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post-1.6src.lzh
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postop2.c
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1991-04-17
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/* PostScript interpreter file "postop2.c" - operators (2) */
/* (C) Adrian Aylward 1989, 1991 */
# include "post.h"
/* index */
void opindex(void)
{ struct object *token1;
int num;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typeint) error(errtypecheck);
num = token1->value.ival;
if (num < 0 || num > opernest - 2) error(errrangecheck);
*token1 = *(token1 - num - 1);
}
/* known */
void opknown(void)
{ struct object token, *token1, *token2;
int bool;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typedict) error(errtypecheck);
bool = dictget(token1->value.vref, token2, &token, flagrprot);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = bool;
*token1 = token;
opernest -= 1;
}
/* le */
void ople(void)
{ struct object token, *token1, *token2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = (compare(token1, token2) <= 0);
*token1 = token;
opernest--;
}
/* length */
void oplength(void)
{ struct object token, *token1;
struct dictionary *dict;
struct name *name;
int length;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type == typearray || token1->type == typepacked ||
token1->type == typestring)
{ if (token1->flags & flagrprot) error(errinvalidaccess);
length = token1->length;
}
else if (token1->type == typedict)
{ dict = vmdptr(token1->value.vref);
if (dict->flags & flagrprot) error(errinvalidaccess);
length = dict->full;
}
else if (token1->type == typename)
{ name = vmnptr(token1->value.vref);
length = name->length;
}
else
error(errtypecheck);
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = length;
*token1 = token;
}
/* ln */
void opln(void)
{ struct object token, *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
token = *token1;
if (token.type == typeint)
{ token.type = typereal;
token.value.rval = token.value.ival;
}
if (token.type == typereal)
token.value.rval = (float) log((double) token.value.rval);
else
error(errtypecheck);
*token1 = token;
}
/* load */
void opload(void)
{ struct object *token;
if (opernest < 1) error(errstackunderflow);
token = &operstack[opernest - 1];
if (dictfind(token, token) == -1) error(errundefined);
}
/* log */
void oplog(void)
{ struct object token, *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
token = *token1;
if (token.type == typeint)
{ token.type = typereal;
token.value.rval = token.value.ival;
}
if (token.type == typereal)
token.value.rval = (float) log10((double) token.value.rval);
else
error(errtypecheck);
*token1 = token;
}
/* loop */
void oploop(void)
{ struct object token, *token1, *tokenx;
if (currtoken->flags & flagctrl)
{ token1 = &execstack[execnest - 2];
token1[2] = *token1;
execnest++;
}
else
{ if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typearray && token1->type != typepacked)
error(errtypecheck);
if (execnest + 3 > execstacksize) error(errexecstackoverflow);
tokenx = &execstack[execnest];
*tokenx++ = *token1;
token = *currtoken;
token.flags &= ~flagexec;
token.flags |= flagctrl | flagloop;
token.length = 2;
*tokenx = token;
execnest += 2;
opernest -= 1;
}
}
/* lt */
void oplt(void)
{ struct object token, *token1, *token2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = (compare(token1, token2) < 0);
*token1 = token;
opernest--;
}
/* maxlength */
void opmaxlength(void)
{ struct object token, *token1;
struct dictionary *dict;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typedict) error(errtypecheck);
dict = vmdptr(token1->value.vref);
if (dict->flags & flagrprot) error(errinvalidaccess);
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = dict->size;
*token1 = token;
}
/* mod */
void opmod(void)
{ struct object *token1, *token2;
int num1, num2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typeint || token2->type != typeint)
error(errtypecheck);
num1 = token1->value.ival;
num2 = token2->value.ival;
if (num2 == 0) error(errundefinedresult);
token1->value.ival = num1 % num2;
opernest--;
}
/* mul */
void opmul(void)
{ struct object token, *token1, *token2;
int num1, num2, tmp1, tmp2;
