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Lemon updates: (1) include the #defines for all tokens in the generated C

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file, so that the C-file can be stand-alone.  (2) If the grammar begins with
a %include {...} directive on line one, make that directive the header for
the generated C file.  (3) Enhance the lemon.html documentation.

FossilOrigin-Name: 84d54eb35716174195ee7e5ac846f47308e5dbb0056e8ff568daa133860bab74
This commit is contained in:
drh
2020-09-01 11:20:03 +00:00
parent fa17e134b2
commit 60c71b02ca
6 changed files with 270 additions and 76 deletions
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50
tool/lemon.c
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@ -2638,8 +2638,10 @@ static void parseonetoken(struct pstate *psp)
}
nOld = lemonStrlen(zOld);
n = nOld + nNew + 20;
addLineMacro = !psp->gp->nolinenosflag && psp->insertLineMacro &&
(psp->decllinenoslot==0 || psp->decllinenoslot[0]!=0);
addLineMacro = !psp->gp->nolinenosflag
&& psp->insertLineMacro
&& psp->tokenlineno>1
&& (psp->decllinenoslot==0 || psp->decllinenoslot[0]!=0);
if( addLineMacro ){
for(z=psp->filename, nBack=0; *z; z++){
if( *z=='\\' ) nBack++;
@ -3617,6 +3619,16 @@ PRIVATE void tplt_xfer(char *name, FILE *in, FILE *out, int *lineno)
}
}
/* Skip forward past the header of the template file to the first "%%"
*/
PRIVATE void tplt_skip_header(FILE *in, int *lineno)
{
char line[LINESIZE];
while( fgets(line,LINESIZE,in) && (line[0]!='%' || line[1]!='%') ){
(*lineno)++;
}
}
/* The next function finds the template file and opens it, returning
** a pointer to the opened file. */
PRIVATE FILE *tplt_open(struct lemon *lemp)
@ -4287,6 +4299,7 @@ void ReportTable(
int mnTknOfst, mxTknOfst;
int mnNtOfst, mxNtOfst;
struct axset *ax;
char *prefix;
lemp->minShiftReduce = lemp->nstate;
lemp->errAction = lemp->minShiftReduce + lemp->nrule;
@ -4375,7 +4388,22 @@ void ReportTable(
fprintf(sql, "COMMIT;\n");
}
lineno = 1;
tplt_xfer(lemp->name,in,out,&lineno);
/* The first %include directive begins with a C-language comment,
** then skip over the header comment of the template file
*/
if( lemp->include==0 ) lemp->include = "";
for(i=0; ISSPACE(lemp->include[i]); i++){
if( lemp->include[i]=='\n' ){
lemp->include += i+1;
i = -1;
}
}
if( lemp->include[0]=='/' ){
tplt_skip_header(in,&lineno);
}else{
tplt_xfer(lemp->name,in,out,&lineno);
}
/* Generate the include code, if any */
tplt_print(out,lemp,lemp->include,&lineno);
@ -4387,17 +4415,19 @@ void ReportTable(
tplt_xfer(lemp->name,in,out,&lineno);
/* Generate #defines for all tokens */
if( lemp->tokenprefix ) prefix = lemp->tokenprefix;
else prefix = "";
if( mhflag ){
const char *prefix;
fprintf(out,"#if INTERFACE\n"); lineno++;
if( lemp->tokenprefix ) prefix = lemp->tokenprefix;
else prefix = "";
for(i=1; i<lemp->nterminal; i++){
fprintf(out,"#define %s%-30s %2d\n",prefix,lemp->symbols[i]->name,i);
lineno++;
}
fprintf(out,"#endif\n"); lineno++;
}else{
fprintf(out,"#ifndef %s%s\n", prefix, lemp->symbols[1]->name);
}
for(i=1; i<lemp->nterminal; i++){
fprintf(out,"#define %s%-30s %2d\n",prefix,lemp->symbols[i]->name,i);
lineno++;
}
fprintf(out,"#endif\n"); lineno++;
tplt_xfer(lemp->name,in,out,&lineno);
/* Generate the defines */