NCM services: Difference between revisions

Line 254:

| 13 || CloseMetaDatabase || Closes the meta database, and causes all future IPC commands to the current session to return error 0xDC05.

|-

| 14 || || Takes a type-6 byte buffer, and a type-5 buffer ~~with each entry being 16 bytes~~.

| 14 || [[#CheckNcaIDsPresent]] || Takes a type-6 byte buffer, and a type-5 buffer of [[#NcaID]]s.

|-

| 15 || SaveMetaDatabase || Flushes the in-memory database to savedata.

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This reads the titlelist stored in the specified title, normally a title with title-type 3, which is sysupdate-title 0100000000000816. Returns 0 with total_read_entries=0 when used with other title(s).

==== CheckNcaIDsPresent ====

Takes a type-6 byte buffer, and a type-5 buffer containing [[#NcaID]]s.

This function was stubbed to return 0xDC05 in [[2.0.0]].

On 1.0.0: Initialized the output buffer to all 1s. Then, for each [[#NcaID]] in the input buffer, it checks if that NcaID is present anywhere in the database, and if so writes 0 to the corresponding output byte.

In pseudocode, the function basically does the following:

for i in range(len(out_buf)):

out_buf[i] = 1

for i, NcaID in NcaIDs:

if is_present_in_database(NcaID):

out_buf[i] = 0

=== NcaID ===

@@ Line 254: / Line 254: @@
 | 13 || CloseMetaDatabase ||  Closes the meta database, and causes all future IPC commands to the current session to return error 0xDC05.
 |-
-| 14 || || Takes a type-6 byte buffer, and a type-5 buffer with each entry being 16 bytes.
+| 14 || [[#CheckNcaIDsPresent]] || Takes a type-6 byte buffer, and a type-5 buffer of [[#NcaID]]s.
 |-
 | 15 || SaveMetaDatabase || Flushes the in-memory database to savedata.
@@ Line 286: / Line 286: @@
 This reads the titlelist stored in the specified title, normally a title with title-type 3, which is sysupdate-title 0100000000000816. Returns 0 with total_read_entries=0 when used with other title(s).
+==== CheckNcaIDsPresent ====
+Takes a type-6 byte buffer, and a type-5 buffer containing [[#NcaID]]s.
+This function was stubbed to return 0xDC05 in [[2.0.0]].
+On 1.0.0: Initialized the output buffer to all 1s. Then, for each [[#NcaID]] in the input buffer, it checks if that NcaID is present anywhere in the database, and if so writes 0 to the corresponding output byte.
+In pseudocode, the function basically does the following:
+for i in range(len(out_buf)):
+    out_buf[i] = 1
+for i, NcaID in NcaIDs:
+    if is_present_in_database(NcaID):
+        out_buf[i] = 0
 === NcaID ===