unsigned int neg;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type == typeint && token2->type == typeint)
{ num1 = token1->value.ival;
num2 = token2->value.ival;
neg = 0x7fffffff;
if (num1 < 0)
{ neg = ~neg;
num1 = -num1;
}
if (num2 < 0)
{ neg = ~neg;
num2 = -num2;
}
tmp1 = (unsigned) num1 >> 16;
tmp2 = (unsigned) num2 >> 16;
num1 &= 0xffff;
num2 &= 0xffff;
if (tmp1 == 0)
{ if (tmp2 == 0)
{ num1 *= num2;
if ((unsigned) num1 <= neg)
{ token1->value.ival = (neg == 0x7fffffff) ? num1 : -num1;
opernest--;
return;
}
}
else
{ tmp2 *= num1;
num1 *= num2;
tmp1 = tmp2 + ((unsigned) num1 >> 16);
num1 += tmp2 << 16;
if ((tmp1 & 0xffff0000) == 0 && (unsigned) num1 <= neg)
{ token1->value.ival = (neg == 0x7fffffff) ? num1 : -num1;
opernest--;
return;
}
}
}
else
if (tmp2 == 0)
{ tmp1 *= num2;
num2 *= num1;
tmp2 = tmp1 + ((unsigned) num2 >> 16);
num2 += tmp1 << 16;
if ((tmp2 & 0xffff0000) == 0 && (unsigned) num2 <= neg)
{ token1->value.ival = (neg == 0x7fffffff) ? num2 : -num2;
opernest--;
return;
}
}
}
token = *token1;
if (token.type == typeint)
{ token.type = typereal;
token.value.rval = token.value.ival;
}
else
if (token.type != typereal) error(errtypecheck);
if (token2->type == typeint)
token.value.rval *= token2->value.ival;
else
{ if (token2->type != typereal) error(errtypecheck);
token.value.rval *= token2->value.rval;
}
*token1 = token;
opernest--;
}
/* ne */
void opne(void)
{ struct object token, *token1, *token2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = !equal(token1, token2);
*token1 = token;
opernest--;
}
/* neg */
void opneg(void)
{ struct object *token1;
int num1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type == typeint)
{ num1 = token1->value.ival;
if (num1 < 0)
{ num1 = -num1;
if (num1 < 0)
{ token1->type = typereal;
token1->value.rval = -((float) num1);
}
else
token1->value.ival = num1;
}
else
token1->value.ival = -num1;
}
else if (token1->type == typereal)
token1->value.rval = -token1->value.rval;
else
error(errtypecheck);
}
/* noaccess */
void opnoaccess(void)
{ struct object *token1;
int type;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
type = token1->type;
if (type == typefile || type == typestring ||
type == typearray || type == typepacked)
token1->flags |= (flagwprot | flagrprot | flagxprot);
else if (type == typedict)
vmdptr(token1->value.vref)->flags |= (flagwprot | flagrprot);
else
error(errtypecheck);
}
/* not */
void opnot(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type == typebool)
token1->value.ival = !token1->value.ival;
else if (token1->type == typeint)
token1->value.ival = ~token1->value.ival;
else
error(errtypecheck);
}
/* null */
void opnull(void)
{ struct object token;
if (opernest == operstacksize) error(errstackoverflow);
token.type = typenull;
token.flags = 0;
token.length = 0;
token.value.ival = 0;
operstack[opernest++] = token;
}
/* or */
void opor(void)
{ struct object *token1, *token2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if ((token1->type == typebool && token2->type == typebool) ||
(token1->type == typeint && token2->type == typeint))
token1->value.ival |= token2->value.ival;
else
error(errtypecheck);
opernest--;
}
/* packedarray */
void oppackedarray(void)
{ struct object token, *token1, *aptr;
int length;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typeint) error(errtypecheck);
length = token1->value.ival;
if (length < 0) error(errrangecheck);
if (opernest < length + 1) error(errstackunderflow);
aptr = token1 - length;
token.type = typepacked;
token.flags = flagwprot;
token.length = length;
token.value.vref = arraypack(aptr, length);
*aptr = token;
opernest -= length;
}
/* pop */
void oppop(void)
{ if (opernest < 1) error(errstackunderflow);
opernest -= 1;
}
/* print */
void opprint(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typestring) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (sstdout)
putmem(sstdout, vmsptr(token1->value.vref), token1->length);
opernest--;
}
/* prompts */
void opprompts(void)
{ struct object *token1, *token2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typestring) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (token1->length > promptsize) error(errrangecheck);
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagrprot) error(errinvalidaccess);
if (token2->length > promptsize) error(errrangecheck);
