/
sctafpar.cpp
3419 lines (2923 loc) · 95.2 KB
/
sctafpar.cpp
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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "glk/adrift/scare.h"
#include "glk/adrift/scprotos.h"
#include "glk/jumps.h"
namespace Glk {
namespace Adrift {
/*
* Module notes:
*
* o Adds new "types" to jAsea's property descriptor: 'M' for multiline
* strings, 'Z', 'F'/'T', and 'E' for defaulted integers, booleans, and
* strings, 'i', 'b', and 's' for ignored integers, booleans, and strings,
* and '{...}' and '|...|' for "special" descriptions and version fixups
* that can't be described as things stand.
*
* o Adds new 'G' expression test, to check Global boolean.
*
* o The stack "adjustment" stuff is a bit of a bother.
*/
/* Assorted definitions and constants. */
static const sc_char NUL = '\0';
enum {
PARSE_TEMP_LENGTH = 256,
PARSE_MAX_DEPTH = 32
};
/* Multiline separator sequences for the various versions supported. */
enum { SEPARATOR_SIZE = 3 };
static const sc_byte V400_SEPARATOR[SEPARATOR_SIZE] = {0xbd, 0xd0, 0x00};
static const sc_byte V390_SEPARATOR[SEPARATOR_SIZE] = {0x2a, 0x2a, 0x00};
static const sc_byte V380_SEPARATOR[SEPARATOR_SIZE] = {0x2a, 0x2a, 0x00};
/*
* Tables of properties descriptors. These strings define the structure of
* a TAF file. Field keys are:
*
* $,#,B,M - string, integer, boolean, and multiline properties
* E,F,T,Z - string, integer, and boolean properties not in the TAF;
* set to "", FALSE, TRUE and zero on parsing (version < 4)
* i,s,b - string, integer, and boolean in the TAF, but not stored
* [num] - arrays of property, fixed size to num
* V - variable sized array of property, size in input file
* W - like V, but size - 1 in input file (version < 4)
* <class> - class of property, separate parse target (recurse)
* ?[!]expr: - conditional property based on expr
* G[!]expr: - conditional property based on expr using globals
* |...| - fixup specials for versions < 4
* {special} - because some things just defy description
*/
struct sc_parse_schema_t {
const sc_char *const class_name;
const sc_char *const descriptor;
};
/* Version 4.0 TAF file properties descriptor table. */
static const sc_parse_schema_t V400_PARSE_SCHEMA[] = {
{
"_GAME_",
"<HEADER>Header <GLOBAL>Globals V<ROOM>Rooms V<OBJECT>Objects V<TASK>Tasks"
" V<EVENT>Events V<NPC>NPCs V<ROOM_GROUP>RoomGroups V<SYNONYM>Synonyms"
" V<VARIABLE>Variables V<ALR>ALRs BCustomFont ?BCustomFont:$FontNameSize"
" $CompileDate"
},
{
"HEADER",
"MStartupText #StartRoom MWinText"
},
{
"GLOBAL",
"$GameName $GameAuthor $DontUnderstand #Perspective BShowExits #WaitTurns"
" BDispFirstRoom BBattleSystem #MaxScore $PlayerName BPromptName $PlayerDesc"
" #Task ?!#Task=0:$AltDesc #Position #ParentObject #PlayerGender"
" #MaxSize #MaxWt ?GBattleSystem:<BATTLE>Battle BEightPointCompass bNoDebug"
" BNoScoreNotify BNoMap bNoAutoComplete bNoControlPanel bNoMouse BSound"
" BGraphics <RESOURCE>IntroRes <RESOURCE>WinRes BStatusBox $StatusBoxText"
" iUnk1 iUnk2 BEmbedded"
},
{
"BATTLE",
"iStaminaLo iStaminaHi iStrengthLo iStrengthHi iAccuracyLo iAccuracyHi"
" iDefenseLo iDefenseHi iAgilityLo iAgilityHi iRecovery"
},
{
"ROOM",
