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| From | Rudra Banerjee <bnrj.rudra@gmail.com> |
| Newsgroups | comp.compilers |
| Subject | Re: parsing bibtex file with flex/bison |
| Date | Sun, 17 Mar 2013 00:18:50 +0000 |
| Organization | A noiseless patient Spider |
| Lines | 96 |
| Sender | johnl@iecc.com |
| Approved | comp.compilers@iecc.com |
| Message-ID | <13-03-013@comp.compilers> (permalink) |
| References | <13-03-003@comp.compilers> <13-03-004@comp.compilers> <13-03-006@comp.compilers> |
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| NNTP-Posting-Date | Tue, 19 Mar 2013 13:56:31 +0000 (UTC) |
| Keywords | parse, question, comment |
| Posted-Date | 19 Mar 2013 09:56:31 EDT |
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| Xref | csiph.com comp.compilers:874 |
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I have managed considerable progress in parsing the bib file, but the
next step is quite tough for my present level of understanding.
I have created bison and flex code, that parses the bib file correctly
(some exceptions may still be there):
$cat bib.y
%{
#include <stdio.h>
%}
// Symbols.
%union
{
char *sval;
};
%token <sval> VALUE
%token <sval> KEY
%token OBRACE
%token EBRACE
%token QUOTE
%token SEMICOLON
%start Input
%%
Input:
/* empty */
| Input Entry ; /* input is zero or more entires */
Entry:
'@' KEY '{' KEY ','{ printf("===========\n%s : %s\n",$2, $4); }
KeyVals '}'
;
KeyVals:
/* empty */
| KeyVals KeyVal ; /* zero or more keyvals */
KeyVal:
KEY '=' VALUE ',' { printf("%s : %s\n",$1, $3); };
%%
int yyerror(char *s) {
printf("yyerror : %s\n",s);
}
int main(void) {
yyparse();
}
and
$cat bib.l
%{
#include "bib.tab.h"
%}
%%
[A-Za-z][A-Za-z0-9]* { yylval.sval = strdup(yytext); return KEY; }
\"([^\"]|\\.)*\"|\{([^\"]|\\.)*\} { yylval.sval = strdup(yytext);
return VALUE; }
[ \t\n] ; /* ignore whitespace */
[{}@=,] { return *yytext; }
. { fprintf(stderr, "Unrecognized character %c
in input\n", *yytext); }
%%
I want to have those values in a container. For last few days, I read
the vast documentation of glib and came out with hash container as most
suitable for my case.
Below is a basic hash code, where it have the hashes correctly, once the
values are put in the array keys and vals.
#include <glib.h>
#define slen 1024
int main(gint argc, gchar** argv)
{
char *keys[] = {"id", "type", "author", "year",NULL};
char *vals[] = {"one", "Book", "RB", "2013", NULL};
gint i;
GHashTable* table = g_hash_table_new(g_str_hash, g_str_equal);
GHashTableIter iter;
g_hash_table_iter_init (&iter, table);
for (i= 0; i<=3; i++)
{
g_hash_table_insert(table, keys[i],vals[i]);
g_printf("%d=>%s:%s
\n",i,keys[i],g_hash_table_lookup(table,keys[i]));
}
}
The problem is, how I integrate this two code, i.e. put the $1, $3 of "
KEY '=' VALUE ',' { printf("%s : %s\n",$1, $3); };" in the hash table.
Any kind help is appreciated.
[If you want to put it in the hash table, you do so, something like
g_hash_table_insert(table, $1, $3)
-John]
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parsing bibtex file with flex/bison bnrj.rudra@gmail.com - 2013-03-04 15:48 -0800
Re: parsing bibtex file with flex/bison Evangelos Drikos <drikosev@otenet.gr> - 2013-03-06 13:45 +0200
Re: parsing bibtex file with flex/bison Rudra Banerjee <bnrj.rudra@gmail.com> - 2013-03-07 11:20 +0000
Re: parsing bibtex file with flex/bison Rudra Banerjee <bnrj.rudra@gmail.com> - 2013-03-17 00:18 +0000
Re: parsing bibtex file with flex/bison Torsten Eichstädt <torsten.eichstaedt@FernUni-Hagen.de> - 2013-03-25 13:41 +0100
Re: parsing bibtex file with flex/bison glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-03-08 03:59 +0000
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