memcpy(prompt1, vmsptr(token1->value.vref), token1->length);
prompt1[token1->length] = 0;
memcpy(prompt2, vmsptr(token2->value.vref), token2->length);
prompt2[token2->length] = 0;
opernest -= 2;
}
/* pstack */
void oppstack(void)
{ int nest = opernest;
if (sstdout)
while (nest)
{ printeqeq(sstdout, &operstack[--nest], 0, 0);
putch(sstdout, '\n');
}
}
/* put */
void opput(void)
{ struct object *token1, *token2, *token3;
int num;
if (opernest < 3) error(errstackunderflow);
token3 = &operstack[opernest - 1];
token2 = token3 - 1;
token1 = token2 - 1;
if (token1->type == typedict)
dictput(token1->value.vref, token2, token3);
else
{ if (token2->type != typeint) error(errtypecheck);
num = token2->value.ival;
if (token1->type == typestring)
{ if (token3->type != typeint) error(errtypecheck);
if (token1->flags & flagwprot) error(errinvalidaccess);
if (num < 0 || num >= token1->length) error(errrangecheck);
vmsptr(token1->value.vref)[num] = token3->value.ival;
}
else if (token1->type == typearray)
{ if (token1->flags & flagwprot) error(errinvalidaccess);
if (num < 0 || num >= token1->length) error(errrangecheck);
arraysave(token1->value.vref, token1->length);
vmaptr(token1->value.vref)[num] = *token3;
}
else
error(errtypecheck);
}
opernest -= 3;
}
/* putinterval */
void opputinterval(void)
{ struct object *token1, *token2, *token3;
int num, len;
if (opernest < 3) error(errstackunderflow);
token3 = &operstack[opernest - 1];
token2 = token3 - 1;
token1 = token2 - 1;
if (token2->type != typeint) error(errtypecheck);
num = token2->value.ival;
if (token3->type != token1->type) error(errtypecheck);
len = token3->length;
if (token1->type == typestring)
{ if (token1->flags & flagwprot) error(errinvalidaccess);
if (token3->flags & flagrprot) error(errinvalidaccess);
if (num < 0 || num > token1->length) error(errrangecheck);
if (len < 0 || num + len > token1->length) error(errrangecheck);
memcpy(vmsptr(token1->value.vref) + num,
vmsptr(token3->value.vref), len);
}
else if (token1->type == typearray)
{ if (token1->flags & flagwprot) error(errinvalidaccess);
if (token3->flags & flagrprot) error(errinvalidaccess);
if (num < 0 || num > token1->length) error(errrangecheck);
if (len < 0 || num + len > token1->length) error(errrangecheck);
arraysave(token1->value.vref, token1->length);
arraycopy(vmaptr(token1->value.vref) + num,
vmaptr(token3->value.vref), len);
}
else
error(errtypecheck);
opernest -= 3;
}
/* quit */
void opquit(void)
{ execnest = 0;
errorjmp(0, 1);
}
/* rand */
void oprand(void)
{ struct object token;
if (opernest == operstacksize) error(errstackoverflow);
random *= 0x41c64e6d;
random += 0x3039;
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = random >> 1;
operstack[opernest++] = token;
}
/* rcheck */
void oprcheck(void)
{ struct object token, *token1;
int type, bool;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
type = token1->type;
if (type == typefile || type == typestring ||
type == typearray || type == typepacked)
bool = ((token1->flags & flagrprot) == 0);
else if (type == typedict)
bool = ((vmdptr(token1->value.vref)->flags & flagrprot) == 0);
else
error(errtypecheck);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = bool;
*token1 = token;
}
/* read */
void opread(void)
{ struct object token, *token1;
int ch;
if (opernest < 1) error(errstackunderflow);
if (opernest == operstacksize) error(errstackoverflow);
token1 = &operstack[opernest - 1];
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (filecheck(token1, openread) == NULL) error(errioerror);
ch = readch(token1, -2);
token.flags = 0;
token.length = 0;
if (ch == EOF)
{ fileclose(token1);
token.value.ival = 0;
}
else
{ token.type = typeint;
token.value.ival = ch;
*token1++ = token;
token.value.ival = 1;
opernest++;
}
token.type = typebool;
*token1 = token;
}
/* readhexstring */
void opreadhexstring(void)
{ struct object token, *token1, *token2;
char *sptr;
int ch, length, num, dig, sw;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (filecheck(token1, openread) == NULL) error(errioerror);
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagwprot) error(errinvalidaccess);
length = 0;
sptr = vmsptr(token2->value.vref);
ch = 0;
sw = 1;
while (length < token2->length)
{ ch = readch(token1, -1);
if (ch == EOF) break;
