A data structure that stores a set of strings. More...

#include "prism/defines.h"
#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

Include dependency graph for pm_constant_pool.h:

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Data Structures
struct	pm_constant_id_list_t
	A list of constant IDs. More...

struct	pm_constant_pool_bucket_t
	A bucket in the hash map. More...

struct	pm_constant_t
	A constant in the pool which effectively stores a string. More...

struct	pm_constant_pool_t
	The overall constant pool, which stores constants found while parsing. More...

Macros
#define	PM_CONSTANT_ID_UNSET 0
	When we allocate constants into the pool, we reserve 0 to mean that the slot is not yet filled.

Typedefs
typedef uint32_t	pm_constant_id_t
	A constant id is a unique identifier for a constant in the constant pool.

typedef unsigned int	pm_constant_pool_bucket_type_t
	The type of bucket in the constant pool hash map.

Functions
void	pm_constant_id_list_init (pm_constant_id_list_t *list)
	Initialize a list of constant ids.

void	pm_constant_id_list_init_capacity (pm_constant_id_list_t *list, size_t capacity)
	Initialize a list of constant ids with a given capacity.

bool	pm_constant_id_list_append (pm_constant_id_list_t *list, pm_constant_id_t id)
	Append a constant id to a list of constant ids.

void	pm_constant_id_list_insert (pm_constant_id_list_t *list, size_t index, pm_constant_id_t id)
	Insert a constant id into a list of constant ids at the specified index.

bool	pm_constant_id_list_includes (pm_constant_id_list_t *list, pm_constant_id_t id)
	Checks if the current constant id list includes the given constant id.

void	pm_constant_id_list_free (pm_constant_id_list_t *list)
	Free the memory associated with a list of constant ids.

bool	pm_constant_pool_init (pm_constant_pool_t *pool, uint32_t capacity)
	Initialize a new constant pool with a given capacity.

pm_constant_t *	pm_constant_pool_id_to_constant (const pm_constant_pool_t *pool, pm_constant_id_t constant_id)
	Return a pointer to the constant indicated by the given constant id.

pm_constant_id_t	pm_constant_pool_find (const pm_constant_pool_t pool, const uint8_t start, size_t length)
	Find a constant in a constant pool.

pm_constant_id_t	pm_constant_pool_insert_shared (pm_constant_pool_t pool, const uint8_t start, size_t length)
	Insert a constant into a constant pool that is a slice of a source string.

pm_constant_id_t	pm_constant_pool_insert_owned (pm_constant_pool_t pool, uint8_t start, size_t length)
	Insert a constant into a constant pool from memory that is now owned by the constant pool.

pm_constant_id_t	pm_constant_pool_insert_constant (pm_constant_pool_t pool, const uint8_t start, size_t length)
	Insert a constant into a constant pool from memory that is constant.

void	pm_constant_pool_free (pm_constant_pool_t *pool)
	Free the memory associated with a constant pool.

Detailed Description

A data structure that stores a set of strings.

Each string is assigned a unique id, which can be used to compare strings for equality. This comparison ends up being much faster than strcmp, since it only requires a single integer comparison.

Macro Definition Documentation

◆ PM_CONSTANT_ID_UNSET

#define PM_CONSTANT_ID_UNSET 0

When we allocate constants into the pool, we reserve 0 to mean that the slot is not yet filled.

This constant is reused in other places to indicate the lack of a constant id.

Typedef Documentation

◆ pm_constant_pool_bucket_type_t

typedef unsigned int pm_constant_pool_bucket_type_t

The type of bucket in the constant pool hash map.

This determines how the bucket should be freed.

Function Documentation

◆ pm_constant_id_list_init()

void pm_constant_id_list_init ( pm_constant_id_list_t * list )

Initialize a list of constant ids.

Parameters

list	The list to initialize.

◆ pm_constant_id_list_init_capacity()

void pm_constant_id_list_init_capacity	(	pm_constant_id_list_t *	list,
		size_t	capacity
	)

Initialize a list of constant ids with a given capacity.

Parameters

list	The list to initialize.
capacity	The initial capacity of the list.

◆ pm_constant_id_list_append()

bool pm_constant_id_list_append	(	pm_constant_id_list_t *	list,
		pm_constant_id_t	id
	)

Append a constant id to a list of constant ids.

