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veneer.c
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/* ------------------------------------------------------------------------- */
/* "veneer" : Compiling the run-time "veneer" of any routines invoked */
/* by the compiler (e.g. DefArt) which the program doesn't */
/* provide */
/* */
/* Part of Inform 6.43 */
/* copyright (c) Graham Nelson 1993 - 2024 */
/* */
/* ------------------------------------------------------------------------- */
#include "header.h"
int veneer_mode; /* Is the code currently being
compiled from the veneer? */
static debug_locations null_debug_locations =
{ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, NULL, 0 };
extern void compile_initial_routine(void)
{
/* The first routine present in memory in any Inform game, beginning
at the code area start position, always has 0 local variables
(since the interpreter begins execution with an empty stack frame):
and it must "quit" rather than "return".
(Pedantically, in Z-code 1-5, this is not a routine at all. It's
a sequence of opcodes which ends with "quit". The one-byte
header generated by assemble_routine_header() is a dummy.)
In order not to impose these restrictions on "Main", we compile a
trivial routine consisting of a call to "Main" followed by "quit". */
int32 j;
assembly_operand AO;
j = symbol_index("Main__", -1, NULL);
clear_local_variables();
assign_symbol(j,
assemble_routine_header(FALSE, "Main__", FALSE, j),
ROUTINE_T);
symbols[j].flags |= SYSTEM_SFLAG + USED_SFLAG;
if (trace_fns_setting==3) symbols[j].flags |= STAR_SFLAG;
if (!glulx_mode) {
INITAOTV(&AO, LONG_CONSTANT_OT, 0);
AO.marker = MAIN_MV;
sequence_point_follows = FALSE;
if (version_number > 3)
assemblez_1_to(call_vs_zc, AO, temp_var1);
else
assemblez_1_to(call_zc, AO, temp_var1);
assemblez_0(quit_zc);
}
else {
INITAOTV(&AO, CONSTANT_OT, 0);
AO.marker = MAIN_MV;
sequence_point_follows = FALSE;
assembleg_3(call_gc, AO, zero_operand, zero_operand);
assembleg_1(return_gc, zero_operand);
}
assemble_routine_end(FALSE, null_debug_locations);
}
/* ------------------------------------------------------------------------- */
/* The rest of the veneer is applied at the end of the pass, as required. */
/* ------------------------------------------------------------------------- */
static int veneer_routine_needs_compilation[VENEER_ROUTINES];
int32 veneer_routine_address[VENEER_ROUTINES];
static int veneer_symbols_base;
#define VR_UNUSED 0
#define VR_CALLED 1
#define VR_COMPILED 2
typedef struct VeneerRoutine_s
{ char *name;
char *source1;
char *source2;
char *source3;
char *source4;
char *source5;
char *source6;
} VeneerRoutine;
static char *veneer_source_area;
static VeneerRoutine VRs_z[VENEER_ROUTINES] =
{
/* Box__Routine: the only veneer routine used in the implementation of
an actual statement ("box", of course), written in a
hybrid of Inform and assembly language. Note the
transcription of the box text to the transcript
output stream (-1, or $ffff). */
{ "Box__Routine",
"maxw table n w w2 line lc t;\
n = table --> 0;\
@add n 6 -> sp;\
@split_window sp;\
@set_window 1;\
w = 0 -> 33;\
if (w == 0) w=80;\
w2 = (w - maxw)/2;\
if (w2 < 3) w2 = 3;\
style reverse;\
@sub w2 2 -> w;\
line = 5;\
lc = 1;\
@set_cursor 4 w;\
spaces maxw + 4;",
"do\
{ @set_cursor line w;\
spaces maxw + 4;\
@set_cursor line w2;\
t = table --> lc;\
if (t~=0) print (string) t;\
line++; lc++;\
} until (lc > n);\
@set_cursor line w;\
spaces maxw + 4;\
@buffer_mode 1;\
style roman;\
@set_window 0;\
@split_window 1;\
@output_stream $ffff;\
print \"[ \";\
lc = 1;",
"do\
{ w = table --> lc;\
if (w ~= 0) print (string) w;\
lc++;\
if (lc > n)\
{ print \"]^^\";\
break;\
}\
print \"^ \";\
} until (false);\
@output_stream 1;\
]", "", "", ""
},
/* This batch of routines is expected to be defined (rather better) by
the Inform library: these minimal forms here are provided to prevent
tiny non-library-using programs from failing to compile when certain
legal syntaxes (such as <<Action a b>>;) are used. */
