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Fix new lines with TextMsg and SayText (side-effect of #763) (#778)

* Fix newlines for TextMsg

* Fix newlines for SayText

* Adjust comments

* Replace hardcoded detination value with HUD_* constants

* Make sure only official mods can use format string

* Fix typos

* Split condition for readability

* CS only: Fix newlines in TextMsg and with print_center
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Arkshine committed Oct 27, 2019
1 parent be3f2f5 commit 15a14a0a4327cf508336a9b0afe5cb2ac7ca88f9
Showing with 120 additions and 39 deletions.
  1. +72 −20 amxmodx/amxmodx.cpp
  2. +5 −0 amxmodx/amxmodx.h
  3. +15 −3 amxmodx/meta_api.cpp
  4. +28 −16 amxmodx/util.cpp
@@ -197,7 +197,7 @@ static cell AMX_NATIVE_CALL console_print(AMX *amx, cell *params) /* 2 param */

if (index < 1 || index > gpGlobals->maxClients) // Server console
{
if (len > 254)
if (len > 254) // Server console truncates after byte 255. (254 + \n = 255)
{
len = 254;
if ((message[len - 1] & 1 << 7))
@@ -216,18 +216,26 @@ static cell AMX_NATIVE_CALL console_print(AMX *amx, cell *params) /* 2 param */

if (pPlayer->ingame && !pPlayer->IsBot())
{
if (len > 126) // Client console truncates after byte 127. (126 + \n = 127)
if (len > 125) // Client console truncates after byte 127. (125 + \n\n = 127)
{
len = 126;
len = 125;
if ((message[len - 1] & 1 << 7))
{
len -= UTIL_CheckValidChar(message + len - 1); // Don't truncate a multi-byte character
}
}
message[len++] = '\n'; // Client expects newline from the server
message[len++] = '\n';

const auto canUseFormatString = g_official_mod && !g_bmod_dod; // Temporary exclusion for DoD until officially supported

if (canUseFormatString)
{
message[len++] = '\n'; // Double newline is required when pre-formatted string in TextMsg is passed as argument.
}

message[len] = 0;

UTIL_ClientPrint(pPlayer->pEdict, 2, message);
UTIL_ClientPrint(pPlayer->pEdict, HUD_PRINTCONSOLE, message);
}
}

@@ -241,6 +249,8 @@ static cell AMX_NATIVE_CALL client_print(AMX *amx, cell *params) /* 3 param */
int len = 0;
char *msg;

const auto canUseFormatString = g_official_mod && !g_bmod_dod; // Temporary exclusion for DoD until officially supported

if (params[1] == 0) // 0 = All players
{
for (int i = 1; i <= gpGlobals->maxClients; ++i)
@@ -252,16 +262,38 @@ static cell AMX_NATIVE_CALL client_print(AMX *amx, cell *params) /* 3 param */
g_langMngr.SetDefLang(i);
msg = format_amxstring(amx, params, 3, len);

// params[2]: print_notify = 1, print_console = 2, print_chat = 3, print_center = 4
if (((params[2] == 1) || (params[2] == 2)) && (len > 126)) // Client console truncates after byte 127. (126 + \n = 127)
// Client console truncates after byte 127.
// If format string is used, limit includes double new lines (125 + \n\n), otherwise one new line (126 + \n).
const auto bytesLimit = canUseFormatString ? 125 : 126;

if (g_bmod_cstrike && params[2] == HUD_PRINTCENTER) // Likely a temporary fix.
{
len = 126;
for (int j = 0; j < len; ++j)
{
if (msg[j] == '\n')
{
msg[j] = '\r';
}
}
}
else if (((params[2] == HUD_PRINTNOTIFY) || (params[2] == HUD_PRINTCONSOLE)) && (len > bytesLimit))
{
len = bytesLimit;
if ((msg[len - 1] & 1 << 7))
{
len -= UTIL_CheckValidChar(msg + len - 1); // Don't truncate a multi-byte character
}
}
msg[len++] = '\n'; // Client expects newline from the server
msg[len++] = '\n';

if (canUseFormatString)
{
if (!g_bmod_cstrike || params[2] == HUD_PRINTNOTIFY || params[2] == HUD_PRINTCONSOLE)
{
msg[len++] = '\n'; // Double newline is required when pre-formatted string in TextMsg is passed as argument.
}
}

msg[len] = 0;

