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Bring back P_FindSpecialLineFromTag() for backwards compatibility reasons; emulate the old taglist behavior for this function.

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This commit is contained in:
Nev3r 2020-07-29 17:26:43 +02:00
parent 729c8b2ec6
commit c914ac99b4
3 changed files with 57 additions and 1 deletions
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13
src/lua_baselib.c
View file

@ -32,6 +32,7 @@
#include "lua_script.h"
#include "lua_libs.h"
#include "lua_hud.h" // hud_running errors
#include "taglist.h" // P_FindSpecialLineFromTag
#define NOHUD if (hud_running)\
return luaL_error(L, "HUD rendering code should not call this function!");
@ -2094,6 +2095,17 @@ static int lib_pFindHighestCeilingSurrounding(lua_State *L)
return 1;
}
static int lib_pFindSpecialLineFromTag(lua_State *L)
{
INT16 special = (INT16)luaL_checkinteger(L, 1);
INT16 line = (INT16)luaL_checkinteger(L, 2);
INT32 start = (INT32)luaL_optinteger(L, 3, -1);
NOHUD
INLEVEL
lua_pushinteger(L, P_FindSpecialLineFromTag(special, line, start));
return 1;
}
static int lib_pSwitchWeather(lua_State *L)
{
INT32 weathernum = (INT32)luaL_checkinteger(L, 1);
@ -3581,6 +3593,7 @@ static luaL_Reg lib[] = {
{"P_FindNextLowestFloor",lib_pFindNextLowestFloor},
{"P_FindLowestCeilingSurrounding",lib_pFindLowestCeilingSurrounding},
{"P_FindHighestCeilingSurrounding",lib_pFindHighestCeilingSurrounding},
{"P_FindSpecialLineFromTag",lib_pFindSpecialLineFromTag},
{"P_SwitchWeather",lib_pSwitchWeather},
{"P_LinedefExecute",lib_pLinedefExecute},
{"P_SpawnLightningFlash",lib_pSpawnLightningFlash},

42
src/taglist.c
View file

@ -284,6 +284,48 @@ INT32 Tag_FindLineSpecial(const INT16 special, const mtag_t tag)
return -1;
}
/// Backwards compatibility iteration function for Lua scripts.
INT32 P_FindSpecialLineFromTag(INT16 special, INT16 tag, INT32 start)
{
if (tag == -1)
{
start++;
if (start >= (INT32)numlines)
return -1;
while (start < (INT32)numlines && lines[start].special != special)
start++;
return start;
}
else
{
size_t p = 0;
INT32 id;
// For backwards compatibility's sake, simulate the old linked taglist behavior:
// Iterate through the taglist and find the "start" line's position in the list,
// And start checking with the next one (if it exists).
if (start != -1)
{
for (; (id = Tag_Iterate_Lines(tag, p)) >= 0; p++)
if (id == start)
{
p++;
break;
}
}
for (; (id = Tag_Iterate_Lines(tag, p)) >= 0; p++)
if (lines[id].special == special)
return id;
return -1;
}
}
// Ingame list manipulation.
void Tag_SectorFSet (const size_t id, const mtag_t tag)

3
src/taglist.h
View file

@ -44,7 +44,8 @@ INT32 Tag_Iterate_Sectors (const mtag_t tag, const size_t p);
INT32 Tag_Iterate_Lines (const mtag_t tag, const size_t p);
INT32 Tag_Iterate_Things (const mtag_t tag, const size_t p);
INT32 Tag_FindLineSpecial(const INT16 special, const INT16 tag);
INT32 Tag_FindLineSpecial(const INT16 special, const mtag_t tag);
INT32 P_FindSpecialLineFromTag(INT16 special, INT16 tag, INT32 start);
#define TAG_ITER_C size_t kkkk;
#define TAG_ITER(fn, tag, id) for(kkkk = 0; (id = fn(tag, kkkk)) >= 0; kkkk++)