{ "R_Process",
"a b c d; print \"Action <\", a, \" \", b, \" \", c;\
if (d) print \", \", d; print \">^\";\
]", "", "", "", "", ""
},
{ "DefArt",
"obj; print \"the \", obj; ]", "", "", "", "", ""
},
{ "InDefArt",
"obj; print \"a \", obj; ]", "", "", "", "", ""
},
{ "CDefArt",
"obj; print \"The \", obj; ]", "", "", "", "", ""
},
{ "CInDefArt",
"obj; print \"A \", obj; ]", "", "", "", "", ""
},
{ "PrintShortName",
"obj; switch(metaclass(obj))\
{ 0: print \"nothing\";\
Object: @print_obj obj;\
Class: print \"class \"; @print_obj obj;\
Routine: print \"(routine at \", obj, \")\";\
String: print \"(string at \", obj, \")\";\
} ]", "", "", "", "", ""
},
{ "EnglishNumber",
"obj; print obj; ]", "", "", "", "", ""
},
{ "Print__PName",
"prop p size cla i;\
if (prop & $c000)\
{ cla = #classes_table-->(prop & $ff);\
print (name) cla, \"::\";\
if ((prop & $8000) == 0) prop = (prop & $3f00)/$100;\
else\
{ prop = (prop & $7f00)/$100;\
i = cla.3;\
while ((i-->0 ~= 0) && (prop>0))\
{ i = i + i->2 + 3;\
prop--;\
}\
prop = (i-->0) & $7fff;\
}\
}",
"#IFDEF OMIT_SYMBOL_TABLE;\
p = size = 0;\
print \"<number \", prop, \">\";\
#IFNOT;\
p = #identifiers_table;\
size = p-->0;\
if (prop<=0 || prop>=size || p-->prop==0)\
print \"<number \", prop, \">\";\
else print (string) p-->prop;\
#ENDIF;\
]", "", "", "", ""
},
/* The remaining routines make up the run-time half of the object
orientation system, and need never be present for Inform 5 programs. */
{
/* WV__Pr: write a value to the property for the given
object having the given identifier */
"WV__Pr",
"obj identifier value x;\
x = obj..&identifier;\
if (x==0) { RT__Err(\"write to\", obj, identifier); return; }\
#ifdef INFIX;\
if (obj has infix__watching || (debug_flag & 15)) RT__TrPS(obj,identifier,value);\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15) RT__TrPS(obj,identifier,value);\
#endif; #endif;\
x-->0 = value;\
]", "", "", "", "", ""
},
{
/* RV__Pr: read a value from the property for the given
object having the given identifier */
"RV__Pr",
"obj identifier x;\
x = obj..&identifier;\
if (x==0)\
{ if (identifier >= 1 && identifier < 64 && obj.#identifier <= 2)\
return obj.identifier;\
RT__Err(\"read\", obj, identifier); return; }\
#IFV3;\
if (obj..#identifier > 2) RT__Err(\"read\", obj, identifier);\
#IFNOT;\
if (obj..#identifier > 2) RT__Err(\"read\", obj, identifier, 2);\
#ENDIF;\
return x-->0;\
]", "", "", "", "", ""
},
{ /* CA__Pr: call, that is, print-or-run-or-read, a property:
this exactly implements obj..prop(...). Note that
classes (members of Class) have 5 built-in properties
inherited from Class: create, recreate, destroy,
remaining and copy. Implementing these here prevents
the need for a full metaclass inheritance scheme. */
"CA__Pr",
"obj id a b c d e f x y z s s2 n m;\
#IFV3;\
#Message error \"Object message calls are not supported in v3.\";\
obj = id = a = b = c = d = e = f = x = y = z = s = s2 = n = m = 0;\
#IFNOT;\
if (obj < 1 || obj > #largest_object-255)\
{ switch(Z__Region(obj))\
{ 2: if (id == call)\
{ s = sender; sender = self; self = obj;\
#ifdef action;sw__var=action;#endif;\
x = indirect(obj, a, b, c, d, e, f);\
self = sender; sender = s; return x; }\
jump Call__Error;",
"3: if (id == print) { @print_paddr obj; rtrue; }\
if (id == print_to_array)\
{ @output_stream 3 a; @print_paddr obj; @output_stream -3;\
return a-->0; }\
jump Call__Error;\
}\
jump Call__Error;\
}\
@check_arg_count 3 ?~A__x;y++;@check_arg_count 4 ?~A__x;y++;\
@check_arg_count 5 ?~A__x;y++;@check_arg_count 6 ?~A__x;y++;\
@check_arg_count 7 ?~A__x;y++;@check_arg_count 8 ?~A__x;y++;.A__x;",
"#ifdef INFIX;if (obj has infix__watching) n=1;#endif;\
#ifdef DEBUG;if (debug_flag & 1 ~= 0) n=1;#endif;\
if (n==1) {\
#ifdef DEBUG;n=debug_flag & 1; debug_flag=debug_flag-n;#endif;\
print \"[ ~\", (name) obj, \"~.\", (property) id, \"(\";\
switch(y) { 1: print a; 2: print a,\",\",b; 3: print a,\",\",b,\",\",c;\
4: print a,\",\",b,\",\",c,\",\",d;\
5: print a,\",\",b,\",\",c,\",\",d,\",\",e;\
