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#include <math.h> |
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#include <stdlib.h> |
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#include "rtmisc.h" |
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#include "rtio.h" |
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#include "rterror.h" |
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#include "calcomp.h" |
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|
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unsigned int esupport = /* what to support */ |
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E_VARIABLE | E_FUNCTION ; |
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|
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int eofc = 0; /* optional end-of-file character */ |
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int nextc; /* lookahead character */ |
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|
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double (*eoper[])(EPNODE *) = { /* expression operations */ |
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|
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|
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EPNODE * |
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eparse(expr) /* parse an expression string */ |
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char *expr; |
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eparse( /* parse an expression string */ |
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char *expr |
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) |
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{ |
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EPNODE *ep; |
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|
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|
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|
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double |
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eval(expr) /* evaluate an expression string */ |
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char *expr; |
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eval( /* evaluate an expression string */ |
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char *expr |
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) |
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{ |
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register EPNODE *ep; |
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double rval; |
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|
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|
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int |
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epcmp(ep1, ep2) /* compare two expressions for equivalence */ |
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register EPNODE *ep1, *ep2; |
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epcmp( /* compare two expressions for equivalence */ |
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register EPNODE *ep1, |
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register EPNODE *ep2 |
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) |
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{ |
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double d; |
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|
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case ':': |
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return(epcmp(ep1->v.kid->sibling, ep2->v.kid->sibling)); |
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|
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case TICK: |
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case CLKT: |
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case SYM: /* should never get this one */ |
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return(0); |
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void |
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epfree(epar) /* free a parse tree */ |
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register EPNODE *epar; |
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epfree( /* free a parse tree */ |
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register EPNODE *epar |
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) |
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{ |
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register EPNODE *ep; |
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|
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case NUM: |
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case CHAN: |
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case ARG: |
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case TICK: |
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case CLKT: |
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break; |
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|
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default: |
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|
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/* the following used to be a switch */ |
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static double |
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eargument(ep) |
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EPNODE *ep; |
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eargument( |
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EPNODE *ep |
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) |
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{ |
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return(argument(ep->v.chan)); |
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} |
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|
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static double |
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enumber(ep) |
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EPNODE *ep; |
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enumber( |
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EPNODE *ep |
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) |
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{ |
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return(ep->v.num); |
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} |
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|
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static double |
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euminus(ep) |
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EPNODE *ep; |
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euminus( |
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EPNODE *ep |
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> |
) |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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|
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} |
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|
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static double |
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echannel(ep) |
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< |
EPNODE *ep; |
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echannel( |
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> |
EPNODE *ep |
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) |
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{ |
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return(chanvalue(ep->v.chan)); |
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} |
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|
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static double |