dig = digitval(ch);
if (dig >= 16) continue;
if (sw)
{ sw = 0;
num = dig * 16;
}
else
{ sw = 1;
num += dig;
*sptr++ = num;
length++;
}
}
token = *token2;
token.length = length;
*token1 = token;
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = (ch != EOF);
*token2 = token;
}
/* readline */
void opreadline(void)
{ struct object token, *token1, *token2;
char *sptr;
int ch, length;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (filecheck(token1, openread) == NULL) error(errioerror);
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagwprot) error(errinvalidaccess);
length = 0;
sptr = vmsptr(token2->value.vref);
ch = 0;
for (;;)
{ ch = readch(token1, -1);
if (ch == '\n' || ch == EOF) break;
if (length == token2->length) error(errrangecheck);
*sptr++ = ch;
length++;
}
token = *token2;
token.length = length;
*token1 = token;
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = (ch != EOF);
*token2 = token;
}
/* readonly */
void opreadonly(void)
{ struct object *token1;
struct dictionary *dict;
int type;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
type = token1->type;
if (type == typefile || type == typestring ||
type == typearray || type == typepacked)
{ if (token1->flags & flagrprot) error(errinvalidaccess);
token1->flags |= flagwprot;
}
else if (type == typedict)
{ dict = vmdptr(token1->value.vref);
if (dict->flags & flagrprot) error(errinvalidaccess);
dict->flags |= flagwprot;
}
else
error(errtypecheck);
}
/* readstring */
void opreadstring(void)
{ struct object token, *token1, *token2;
char *sptr;
int ch, length;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (filecheck(token1, openread) == NULL) error(errioerror);
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagwprot) error(errinvalidaccess);
length = 0;
sptr = vmsptr(token2->value.vref);
ch = 0;
while (length < token2->length)
{ ch = readch(token1, -2);
if (ch == EOF) break;
*sptr++ = ch;
length++;
}
token = *token2;
token.length = length;
*token1 = token;
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = (ch != EOF);
*token2 = token;
}
/* repeat */
void oprepeat(void)
{ struct object token, *token1, *token2, *tokenx;
if (currtoken->flags & flagctrl)
{ token2 = &execstack[execnest - 2];
token1 = token2 - 1;
if (token1->value.ival <= 0)
{ execnest -= 3;
return;
}
token1->value.ival--;
token2[2] = *token2;
execnest++;
}
else
{ if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typeint) error(errtypecheck);
if (token2->type != typearray && token2->type != typepacked)
error(errtypecheck);
if (execnest + 4 > execstacksize) error(errexecstackoverflow);
tokenx = &execstack[execnest];
*tokenx++ = *token1;
*tokenx++ = *token2;
token = *currtoken;
token.flags &= ~flagexec;
token.flags |= flagctrl | flagloop;
token.length = 3;
*tokenx = token;
execnest += 3;
opernest -= 2;
}
}
/* resetfile */
void opresetfile(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typefile) error(errtypecheck);
if (filecheck(token1, openread | openwrite) == NULL) error(errioerror);
opernest--;
}
/* restore */
void oprestore(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typesave) error(errtypecheck);
vmrest(token1->length, token1->value.ival);
opernest--;
}
/* roll */
void oproll(void)
{ struct object *token1, *token2;
int num, dir, shf;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typeint) error(errtypecheck);
num = token1->value.ival;
if (token2->type != typeint) error(errtypecheck);
dir = token2->value.ival;
if (num < 0 || num > opernest - 2) error(errrangecheck);
dir = dir % num;
shf = num - dir;
if (opernest + shf - 2 > operstacksize) error(errstackoverflow);
opernest -= 2;
arraycopy(token1, token1 - num, shf);
arraycopy(token1 - num, token1 - dir, num);
}
/* round */
void opround(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type == typeint)
return;
else if (token1->type == typereal)
token1->value.rval = (float) floor((double) token1->value.rval + .5);
else
error(errtypecheck);
}
/* rrand */
void oprrand(void)
{ struct object token;
if (opernest == operstacksize) error(errstackoverflow);
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = random;
operstack[opernest++] = token;
}
/* run */
void oprun(void)
{ struct object token, *token1, *tokenx;
if (currtoken->flags & flagctrl)
execnest -= 2;
