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#ifndef lint |
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static const char RCSid[] = "$Id: misc.c,v 1.2 2003/07/03 22:41:44 schorsch Exp $"; |
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#endif |
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/* |
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* Miscellaneous functions for meta-files |
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*/ |
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|
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#include "meta.h" |
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|
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char coms[] = COML; |
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|
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char errmsg[128]; |
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|
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|
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int |
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comndx(c) /* return index for command */ |
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|
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register int c; |
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|
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{ |
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register char *cp; |
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|
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if (!isalpha(c)) |
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return(-1); |
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|
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for (cp = coms; *cp; cp++) |
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if(*cp == c) |
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return(cp-coms); |
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|
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return(-1); |
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} |
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PRIMITIVE * |
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pop(pl) /* pop top off plist */ |
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|
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register PLIST *pl; |
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|
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{ |
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register PRIMITIVE *p; |
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|
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if ((p = pl->ptop) != NULL) { |
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if ((pl->ptop = p->pnext) == NULL) |
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pl->pbot = NULL; |
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p->pnext = NULL; |
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} |
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|
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return(p); |
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} |
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push(p, pl) /* push primitive onto plist */ |
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register PRIMITIVE *p; |
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register PLIST *pl; |
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|
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{ |
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if ((p->pnext = pl->ptop) == NULL) |
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pl->pbot = p; |
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pl->ptop = p; |
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} |
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add(p, pl) /* add primitive to plist */ |
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register PRIMITIVE *p; |
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register PLIST *pl; |
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|
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{ |
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|
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if (pl->ptop == NULL) |
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pl->ptop = p; |
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else |
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pl->pbot->pnext = p; |
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p->pnext = NULL; |
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pl->pbot = p; |
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} |
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append(pl1, pl2) /* append pl1 to the end of pl2 */ |
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register PLIST *pl1, *pl2; |
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{ |
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if (pl1->ptop != NULL) { |
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if (pl2->ptop != NULL) |
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pl2->pbot->pnext = pl1->ptop; |
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else |
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pl2->ptop = pl1->ptop; |
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pl2->pbot = pl1->pbot; |
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} |
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} |
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fargs(p) /* free any arguments p has */ |
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register PRIMITIVE *p; |
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{ |
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|
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if (p->args != NULL) { |
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freestr(p->args); |
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p->args = NULL; |
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} |
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|
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} |
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char * |
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nextscan(start, format, result) /* scan and advance through string */ |
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register char *start; |
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char *format; |
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char *result; |
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{ |
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if (start == NULL) return(NULL); |
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while (isspace(*start)) start++; |
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if (sscanf(start, format, result) != 1) return(NULL); |
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while (*start && !isspace(*start)) start++; |
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return(start); |
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} |
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mcopy(p1, p2, n) /* copy p2 into p1 size n */ |
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register char *p1, *p2; |
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register int n; |
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{ |
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while (n--) |
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*p1++ = *p2++; |
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|
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} |
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