6: print a,\",\",b,\",\",c,\",\",d,\",\",e,\",\",f; }\
print \") ]^\";\
#ifdef DEBUG;debug_flag = debug_flag + n;#endif;\
}",
"if (id > 0 && id < 64)\
{ x = obj.&id; if (x==0) { x=$000a-->0 + 2*(id-1); n=2; }\
else n = obj.#id; }\
else\
{ if (id>=64 && id<69 && obj in Class)\
return Cl__Ms(obj,id,y,a,b,c,d);\
x = obj..&id;\
if (x == 0) { .Call__Error;\
RT__Err(\"send message\", obj, id); return; }\
n = 0->(x-1);\
if (id&$C000==$4000)\
switch (n&$C0) { 0: n=1; $40: n=2; $80: n=n&$3F; }\
}",
"for (:2*m<n:m++)\
{ if (x-->m==$ffff) rfalse;\
switch(Z__Region(x-->m))\
{ 2: s = sender; sender = self; self = obj; s2 = sw__var;\
#ifdef LibSerial;\
if (id==life) sw__var=reason_code; else sw__var=action;\
#endif;\
switch(y) { 0: z = indirect(x-->m); 1: z = indirect(x-->m, a);\
2: z = indirect(x-->m, a, b); 3: z = indirect(x-->m, a, b, c);",
"4: z = indirect(x-->m, a, b, c, d); 5:z = indirect(x-->m, a, b, c, d, e);\
6: z = indirect(x-->m, a, b, c, d, e, f); }\
self = sender; sender = s; sw__var = s2;\
if (z ~= 0) return z;\
3: print_ret (string) x-->m;\
default: return x-->m;\
}\
}\
#ENDIF;\
rfalse;\
]"
},
{
/* IB__Pr: ++(individual property) */
"IB__Pr",
"obj identifier x;\
x = obj..&identifier;\
if (x==0) { RT__Err(\"increment\", obj, identifier); return; }\
#ifdef INFIX;\
if (obj has infix__watching || (debug_flag & 15)) RT__TrPS(obj,identifier,(x-->0)+1);\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15) RT__TrPS(obj,identifier,(x-->0)+1);\
#endif; #endif;\
return ++(x-->0);\
]", "", "", "", "", ""
},
{
/* IA__Pr: (individual property)++ */
"IA__Pr",
"obj identifier x;\
x = obj..&identifier;\
if (x==0) { RT__Err(\"increment\", obj, identifier); return; }\
#ifdef INFIX;\
if (obj has infix__watching || (debug_flag & 15))\
RT__TrPS(obj,identifier,(x-->0)+1);\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15) RT__TrPS(obj,identifier,(x-->0)+1);\
#endif; #endif;\
return (x-->0)++;\
]", "", "", "", "", ""
},
{
/* DB__Pr: --(individual property) */
"DB__Pr",
"obj identifier x;\
x = obj..&identifier;\
if (x==0) { RT__Err(\"decrement\", obj, identifier); return; }\
#ifdef INFIX;\
if (obj has infix__watching || (debug_flag & 15)) RT__TrPS(obj,identifier,(x-->0)-1);\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15) RT__TrPS(obj,identifier,(x-->0)-1);\
#endif; #endif;\
return --(x-->0);\
]", "", "", "", "", ""
},
{
/* DA__Pr: (individual property)-- */
"DA__Pr",
"obj identifier x;\
x = obj..&identifier;\
if (x==0) { RT__Err(\"decrement\", obj, identifier); return; }\
#ifdef INFIX;\
if (obj has infix__watching || (debug_flag & 15)) RT__TrPS(obj,identifier,(x-->0)-1);\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15) RT__TrPS(obj,identifier,(x-->0)-1);\
#endif; #endif;\
return (x-->0)--;\
]", "", "", "", "", ""
},
{
/* RA__Pr: read the address of a property value for a given object,
returning 0 if it doesn't provide this individual
property */
"RA__Pr",
"obj identifier i otherid cla;\
if (obj==0) rfalse;\
if (identifier<64 && identifier>0) return obj.&identifier;\
if (identifier & $8000 ~= 0)\
{ cla = #classes_table-->(identifier & $ff);\
if (cla.&3 == 0) rfalse;\
if (~~(obj ofclass cla)) rfalse;\
identifier = (identifier & $7f00) / $100;\
i = cla.3;\
while (identifier>0)\
{ identifier--;\
i = i + i->2 + 3;\
}\
return i+3;\
}",
"if (identifier & $4000 ~= 0)\
{ cla = #classes_table-->(identifier & $ff);\
identifier = (identifier & $3f00) / $100;\
if (~~(obj ofclass cla)) rfalse; i=0-->5;\
if (cla == 2) return i+2*identifier-2;\
#IFV3;\
i = (i+60+cla*9)-->0;\
#IFNOT;\
i = 0-->((i+124+cla*14)/2);\
#ENDIF;\
i = CP__Tab(i + 2*(0->i) + 1, -1)+6;\
return CP__Tab(i, identifier);\
}\
if (obj.&3 == 0) rfalse;\
if (obj in 1)\
{ if (identifier<64 || identifier>=72) rfalse;\
}",
"if (self == obj)\
otherid = identifier | $8000;\
i = obj.3;\
while (i-->0 ~= 0)\
{ if (i-->0 == identifier or otherid)\
return i+3;\
i = i + i->2 + 3;\
}\
rfalse;\
]", "", "", ""
},
{
/* RL__Pr: read the property length of an individual property value,
returning 0 if it isn't provided by the given object.