else
{ if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typestring) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
if (execnest + 3 > execstacksize) error(errexecstackoverflow);
tokenx = &execstack[execnest];
fileopen(&token, openread, vmsptr(token1->value.vref),
token1->length);
token.flags |= flagexec;
tokenx[0] = token;
tokenx[2] = token;
token = *currtoken;
token.flags &= ~flagexec;
token.flags |= flagctrl | flagrun;
token.length = 2;
tokenx[1] = token;
execnest += 3;
opernest--;
}
}
/* save */
void opsave(void)
{ struct object token;
if (opernest == operstacksize) error(errstackoverflow);
vmsave(&token);
operstack[opernest++] = token;
}
/* search */
void opsearch(void)
{ struct object *token1, *token2;
char *sptr1, *sptr2;
int len1, len2, offs, bool;
struct object token;
if (opernest < 2) error(errstackunderflow);
if (opernest + 2 > operstacksize) error(errstackoverflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typestring) error(errtypecheck);
if (token1->flags & flagrprot) error(errinvalidaccess);
len1 = token1->length;
sptr1 = vmsptr(token1->value.vref);
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagrprot) error(errinvalidaccess);
len2 = token2->length;
sptr2 = vmsptr(token2->value.vref);
offs = 0;
bool = 0;
while (offs + len2 <= len1)
{ if (memcmp(sptr1 + offs, sptr2, len2) == 0)
{ bool = 1;
break;
}
offs++;
}
if (bool)
{ token = *token1;
token.length = offs;
*(token2 + 1) = token;
token.length = len2;
token.value.vref = token1->value.vref + offs;
*token2 = token;
token.length = len1 - offs - len2;
token.value.vref = token1->value.vref + offs + len2;
*token1 = token;
token2 += 2;
opernest += 2;
}
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = bool;
*token2 = token;
}
/* setpacking */
void opsetpacking(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typebool) error(errtypecheck);
packing = token1->value.ival;
opernest--;
}
/* sin */
void opsin(void)
{ struct object token, *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
token = *token1;
if (token.type == typeint)
{ token.type = typereal;
token.value.rval = token.value.ival;
}
if (token.type == typereal)
token.value.rval = (float) sin((double) token.value.rval * degtorad);
else
error(errtypecheck);
*token1 = token;
}
/* sqrt */
void opsqrt(void)
{ struct object token, *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
token = *token1;
if (token.type == typeint)
{ token.type = typereal;
token.value.rval = token.value.ival;
}
if (token.type == typereal)
{ if (token.value.rval < 0.0) error(errrangecheck);
token.value.rval = (float) sqrt((double) token.value.rval);
}
else
error(errtypecheck);
*token1 = token;
}
/* srand */
void opsrand(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typeint) error(errrangecheck);
random = token1->value.ival;
opernest--;
}
/* stack */
void opstack(void)
{ int nest = opernest;
if (sstdout)
while (nest)
{ printequals(sstdout, &operstack[--nest]);
putch(sstdout, '\n');
}
}
/* status */
void opstatus(void)
{ struct object token, *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typefile) error(errtypecheck);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival =
(filecheck(token1, openread | openwrite) != NULL);
*token1 = token;
}
/* stop */
void opstop(void)
{ stop();
error(errinvalidstop);
}
/* stopped */
void opstopped(void)
{ struct object token, *token1, *tokenx;
if (opernest == operstacksize) error(errstackoverflow);
if (currtoken->flags & flagctrl)
{ if (opernest == operstacksize) error(errstackoverflow);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = 0;
operstack[opernest++] = token;
execnest -= 2;
}
else
{ if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (execnest + 3 > execstacksize) error(errexecstackoverflow);
tokenx = &execstack[execnest];
tokenx[0] = *token1;
token = *currtoken;
token.flags &= ~flagexec;
token.flags |= flagctrl | flagstop;
token.length = inest;
tokenx[1] = token;
tokenx[2] = *token1;
execnest += 3;
opernest--;
}
}
/* store */
void opstore(void)
{ struct object token, *token1, *token2;
int nest;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
nest = dictfind(token1, &token);
if (nest == -1) nest = dictnest - 1;
dictput(dictstack[nest].value.vref, token1, token2);
opernest -= 2;
}
/* string */