"$Short $Long ?GEightPointCompass:[12]<ROOM_EXIT>Exits"
" ?!GEightPointCompass:[8]<ROOM_EXIT>Exits <RESOURCE>Res V<ROOM_ALT>Alts"
" ?!GNoMap:bHideOnMap"
},
{
"ROOM_EXIT",
"{V400_ROOM_EXIT:#Dest_#Var1_#Var2_#Var3}"
},
{
"ROOM_ALT",
"$M1 #Type <RESOURCE>Res1 $M2 #Var2 <RESOURCE>Res2 #HideObjects $Changed"
" #Var3 #DisplayRoom"
},
{
"RESOURCE",
"?GSound:$SoundFile,#SoundLen,ZSoundOffset"
" ?GGraphics:$GraphicFile,#GraphicLen,ZGraphicOffset {V400_RESOURCE}"
},
{
"OBJECT",
"$Prefix $Short V$Alias BStatic $Description #InitialPosition #Task"
" BTaskNotDone $AltDesc ?BStatic:<ROOM_LIST1>Where BContainer BSurface"
" #Capacity ?!BStatic:BWearable,#SizeWeight,#Parent"
" ?BStatic:{OBJECT:#Parent} #Openable ?#Openable=5:#Key ?#Openable=6:#Key"
" ?#Openable=7:#Key #SitLie ?!BStatic:BEdible BReadable ?BReadable:$ReadText"
" ?!BStatic:BWeapon #CurrentState ?!#CurrentState=0:$States,BStateListed"
" BListFlag <RESOURCE>Res1 <RESOURCE>Res2 ?GBattleSystem:<OBJ_BATTLE>Battle"
" $InRoomDesc #OnlyWhenNotMoved"
},
{
"OBJ_BATTLE",
"iProtectionValue iHitValue iMethod iAccuracy"
},
{
"ROOM_LIST1",
"#Type {ROOM_LIST1}"
},
{
"TASK",
"V$Command $CompleteText $ReverseMessage $RepeatText $AdditionalMessage"
" #ShowRoomDesc BRepeatable BReversible V$ReverseCommand <ROOM_LIST0>Where"
" $Question ?$Question:$Hint1,$Hint2 V<TASK_RESTR>Restrictions"
" V<TASK_ACTION>Actions $RestrMask <RESOURCE>Res"
},
{
"TASK_RESTR",
"#Type ?#Type=0:#Var1,#Var2,#Var3 ?#Type=1:#Var1,#Var2 ?#Type=2:#Var1,#Var2"
" ?#Type=3:#Var1,#Var2,#Var3 ?#Type=4:#Var1,#Var2,#Var3,$Var4 $FailMessage"
},
{
"TASK_ACTION",
"#Type ?#Type=0:#Var1,#Var2,#Var3 ?#Type=1:#Var1,#Var2,#Var3"
" ?#Type=2:#Var1,#Var2 ?#Type=3:#Var1,#Var2,#Var3,$Expr,#Var5"
" ?#Type=4:#Var1 ?#Type=5:#Var1,#Var2 ?#Type=6:#Var1,#Var2,#Var3"
" ?#Type=7:iVar1,iVar2,iVar3"
},
{
"ROOM_LIST0",
"#Type {ROOM_LIST0}"
},
{
"EVENT",
"$Short #StarterType ?#StarterType=2:#StartTime,#EndTime"
" ?#StarterType=3:#TaskNum #RestartType BTaskFinished #Time1 #Time2"
" $StartText $LookText $FinishText <ROOM_LIST0>Where #PauseTask"
" BPauserCompleted #PrefTime1 $PrefText1 #ResumeTask BResumerCompleted"
" #PrefTime2 $PrefText2 #Obj2 #Obj2Dest #Obj3 #Obj3Dest #Obj1 #Obj1Dest"
" #TaskAffected [5]<RESOURCE>Res"
},
{
"NPC",
"$Name $Prefix V$Alias $Descr #StartRoom $AltText #Task V<TOPIC>Topics"
" V<WALK>Walks BShowEnterExit ?BShowEnterExit:$EnterText,$ExitText"
" $InRoomText #Gender [4]<RESOURCE>Res ?GBattleSystem:<NPC_BATTLE>Battle"
},
{
"NPC_BATTLE",
"iAttitude iStaminaLo iStaminaHi iStrengthLo iStrengthHi iAccuracyLo"
" iAccuracyHi iDefenseLo iDefenseHi iAgilityLo iAgilityHi iSpeed"
" iKilledTask iRecovery iStaminaTask"
},
{
"TOPIC",
"$Subject $Reply #Task $AltReply"
},
{
"WALK",
"#NumStops BLoop #StartTask #CharTask #MeetObject #ObjectTask #StoppingTask"
" #MeetChar $ChangedDesc {WALK:#Rooms_#Times}"
},
{
"ROOM_GROUP",
"$Name {ROOM_GROUP:[]BList}"
},
{
"SYNONYM",
"$Replacement $Original"
},
{
"VARIABLE",
"$Name #Type $Value"
},
{
"ALR",
"$Original $Replacement"
},
{nullptr, nullptr}
};
/* Version 3.9 TAF file properties descriptor table. */
static const sc_parse_schema_t V390_PARSE_SCHEMA[] = {
{
"_GAME_",
"<HEADER>Header <GLOBAL>Globals V<ROOM>Rooms V<OBJECT>Objects V<TASK>Tasks"