This is also used for inherited values (of the form
class::prop). */
"RL__Pr",
"obj identifier x;\
if (identifier<64 && identifier>0) return obj.#identifier;\
x = obj..&identifier;\
if (x==0) rfalse;\
if (identifier&$C000==$4000) {\
#IFV3;\
return 1+((x-1)->0)/$20;\
#IFNOT;\
switch (((x-1)->0)&$C0)\
{ 0: return 1; $40: return 2; $80: return ((x-1)->0)&$3F; }\
#ENDIF;\
}\
return (x-1)->0;\
]", "", "", "", "", ""
},
{
/* RA__Sc: implement the "superclass" (::) operator,
returning an identifier */
"RA__Sc",
"cla identifier otherid i j k;\
if (cla notin 1 && cla > 4)\
{ RT__Err(\"be a '::' superclass\", cla, -1); rfalse; }\
if (self ofclass cla) otherid = identifier | $8000;\
for (j=0: #classes_table-->j ~= 0: j++)\
{ if (cla==#classes_table-->j)\
{ if (identifier < 64) return $4000 + identifier*$100 + j;\
if (cla.&3 == 0) break;\
i = cla.3;",
"while (i-->0 ~= 0)\
{ if (i-->0 == identifier or otherid)\
return $8000 + k*$100 + j;\
i = i + i->2 + 3;\
k++;\
}\
break;\
}\
}\
RT__Err(\"make use of\", cla, identifier);\
rfalse;\
]", "", "", "", ""
},
{
/* OP__Pr: test whether or not given object provides individual
property with the given identifier code */
"OP__Pr",
"obj identifier;\
if (obj<1 || obj > (#largest_object-255))\
{ if (identifier ~= print or print_to_array or call) rfalse;\
switch(Z__Region(obj))\
{ 2: if (identifier == call) rtrue;\
3: if (identifier == print or print_to_array) rtrue;\
}\
rfalse;\
}",
"if (identifier<64)\
{ if (obj.&identifier ~= 0) rtrue;\
rfalse;\
}\
if (obj..&identifier ~= 0) rtrue;\
if (identifier<72 && obj in 1) rtrue;\
rfalse;\
]", "", "", "", ""
},
{
/* OC__Cl: test whether or not given object is of the given class */
"OC__Cl",
"obj cla j a n;\
if (obj<1 || obj > (#largest_object-255))\
{ if (cla ~= 3 or 4) rfalse;\
if (Z__Region(obj) == cla-1) rtrue;\
rfalse;\
}\
if (cla == 1) {\
if (obj<=4) rtrue;\
if (obj in 1) rtrue;\
rfalse;\
} else if (cla == 2) {\
if (obj<=4) rfalse;\
if (obj in 1) rfalse;\
rtrue;\
} else if (cla == 3 or 4) {\
rfalse;\
}",
"if (cla notin 1) { RT__Err(\"apply 'ofclass' for\", cla, -1);rfalse;}\
@get_prop_addr obj 2 -> a;\
if (a==0) rfalse;\
@get_prop_len a -> n;\
for (j=0: j<n/2: j++)\
{ if (a-->j == cla) rtrue;\
}\
rfalse;\
]", "", "", "", ""
},
{ /* Copy__Primitive: routine to "deep copy" objects */
"Copy__Primitive",
"o1 o2 a1 a2 n m l size identifier;\
for (n=0:n<48:n++)\
{ if (o2 has n) give o1 n;\
else give o1 ~n;\
}\
for (n=1:n<64:n++) if (n~=2 or 3)\
{ a1 = o1.&n; a2 = o2.&n; size = o1.#n;\
if (a1~=0 && a2~=0 && size==o2.#n)\
{ for (m=0:m<size:m++) a1->m=a2->m;\
}\
}",
"if (o1.&3 == 0 || o2.&3 == 0) return;\
for (n=o2.3: n-->0 ~= 0: n = n + size + 3)\
{ identifier = n-->0;\
size = n->2;\
for (m=o1.3: m-->0 ~= 0: m = m + m->2 + 3)\
if ((identifier & $7fff == (m-->0) & $7fff) && size==m->2)\
for (l=3: l<size+3: l++) m->l = n->l;\
}\
]", "", "", "", ""
},
{ /* RT__Err: for run-time errors occurring in the above: e.g.,
an attempt to write to a non-existent individual
property */
"RT__Err",
"crime obj id size p q;\
print \"^[** Programming error: \";\
if (crime<0) jump RErr;\
if (crime==1) { print \"class \"; @print_obj obj;\
\": 'create' can have 0 to 3 parameters only **]\";}\
if (crime == 32) \"objectloop broken because the object \",\
