fcache.c
资源名称:pccts133.zip [点击查看]
上传用户:itx_2006
上传日期:2007-01-06
资源大小:493k
文件大小:3k
源码类别:
编译器/解释器
开发平台:
Others
- /*
- * fcache.c
- *
- * SOFTWARE RIGHTS
- *
- * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
- * Set (PCCTS) -- PCCTS is in the public domain. An individual or
- * company may do whatever they wish with source code distributed with
- * PCCTS or the code generated by PCCTS, including the incorporation of
- * PCCTS, or its output, into commerical software.
- *
- * We encourage users to develop software with PCCTS. However, we do ask
- * that credit is given to us for developing PCCTS. By "credit",
- * we mean that if you incorporate our source code into one of your
- * programs (commercial product, research project, or otherwise) that you
- * acknowledge this fact somewhere in the documentation, research report,
- * etc... If you like PCCTS and have developed a nice tool with the
- * output, please mention that you developed it using PCCTS. In
- * addition, we ask that this header remain intact in our source code.
- * As long as these guidelines are kept, we expect to continue enhancing
- * this system and expect to make other tools available as they are
- * completed.
- *
- * ANTLR 1.33MR10
- *
- */
- #include <stdio.h>
- #ifdef __cplusplus
- #ifndef __STDC__
- #define __STDC__
- #endif
- #endif
- #include <ctype.h>
- #include "set.h"
- #include "syn.h"
- #include "hash.h"
- #include "generic.h"
- #ifdef __STDC__
- CacheEntry *dumpFcache1(char *prev)
- #else
- CacheEntry *dumpFcache1(prev)
- char *prev;
- #endif
- {
- Entry **table=Fcache;
- int low=0;
- int hi=0;
- CacheEntry *least=NULL;
- Entry **p;
- for (p=table; p<&(table[HashTableSize]); p++) {
- CacheEntry *q =(CacheEntry *) *p;
- if ( q != NULL && low==0 ) low = p-table;
- while ( q != NULL ) {
- if (strcmp(q->str,prev) > 0) {
- if (least == NULL) {
- least=q;
- } else {
- if (strcmp(q->str,least->str) < 0) {
- least=q;
- };
- };
- };
- q = q->next;
- };
- if ( *p != NULL ) hi = p-table;
- }
- return least;
- }
- #ifdef __STDC__
- void reportFcache(CacheEntry *q)
- #else
- void reportFcache(q)
- CacheEntry *q;
- #endif
- {
- char *qstr;
- fprintf(stdout,"nrule ");
- for (qstr=q->str; *qstr != '*' ; qstr++) {
- fprintf(stdout,"%c",*qstr);
- };
- qstr++;
- if (*qstr == 'i') fprintf(stdout," First[");
- if (*qstr == 'o') fprintf(stdout," Follow[");
- qstr++;
- fprintf(stdout,"%s]",qstr);
- if (q->incomplete) fprintf(stdout," *** incomplete ***");
- fprintf(stdout,"n");
- MR_dumpTokenSet(stdout,1,q->fset);
- }
- void DumpFcache() {
- char *prev="";
- int n=0;
- CacheEntry *next;
- fprintf(stdout,"nnDump of First/Follow Cachen");
- while (1) {
- next=dumpFcache1(prev);
- if (next == NULL) break;
- reportFcache(next);
- ++n;
- prev=next->str;
- };
- fprintf(stdout,"nEnd dump of First/Follow Cachen");
- }