SphinxBase 5prealpha
jsgf.c File Reference

This file implements the data structures for parsing JSGF grammars into Sphinx finite-state grammars. More...

#include <string.h>
#include <assert.h>
#include "sphinxbase/ckd_alloc.h"
#include "sphinxbase/strfuncs.h"
#include "sphinxbase/hash_table.h"
#include "sphinxbase/filename.h"
#include "sphinxbase/err.h"
#include "sphinxbase/jsgf.h"
#include "jsgf_internal.h"
#include "jsgf_parser.h"
#include "jsgf_scanner.h"

Go to the source code of this file.

Macros

#define NO_NODE   -1
 
#define RECURSIVE_NODE   -2
 

Functions

int yyparse (void *scanner, jsgf_t *jsgf)
 
jsgf_atom_tjsgf_atom_new (char *name, float weight)
 
int jsgf_atom_free (jsgf_atom_t *atom)
 
jsgf_tjsgf_grammar_new (jsgf_t *parent)
 Create a new JSGF grammar.
 
void jsgf_grammar_free (jsgf_t *jsgf)
 Free a JSGF grammar.
 
jsgf_atom_tjsgf_kleene_new (jsgf_t *jsgf, jsgf_atom_t *atom, int plus)
 
jsgf_rule_tjsgf_optional_new (jsgf_t *jsgf, jsgf_rhs_t *exp)
 
void jsgf_add_link (jsgf_t *grammar, jsgf_atom_t *atom, int from, int to)
 
char const * jsgf_grammar_name (jsgf_t *jsgf)
 Get the grammar name from the file.
 
jsgf_rule_iter_tjsgf_rule_iter (jsgf_t *grammar)
 Get an iterator over all rules in a grammar.
 
jsgf_rule_tjsgf_get_rule (jsgf_t *grammar, char const *name)
 Get a rule by name from a grammar.
 
jsgf_rule_tjsgf_get_public_rule (jsgf_t *grammar)
 Returns the first public rule of the grammar.
 
char const * jsgf_rule_name (jsgf_rule_t *rule)
 Get the rule name from a rule.
 
int jsgf_rule_public (jsgf_rule_t *rule)
 Test if a rule is public or not.
 
fsg_model_tjsgf_build_fsg (jsgf_t *grammar, jsgf_rule_t *rule, logmath_t *lmath, float32 lw)
 Build a Sphinx FSG object from a JSGF rule.
 
fsg_model_tjsgf_build_fsg_raw (jsgf_t *grammar, jsgf_rule_t *rule, logmath_t *lmath, float32 lw)
 Build a Sphinx FSG object from a JSGF rule.
 
fsg_model_tjsgf_read_file (const char *file, logmath_t *lmath, float32 lw)
 Read JSGF from file and return FSG object from it.
 
fsg_model_tjsgf_read_string (const char *string, logmath_t *lmath, float32 lw)
 Read JSGF from string and return FSG object from it.
 
int jsgf_write_fsg (jsgf_t *grammar, jsgf_rule_t *rule, FILE *outfh)
 Convert a JSGF rule to Sphinx FSG text form.
 
jsgf_rule_tjsgf_define_rule (jsgf_t *jsgf, char *name, jsgf_rhs_t *rhs, int is_public)
 
jsgf_rule_tjsgf_rule_retain (jsgf_rule_t *rule)
 
int jsgf_rule_free (jsgf_rule_t *rule)
 
jsgf_rule_tjsgf_import_rule (jsgf_t *jsgf, char *name)
 
jsgf_tjsgf_parse_file (const char *filename, jsgf_t *parent)
 Parse a JSGF grammar from a file.
 
jsgf_tjsgf_parse_string (const char *string, jsgf_t *parent)
 Parse a JSGF grammar from a string.
 

Detailed Description

This file implements the data structures for parsing JSGF grammars into Sphinx finite-state grammars.

Definition in file jsgf.c.

Macro Definition Documentation

◆ NO_NODE

#define NO_NODE   -1

Definition at line 283 of file jsgf.c.