(name) obj, \" was moved while the loop passed through it **]\";\
if (crime == 33) \"tried to print (char) \", obj,\
\", which is not a valid ZSCII character code for output **]\";\
if (crime == 34) \"tried to print (address) on something not the \",\
\"byte address of a string **]\";\
if (crime == 35) \"tried to print (string) on something not a \",\
\"string **]\";\
if (crime == 36) \"tried to print (object) on something not an \",\
\"object or class **]\";",
"if (crime < 32) { print \"tried to \";\
if (crime >= 28) { if (crime==28 or 29) print \"read from \";\
else print \"write to \";\
if (crime==29 or 31) print \"-\"; print \"->\", obj,\
\" in the\"; switch(size&7){0,1:q=0; 2:print \" string\";\
q=1; 3:print \" table\";q=1; 4:print \" buffer\";q=WORDSIZE;} \
if(size&16) print\" (->)\"; if(size&8) print\" (-->)\";\
#IFDEF OMIT_SYMBOL_TABLE;\
\" array which has entries \", q, \" up to \",id,\" **]\";\
#IFNOT;\
\" array ~\", (string) #array_names_offset-->p,\
\"~, which has entries \", q, \" up to \",id,\" **]\";\
#ENDIF;\
}\
if (crime >= 24 && crime <=27) { if (crime<=25) print \"read\";\
else print \"write\"; print \" outside memory using \";\
switch(crime) { 24,26:\"-> **]\"; 25,27:\"--> **]\"; } }\
if (crime < 4) print \"test \"; else\
if (crime < 12 || crime > 20) print \"find the \"; else\
if (crime < 14) print \"use \";\
if (crime==20) \"divide by zero **]\"; print \"~\";\
switch(crime) {\
2: print \"in~ or ~notin\"; 3: print \"has~ or ~hasnt\";\
4: print \"parent\"; 5: print \"eldest\"; 6: print \"child\";\
7: print \"younger\"; 8: print \"sibling\"; 9: print \"children\";\
10: print \"youngest\"; 11: print \"elder\";\
12: print \"objectloop\"; 13: print \"}~ at end of ~objectloop\";\
14: \"give~ an attribute to \", (name) obj, \" **]\";\
15: \"remove~ \", (name) obj, \" **]\";",
"16,17,18: print \"move~ \", (name) obj, \" to \", (name) id;\
if (crime==18) { print \", which would make a loop: \",(name) obj;\
p=id; if (p==obj) p=obj;\
else do { print \" in \", (name) p; p=parent(p);} until (p==obj);\
\" in \", (name) p, \" **]\"; }\
\" **]\"; 19: \"give~ or test ~has~ or ~hasnt~ with a non-attribute"\
" on the object \",(name) obj,\" **]\";\
21: print \".&\"; 22: print \".#\"; 23: print \".\"; }\
\"~ of \", (name) obj, \" **]\"; }",
".RErr; if (obj>=0 && obj<=(#largest_object-255)) {\
if (obj && obj in Class) print \"class \";\
if (obj) @print_obj obj;else print \"nothing\";print\" \";}\
print \"(object number \", obj, \") \";\
if (id<0) print \"is not of class \", (name) -id;",
"else if (size) print \"has a property \", (property) id,\
\", but it is longer than 2 bytes so you cannot use ~.~\";\
else\
{ print \" has no property \", (property) id;\
#IFNDEF OMIT_SYMBOL_TABLE;\
p = #identifiers_table;\
size = p-->0;\
if (id<0 || id>=size)\
print \" (and nor has any other object)\";\
#ENDIF;\
}\
print \" to \", (string) crime, \" **]^\";\
]", ""
},
{ /* Z__Region: Determines whether a value is:
1 an object number
2 a code address
3 a string address
0 none of the above */
"Z__Region",
"addr top;\
if (addr==0 or -1) rfalse;\
top = addr;\
#IfV5; #iftrue (#version_number == 6) || (#version_number == 7);\
@log_shift addr $FFFF -> top; #Endif; #Endif;\
if (Unsigned__Compare(top, $001A-->0) >= 0) rfalse;\