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eadd(ep) |
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EPNODE *ep; |
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eadd( |
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> |
EPNODE *ep |
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) |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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|
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} |
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|
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static double |
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esubtr(ep) |
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EPNODE *ep; |
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esubtr( |
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EPNODE *ep |
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) |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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|
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} |
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|
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static double |
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emult(ep) |
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EPNODE *ep; |
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emult( |
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EPNODE *ep |
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) |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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|
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} |
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|
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static double |
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edivi(ep) |
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EPNODE *ep; |
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edivi( |
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EPNODE *ep |
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) |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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double d; |
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} |
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|
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static double |
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< |
epow(ep) |
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< |
EPNODE *ep; |
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> |
epow( |
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> |
EPNODE *ep |
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) |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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double d; |
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lasterrno = errno; |
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errno = 0; |
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d = pow(evalue(ep1), evalue(ep1->sibling)); |
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#ifdef IEEE |
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< |
if (!finite(d)) |
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< |
errno = EDOM; |
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> |
#ifdef isnan |
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> |
if (errno == 0) |
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if (isnan(d)) |
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errno = EDOM; |
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else if (isinf(d)) |
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errno = ERANGE; |
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#endif |
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if (errno == EDOM || errno == ERANGE) { |
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wputs("Illegal power\n"); |
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} |
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|
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static double |
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ebotch(ep) |
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EPNODE *ep; |
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ebotch( |
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EPNODE *ep |
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) |
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{ |
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eputs("Bad expression!\n"); |
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quit(1); |
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|
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|
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EPNODE * |
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ekid(ep, n) /* return pointer to a node's nth kid */ |
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< |
register EPNODE *ep; |
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< |
register int n; |
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ekid( /* return pointer to a node's nth kid */ |
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> |
register EPNODE *ep, |
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> |
register int n |
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> |
) |
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{ |
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|
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for (ep = ep->v.kid; ep != NULL; ep = ep->sibling) |
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|
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|
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int |
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nekids(ep) /* return # of kids for node ep */ |
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< |
register EPNODE *ep; |
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> |
nekids( /* return # of kids for node ep */ |
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> |
register EPNODE *ep |
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> |
) |
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{ |
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register int n = 0; |
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|
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|
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|
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void |
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initfile(fp, fn, ln) /* prepare input file */ |
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< |
FILE *fp; |
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char *fn; |
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< |
int ln; |
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> |
initfile( /* prepare input file */ |
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> |
FILE *fp, |
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> |
char *fn, |
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> |
int ln |
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> |
) |
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{ |
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static char inpbuf[MAXLINE]; |
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|
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|
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|
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void |
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< |
initstr(s, fn, ln) /* prepare input string */ |
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< |
char *s; |
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< |
char *fn; |