UTIL_ClientPrint(pPlayer->pEdict, params[2], msg);
@@ -286,16 +318,38 @@ static cell AMX_NATIVE_CALL client_print(AMX *amx, cell *params) /* 3 param */

msg = format_amxstring(amx, params, 3, len);

// params[2]: print_notify = 1, print_console = 2, print_chat = 3, print_center = 4
if (((params[2] == 1) || (params[2] == 2)) && (len > 126)) // Client console truncates after byte 127. (126 + \n = 127)
// Client console truncates after byte 127.
// If format string is used, limit includes double new lines (125 + \n\n), otherwise one new line (126 + \n).
const auto bytesLimit = canUseFormatString ? 125 : 126;

if (g_bmod_cstrike && params[2] == HUD_PRINTCENTER) // Likely a temporary fix.
{
len = 126;
for (int j = 0; j < len; ++j)
{
if (msg[j] == '\n')
{
msg[j] = '\r';
}
}
}
else if (((params[2] == HUD_PRINTNOTIFY) || (params[2] == HUD_PRINTCONSOLE)) && (len > bytesLimit)) // Client console truncates after byte 127. (125 + \n\n = 127)
{
len = bytesLimit;
if ((msg[len - 1] & 1 << 7))
{
len -= UTIL_CheckValidChar(msg + len - 1); // Don't truncate a multi-byte character
}
}
msg[len++] = '\n'; // Client expects newline from the server
msg[len++] = '\n';

if (canUseFormatString)
{
if (!g_bmod_cstrike || params[2] == HUD_PRINTNOTIFY || params[2] == HUD_PRINTCONSOLE)
{
msg[len++] = '\n'; // Double newline is required when pre-formatted string in TextMsg is passed as argument.
}
}

msg[len] = 0;

UTIL_ClientPrint(pPlayer->pEdict, params[2], msg);
@@ -344,16 +398,15 @@ static cell AMX_NATIVE_CALL client_print_color(AMX *amx, cell *params) /* 3 para
*msg = 1;
}

if (len > 190) // Server crashes after byte 190. (190 + \n = 191)
if (len > 187) // Max available bytes: 188
{
len = 190;
len = 187;
if ((msg[len - 1] & 1 << 7))
{
len -= UTIL_CheckValidChar(msg + len - 1); // Don't truncate a multi-byte character
}
}

msg[len++] = '\n';

msg[len] = 0;

UTIL_ClientSayText(pPlayer->pEdict, sender ? sender : i, msg);
@@ -382,16 +435,15 @@ static cell AMX_NATIVE_CALL client_print_color(AMX *amx, cell *params) /* 3 para
*msg = 1;
}

if (len > 190) // Server crashes after byte 190. (190 + \n = 191)
if (len > 187) // Max available bytes: 188
{
len = 190;
len = 187;
if ((msg[len - 1] & 1 << 7))
{
len -= UTIL_CheckValidChar(msg + len - 1); // Don't truncate a multi-byte character
}
}

msg[len++] = '\n';
msg[len] = 0;

UTIL_ClientSayText(pPlayer->pEdict, sender ? sender : index, msg);
@@ -188,6 +188,11 @@ extern WeaponsVault g_weaponsData[MAX_WEAPONS];
extern XVars g_xvars;
extern bool g_bmod_cstrike;
extern bool g_bmod_dod;
extern bool g_bmod_dmc;
extern bool g_bmod_ricochet;
extern bool g_bmod_valve;
extern bool g_bmod_gearbox;
extern bool g_official_mod;
extern bool g_dontprecache;
extern int g_srvindex;
extern cvar_t* amxmodx_version;
@@ -88,6 +88,11 @@ XVars g_xvars;
bool g_bmod_tfc;
bool g_bmod_cstrike;
bool g_bmod_dod;
bool g_bmod_dmc;
bool g_bmod_ricochet;
bool g_bmod_valve;
bool g_bmod_gearbox;
bool g_official_mod;
bool g_dontprecache;
bool g_forcedmodules;
bool g_forcedsounds;
@@ -1800,6 +1805,7 @@ C_DLLEXPORT int GetEntityAPI2_Post(DLL_FUNCTIONS *pFunctionTable, int *interface
}

enginefuncs_t meta_engfuncs;