" V<EVENT>Events V<NPC>NPCs V<ROOM_GROUP>RoomGroups V<SYNONYM>Synonyms"
" V<VARIABLE>Variables V<ALR>ALRs BCustomFont ?BCustomFont:$FontNameSize"
" $CompileDate sPassword"
},
{
"HEADER",
"MStartupText #StartRoom MWinText"
},
{
"GLOBAL",
"$GameName $GameAuthor $DontUnderstand #Perspective BShowExits #WaitTurns"
" BDispFirstRoom BBattleSystem #MaxScore $PlayerName BPromptName $PlayerDesc"
" #Task ?!#Task=0:$AltDesc #Position #ParentObject #PlayerGender"
" #MaxSize #MaxWt ?GBattleSystem:<BATTLE>Battle BEightPointCompass bNoDebug"
" BNoScoreNotify BNoMap bNoAutoComplete bNoControlPanel bNoMouse"
" BSound BGraphics <RESOURCE>IntroRes <RESOURCE>WinRes FStatusBox"
" EStatusBoxText iUnk1 iUnk2 FEmbedded"
},
{
"BATTLE",
"iStamina iStrength iDefense"
},
{
"ROOM",
"$Short $Long $LastDesc ?GEightPointCompass:[12]<ROOM_EXIT>Exits"
" ?!GEightPointCompass:[8]<ROOM_EXIT>Exits $AddDesc1 #Task1 $AddDesc2 #Task2"
" #Obj $AltDesc #TypeHideObjects <RESOURCE>Res <RESOURCE>LastRes"
" <RESOURCE>Task1Res <RESOURCE>Task2Res <RESOURCE>AltRes"
" ?!GNoMap:bHideOnMap |V390_ROOM:_Alts_|"
},
{
"ROOM_EXIT",
"{V390_V380_ROOM_EXIT:#Dest_#Var1_#Var2_ZVar3}"
},
{
"RESOURCE",
"?GSound:$SoundFile,ZSoundLen,ZSoundOffset"
" ?GGraphics:$GraphicFile,ZGraphicLen,ZGraphicOffset"
},
{
"OBJECT",
"$Prefix $Short"
" [1]$Alias BStatic $Description #InitialPosition #Task BTaskNotDone"
" $AltDesc ?BStatic:<ROOM_LIST1>Where BContainer BSurface #Capacity"
" ?!BStatic:BWearable,#SizeWeight,#Parent ?BStatic:{OBJECT:#Parent}"
" #Openable |V390_OBJECT:_Openable_,Key| #SitLie ?!BStatic:BEdible BReadable"
" ?BReadable:$ReadText ?!BStatic:BWeapon ZCurrentState FListFlag"
" <RESOURCE>Res1 <RESOURCE>Res2 ?GBattleSystem:<OBJ_BATTLE>Battle"
" EInRoomDesc ZOnlyWhenNotMoved"
},
{
"OBJ_BATTLE",
"iProtectionValue iHitValue iMethod"
},
{
"ROOM_LIST1",
"#Type {ROOM_LIST1}"
},
{
"TASK",
"W$Command $CompleteText $ReverseMessage $RepeatText $AdditionalMessage"
" #ShowRoomDesc BRepeatable BReversible W$ReverseCommand <ROOM_LIST0>Where"
" $Question ?$Question:$Hint1,$Hint2 V<TASK_RESTR>Restrictions"
" V<TASK_ACTION>Actions |V390_TASK:$RestrMask| <RESOURCE>Res"
},
{
"TASK_RESTR",
"#Type ?#Type=0:#Var1,#Var2,#Var3 ?#Type=1:#Var1,#Var2 ?#Type=2:#Var1,#Var2"
" ?#Type=3:#Var1,#Var2,#Var3 ?#Type=4:#Var1,#Var2,#Var3,EVar4"
",|V390_TASK_RESTR:Var1>0?#Var1++| $FailMessage"
},
{
"TASK_ACTION",
"#Type |V390_TASK_ACTION:Type>4?#Type++| ?#Type=0:#Var1,#Var2,#Var3"
" ?#Type=1:#Var1,#Var2,#Var3 ?#Type=2:#Var1,#Var2"
" ?#Type=3:#Var1,#Var2,#Var3,|V390_TASK_ACTION:$Expr_#Var5|"
" ?#Type=4:#Var1 ?#Type=6:#Var1,ZVar2,ZVar3 ?#Type=7:iVar1,iVar2,iVar3"
},
{
"ROOM_LIST0",
"#Type {ROOM_LIST0}"
},
{
"EVENT",
"$Short #StarterType ?#StarterType=2:#StartTime,#EndTime"
" ?#StarterType=3:#TaskNum #RestartType BTaskFinished #Time1 #Time2"
" $StartText $LookText $FinishText <ROOM_LIST0>Where #PauseTask"
" BPauserCompleted #PrefTime1 $PrefText1 #ResumeTask BResumerCompleted"
" #PrefTime2 $PrefText2 #Obj2 #Obj2Dest #Obj3 #Obj3Dest #Obj1 #Obj1Dest"
" #TaskAffected [5]<RESOURCE>Res"
},
{
"NPC",
"$Name $Prefix [1]$Alias $Descr #StartRoom $AltText #Task V<TOPIC>Topics"
" V<WALK>Walks BShowEnterExit ?BShowEnterExit:$EnterText,$ExitText"
