database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-07-27 20:41:58 +03:00
Code Activity

Add the %extra_context directive to lemon, as an alternative to %extra_argument.

Browse Source 
Use this to improve the performance of the parser.

FossilOrigin-Name: be47a6f5262a43f477700579512fe7112a0872faedcbbe5c3383d13a08af6440
This commit is contained in:
drh
2018-04-21 13:51:42 +00:00
parent f3d7bbb767
commit fb32c44e41
8 changed files with 125 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
tool/lemon.c
View File

@ -396,6 +396,7 @@ struct lemon {
struct symbol *wildcard; /* Token that matches anything */
char *name; /* Name of the generated parser */
char *arg; /* Declaration of the 3th argument to parser */
char *ctx; /* Declaration of 2nd argument to constructor */
char *tokentype; /* Type of terminal symbols in the parser stack */
char *vartype; /* The default type of non-terminal symbols */
char *start; /* Name of the start symbol for the grammar */
@ -2493,6 +2494,9 @@ to follow the previous rule.");
}else if( strcmp(x,"extra_argument")==0 ){
psp->declargslot = &(psp->gp->arg);
psp->insertLineMacro = 0;
}else if( strcmp(x,"extra_context")==0 ){
psp->declargslot = &(psp->gp->ctx);
psp->insertLineMacro = 0;
}else if( strcmp(x,"token_type")==0 ){
psp->declargslot = &(psp->gp->tokentype);
psp->insertLineMacro = 0;
@ -4198,16 +4202,36 @@ void ReportTable(
while( i>=1 && (ISALNUM(lemp->arg[i-1]) || lemp->arg[i-1]=='_') ) i--;
fprintf(out,"#define %sARG_SDECL %s;\n",name,lemp->arg); lineno++;
fprintf(out,"#define %sARG_PDECL ,%s\n",name,lemp->arg); lineno++;
fprintf(out,"#define %sARG_FETCH %s = yypParser->%s\n",
fprintf(out,"#define %sARG_PARAM ,%s\n",name,&lemp->arg[i]); lineno++;
fprintf(out,"#define %sARG_FETCH %s=yypParser->%s;\n",
name,lemp->arg,&lemp->arg[i]); lineno++;
fprintf(out,"#define %sARG_STORE yypParser->%s = %s\n",
fprintf(out,"#define %sARG_STORE yypParser->%s=%s;\n",
name,&lemp->arg[i],&lemp->arg[i]); lineno++;
}else{
fprintf(out,"#define %sARG_SDECL\n",name); lineno++;
fprintf(out,"#define %sARG_PDECL\n",name); lineno++;
fprintf(out,"#define %sARG_SDECL\n",name); lineno++;
fprintf(out,"#define %sARG_PDECL\n",name); lineno++;
fprintf(out,"#define %sARG_PARAM\n",name); lineno++;
fprintf(out,"#define %sARG_FETCH\n",name); lineno++;
fprintf(out,"#define %sARG_STORE\n",name); lineno++;
}
if( lemp->ctx && lemp->ctx[0] ){
i = lemonStrlen(lemp->ctx);
while( i>=1 && ISSPACE(lemp->ctx[i-1]) ) i--;
while( i>=1 && (ISALNUM(lemp->ctx[i-1]) || lemp->ctx[i-1]=='_') ) i--;
fprintf(out,"#define %sCTX_SDECL %s;\n",name,lemp->ctx); lineno++;
fprintf(out,"#define %sCTX_PDECL ,%s\n",name,lemp->ctx); lineno++;
fprintf(out,"#define %sCTX_PARAM ,%s\n",name,&lemp->ctx[i]); lineno++;
fprintf(out,"#define %sCTX_FETCH %s=yypParser->%s;\n",
name,lemp->ctx,&lemp->ctx[i]); lineno++;
fprintf(out,"#define %sCTX_STORE yypParser->%s=%s;\n",
name,&lemp->ctx[i],&lemp->ctx[i]); lineno++;
}else{
fprintf(out,"#define %sCTX_SDECL\n",name); lineno++;
fprintf(out,"#define %sCTX_PDECL\n",name); lineno++;
fprintf(out,"#define %sCTX_PARAM\n",name); lineno++;
fprintf(out,"#define %sCTX_FETCH\n",name); lineno++;
fprintf(out,"#define %sCTX_STORE\n",name); lineno++;
}
if( mhflag ){
fprintf(out,"#endif\n"); lineno++;
}