void opstring(void)
{ struct object token, *token1;
int length;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type != typeint) error(errtypecheck);
length = token1->value.ival;
if (length < 0 || length > 65535) error(errrangecheck);
token.type = typestring;
token.flags = 0;
token.length = token1->value.ival;
token.value.vref = vmalloc(length);
*token1 = token;
}
/* sub */
void opsub(void)
{ struct object token, *token1, *token2;
int num1, num2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type == typeint && token2->type == typeint)
{ num1 = token1->value.ival;
num2 = token2->value.ival;
if (num1 > 0 && num2 < 0)
{ num1 -= num2;
if (num1 > 0)
{ token1->value.ival = num1;
opernest--;
return;
}
}
else if (num1 < 0 && num2 > 0)
{ num1 -= num2;
if (num1 < 0)
{ token1->value.ival = num1;
opernest--;
return;
}
}
else
{ num1 -= num2;
token1->value.ival = num1;
opernest--;
return;
}
}
token = *token1;
if (token.type == typeint)
{ token.type = typereal;
token.value.rval = token.value.ival;
}
else
if (token.type != typereal) error(errtypecheck);
if (token2->type == typeint)
token.value.rval -= token2->value.ival;
else
{ if (token2->type != typereal) error(errtypecheck);
token.value.rval -= token2->value.rval;
}
*token1 = token;
opernest--;
}
/* token */
void optoken(void)
{ struct object token, *token1;
int bool;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type == typefile)
{ if (opernest + 1 > operstacksize) error(errstackoverflow);
bool = scantoken(&token, token1, -1);
if (bool)
{ *token1++ = token;
opernest++;
}
else
fileclose(token1);
}
else if (token1->type == typestring)
{ if (opernest + 2 > operstacksize) error(errstackoverflow);
bool = scantoken(&token, token1, -1);
if (bool)
{ token1++;
*token1++ = token;
opernest += 2;
}
}
else
error(errtypecheck);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = bool;
*token1 = token;
}
/* truncate */
void optruncate(void)
{ struct object *token1;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
if (token1->type == typeint)
return;
else if (token1->type == typereal)
if (token1->value.rval > 0.0)
token1->value.rval = (float) floor((double) token1->value.rval);
else
token1->value.rval = (float) ceil((double) token1->value.rval);
else
error(errtypecheck);
}
/* type */
void optype(void)
{ struct object token, *token1;
char *sptr;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
sptr = typetable[token1->type];
nametoken(&token, sptr, -1, flagexec);
*token1 = token;
}
/* usertime */
void opusertime(void)
{ struct object token;
if (opernest == operstacksize) error(errstackoverflow);
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = usertime();
operstack[opernest++] = token;
}
/* vmhwm */
void opvmhwm(void)
{ struct object token, *token1;
if (opernest + 2 > operstacksize) error(errstackoverflow);
token1 = &operstack[opernest];
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = vmhwm;
token1[0] = token;
token.value.ival = vmmax;
token1[1] = token;
opernest += 2;
vmhwm = vmused;
}
/* vmstatus */
void opvmstatus(void)
{ struct object token, *token1;
if (opernest + 3 > operstacksize) error(errstackoverflow);
token1 = &operstack[opernest];
token.type = typeint;
token.flags = 0;
token.length = 0;
token.value.ival = vmnest;
token1[0] = token;
token.value.ival = vmused;
token1[1] = token;
token.value.ival = vmmax;
token1[2] = token;
opernest += 3;
}
/* wcheck */
void opwcheck(void)
{ struct object token, *token1;
int type, bool;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
type = token1->type;
if (type == typefile || type == typestring ||
type == typearray || type == typepacked)
bool = ((token1->flags & flagwprot) == 0);
else if (type == typedict)
bool = ((vmdptr(token1->value.vref)->flags & flagwprot) == 0);
else
error(errtypecheck);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = bool;
*token1 = token;
}
/* where */
void opwhere(void)
{ struct object token, *token1;
int nest;
if (opernest < 1) error(errstackunderflow);
if (opernest + 2 > operstacksize) error(errstackoverflow);
token1 = &operstack[opernest - 1];
nest = dictfind(token1, &token);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = 0;
if (nest != -1)
{ *token1++ = dictstack[nest];
opernest++;
token.value.ival = 1;
}
*token1 = token;
}
/* write */
void opwrite(void)