" $InRoomText #Gender [4]<RESOURCE>Res ?GBattleSystem:<NPC_BATTLE>Battle"
},
{
"NPC_BATTLE",
"iAttitude iStamina iStrength iDefense iSpeed iKilledTask"
},
{
"TOPIC",
"$Subject $Reply #Task $AltReply"
},
{
"WALK",
"#NumStops BLoop #StartTask #CharTask #MeetObject #ObjectTask #StoppingTask"
" ZMeetChar $ChangedDesc {WALK:#Rooms_#Times}"
},
{
"ROOM_GROUP",
"$Name {ROOM_GROUP:[]BList}"
},
{
"SYNONYM",
"$Replacement $Original"
},
{
"VARIABLE",
"$Name ZType $Value"
},
{
"ALR",
"$Original $Replacement"
},
{nullptr, nullptr}
};
/* Version 3.8 TAF file properties descriptor table. */
static const sc_parse_schema_t V380_PARSE_SCHEMA[] = {
{
"_GAME_",
"<HEADER>Header <GLOBAL>Globals V<ROOM>Rooms V<OBJECT>Objects V<TASK>Tasks"
" V<EVENT>Events V<NPC>NPCs V<ROOM_GROUP>RoomGroups V<SYNONYM>Synonyms"
" FCustomFont $CompileDate sPassword |V380_GLOBAL:_MaxScore_|"
" |V380_OBJECT:_InitialPositions_|"
},
{
"HEADER",
"MStartupText #StartRoom MWinText"
},
{
"GLOBAL",
"$GameName $GameAuthor #MaxCarried |V380_MaxSize_MaxWt_| $DontUnderstand"
" #Perspective BShowExits #WaitTurns FDispFirstRoom FBattleSystem"
" EPlayerName FPromptName EPlayerDesc ZTask ZPosition ZParentObject"
" ZPlayerGender FEightPointCompass TNoScoreNotify FSound FGraphics"
" FStatusBox EStatusBoxText FEmbedded"
},
{
"ROOM",
"$Short $Long $LastDesc [8]<ROOM_EXIT>Exits $AddDesc1 #Task1 $AddDesc2"
" #Task2 #Obj $AltDesc #TypeHideObjects |V380_ROOM:_Alts_|"
},
{
"ROOM_EXIT",
"{V390_V380_ROOM_EXIT:#Dest_#Var1_#Var2_ZVar3}"
},
{
"OBJECT",
"$Prefix $Short [1]$Alias BStatic $Description #InitialPosition #Task"
" BTaskNotDone $AltDesc ?BStatic:<ROOM_LIST1>Where #SurfaceContainer"
" FSurface ?#SurfaceContainer=2:TSurface FContainer"
" ?#SurfaceContainer=1:TContainer #Capacity |V380_OBJECT:#Capacity*10+2|"
" ?!BStatic:BWearable,#SizeWeight,#Parent ?BStatic:{OBJECT:#Parent}"
" #Openable |V380_OBJECT:_Openable_,Key| #SitLie ?!BStatic:BEdible BReadable"
" ?BReadable:$ReadText ?!BStatic:BWeapon ZCurrentState FListFlag"
" EInRoomDesc ZOnlyWhenNotMoved"
},
{
"ROOM_LIST1",
"#Type {ROOM_LIST1}"
},
{
"TASK",
"W$Command $CompleteText $ReverseMessage $RepeatText $AdditionalMessage"
" #ShowRoomDesc BRepeatable #Score BSingleScore [6]<TASK_MOVE>Movements"
" BReversible W$ReverseCommand #WearObj1 #WearObj2 #HoldObj1 #HoldObj2"
" #HoldObj3 #Obj1 #Task BTaskNotDone $TaskMsg $HoldMsg $WearMsg $CompanyMsg"
" BNotInSameRoom #NPC $Obj1Msg #Obj1Room <ROOM_LIST0>Where BKillsPlayer"
" BHoldingSameRoom $Question ?$Question:$Hint1,$Hint2 #Obj2"
" ?!#Obj2=0:#Obj2Var1,#Obj2Var2,$Obj2Msg BWinGame |V380_TASK:_Actions_|"
" |V380_TASK:_Restrictions_|"
},
{
"TASK_MOVE",
"#Var1 #Var2 #Var3"
},
{
"ROOM_LIST0",
"#Type {ROOM_LIST0}"
},
{
"EVENT",
"$Short #StarterType ?#StarterType=2:#StartTime,#EndTime"
" ?#StarterType=3:#TaskNum #RestartType BTaskFinished #Time1 #Time2"
" $StartText $LookText $FinishText <ROOM_LIST0>Where #PauseTask"
" BPauserCompleted #PrefTime1 $PrefText1 #ResumeTask BResumerCompleted"
" #PrefTime2 $PrefText2 #Obj2 #Obj2Dest #Obj3 #Obj3Dest #Obj1 #Obj1Dest"
" #TaskAffected"
},
{
"NPC",
"$Name $Prefix [1]$Alias $Descr #StartRoom $AltText #Task V<TOPIC>Topics"