C_DLLEXPORT int GetEngineFunctions(enginefuncs_t *pengfuncsFromEngine, int *interfaceVersion)
{
memset(&meta_engfuncs, 0, sizeof(enginefuncs_t));
@@ -1809,11 +1815,17 @@ C_DLLEXPORT int GetEngineFunctions(enginefuncs_t *pengfuncsFromEngine, int *inte
meta_engfuncs.pfnSetModel = C_SetModel;
g_bmod_cstrike = true;
} else {
g_bmod_cstrike = false;
g_bmod_dod = !stricmp(g_mod_name.chars(), "dod");
g_bmod_tfc = !stricmp(g_mod_name.chars(), "tfc");
g_bmod_cstrike = false;
g_bmod_dod = !stricmp(g_mod_name.chars(), "dod");
g_bmod_dmc = !stricmp(g_mod_name.chars(), "dmc");
g_bmod_tfc = !stricmp(g_mod_name.chars(), "tfc");
g_bmod_ricochet = !stricmp(g_mod_name.chars(), "ricochet");
g_bmod_valve = !stricmp(g_mod_name.chars(), "valve");
g_bmod_gearbox = !stricmp(g_mod_name.chars(), "gearbox");
}

g_official_mod = g_bmod_cstrike || g_bmod_dod || g_bmod_dmc || g_bmod_ricochet || g_bmod_tfc || g_bmod_valve || g_bmod_gearbox;

meta_engfuncs.pfnCmd_Argc = C_Cmd_Argc;
meta_engfuncs.pfnCmd_Argv = C_Cmd_Argv;
meta_engfuncs.pfnCmd_Args = C_Cmd_Args;
@@ -260,42 +260,54 @@ void UTIL_DHudMessage(edict_t *pEntity, const hudtextparms_t &textparms, const c
MESSAGE_END();
}

/* warning - buffer of msg must be longer than 187 chars!
(here in AMX it is always longer) */
/**
* User message size limit: 192 bytes
* Actual available size: 188 bytes (with EOS)
*/
void UTIL_ClientPrint(edict_t *pEntity, int msg_dest, char *msg)
{
if (!gmsgTextMsg)
return; // :TODO: Maybe output a warning log?

char c = msg[187];
msg[187] = 0; // truncate without checking with strlen()
const auto canUseFormatString = g_official_mod && !g_bmod_dod; // Temporary exclusion for DoD until officially supported
const auto index = canUseFormatString ? 187 : 190;
char c = msg[index];
msg[index] = 0; // truncate without checking with strlen()

if (pEntity)
MESSAGE_BEGIN(MSG_ONE, gmsgTextMsg, NULL, pEntity);
else
MESSAGE_BEGIN(MSG_BROADCAST, gmsgTextMsg);

WRITE_BYTE(msg_dest);
WRITE_STRING("%s");
WRITE_STRING(msg);
MESSAGE_END();
msg[187] = c;
WRITE_BYTE(msg_dest); // 1 byte
if (canUseFormatString)
WRITE_STRING("%s"); // 3 bytes (2 + EOS)
WRITE_STRING(msg); // max 188 bytes (187 + EOS)
MESSAGE_END(); // max 192 bytes
msg[index] = c;
}

/**
* User message size limit: 192 bytes
* Actual available size: 188 bytes (with EOS)
*/
void UTIL_ClientSayText(edict_t *pEntity, int sender, char *msg)
{
if (!gmsgSayText)
return; // :TODO: Maybe output a warning log?

char c = msg[187];
msg[187] = 0; // truncate without checking with strlen()
const auto canUseFormatString = g_official_mod && !g_bmod_dod; // Temporary exclusion for DoD until officially supported
const auto index = canUseFormatString ? 187 : 190;
char c = msg[index];
msg[index] = 0; // truncate without checking with strlen()

MESSAGE_BEGIN(MSG_ONE, gmsgSayText, NULL, pEntity);
WRITE_BYTE(sender);
WRITE_STRING("%s");
WRITE_STRING(msg);
MESSAGE_END();
msg[187] = c;
WRITE_BYTE(sender); // 1 byte
if (canUseFormatString)
WRITE_STRING("%s"); // 3 bytes (2 + EOS)
WRITE_STRING(msg); // max 188 bytes (187 + EOS)
MESSAGE_END(); // max 192 bytes
msg[index] = c;
}

void UTIL_TeamInfo(edict_t *pEntity, int playerIndex, const char *pszTeamName)

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