if (addr>=1 && addr<=(#largest_object-255)) rtrue;\
#iftrue #oddeven_packing;\
@test addr 1 ?~NotString;\
if (Unsigned__Compare(addr, #strings_offset)<0) rfalse;\
return 3;\
.NotString;\
if (Unsigned__Compare(addr, #code_offset)<0) rfalse;\
return 2;\
#ifnot;\
if (Unsigned__Compare(addr, #strings_offset)>=0) return 3;\
if (Unsigned__Compare(addr, #code_offset)>=0) return 2;\
rfalse;\
#endif;\
]", "", "", "", "", ""
},
{ /* Unsigned__Compare: returns 1 if x>y, 0 if x=y, -1 if x<y */
"Unsigned__Compare",
"x y u v;\
if (x==y) return 0;\
if (x<0 && y>=0) return 1;\
if (x>=0 && y<0) return -1;\
u = x&$7fff; v= y&$7fff;\
if (u>v) return 1;\
return -1;\
]", "", "", "", "", ""
},
{ /* Meta__class: returns the metaclass of an object */
"Meta__class",
"obj;\
switch(Z__Region(obj))\
{ 2: return Routine;\
3: return String;\
1: if (obj in 1 || obj <= 4) return Class;\
return Object;\
}\
rfalse;\
]", "", "", "", "", ""
},
{ /* CP__Tab: searches a common property table for the given
identifier, thus imitating the get_prop_addr opcode.
Returns 0 if not provided, except:
if the identifier supplied is -1, then returns
the address of the first byte after the table. */
"CP__Tab",
"x id n l;\
#IFV3;\
while (1)\
{ n = x->0;\
if (n == 0) break;\
x++;\
if (id == (n & $1f)) return x;\
l = (n/$20)+1;\
x = x + l;\
}\
#IFNOT;\
while ((n=0->x) ~= 0)\
{ if (n & $80) { x++; l = (0->x) & $3f; }\
else { if (n & $40) l=2; else l=1; }\
x++;\
if ((n & $3f) == id) return x;\
x = x + l;\
}\
#ENDIF;\
if (id<0) return x+1; rfalse; ]", "", "", "", "", ""
},
{ /* Cl__Ms: the five message-receiving properties of Classes */
"Cl__Ms",
"obj id y a b c d x;\
#IFV3;\
#Message error \"Class messages are not supported in v3.\";\
obj = id = y = a = b = c = d = x = 0;\
#IFNOT;\
switch(id)\
{ create:\
if (children(obj)<=1) rfalse; x=child(obj);\
remove x; if (x provides create) { if (y==0) x..create();\
if (y==1) x..create(a); if (y==2) x..create(a,b);\
if (y>3) RT__Err(1,obj); if (y>=3) x..create(a,b,c);}\
return x;\
recreate:\
if (~~(a ofclass obj))\
{ RT__Err(\"recreate\", a, -obj); rfalse; }\
Copy__Primitive(a, child(obj));\
if (a provides create) { if (y==1) a..create();\
if (y==2) a..create(b); if (y==3) a..create(b,c);\
if (y>4) RT__Err(1,obj); if (y>=4) a..create(b,c,d);\
} rfalse;",
"destroy:\
if (~~(a ofclass obj))\
{ RT__Err(\"destroy\", a, -obj); rfalse; }\
if (a provides destroy) a..destroy();\
Copy__Primitive(a, child(obj));\
move a to obj; rfalse;\
remaining:\
return children(obj)-1;",
"copy:\
if (~~(a ofclass obj))\
{ RT__Err(\"copy\", a, -obj); rfalse; }\
if (~~(b ofclass obj))\
{ RT__Err(\"copy\", b, -obj); rfalse; }\
Copy__Primitive(a, b); rfalse;\
}\
#ENDIF;\
]", "", "", ""
},
{ /* RT__ChT: check at run-time that a proposed object move is legal
cause error and do nothing if not; otherwise move */
"RT__ChT",
"obj1 obj2 x;\
if (obj1<5 || obj1>(#largest_object-255) || obj1 in 1)\
return RT__Err(16,obj1,obj2);\
if (obj2<5 || obj2>(#largest_object-255) || obj2 in 1)\
return RT__Err(17,obj1,obj2);",
"x=obj2; while (x~=0) { if (x==obj1) return RT__Err(18,obj1,obj2); \
x=parent(x); }\
#ifdef INFIX;\
if (obj1 has infix__watching\
|| obj2 has infix__watching || (debug_flag & 15))\