" V<WALK>Walks BShowEnterExit ?BShowEnterExit:$EnterText,$ExitText"
" $InRoomText ZGender"
},
{
"TOPIC",
"$Subject $Reply #Task $AltReply"
},
{
"WALK",
"#NumStops BLoop #StartTask #CharTask #MeetObject"
" ?!#MeetObject=0:|V380_WALK:_MeetObject_| #ObjectTask ZMeetChar"
" {WALK:#Rooms_#Times} ZStoppingTask EChangedDesc"
},
{
"ROOM_GROUP",
"$Name {ROOM_GROUP:[]BList}"
},
{
"SYNONYM",
"$Replacement $Original"
},
{nullptr, nullptr}
};
/*
* parse_select_schema()
*
* Select one of the parse schemata based on a TAF file.
*/
static const sc_parse_schema_t *parse_select_schema(sc_tafref_t taf) {
/* Switch based on the TAF file version. */
switch (taf_get_version(taf)) {
case TAF_VERSION_400:
return V400_PARSE_SCHEMA;
case TAF_VERSION_390:
return V390_PARSE_SCHEMA;
case TAF_VERSION_380:
return V380_PARSE_SCHEMA;
default:
sc_fatal("parse_select_schema: invalid TAF file version\n");
return nullptr;
}
}
/* The uncompressed TAF file from which we get all our data. */
static sc_tafref_t parse_taf = nullptr;
static sc_int parse_tafline = 0;
/* The parse schema selected for this TAF file. */
static sc_parse_schema_t const *parse_schema = nullptr;
/* Properties bundle and trace flag, set before parsing. */
static sc_prop_setref_t parse_bundle = nullptr;
static sc_bool parse_trace = FALSE;
/*
* Stack of property keys. The stack is filled by parsing, and written
* to the property store on parse terminals.
*/
static sc_vartype_t parse_vt_key[PARSE_MAX_DEPTH];
static sc_char parse_format[PARSE_MAX_DEPTH];
static sc_int parse_depth = 0;
/*
* parse_push_key()
* parse_pop_key()
*
* Push a key of the given type onto the property key stack, and pop a key
* off on unwind.
*/
static void parse_push_key(sc_vartype_t vt_key, sc_char type) {
if (parse_depth == PARSE_MAX_DEPTH)
sc_fatal("parse_push_key: stack overrun\n");
/* Push the key, and its associated type. */
memcpy(parse_vt_key + parse_depth, &vt_key, sizeof(vt_key));
parse_format[parse_depth] = type;
parse_depth++;
}
static void parse_pop_key(void) {
/* Check the stack has something to pop, then pop it. */
if (parse_depth == 0)
sc_fatal("parse_pop_key: stack underrun\n");
parse_depth--;
}
/*
* parse_retrieve_stack()
*
* This is ugly. The parse produces indexes before the things that they
* index. An expedient fix is to switch i-s keys before storing a property
* value
*/
static void parse_retrieve_stack(sc_char format[], sc_vartype_t vt_key[], sc_int *depth) {
sc_int index_;
/* Switch index-string key pairs. */
for (index_ = 0; index_ < parse_depth; index_++) {
if (index_ < parse_depth - 1
&& parse_format[index_] == PROP_KEY_INTEGER
&& parse_format[index_ + 1] == PROP_KEY_STRING) {
/* Swap format and key elements. */
format[index_] = parse_format[index_ + 1];
format[index_ + 1] = parse_format[index_];
vt_key[index_] = parse_vt_key[index_ + 1];
vt_key[index_ + 1] = parse_vt_key[index_];
index_++;
} else {
/* Simple copy of format and key elements. */
format[index_] = parse_format[index_];
vt_key[index_] = parse_vt_key[index_];
}
}
/* Return the parse depth. */
*depth = parse_depth;
}
/*
* parse_stack_backtrace()
*
* Dump the parse stack. Used for diagnostics on finding what we think may
* be a bad game.
