_track_sector(void *context, uint8_t *data, uint64_t sectorAddress, uint32_t *length, uint8_t track)
+{
+    dicformatContext *ctx;
+    int              i;
+
+    if(context == NULL)
+        return DICF_ERROR_NOT_DICFORMAT;
+
+    ctx = context;
+
+    // TODO: Cast this field without casting the whole structure, as this can buffer overflow
+    // Not a libdicformat context
+    if(ctx->magic != DIC_MAGIC)
+        return DICF_ERROR_NOT_DICFORMAT;
+
+    if(ctx->imageInfo.XmlMediaType != OpticalDisc)
+        return DICF_ERROR_INCORRECT_MEDIA_TYPE;
+
+    for(i = 0; i < ctx->numberOfDataTracks; i++)
+    {
+        if(ctx->dataTracks[i].sequence == track)
+        {
+            return read_sector(context, ctx->dataTracks[i].start + sectorAddress, data, length);
+        }
+    }
+
+    return DICF_ERROR_TRACK_NOT_FOUND;
+}