◆ RECURSIVE_NODE

#define RECURSIVE_NODE   -2

Definition at line 284 of file jsgf.c.

Function Documentation

◆ jsgf_add_link()

void jsgf_add_link ( jsgf_t grammar,
jsgf_atom_t atom,
int  from,
int  to 
)

Definition at line 191 of file jsgf.c.

◆ jsgf_atom_free()

int jsgf_atom_free ( jsgf_atom_t atom)

Definition at line 76 of file jsgf.c.

◆ jsgf_atom_new()

jsgf_atom_t * jsgf_atom_new ( char *  name,
float  weight 
)

Definition at line 65 of file jsgf.c.

◆ jsgf_build_fsg()

fsg_model_t * jsgf_build_fsg ( jsgf_t grammar,
jsgf_rule_t rule,
logmath_t lmath,
float32  lw 
)

Build a Sphinx FSG object from a JSGF rule.

Definition at line 585 of file jsgf.c.

Referenced by jsgf_read_file(), and jsgf_read_string().

◆ jsgf_build_fsg_raw()

fsg_model_t * jsgf_build_fsg_raw ( jsgf_t grammar,
jsgf_rule_t rule,
logmath_t lmath,
float32  lw 
)

Build a Sphinx FSG object from a JSGF rule.

This differs from jsgf_build_fsg() in that it does not do closure on epsilon transitions or any other postprocessing. For the time being this is necessary in order to write it to a file - the FSG code will be fixed soon.

Definition at line 592 of file jsgf.c.

Referenced by jsgf_write_fsg().

◆ jsgf_define_rule()

jsgf_rule_t * jsgf_define_rule ( jsgf_t jsgf,
char *  name,
jsgf_rhs_t rhs,
int  is_public 
)

Definition at line 681 of file jsgf.c.

◆ jsgf_get_public_rule()

jsgf_rule_t * jsgf_get_public_rule ( jsgf_t grammar)

Returns the first public rule of the grammar.

Definition at line 484 of file jsgf.c.

References jsgf_grammar_name(), jsgf_rule_iter(), jsgf_rule_iter_free, jsgf_rule_iter_next, jsgf_rule_iter_rule, jsgf_rule_name(), and jsgf_rule_public().

◆ jsgf_get_rule()

jsgf_rule_t * jsgf_get_rule ( jsgf_t grammar,
const char *  name 
)

Get a rule by name from a grammar.

Name should not contain brackets.

Definition at line 469 of file jsgf.c.

References ckd_free(), hash_table_lookup(), jsgf_s::rules, and string_join().

◆ jsgf_grammar_free()

◆ jsgf_grammar_name()

char const * jsgf_grammar_name ( jsgf_t jsgf)

Get the grammar name from the file.

Definition at line 216 of file jsgf.c.

References jsgf_s::name.

Referenced by jsgf_get_public_rule().

◆ jsgf_grammar_new()

jsgf_t * jsgf_grammar_new ( jsgf_t parent)

Create a new JSGF grammar.

Parameters
parentoptional parent grammar for this one (NULL, usually).
Returns
new JSGF grammar object, or NULL on failure.

Definition at line 86 of file jsgf.c.

References ckd_calloc, hash_table_new(), jsgf_s::imports, jsgf_s::parent, jsgf_s::rules, and jsgf_s::searchpath.

Referenced by jsgf_parse_file(), and jsgf_parse_string().

◆ jsgf_import_rule()

jsgf_rule_t * jsgf_import_rule ( jsgf_t jsgf,
char *  name 
)

Definition at line 759 of file jsgf.c.

◆ jsgf_kleene_new()

jsgf_atom_t * jsgf_kleene_new ( jsgf_t jsgf,
jsgf_atom_t atom,
int  plus 
)

Definition at line 157 of file jsgf.c.

◆ jsgf_optional_new()

jsgf_rule_t * jsgf_optional_new ( jsgf_t jsgf,
jsgf_rhs_t exp 
)

Definition at line 181 of file jsgf.c.