*/
static void parse_stack_backtrace(void) {
sc_vartype_t vt_key[PARSE_MAX_DEPTH];
sc_char format[PARSE_MAX_DEPTH];
sc_int depth, index_;
parse_retrieve_stack(format, vt_key, &depth);
sc_error("parse_stack_backtrace: version %s schema parsed to depth %ld\n",
(parse_schema == V400_PARSE_SCHEMA) ? "4.00" :
(parse_schema == V390_PARSE_SCHEMA) ? "3.90" :
(parse_schema == V380_PARSE_SCHEMA) ? "3.80" : "[Invalid]",
depth);
sc_error("parse_stack_backtrace: parse stack backtrace follows...\n");
for (index_ = 0; index_ < depth; index_++) {
sc_char type;
type = format[index_];
if (type == PROP_KEY_INTEGER)
sc_error("%2ld - [%c] %ld\n", index_, type, vt_key[index_].integer);
else if (type == PROP_KEY_STRING)
sc_error("%2ld - [%c] \"%s\"\n", index_, type, vt_key[index_].string);
else
sc_error("%2ld - [%c] %p\n", index_, type, vt_key[index_].voidp);
}
}
/*
* parse_put_property()
* parse_get_property()
*
* Write or read a property based on the keys amassed so far.
*/
static void parse_put_property(sc_vartype_t vt_value, sc_char type) {
sc_vartype_t vt_key[PARSE_MAX_DEPTH];
sc_char format[PARSE_MAX_DEPTH + 4];
sc_int depth;
/* Retrieve the adjusted stack. */
parse_retrieve_stack(format + 3, vt_key, &depth);
/* Complete the format for the property put. */
format[0] = type;
format[1] = '-';
format[2] = '>';
format[depth + 3] = NUL;
/* Store the property under the stacked keys. */
assert(parse_bundle);
prop_put(parse_bundle, format, vt_value, vt_key);
}
static sc_bool parse_get_property(sc_vartype_t *vt_rvalue, sc_char type) {
sc_vartype_t vt_key[PARSE_MAX_DEPTH];
sc_char format[PARSE_MAX_DEPTH + 4];
sc_int depth;
sc_bool status;
/* Retrieve the adjusted stack. */
parse_retrieve_stack(format + 3, vt_key, &depth);
/* Complete the format for the property put. */
format[0] = type;
format[1] = '<';
format[2] = '-';
format[depth + 3] = NUL;
/* Retrieve the property using the stacked keys. */
assert(parse_bundle);
status = prop_get(parse_bundle, format, vt_rvalue, vt_key);
return status;
}
/*
* parse_get_child_count()
*
* Convenience form of parse_get_property(), retrieve an integer property
* indicating the child count of the effectively stacked node, or zero if
* no such node exists.
*/
static sc_int parse_get_child_count(void) {
sc_vartype_t vt_rvalue;
if (!parse_get_property(&vt_rvalue, PROP_INTEGER))
vt_rvalue.integer = 0;
return vt_rvalue.integer;
}
/*
* parse_get_integer_property()
* parse_get_boolean_property()
* parse_get_string_property()
*
* Convenience forms of parse_get_property(), retrieve directly, and report
* a fatal error if the property does not exist.
*/
static sc_int parse_get_integer_property(void) {
sc_vartype_t vt_rvalue;
if (!parse_get_property(&vt_rvalue, PROP_INTEGER))
sc_fatal("parse_get_integer_property: missing property\n");
return vt_rvalue.integer;
}
static sc_bool parse_get_boolean_property(void) {
sc_vartype_t vt_rvalue;
if (!parse_get_property(&vt_rvalue, PROP_BOOLEAN))
sc_fatal("parse_get_boolean_property: missing property\n");
return vt_rvalue.boolean;
}
static const sc_char *parse_get_string_property(void) {
sc_vartype_t vt_rvalue;
if (!parse_get_property(&vt_rvalue, PROP_STRING))
sc_fatal("parse_get_string_property: missing property\n");
return vt_rvalue.string;
}
/* Pushback line, and pushback requested flag. */
static const sc_char *parse_pushback_line = nullptr;
static sc_bool parse_use_pushback = FALSE;
/*
* parse_get_taf_string()
* parse_get_taf_integer()
* parse_get_taf_boolean()
* parse_taf_pushback()
*
* Wrapper round obtaining the next TAF file line, with variants to convert
* the line content into an integer or boolean, and a function for effective
* TAF line pushback.
