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#ifndef lint |
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static const char RCSid[] = "$Id: trans.c,v 2.4 2003/06/08 12:03:09 schorsch Exp $"; |
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#endif |
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/* |
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* Translator utilities |
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* |
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* Greg Ward |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "rterror.h" |
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#include "trans.h" |
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|
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static int idcmp(ID *id1, ID *id2); |
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static void fputidlist(IDLIST *qp, FILE *fp); |
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static int qtype(char *qnm, register QLIST *qlp); |
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|
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extern int |
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fgetid( /* read an id up to char in dls from fp */ |
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ID *idp, |
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char *dls, |
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register FILE *fp |
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) |
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{ |
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char dset[256/8]; |
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char buf[MAXSTR]; |
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register int c; |
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register char *cp; |
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/* create delimiter set */ |
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for (cp = dset+sizeof(dset); cp-- > dset; ) |
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*cp = 0; |
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for (cp = dls; *cp; cp++) |
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dset[*cp>>3] |= 1<<(*cp&7); |
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/* get characters up to delimiter */ |
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cp = buf; |
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while ((c = getc(fp)) != EOF && !(dset[c>>3] & 1<<(c&7))) |
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*cp++ = c; |
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/* check for empty */ |
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if (cp == buf) { |
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if (c == EOF) |
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return(EOF); |
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idp->number = 0; |
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idp->name = NULL; |
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return(0); |
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} |
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/* truncate space at end */ |
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while (cp[-1] == ' ' || cp[-1] == '\t') |
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cp--; |
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*cp = '\0'; |
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/* skip white space at beginning */ |
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for (cp = buf; *cp && (*cp == ' ' || *cp == '\t'); cp++) |
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; |
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/* assign value */ |
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idp->number = atoi(cp); |
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idp->name = NULL; |
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/* check for ghost string */ |
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if (!*cp) |
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return(0); |
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/* check for name */ |
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if (idp->number == 0 && *cp != '0') |
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idp->name = savestr(cp); |
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return(0); |
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} |
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|
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|
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extern int |
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findid( /* find (or insert) id in list */ |
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register IDLIST *idl, |
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ID *idp, |
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int insert |
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) |
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{ |
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int upper, lower; |
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register int cm, i; |
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/* binary search */ |
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lower = 0; |
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upper = cm = idl->nids; |
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while ((i = (lower + upper) >> 1) != cm) { |
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cm = idcmp(idp, &idl->id[i]); |
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if (cm > 0) |
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lower = i; |
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else if (cm < 0) |
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upper = i; |
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else |
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return(i); |
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cm = i; |
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} |
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if (!insert) |
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return(-1); |
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if (idl->nids == 0) { /* create new list */ |
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idl->id = (ID *)malloc(sizeof(ID)); |
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if (idl->id == NULL) |
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goto memerr; |
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} else { /* grow old list */ |
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idl->id = (ID *)realloc((void *)idl->id,(idl->nids+1)*sizeof(ID)); |
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if (idl->id == NULL) |
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goto memerr; |
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for (i = idl->nids; i > upper; i--) { |
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idl->id[i].number = idl->id[i-1].number; |
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idl->id[i].name = idl->id[i-1].name; |
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} |
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} |
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idl->nids++; /* insert new element */ |
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idl->id[i].number = idp->number; |
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if (idp->name == NULL) |
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idl->id[i].name = NULL; |
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else |
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idl->id[i].name = savestr(idp->name); |
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return(i); |
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memerr: |
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eputs("Out of memory in findid\n"); |
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quit(1); |
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return -1; /* pro forma return */ |
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} |
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|
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|
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static int |
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idcmp( /* compare two identifiers */ |
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register ID *id1, |
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register ID *id2 |
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) |
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{ |
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/* names are greater than numbers */ |
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if (id1->name == NULL) |
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if (id2->name == NULL) |
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return(id1->number - id2->number); |
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else |
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return(-1); |
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else |
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if (id2->name == NULL) |
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return(1); |
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else |
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return(strcmp(id1->name, id2->name)); |
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} |
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|
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|
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extern void |
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write_quals( /* write out qualifier lists */ |
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QLIST *qlp, |
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IDLIST idl[], |
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FILE *fp |
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) |
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{ |
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int i; |
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|
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for (i = 0; i < qlp->nquals; i++) |
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if (idl[i].nids > 0) { |
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fprintf(fp, "qualifier %s begin\n", qlp->qual[i]); |
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fputidlist(&idl[i], fp); |
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fprintf(fp, "end\n"); |
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} |
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} |
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|
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|
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static void |
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fputidlist( /* put id list out to fp */ |
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IDLIST *qp, |
