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Lemon update 2015-09-07 02:23:02 on branch trunk
- Improved "Parser Statistics" output (the -s option) for the Lemon parser generator. (user: drh)
This commit is contained in:
Randy Heit
parent
23f69b6fbc
commit
00de97aca2
1 changed files with 55 additions and 22 deletions
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@ -289,7 +289,8 @@ struct lemon {
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char *outname; /* Name of the current output file */
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char *tokenprefix; /* A prefix added to token names in the .h file */
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int nconflict; /* Number of parsing conflicts */
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int tablesize; /* Size of the parse tables */
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int nactiontab; /* Number of entries in the yy_action[] table */
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int tablesize; /* Total table size of all tables in bytes */
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int basisflag; /* Print only basis configurations */
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int has_fallback; /* True if any %fallback is seen in the grammar */
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int nolinenosflag; /* True if #line statements should not be printed */
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@ -1399,6 +1400,18 @@ static void handle_T_option(char *z){
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strcpy(user_templatename, z);
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}
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/* forward reference */
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static const char *minimum_size_type(int lwr, int upr, int *pnByte);
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/* Print a single line of the "Parser Stats" output
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*/
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static void stats_line(const char *zLabel, int iValue){
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int nLabel = lemonStrlen(zLabel);
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printf(" %s%.*s %5d\n", zLabel,
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35-nLabel, "................................",
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iValue);
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}
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/* The main program. Parse the command line and do it... */
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int main(int argc, char **argv)
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{
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@ -1529,11 +1542,15 @@ int main(int argc, char **argv)
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if( !mhflag ) ReportHeader(&lem);
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}
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if( statistics ){
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printf("Parser statistics: %d terminals, %d nonterminals, %d rules\n",
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lem.nterminal, lem.nsymbol - lem.nterminal, lem.nrule);
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printf(" %d states, %d parser table entries,"
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" %d conflicts\n",
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lem.nstate, lem.tablesize, lem.nconflict);
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printf("Parser statistics:\n");
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stats_line("terminal symbols", lem.nterminal);
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stats_line("non-terminal symbols", lem.nsymbol - lem.nterminal);
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stats_line("total symbols", lem.nsymbol);
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stats_line("rules", lem.nrule);
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stats_line("states", lem.nstate);
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stats_line("conflicts", lem.nconflict);
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stats_line("action table entries", lem.nactiontab);
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stats_line("total table size (bytes)", lem.tablesize);
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}
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if( lem.nconflict ){
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fprintf(stderr,"%d parsing conflicts.\n",lem.nconflict);
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@ -3595,24 +3612,32 @@ void print_stack_union(
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/*
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** Return the name of a C datatype able to represent values between
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** lwr and upr, inclusive.
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** lwr and upr, inclusive. If pnByte!=NULL then also write the sizeof
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** for that type (1, 2, or 4) into *pnByte.
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*/
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static const char *minimum_size_type(int lwr, int upr){
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static const char *minimum_size_type(int lwr, int upr, int *pnByte){
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const char *zType = "int";
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int nByte = 4;
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if( lwr>=0 ){
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if( upr<=255 ){
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return "unsigned char";
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zType = "unsigned char";
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nByte = 1;
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}else if( upr<65535 ){
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return "unsigned short int";
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zType = "unsigned short int";
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nByte = 2;
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}else{
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return "unsigned int";
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zType = "unsigned int";
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nByte = 4;
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}
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}else if( lwr>=-127 && upr<=127 ){
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return "signed char";
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zType = "signed char";
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nByte = 1;
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}else if( lwr>=-32767 && upr<32767 ){
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return "short";
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}else{
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return "int";
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zType = "short";