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< |
int ln; |
372 |
> |
initstr( /* prepare input string */ |
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> |
char *s, |
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> |
char *fn, |
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> |
int ln |
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> |
) |
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{ |
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infp = NULL; |
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infile = fn; |
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|
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|
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void |
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< |
getscanpos(fnp, lnp, spp, fpp) /* return current scan position */ |
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< |
char **fnp; |
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< |
int *lnp; |
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< |
char **spp; |
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< |
FILE **fpp; |
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> |
getscanpos( /* return current scan position */ |
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> |
char **fnp, |
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> |
int *lnp, |
391 |
> |
char **spp, |
392 |
> |
FILE **fpp |
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> |
) |
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{ |
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if (fnp != NULL) *fnp = infile; |
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if (lnp != NULL) *lnp = lineno; |
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|
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|
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int |
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< |
scan() /* scan next character, return literal next */ |
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> |
scan(void) /* scan next character, return literal next */ |
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{ |
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register int lnext = 0; |
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|
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nextc = linbuf[linepos++]; |
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if (!lnext) |
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lnext = nextc; |
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+ |
if (nextc == eofc) { |
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+ |
nextc = EOF; |
422 |
+ |
break; |
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} |
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if (nextc == '{') { |
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scan(); |
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while (nextc != '}') |
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|
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|
|
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char * |
439 |
< |
long2ascii(l) /* convert long to ascii */ |
440 |
< |
long l; |
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> |
long2ascii( /* convert long to ascii */ |
440 |
> |
long l |
441 |
> |
) |
442 |
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{ |
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static char buf[16]; |
444 |
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register char *cp; |
463 |
|
|
464 |
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|
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void |
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< |
syntax(err) /* report syntax error and quit */ |
467 |
< |
char *err; |
466 |
> |
syntax( /* report syntax error and quit */ |
467 |
> |
char *err |
468 |
> |
) |
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{ |
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register int i; |
471 |
|
|
490 |
|
|
491 |
|
|
492 |
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void |
493 |
< |
addekid(ep, ekid) /* add a child to ep */ |
494 |
< |
register EPNODE *ep; |
495 |
< |
EPNODE *ekid; |
493 |
> |
addekid( /* add a child to ep */ |
494 |
> |
register EPNODE *ep, |
495 |
> |
EPNODE *ekid |
496 |
> |
) |
497 |
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{ |
498 |
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if (ep->v.kid == NULL) |
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ep->v.kid = ekid; |
507 |
|
|
508 |
|
|
509 |
|
char * |
510 |
< |
getname() /* scan an identifier */ |
510 |
> |
getname(void) /* scan an identifier */ |
511 |
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{ |
512 |
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static char str[RMAXWORD+1]; |
513 |
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register int i, lnext; |
524 |
|
|
525 |
|
|
526 |
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int |
527 |
< |
getinum() /* scan a positive integer */ |
527 |
> |
getinum(void) /* scan a positive integer */ |
528 |
|
{ |
529 |
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register int n, lnext; |
530 |
|
|
539 |
|
|
540 |
|
|
541 |
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double |
542 |
< |
getnum() /* scan a positive float */ |
542 |
> |
getnum(void) /* scan a positive float */ |
543 |
|
{ |
544 |
|
register int i, lnext; |
545 |
|
char str[RMAXWORD+1]; |
581 |
|
|
582 |
|
|
583 |
|
EPNODE * |
584 |
< |
getE1() /* E1 -> E1 ADDOP E2 */ |
584 |
> |
getE1(void) /* E1 -> E1 ADDOP E2 */ |
585 |
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/* E2 */ |
586 |
|
{ |
587 |
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register EPNODE *ep1, *ep2; |
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|
|
604 |
|
|
605 |
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EPNODE * |
606 |
< |
getE2() /* E2 -> E2 MULOP E3 */ |
606 |
> |
getE2(void) /* E2 -> E2 MULOP E3 */ |
607 |
|
/* E3 */ |
608 |
|
{ |
609 |
|
register EPNODE *ep1, *ep2; |
625 |
|
|
626 |
|
|
627 |
|
EPNODE * |
628 |
< |
getE3() /* E3 -> E4 ^ E3 */ |
628 |
> |
getE3(void) /* E3 -> E4 ^ E3 */ |
629 |
|
/* E4 */ |
630 |
|
{ |
631 |
|
register EPNODE *ep1, *ep2; |
647 |
|
|
648 |
|
|
649 |
|
EPNODE * |
650 |
< |
getE4() /* E4 -> ADDOP E5 */ |
650 |
> |
getE4(void) /* E4 -> ADDOP E5 */ |
651 |
|
/* E5 */ |
652 |
|
{ |
653 |
|
register EPNODE *ep1, *ep2; |
660 |
|
return(ep2); |
661 |
|
} |
662 |
|
if (ep2->type == UMINUS) { /* don't generate -(-E5) */ |
663 |
+ |
ep1 = ep2->v.kid; |
664 |
|
efree((char *)ep2); |
665 |
< |
return(ep2->v.kid); |
665 |
> |
return(ep1); |
666 |
|
} |
667 |
|
ep1 = newnode(); |
668 |
|
ep1->type = UMINUS; |
676 |
|
|
677 |
|
|
678 |
|
EPNODE * |
679 |
< |
getE5() /* E5 -> (E1) */ |
679 |
> |
getE5(void) /* E5 -> (E1) */ |
680 |
|
/* VAR */ |
681 |
|
/* NUM */ |
682 |
|
/* $N */ |
754 |
|
|
755 |
|
|
756 |
|
EPNODE * |
757 |
< |
rconst(epar) /* reduce a constant expression */ |
758 |
< |
register EPNODE *epar; |
757 |
> |
rconst( /* reduce a constant expression */ |
758 |
> |
register EPNODE *epar |
759 |
> |
) |
760 |
|
{ |
761 |
|
register EPNODE *ep; |
762 |
|
|
773 |
|
|
774 |
|
|
775 |
|
int |
776 |
< |
isconstvar(ep) /* is ep linked to a constant expression? */ |
777 |
< |
register EPNODE *ep; |
776 |
> |
isconstvar( /* is ep linked to a constant expression? */ |
777 |
> |
register EPNODE *ep |
778 |
> |
) |
779 |
|
{ |
780 |
|
register EPNODE *ep1; |
781 |
|
|
799 |
|
|
800 |
|
|
801 |
|
int |
802 |
< |
isconstfun(ep) /* is ep linked to a constant function? */ |
803 |
< |
register EPNODE *ep; |
802 |
> |
isconstfun( /* is ep linked to a constant function? */ |
803 |
> |
register EPNODE *ep |
804 |
> |
) |
805 |
|
{ |
806 |
|
register EPNODE *dp; |
807 |
|
register LIBR *lp; |