print \"[Moving \", (name) obj1, \" to \", (name) obj2, \"]^\";\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15)\
print \"[Moving \", (name) obj1, \" to \", (name) obj2, \"]^\";\
#endif; #endif;\
@insert_obj obj1 obj2; ]", "", "", "", ""
},
{ /* RT__ChR: check at run-time that a proposed object remove is legal
cause error and do nothing if not; otherwise remove */
"RT__ChR",
"obj1;\
if (obj1<5 || obj1>(#largest_object-255) || obj1 in 1)\
return RT__Err(15,obj1);",
"#ifdef INFIX;\
if (obj1 has infix__watching || (debug_flag & 15))\
print \"[Removing \", (name) obj1, \"]^\";\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15)\
print \"[Removing \", (name) obj1, \"]^\";\
#endif; #endif;\
@remove_obj obj1; ]", "", "", "", ""
},
{ /* RT__ChG: check at run-time that a proposed attr give is legal
cause error and do nothing if not; otherwise give */
"RT__ChG",
"obj1 a;\
if (obj1<5 || obj1>(#largest_object-255) || obj1 in 1)\
return RT__Err(14,obj1); if (a<0 || a>=48) return RT__Err(19,obj1);\
if (obj1 has a) return;",
"#ifdef INFIX;\
if (a ~= workflag && (obj1 has infix__watching || (debug_flag & 15)))\
print \"[Giving \", (name) obj1, \" \", (DebugAttribute) a, \"]^\";\
#ifnot; #ifdef DEBUG;\
if (a ~= workflag && debug_flag & 15)\
print \"[Giving \", (name) obj1, \" \", (DebugAttribute) a, \"]^\";\
#endif; #endif;\
@set_attr obj1 a; ]", "", "", "", ""
},
{ /* RT__ChGt: check at run-time that a proposed attr give ~ is legal
cause error and do nothing if not; otherwise give */
"RT__ChGt",
"obj1 a;\
if (obj1<5 || obj1>(#largest_object-255) || obj1 in 1)\
return RT__Err(14,obj1); if (a<0 || a>=48) return RT__Err(19,obj1);\
if (obj1 hasnt a) return;",
"#ifdef INFIX;\
if (a ~= workflag && (obj1 has infix__watching || (debug_flag & 15)))\
print \"[Giving \",(name) obj1,\" @@126\", (DebugAttribute) a, \"]^\";\
#ifnot; #ifdef DEBUG;\
if (a ~= workflag && debug_flag & 15)\
print \"[Giving \",(name) obj1,\" @@126\", (DebugAttribute) a, \"]^\";\
#endif; #endif;\
@clear_attr obj1 a; ]", "", "", "", ""
},
{ /* RT__ChPS: check at run-time that a proposed property set is legal
cause error and do nothing if not; otherwise make it */
"RT__ChPS",
"obj prop val size;\
if (obj<5 || obj>(#largest_object-255) || obj in 1 || obj.&prop==0 || (size=obj.#prop)>2 )\
return RT__Err(\"set\", obj, prop, size);\
@put_prop obj prop val;",
"#ifdef INFIX;\
if (obj has infix__watching || (debug_flag & 15)) RT__TrPS(obj,prop,val);\
#ifnot; #ifdef DEBUG;\
if (debug_flag & 15) RT__TrPS(obj,prop,val);\
#endif; #endif;\
return val; ]", "", "", "", ""
},
{ /* RT__ChPR: check at run-time that a proposed property read is legal
cause error and return 0 if not; otherwise read it */
"RT__ChPR",
"obj prop val size;\
if (obj<5 || obj>(#largest_object-255) || (size=obj.#prop)>2)\
{RT__Err(\"read\", obj, prop, size); obj=2;}\
@get_prop obj prop -> val;",
"return val; ]", "", "", "", ""
},
{ /* RT__TrPS: trace property settings */
"RT__TrPS",
"obj prop val;\
print \"[Setting \",(name) obj,\".\",(property) prop,\
\" to \",val,\"]^\"; ]",
"", "", "", "", ""
},
{ /* RT__ChLDB: check at run-time that it's safe to load a byte
and return the byte */
"RT__ChLDB",
"base offset a val;\
a=base+offset;if (Unsigned__Compare(a,#readable_memory_offset)>=0)\
return RT__Err(24);",
