Print public chat messages

src/bss/teeworlds_state.asm

@@ -0,0 +1,4 @@
+; client struct array to store player information
+tw_clients resb TW_CLIENT_SIZE * MAX_CLIENTS
+
+

src/client_info.asm

@@ -0,0 +1,29 @@
+; TW_CLIENT_ID_OFFSET equ 0
+; TW_CLIENT_NAME_OFFSET equ TW_CLIENT_ID_OFFSET + 4
+; TW_CLIENT_CLAN_OFFSET equ TW_CLIENT_NAME_OFFSET + MAX_NAME_ARRAY_SIZE
+; TW_CLIENT_SIZE equ TW_CLIENT_CLAN_OFFSET + MAX_CLAN_ARRAY_SIZE
+
+set_client_info:
+    ; set_client_info [rax] [rdi]
+    ;  rax = client id
+    ; needs unpacker to be at team field of the SV_CLIENTINFO msg
+    ; https://chillerdragon.github.io/teeworlds-protocol/07/game_messages.html#NETMSGTYPE_SV_CLIENTINFO_team
+    push_registers
+
+    ; rsi is pointer into clients array
+    mov rbx, rax
+    imul rbx, TW_CLIENT_SIZE
+    lea rsi, [tw_clients + rbx]
+
+    ; pop team
+    call get_int
+
+    ; name
+    call get_string
+    mov rdi, rax
+    lea rax, [rsi+TW_CLIENT_NAME_OFFSET]
+    call str_copy
+
+    pop_registers
+    ret
+

src/data/teeworlds.asm

@@ -79,6 +79,19 @@ CHUNKFLAG_RESEND equ 0b1000_0000
 CHUNK_SYSTEM equ 0b0000_0001
 CHUNK_GAME equ 0b0000_0000
 
+UTF8_BYTE_LENGTH equ 4
+
+MAX_NAME_LENGTH equ 16
+MAX_NAME_ARRAY_SIZE equ MAX_NAME_LENGTH * UTF8_BYTE_LENGTH + 1
+
+MAX_CLAN_LENGTH equ 12
+MAX_CLAN_ARRAY_SIZE equ MAX_CLAN_LENGTH * UTF8_BYTE_LENGTH + 1
+
+MAX_SKIN_LENGTH equ 12
+MAX_SKIN_ARRAY_SIZE equ MAX_SKIN_LENGTH * UTF8_BYTE_LENGTH + 1
+
+MAX_CLIENTS equ 64
+
 GAME_NETVERSION db "0.7 802f1be60a05665f", 0
 CLIENT_VERSION equ 0x0705
 

src/data/teeworlds_state.asm

@@ -11,3 +11,9 @@ input_prev_weapon dd 0
 
 ack_game_tick dd -1
 
+local_client_id dd -1
+
+TW_CLIENT_ID_OFFSET equ 0
+TW_CLIENT_NAME_OFFSET equ TW_CLIENT_ID_OFFSET + 4
+TW_CLIENT_CLAN_OFFSET equ TW_CLIENT_NAME_OFFSET + MAX_NAME_ARRAY_SIZE
+TW_CLIENT_SIZE equ TW_CLIENT_CLAN_OFFSET + MAX_CLAN_ARRAY_SIZE

src/on_chat.asm

@@ -0,0 +1,38 @@
+on_chat:
+    ; on_chat [rax]
+    push_registers
+
+    ; mode
+    call get_int
+
+    ; client id
+    call get_int
+    mov r8, rax
+
+    ; target id
+    call get_int
+    mov r9, rax
+
+    ; message
+    call get_string
+    mov r10, rax
+
+    print_label s_chat
+
+    ; get author name
+    mov rbx, r8
+    imul rbx, TW_CLIENT_SIZE
+    lea rsi, [tw_clients + rbx + TW_CLIENT_NAME_OFFSET]
+    print_c_str rsi
+
+    call print_colon
+    call print_space
+
+    ; print message
+    print_c_str r10
+
+    call print_newline
+
+    pop_registers
+    ret
+

src/on_game.asm

@@ -106,8 +106,7 @@ on_game_msg_sv_broadcast:
 on_game_msg_sv_chat:
     ; on_game_msg_sv_chat [rax]
     ;  rax = message payload
-    print_label s_chat
-    call print_newline
+    call on_chat
     jmp on_game_message_end
 
 on_game_msg_sv_team:
@@ -186,6 +185,23 @@ on_game_msg_sv_serversettings:
 on_game_msg_sv_clientinfo:
     ; on_game_msg_sv_clientinfo [rax]
     ;  rax = message payload
+
+    ; client id
+    call get_int
+    mov rcx, rax
+
+    ; local
+    call get_int
+    cmp rax, 1
+    jne .skip_local
+    .local_client_info:
+    mov dword [local_client_id], ecx
+    .skip_local:
+
+    ; client id
+    mov rax, rcx
+    call set_client_info
+
     jmp on_game_message_end
 
 on_game_msg_sv_clientdrop:

src/teeworlds_asmr.asm

@@ -120,6 +120,7 @@ section .bss
     %include "src/bss/buffers.asm"
     %include "src/bss/huffman.asm"
     %include "src/bss/unpacker.asm"
+    %include "src/bss/teeworlds_state.asm"
 section .text
 
 %include "src/macros.asm"
@@ -151,6 +152,8 @@ section .text
 %include "src/on_snap.asm"
 %include "src/console/console.asm"
 %include "src/client.asm"
+%include "src/client_info.asm"
+%include "src/on_chat.asm"
 
 print_udp:
     print_label s_got_udp

tests/assert.asm

@@ -35,6 +35,7 @@ section .bss
     %include "src/bss/buffers.asm"
     %include "src/bss/huffman.asm"
     %include "src/bss/unpacker.asm"
+    %include "src/bss/teeworlds_state.asm"
 
     ; holds the path to the current source code file
     ; of the test as a null terminated C string
@@ -84,6 +85,8 @@ section .text
 %include "src/on_snap.asm"
 %include "src/console/console.asm"
 %include "src/client.asm"
+%include "src/client_info.asm"
+%include "src/on_chat.asm"
 
 %macro init_test 1
     ; init_test [__FILE__]