*/
static const sc_char *parse_get_taf_string(CONTEXT) {
const sc_char *line;
/* If pushback requested, use that instead of reading. */
if (parse_use_pushback) {
/* Use the pushback line, and clear the request. */
assert(parse_pushback_line);
line = parse_pushback_line;
parse_use_pushback = FALSE;
} else {
/* Get the next line, and complain if absent. */
line = taf_next_line(parse_taf);
if (!line) {
sc_error("parse_get_taf_string:"
" out of TAF data at line %ld\n", parse_tafline);
parse_stack_backtrace();
LONG_JUMP0;
}
/* Note this line for possible pushback. */
parse_pushback_line = line;
}
/* Print out the line we're parsing if tracing. */
if (parse_trace)
sc_trace("Parse: read in line %ld : %s\n", parse_tafline, line);
parse_tafline++;
return line;
}
static sc_int parse_get_taf_integer(CONTEXT) {
const sc_char *line;
sc_int integer;
/* Get line, and scan for a single integer; return it. */
R0FUNC0(parse_get_taf_string, line);
if (sscanf(line, "%ld", &integer) != 1) {
sc_error("parse_get_taf_integer:"
" invalid integer at line %ld\n", parse_tafline - 1);
parse_stack_backtrace();
LONG_JUMP0;
}
return integer;
}
static sc_bool parse_get_taf_boolean(CONTEXT) {
const sc_char *line;
sc_uint boolean;
/*
* Get line, and scan for a single integer; check it's a valid-looking flag,
* and return it.
*/
R0FUNC0(parse_get_taf_string, line);
if (sscanf(line, "%lu", &boolean) != 1) {
sc_error("parse_get_taf_boolean:"
" invalid boolean at line %ld\n", parse_tafline - 1);
parse_stack_backtrace();
LONG_JUMP0;
}
if (boolean != 0 && boolean != 1) {
sc_error("parse_get_taf_boolean:"
" warning: suspect boolean at line %ld\n", parse_tafline - 1);
}
return boolean != 0;
}
static void parse_taf_pushback(void) {
if (parse_use_pushback || !parse_pushback_line)
sc_fatal("parse_taf_pushback: too much pushback requested\n");
/* Set pushback request, and decrement line counter. */
parse_use_pushback = TRUE;
parse_tafline--;
/* Note pushback for tracing purposes. */
if (parse_trace)
sc_trace("Parse: push back at line %ld\n", parse_tafline);
}
/* Enumerations of parse types found in the parse schema. */
enum {
PARSE_INTEGER = '#',
PARSE_DEFAULT_ZERO = 'Z',
PARSE_BOOLEAN = 'B',
PARSE_DEFAULT_FALSE = 'F',
PARSE_DEFAULT_TRUE = 'T',
PARSE_STRING = '$',
PARSE_DEFAULT_EMPTY = 'E',
PARSE_MULTILINE = 'M',
PARSE_VECTOR = 'V',
PARSE_VECTOR_ALTERNATE = 'W',
PARSE_ARRAY = '[',
PARSE_EXPRESSION = '?',
PARSE_EXPRESSION_NOT = '!',
PARSE_GLOBAL_EXPRESSION = 'G',
PARSE_CLASS = '<',
PARSE_FIXUP = '|',
PARSE_SPECIAL = '{',
PARSE_IGNORE_INTEGER = 'i',
PARSE_IGNORE_BOOLEAN = 'b',
PARSE_IGNORE_STRING = 's'
};
/* Forward declarations of parse functions for recursion. */
static void parse_element(CONTEXT, const sc_char *element);
static void parse_class(CONTEXT, const sc_char *class_);
static void parse_descriptor(CONTEXT, const sc_char *descriptor);
/*
* parse_array()
*
* Parse a descriptor [] array.
*/
static void parse_array(CONTEXT, const sc_char *array) {
sc_int count, index_;
sc_char element[PARSE_TEMP_LENGTH];
if (parse_trace)
sc_trace("Parse: entering array %s\n", array);
/* Find the count of elements in the array, and the element itself. */
if (sscanf(array, "[%ld]%[^ ]", &count, element) != 2)
sc_fatal("parse_array: bad array, %s\n", array);
/* Parse the element for array count iterations, each a key. */
for (index_ = 0; index_ < count; index_++) {
sc_vartype_t vt_key;
vt_key.integer = index_;
parse_push_key(vt_key, PROP_KEY_INTEGER);
CALL1(parse_element, element);
parse_pop_key();
}
if (parse_trace)
sc_trace("Parse: leaving array %s\n", array);
}
/*
* parse_vector_common()
* parse_vector()
* parse_vector_alternate()
*
* Parse a variable-length vector of properties.