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nByte = 2;
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}
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if( pnByte ) *pnByte = nByte;
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return zType;
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}
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/*
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@ -3676,7 +3701,9 @@ void ReportTable(
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struct action *ap;
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struct rule *rp;
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struct acttab *pActtab;
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int i, j, k, n;
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int i, j, k, n, sz;
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int szActionType; /* sizeof(YYACTIONTYPE) */
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int szCodeType; /* sizeof(YYCODETYPE) */
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const char *name;
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int mnTknOfst, mxTknOfst;
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int mnNtOfst, mxNtOfst;
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@ -3717,10 +3744,10 @@ void ReportTable(
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/* Generate the defines */
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fprintf(out,"#define YYCODETYPE %s\n",
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minimum_size_type(0, lemp->nsymbol+1)); lineno++;
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minimum_size_type(0, lemp->nsymbol+1, &szCodeType)); lineno++;
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fprintf(out,"#define YYNOCODE %d\n",lemp->nsymbol+1); lineno++;
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fprintf(out,"#define YYACTIONTYPE %s\n",
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minimum_size_type(0, lemp->nstate+lemp->nrule+5)); lineno++;
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minimum_size_type(0, lemp->nstate+lemp->nrule+5, &szActionType)); lineno++;
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if( lemp->wildcard ){
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fprintf(out,"#define YYWILDCARD %d\n",
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lemp->wildcard->index); lineno++;
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@ -3835,7 +3862,8 @@ void ReportTable(
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free(ax);
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/* Output the yy_action table */
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n = acttab_size(pActtab);
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lemp->nactiontab = n = acttab_size(pActtab);
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lemp->tablesize += n*szActionType;
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fprintf(out,"#define YY_ACTTAB_COUNT (%d)\n", n); lineno++;
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fprintf(out,"static const YYACTIONTYPE yy_action[] = {\n"); lineno++;
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for(i=j=0; i<n; i++){
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@ -3853,6 +3881,7 @@ void ReportTable(
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fprintf(out, "};\n"); lineno++;
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/* Output the yy_lookahead table */
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lemp->tablesize += n*szCodeType;
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fprintf(out,"static const YYCODETYPE yy_lookahead[] = {\n"); lineno++;
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for(i=j=0; i<n; i++){
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int la = acttab_yylookahead(pActtab, i);
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@ -3876,7 +3905,8 @@ void ReportTable(
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fprintf(out, "#define YY_SHIFT_MIN (%d)\n", mnTknOfst); lineno++;
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fprintf(out, "#define YY_SHIFT_MAX (%d)\n", mxTknOfst); lineno++;
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fprintf(out, "static const %s yy_shift_ofst[] = {\n",
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minimum_size_type(mnTknOfst-1, mxTknOfst)); lineno++;
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minimum_size_type(mnTknOfst-1, mxTknOfst, &sz)); lineno++;
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lemp->tablesize += n*sz;
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for(i=j=0; i<n; i++){
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int ofst;
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stp = lemp->sorted[i];
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@ -3901,7 +3931,8 @@ void ReportTable(
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fprintf(out, "#define YY_REDUCE_MIN (%d)\n", mnNtOfst); lineno++;
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fprintf(out, "#define YY_REDUCE_MAX (%d)\n", mxNtOfst); lineno++;
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fprintf(out, "static const %s yy_reduce_ofst[] = {\n",
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minimum_size_type(mnNtOfst-1, mxNtOfst)); lineno++;
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minimum_size_type(mnNtOfst-1, mxNtOfst, &sz)); lineno++;
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lemp->tablesize += n*sz;
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for(i=j=0; i<n; i++){
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int ofst;
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stp = lemp->sorted[i];
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@ -3921,6 +3952,7 @@ void ReportTable(
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/* Output the default action table */
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fprintf(out, "static const YYACTIONTYPE yy_default[] = {\n"); lineno++;
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n = lemp->nstate;
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lemp->tablesize += n*szActionType;
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for(i=j=0; i<n; i++){
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stp = lemp->sorted[i];
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if( j==0 ) fprintf(out," /* %5d */ ", i);
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@ -3939,7 +3971,8 @@ void ReportTable(
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*/
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if( lemp->has_fallback ){
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int mx = lemp->nterminal - 1;
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while( mx>0 && lemp->symbols[mx]->fallback==0 ){ mx--; }
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while( mx>0 && lemp->symbols[mx]->fallback==0 ){ mx--; }
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lemp->tablesize += (mx+1)*szCodeType;
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for(i=0; i<=mx; i++){
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struct symbol *p = lemp->symbols[i];
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if( p->fallback==0 ){
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