{ struct object *token1, *token2;
struct file *file;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagwprot) error(errinvalidaccess);
file = filecheck(token1, openwrite);
if (file == NULL) error(errioerror);
if (token2->type != typeint) error(errtypecheck);
if (putc(token2->value.ival, file->fptr) == EOF) error(errioerror);
opernest -= 2;
}
/* writehexstring */
void opwritehexstring(void)
{ struct object *token1, *token2;
struct file *file;
FILE *fptr;
char *sptr;
int length, ch, num;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagwprot) error(errinvalidaccess);
file = filecheck(token1, openwrite);
if (file == NULL) error(errioerror);
fptr = file->fptr;
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagrprot) error(errinvalidaccess);
length = token2->length;
sptr = vmsptr(token2->value.vref);
while (length--)
{ num = *(unsigned char *)(sptr++);
ch = num >> 4;
ch += (ch < 10) ? '0' : 'a' - 10;
if (putc(ch, fptr) == EOF) error(errioerror);
ch = num & 15;
ch += (ch < 10) ? '0' : 'a' - 10;
if (putc(ch, fptr) == EOF) error(errioerror);
}
opernest -= 2;
}
/* writestring */
void opwritestring(void)
{ struct object *token1, *token2;
struct file *file;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if (token1->type != typefile) error(errtypecheck);
if (token1->flags & flagwprot) error(errinvalidaccess);
file = filecheck(token1, openwrite);
if (file == NULL) error(errioerror);
if (token2->type != typestring) error(errtypecheck);
if (token2->flags & flagrprot) error(errinvalidaccess);
putmem(file->fptr, vmsptr(token2->value.vref), token2->length);
opernest -= 2;
}
/* xcheck */
void opxcheck(void)
{ struct object token, *token1;
int bool;
if (opernest < 1) error(errstackunderflow);
token1 = &operstack[opernest - 1];
bool = ((token1->flags & flagexec) != 0);
token.type = typebool;
token.flags = 0;
token.length = 0;
token.value.ival = bool;
*token1 = token;
}
/* xor */
void opxor(void)
{ struct object *token1, *token2;
if (opernest < 2) error(errstackunderflow);
token2 = &operstack[opernest - 1];
token1 = token2 - 1;
if ((token1->type == typebool && token2->type == typebool) ||
(token1->type == typeint && token2->type == typeint))
token1->value.ival ^= token2->value.ival;
else
error(errtypecheck);
opernest--;
}
/* Initialise the operators (2) */
void initop2(void)
{ systemop(opindex, "index");
systemop(opknown, "known");
systemop(ople, "le");
systemop(oplength, "length");
systemop(opln, "ln");
systemop(opload, "load");
systemop(oplog, "log");
systemop(oploop, "loop");
systemop(oplt, "lt");
systemop(opmaxlength, "maxlength");
systemop(opmod, "mod");
systemop(opmul, "mul");
systemop(opne, "ne");
systemop(opneg, "neg");
systemop(opnoaccess, "noaccess");
systemop(opnot, "not");
systemop(opnull, "null");
systemop(opor, "or");
systemop(oppackedarray, "packedarray");
systemop(oppop, "pop");
systemop(opprint, "print");
systemop(opprompts, "prompts");
systemop(oppstack, "pstack");
systemop(opput, "put");
systemop(opputinterval, "putinterval");
systemop(opquit, "quit");
systemop(oprcheck, "rcheck");
systemop(oprand, "rand");
systemop(opread, "read");
systemop(opreadhexstring, "readhexstring");
systemop(opreadline, "readline");
systemop(opreadonly, "readonly");
systemop(opreadstring, "readstring");
systemop(oprepeat, "repeat");
systemop(opresetfile, "resetfile");
systemop(oprestore, "restore");
systemop(oproll, "roll");
systemop(opround, "round");
systemop(oprrand, "rrand");
systemop(oprun, "run");
systemop(opsave, "save");
systemop(opsearch, "search");
systemop(opsetpacking, "setpacking");
systemop(opsin, "sin");
systemop(opsqrt, "sqrt");
systemop(opsrand, "srand");
systemop(opstack, "stack");
systemop(opstatus, "status");
systemop(opstop, "stop");
systemop(opstopped, "stopped");
systemop(opstore, "store");
systemop(opstring, "string");
systemop(opsub, "sub");
systemop(optoken, "token");
systemop(optruncate, "truncate");
systemop(optype, "type");
systemop(opusertime, "usertime");
systemop(opvmhwm, "vmhwm");
systemop(opvmstatus, "vmstatus");
systemop(opwcheck, "wcheck");
systemop(opwhere, "where");
systemop(opwrite, "write");
systemop(opwritehexstring, "writehexstring");
systemop(opwritestring, "writestring");
systemop(opxcheck, "xcheck");
systemop(opxor, "xor");
}
/* End of file "postop2.c" */