◆ jsgf_parse_file()

jsgf_t * jsgf_parse_file ( const char *  filename,
jsgf_t parent 
)

Parse a JSGF grammar from a file.

Parameters
filenamethe name of the file to parse.
parentoptional parent grammar for this one (NULL, usually).
Returns
new JSGF grammar object, or NULL on failure.

Definition at line 896 of file jsgf.c.

References E_ERROR, E_ERROR_SYSTEM, jsgf_grammar_free(), and jsgf_grammar_new().

Referenced by jsgf_read_file().

◆ jsgf_parse_string()

jsgf_t * jsgf_parse_string ( const char *  string,
jsgf_t parent 
)

Parse a JSGF grammar from a string.

Parameters
0-terminatedstring with grammar.
parentoptional parent grammar for this one (NULL, usually).
Returns
new JSGF grammar object, or NULL on failure.

Definition at line 937 of file jsgf.c.

References E_ERROR, jsgf_grammar_free(), and jsgf_grammar_new().

Referenced by jsgf_read_string().

◆ jsgf_read_file()

fsg_model_t * jsgf_read_file ( const char *  file,
logmath_t lmath,
float32  lw 
)

Read JSGF from file and return FSG object from it.

This function looks for a first public rule in jsgf and constructs JSGF from it.

Definition at line 599 of file jsgf.c.

References E_ERROR, jsgf_build_fsg(), jsgf_grammar_free(), jsgf_parse_file(), jsgf_rule_iter(), jsgf_rule_iter_free, jsgf_rule_iter_next, jsgf_rule_iter_rule, and jsgf_rule_public().

◆ jsgf_read_string()

fsg_model_t * jsgf_read_string ( const char *  string,
logmath_t lmath,
float32  lw 
)

Read JSGF from string and return FSG object from it.

This function looks for a first public rule in jsgf and constructs JSGF from it.

Definition at line 630 of file jsgf.c.

References E_ERROR, jsgf_build_fsg(), jsgf_grammar_free(), jsgf_parse_string(), jsgf_rule_iter(), jsgf_rule_iter_free, jsgf_rule_iter_next, jsgf_rule_iter_rule, and jsgf_rule_public().

◆ jsgf_rule_free()

int jsgf_rule_free ( jsgf_rule_t rule)

Definition at line 722 of file jsgf.c.

◆ jsgf_rule_iter()

jsgf_rule_iter_t * jsgf_rule_iter ( jsgf_t grammar)

Get an iterator over all rules in a grammar.

Definition at line 463 of file jsgf.c.

References hash_table_iter(), and jsgf_s::rules.

Referenced by jsgf_get_public_rule(), jsgf_read_file(), and jsgf_read_string().

◆ jsgf_rule_name()

char const * jsgf_rule_name ( jsgf_rule_t rule)

Get the rule name from a rule.

Definition at line 513 of file jsgf.c.

References jsgf_rule_s::name.

Referenced by jsgf_get_public_rule().

◆ jsgf_rule_public()

int jsgf_rule_public ( jsgf_rule_t rule)

Test if a rule is public or not.

Definition at line 519 of file jsgf.c.

References jsgf_rule_s::is_public.

Referenced by jsgf_get_public_rule(), jsgf_read_file(), and jsgf_read_string().

◆ jsgf_rule_retain()

jsgf_rule_t * jsgf_rule_retain ( jsgf_rule_t rule)

Definition at line 715 of file jsgf.c.

◆ jsgf_write_fsg()

int jsgf_write_fsg ( jsgf_t grammar,
jsgf_rule_t rule,
FILE *  outfh 
)

Convert a JSGF rule to Sphinx FSG text form.

This does a direct conversion without doing transitive closure on null transitions and so forth.

Definition at line 663 of file jsgf.c.

References jsgf_build_fsg_raw(), logmath_free(), and logmath_init().

◆ yyparse()

int yyparse ( void *  scanner,
jsgf_t jsgf 
)

Definition at line 968 of file jsgf_parser.c.