*/
static void parse_vector_common(CONTEXT, const sc_char *vector, sc_int count) {
sc_int index_;
/* Parse the vector property count times, pushing a key on each. */
for (index_ = 0; index_ < count; index_++) {
sc_vartype_t vt_key;
vt_key.integer = index_;
parse_push_key(vt_key, PROP_KEY_INTEGER);
CALL1(parse_element, vector + 1);
parse_pop_key();
}
}
static void parse_vector(CONTEXT, const sc_char *vector) {
sc_int count;
if (parse_trace)
sc_trace("Parse: entering vector %s\n", vector);
/* Find the count of elements in the vector, and parse. */
FUNC0(parse_get_taf_integer, count);
CALL2(parse_vector_common, vector, count);
if (parse_trace)
sc_trace("Parse: leaving vector %s\n", vector);
}
static void parse_vector_alternate(CONTEXT, const sc_char *vector) {
sc_int count1;
if (parse_trace)
sc_trace("Parse: entering alternate vector %s\n", vector);
/* Element count, this is a vector described by size - 1. */
FUNC0(parse_get_taf_integer, count1);
CALL2(parse_vector_common, vector, count1 + 1);
if (parse_trace)
sc_trace("Parse: leaving alternate vector %s\n", vector);
}
/*
* parse_test_expression()
* parse_expression()
*
* Parse a conditional field definition, with runtime test.
*/
static sc_bool parse_test_expression(const sc_char *test_expression) {
sc_vartype_t vt_key;
sc_char plhs[PARSE_TEMP_LENGTH];
sc_int rhs;
sc_bool retval = FALSE;
/* Identify the type of expression to evaluate. */
switch (test_expression[0]) {
case PARSE_BOOLEAN:
/* Read boolean property and return its value. */
vt_key.string = test_expression + 1;
parse_push_key(vt_key, PROP_KEY_STRING);
retval = parse_get_boolean_property();
parse_pop_key();
break;
case PARSE_INTEGER:
/* Get the left and right sides of = comparison. */
if (sscanf(test_expression, "#%[^=]=%ld", plhs, &rhs) != 2) {
sc_fatal("parse_test_expression: bad = compare, %s\n",
test_expression + 1);
}
/* Read integer property and return comparison. */
vt_key.string = plhs;
parse_push_key(vt_key, PROP_KEY_STRING);
retval = (parse_get_integer_property() == rhs);
parse_pop_key();
break;
case PARSE_STRING:
/* Read property and return TRUE if not an empty string. */
vt_key.string = test_expression + 1;
parse_push_key(vt_key, PROP_KEY_STRING);
retval = !sc_strempty(parse_get_string_property());
parse_pop_key();
break;
case PARSE_GLOBAL_EXPRESSION: {
sc_vartype_t vt_gkey[2];
/* Read the given Global boolean property and return it. */
vt_gkey[0].string = "Globals";
vt_gkey[1].string = test_expression + 1;
retval = prop_get_boolean(parse_bundle, "B<-ss", vt_gkey);
break;
}
default:
sc_fatal("parse_test_expression:"
" bad expression, %s\n", test_expression + 1);
}
if (parse_trace)
sc_trace("Parse: expression is %s\n", retval ? "true" : "false");
return retval;
}
static void parse_expression(CONTEXT, const sc_char *expression) {
sc_char test_expression[PARSE_TEMP_LENGTH];
sc_bool is_present;
if (parse_trace)
sc_trace("Parse: entering expression %s\n", expression);
/* Isolate the test part of the expression. */
if (sscanf(expression, "?%[^:]", test_expression) != 1)
sc_fatal("parse_expression: bad expression, %s\n", expression);
/* Handle the remainder of the expression only if test passes. */
is_present = (test_expression[0] == PARSE_EXPRESSION_NOT)
? !parse_test_expression(test_expression + 1)
: parse_test_expression(test_expression);
if (is_present) {
sc_int next;
/*
* Following the ':' may be a single element, or a comma-separated list.
*/
for (next = strlen(test_expression) + 2; expression[next] != NUL;) {
sc_char element[PARSE_TEMP_LENGTH];
/* Get the next individual element to parse. */
if (sscanf(expression + next, "%[^,]", element) != 1)
sc_fatal("parse_expression: bad list, %s\n", expression + next);
/* Parse this isolated element. */
CALL1(parse_element, element);
/* Advance to the start of the next element. */
next += strlen(element);
next += strspn(expression + next, ",");
}
}