"@loadb base offset -> val;return val; ]", "", "", "", ""
},
{ /* RT__ChLDW: check at run-time that it's safe to load a word
and return the word */
"RT__ChLDW",
"base offset a val;\
a=base+2*offset;if (Unsigned__Compare(a,#readable_memory_offset)>=0)\
return RT__Err(25);",
"@loadw base offset -> val;return val; ]", "", "", "", ""
},
{ /* RT__ChSTB: check at run-time that it's safe to store a byte
and store it */
"RT__ChSTB",
"base offset val a f;\
a=base+offset;\
if (Unsigned__Compare(a,#array__start)>=0\
&& Unsigned__Compare(a,#array__end)<0) f=1; else\
if (Unsigned__Compare(a,#cpv__start)>=0\
&& Unsigned__Compare(a,#cpv__end)<0) f=1; else\
if (Unsigned__Compare(a,#ipv__start)>=0\
&& Unsigned__Compare(a,#ipv__end)<0) f=1; else\
if (a==$0011) f=1;\
if (f==0) return RT__Err(26);",
"@storeb base offset val; ]", "", "", "", ""
},
{ /* RT__ChSTW: check at run-time that it's safe to store a word
and store it */
"RT__ChSTW",
"base offset val a f;\
a=base+2*offset;\
if (Unsigned__Compare(a,#array__start)>=0\
&& Unsigned__Compare(a,#array__end)<0) f=1; else\
if (Unsigned__Compare(a,#cpv__start)>=0\
&& Unsigned__Compare(a,#cpv__end)<0) f=1; else\
if (Unsigned__Compare(a,#ipv__start)>=0\
&& Unsigned__Compare(a,#ipv__end)<0) f=1; else\
if (a==$0010) f=1;\
if (f==0) return RT__Err(27);",
"@storew base offset val; ]", "", "", "", ""
},
{ /* RT__ChPrintC: check at run-time that it's safe to print (char)
and do so */
"RT__ChPrintC",
"c fl;\
if (c==0 or 9 or 11 or 13) fl=1;\
if (c>=32 && c<=126) fl=1; if (c>=155 && c<=251) fl=1;\
if (fl==0) return RT__Err(33,c);",
"@print_char c; ]", "", "", "", ""
},
{ /* RT__ChPrintA: check at run-time that it's safe to print (address)
and do so */
"RT__ChPrintA",
"a;\
if (Unsigned__Compare(a, #readable_memory_offset)>=0)\
return RT__Err(34);",
"@print_addr a; ]", "", "", "", ""
},
{ /* RT__ChPrintS: check at run-time that it's safe to print (string)
and do so */
"RT__ChPrintS",
"a;\
if (Z__Region(a)~=3) return RT__Err(35);",
"@print_paddr a; ]", "", "", "", ""
},
{ /* RT__ChPrintO: check at run-time that it's safe to print (object)
and do so */
"RT__ChPrintO",
"a;\
if (Z__Region(a)~=1) return RT__Err(36);",
"@print_obj a; ]", "", "", "", ""
}
};
static VeneerRoutine VRs_g[VENEER_ROUTINES] =
{
{
/* Box__Routine: Display the given array of text as a box quote.
This is a very simple implementation; the library should provide
a fancier version.
*/
"Box__Routine",
"maxwid arr ix;\
maxwid = 0;\
glk($0086, 7);\
for (ix=0 : ix<arr-->0 : ix++) {\
print (string) arr-->(ix+1);\
new_line;\
}\
glk($0086, 0);\
]", "", "", "", "", ""
},
/* This batch of routines is expected to be defined (rather better) by
the Inform library: these minimal forms here are provided to prevent
tiny non-library-using programs from failing to compile when certain
legal syntaxes (such as <<Action a b>>;) are used. */
{ "R_Process",
"a b c d; print \"Action <\", a, \" \", b, \" \", c;\
if (d) print \", \", d; print \">^\";\
]", "", "", "", "", ""
},
{ "DefArt",
"obj; print \"the \", obj; ]", "", "", "", "", ""
},
{ "InDefArt",
"obj; print \"a \", obj; ]", "", "", "", "", ""
},
{ "CDefArt",
"obj; print \"The \", obj; ]", "", "", "", "", ""
},
{ "CInDefArt",
"obj; print \"A \", obj; ]", "", "", "", "", ""
},
{ "PrintShortName",