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FILE *fp |
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) |
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{ |
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int fi; |
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register int i; |
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/* print numbers/ranges */ |
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fi = 0; |
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for (i = 0; i < qp->nids && qp->id[i].name == NULL; i++) |
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if (i > 0 && qp->id[i].number > qp->id[i-1].number+1) { |
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if (i > fi+1) |
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fprintf(fp, "[%d:%d]\n", qp->id[fi].number, |
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qp->id[i-1].number); |
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else |
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fprintf(fp, "%d\n", qp->id[fi].number); |
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fi = i; |
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} |
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if (i-1 > fi) |
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fprintf(fp, "[%d:%d]\n", qp->id[fi].number, |
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qp->id[i-1].number); |
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else if (i > 0) |
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fprintf(fp, "%d\n", qp->id[fi].number); |
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for ( ; i < qp->nids; i++) |
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fprintf(fp, "\"%s\"\n", qp->id[i].name); |
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} |
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|
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|
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RULEHD * |
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getmapping( /* read in mapping file */ |
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char *file, |
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QLIST *qlp |
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) |
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{ |
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char *err; |
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register int c; |
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RULEHD *mp = NULL; |
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int nrules = 0; |
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register RULEHD *rp; |
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register int qt; |
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char buf[MAXSTR]; |
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FILE *fp; |
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|
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if ((fp = fopen(file, "r")) == NULL) { |
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eputs(file); |
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eputs(": cannot open\n"); |
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quit(1); |
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} |
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/* get each rule */ |
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while (fscanf(fp, " %[^ ;\n]", buf) == 1) { |
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if (buf[0] == '#') { /* comment */ |
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while ((c = getc(fp)) != EOF && c != '\n') |
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; |
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continue; |
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} |
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rp = (RULEHD *)calloc(1, rulsiz(qlp->nquals)); |
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if (rp == NULL) |
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goto memerr; |
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rp->mnam = savestr(buf); |
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for ( ; ; ) { /* get conditions */ |
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while ((c = getc(fp)) != '(') |
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if (c == ';' || c == EOF) |
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goto endloop; |
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if (fscanf(fp, " %s ", buf) != 1) { |
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err = "missing variable"; |
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goto fmterr; |
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} |
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if ((qt = qtype(buf, qlp)) == -1) { |
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err = "unknown variable"; |
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goto fmterr; |
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} |
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if (rp->qflg & FL(qt)) { |
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err = "variable repeated"; |
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goto fmterr; |
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} |
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rp->qflg |= FL(qt); |
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c = getc(fp); |
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switch (c) { |
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case '"': /* id name */ |
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if (fscanf(fp, "%[^\"]\" )", buf) != 1) { |
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err = "bad string value"; |
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goto fmterr; |
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} |
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idm(rp)[qt].nam = savestr(buf); |
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break; |
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case '[': /* id range */ |
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if (fscanf(fp, "%d : %d ] )", &idm(rp)[qt].min, |
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&idm(rp)[qt].max) != 2) { |
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err = "bad range value"; |
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goto fmterr; |
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} |
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if (idm(rp)[qt].min > idm(rp)[qt].max) { |
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err = "reverse range value"; |
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goto fmterr; |
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} |
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break; |
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default: /* id number? */ |
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if ((c < '0' || c > '9') && c != '-') { |
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err = "unrecognizable value"; |
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goto fmterr; |
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} |
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ungetc(c, fp); |
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if (fscanf(fp, "%d )", &idm(rp)[qt].min) != 1) { |
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err = "bad number id"; |
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goto fmterr; |
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} |
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idm(rp)[qt].max = idm(rp)[qt].min; |
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break; |
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} |
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} |
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endloop: |
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rp->next = mp; |
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mp = rp; |
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nrules++; |
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} |
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fclose(fp); |
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return(mp); |
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fmterr: |
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sprintf(buf, "%s: %s for rule %d\n", file, err, nrules+1); |
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eputs(buf); |
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quit(1); |
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memerr: |
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eputs("Out of memory in getmapping\n"); |
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quit(1); |
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return NULL; /* pro forma return */ |
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} |
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|
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|
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static int |
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qtype( /* return number for qualifier name */ |
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char *qnm, |
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register QLIST *qlp |
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) |
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{ |
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register int i; |
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|
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for (i = 0; i < qlp->nquals; i++) |
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if (!strcmp(qnm, qlp->qual[i])) |
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return(i); |
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return(-1); |
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} |
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|
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|
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extern int |
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matchid( /* see if we match an id */ |
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register ID *it, |
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register IDMATCH *im |
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) |
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{ |
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if (it->name == NULL) { |
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if (im->nam != NULL) |
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return(0); |
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return(it->number >= im->min && it->number <= im->max); |
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} |
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if (im->nam == NULL) |
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return(0); |
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return(!strcmp(it->name, im->nam)); |
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} |
