Re: parsing bibtex using gscanner

[Bernhard Schuster <schuster bernhard googlemail com>]

Show an example that works, show an example that does not work, show
expected and actual output of both. Additionally minimal demo main.c.

That is the minimum effort you should put into a mailinglist request
for help (but that is maybe just my very own opinion). Most problems
suddenly get obvious when put into a minimal example (read: by far not
all, but many)


Regards,

Bernhard

2013/2/18 Rudra Banerjee <rudra banerjee aol co uk>:
> Dear Friends,
> I am trying to parse a bibtex file using gscanner.
> The problem is that, due to many formats accepted by bibtex, it seems
> bit hard to parse it.
> What I mean is as long as the bibtex is of the form key="some value",
> then g_scanner_get_next_token can get the string.
> But it fails if it is in the format key={value}.
>
> I am attaching my code. Some help (outside using btparse/ bison )is
> needed.
> guint parse_entry (GScanner   *scanner,
>     GHashTable *table)
> {
>   int tokount;
>   /* Entry starts with @ */
>   g_scanner_get_next_token (scanner);
>   if (scanner->token != '@')
>     return G_TOKEN_ERROR;
>
>   /* Now get identifier */
>   g_scanner_get_next_token (scanner);
>   if (scanner->token != G_TOKEN_IDENTIFIER)
>     return G_TOKEN_ERROR;
>
>   g_hash_table_insert (table, g_strdup ("type"),
>       g_strdup (scanner->value.v_identifier));
>
>   /* Brace */
>   g_scanner_get_next_token (scanner);
>   if (scanner->token != G_TOKEN_LEFT_CURLY){
>     return G_TOKEN_ERROR;}
>   else
>     tokount += tokount;
>
>   /* ID */
>   g_scanner_get_next_token (scanner);
>   if (scanner->token != G_TOKEN_IDENTIFIER)
>     return G_TOKEN_ERROR;
>
>   g_hash_table_insert (table, g_strdup ("id"),
>       g_strdup (scanner->value.v_identifier));
>
>   while (TRUE)
>   {
>     char *key, *val;
>
>     g_scanner_get_next_token (scanner);
>     if (scanner->token != G_TOKEN_COMMA)
>       return G_TOKEN_ERROR;
>
>
>     g_scanner_get_next_token (scanner);
>     if (scanner->token != G_TOKEN_IDENTIFIER)
>       return G_TOKEN_ERROR;
>
>     key = g_strdup (scanner->value.v_identifier);
>
> /*    g_scanner_peek_next_token (scanner);
>     if (scanner->token == G_TOKEN_LEFT_CURLY)
>       tokount += tokount;*/
>
>     g_scanner_get_next_token (scanner);
>     if (scanner->token != '=')
>     {
>       g_free (key);
>       return G_TOKEN_ERROR;
>     }
>
>     g_scanner_get_next_token (scanner);
>     if (scanner->token != G_TOKEN_STRING)
>     {
>       g_free (key);
>       return G_TOKEN_ERROR;
>     }
>
>     val = g_strdup (scanner->value.v_string);
>     g_hash_table_insert(table, key, val);
>
>     g_scanner_peek_next_token (scanner);
>     if (scanner->next_token == G_TOKEN_RIGHT_CURLY)
>       break;
>   }
>
>   g_scanner_get_next_token (scanner);
>   return G_TOKEN_NONE;
> }
>
>
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