6.1.10 Data Type Representations
IMMEDIATE: B,D,E,F=data bit, C=flag code, P=pointer address bit
................................
inum BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB10
ichr BBBBBBBBBBBBBBBBBBBBBBBB11110100
iflag CCCCCCC101110100
isym CCCCCCC001110100
IMCAR: only in car of evaluated code, cdr has cell's GC bit
ispcsym 000CCCC00CCCC100
iloc 0DDDDDDDDDDDEFFFFFFFFFFF11111100
pointer PPPPPPPPPPPPPPPPPPPPPPPPPPPPP000
gloc PPPPPPPPPPPPPPPPPPPPPPPPPPPPP001
HEAP CELL: G=gc_mark; 1 during mark, 0 other times.
1s and 0s here indicate type. G missing means sys (not GC'd)
SIMPLE
cons ..........SCM car..............0 ...........SCM cdr.............G
closure ..........SCM code...........011 ...........SCM env...........CCG
HEADERs:
ssymbol .........long length....G0000101 ..........char *chars...........
msymbol .........long length....G0000111 ..........char *chars...........
string .........long length....G0001101 ..........char *chars...........
vector .........long length....G0001111 ...........SCM **elts...........
VfixN8 .........long length....G0010101 ......unsigned char *words......
VfixZ8 .........long length....G0010111 ..........char *words...........
VfixN16 .........long length....G0011101 ......unsigned short *words.....
VfixZ16 .........long length....G0011111 ........ short *words...........
VfixN32 .........long length....G0100101 ......unsigned medium *words....
VfixZ32 .........long length....G0100111 ........medium *words...........
VfixN64 .........long length....G0101101 ......unsigned long *words......
VfixZ64 .........long length....G0101111 ..........long *words...........
VfloR32 .........long length....G0110101 .........float *words...........
VfloC32 .........long length....G0110111 .........float *words...........
VfloR64 .........long length....G0111101 ........double *words...........
VfloC64 .........long length....G0111111 ........double *words...........
Vbool .........long length....G1000101 ..........long *words...........
contin .........long length....G1001101 .............*regs..............
specfun ................xxxxxxxxG1001111 ...........SCM name.............
cclo ..short length..xxxxxx10G1001111 ...........SCM **elts...........
PTOBs
port int portnum.CwroxxxxxxxxG1000111 ..........FILE *stream..........
socket int portnum.C001xxxxxxxxG1000111 ..........FILE *stream..........
inport int portnum.C011xxxxxxxxG1000111 ..........FILE *stream..........
outport int portnum.0101xxxxxxxxG1000111 ..........FILE *stream..........
ioport int portnum.C111xxxxxxxxG1000111 ..........FILE *stream..........
fport int portnum.C 00000000G1000111 ..........FILE *stream..........
pipe int portnum.C 00000001G1000111 ..........FILE *stream..........
strport 00000000000.0 00000010G1000111 ..........FILE *stream..........
sfport int portnum.C 00000011G1000111 ..........FILE *stream..........
SUBRs
subr_0 ..........int hpoff.....01010101 ...........SCM (*f)()...........
subr_1 ..........int hpoff.....01010111 ...........SCM (*f)()...........
cxr ..........int hpoff.....01011101 .........double (*f)()..........
subr_3 ..........int hpoff.....01011111 ...........SCM (*f)()...........
subr_2 ..........int hpoff.....01100101 ...........SCM (*f)()...........
asubr ..........int hpoff.....01100111 ...........SCM (*f)()...........
subr_1o ..........int hpoff.....01101101 ...........SCM (*f)()...........
subr_2o ..........int hpoff.....01101111 ...........SCM (*f)()...........
lsubr_2 ..........int hpoff.....01110101 ...........SCM (*f)()...........
lsubr ..........int hpoff.....01110111 ...........SCM (*f)()...........
rpsubr ..........int hpoff.....01111101 ...........SCM (*f)()...........
SMOBs
free_cell
000000000000000000000000G1111111 ...........*free_cell........000
flo 000000000000000000000001G1111111 ...........float num............
dblr 000000000000000100000001G1111111 ..........double *real..........
dblc 000000000000001100000001G1111111 .........complex *cmpx..........
bignum ...int length...0000001 G1111111 .........short *digits..........
bigpos ...int length...00000010G1111111 .........short *digits..........
bigneg ...int length...00000011G1111111 .........short *digits..........
xxxxxxxx = code assigned by newsmob();
promise 000000000000000fxxxxxxxxG1111111 ...........SCM val..............
arbiter 000000000000000lxxxxxxxxG1111111 ...........SCM name.............
macro 000000000000000mxxxxxxxxG1111111 ...........SCM name.............
array ...short rank..cxxxxxxxxG1111111 ............*array..............