Returns false if any potential reallocations fail.

Parameters

list	The list to append to.
id	The id to append.

Returns: Whether the append succeeded.

Returns false if any potential reallocations fail.

◆ pm_constant_id_list_insert()

void pm_constant_id_list_insert	(	pm_constant_id_list_t *	list,
		size_t	index,
		pm_constant_id_t	id
	)

Insert a constant id into a list of constant ids at the specified index.

Parameters

list	The list to insert into.
index	The index at which to insert.
id	The id to insert.

◆ pm_constant_id_list_includes()

bool pm_constant_id_list_includes	(	pm_constant_id_list_t *	list,
		pm_constant_id_t	id
	)

Checks if the current constant id list includes the given constant id.

Parameters

list	The list to check.
id	The id to check for.

Returns: Whether the list includes the given id.

◆ pm_constant_id_list_free()

void pm_constant_id_list_free ( pm_constant_id_list_t * list )

Free the memory associated with a list of constant ids.

Parameters

list	The list to free.

◆ pm_constant_pool_init()

bool pm_constant_pool_init	(	pm_constant_pool_t *	pool,
		uint32_t	capacity
	)

Initialize a new constant pool with a given capacity.

Parameters

pool	The pool to initialize.
capacity	The initial capacity of the pool.

Returns: Whether the initialization succeeded.

◆ pm_constant_pool_id_to_constant()

pm_constant_t * pm_constant_pool_id_to_constant	(	const pm_constant_pool_t *	pool,
		pm_constant_id_t	constant_id
	)

Return a pointer to the constant indicated by the given constant id.

Parameters

pool	The pool to get the constant from.
constant_id	The id of the constant to get.

Returns: A pointer to the constant.

◆ pm_constant_pool_find()

pm_constant_id_t pm_constant_pool_find	(	const pm_constant_pool_t *	pool,
		const uint8_t *	start,
		size_t	length
	)

Find a constant in a constant pool.

Returns the id of the constant, or 0 if the constant is not found.

Parameters

pool	The pool to find the constant in.
start	A pointer to the start of the constant.
length	The length of the constant.

Returns: The id of the constant.

Returns the id of the constant, or 0 if the constant is not found.

◆ pm_constant_pool_insert_shared()

pm_constant_id_t pm_constant_pool_insert_shared	(	pm_constant_pool_t *	pool,
		const uint8_t *	start,
		size_t	length
	)

Insert a constant into a constant pool that is a slice of a source string.

Returns the id of the constant, or 0 if any potential calls to resize fail.

Parameters

pool	The pool to insert the constant into.
start	A pointer to the start of the constant.
length	The length of the constant.

Returns: The id of the constant.

Insert a constant into a constant pool that is a slice of a source string.

Returns the id of the constant, or PM_CONSTANT_ID_UNSET if any potential calls to resize fail.

◆ pm_constant_pool_insert_owned()

pm_constant_id_t pm_constant_pool_insert_owned	(	pm_constant_pool_t *	pool,
		uint8_t *	start,
		size_t	length
	)

Insert a constant into a constant pool from memory that is now owned by the constant pool.

Returns the id of the constant, or 0 if any potential calls to resize fail.

Parameters

pool	The pool to insert the constant into.
start	A pointer to the start of the constant.
length	The length of the constant.

Returns: The id of the constant.

Returns the id of the constant, or PM_CONSTANT_ID_UNSET if any potential calls to resize fail.

◆ pm_constant_pool_insert_constant()

pm_constant_id_t pm_constant_pool_insert_constant	(	pm_constant_pool_t *	pool,
		const uint8_t *	start,
		size_t	length
	)

Insert a constant into a constant pool from memory that is constant.

Returns the id of the constant, or 0 if any potential calls to resize fail.

Parameters

pool	The pool to insert the constant into.
start	A pointer to the start of the constant.
length	The length of the constant.

Returns: The id of the constant.

Returns the id of the constant, or PM_CONSTANT_ID_UNSET if any potential calls to resize fail.

◆ pm_constant_pool_free()

void pm_constant_pool_free ( pm_constant_pool_t * pool )

Free the memory associated with a constant pool.

Parameters

pool	The pool to free.

Data Structures

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

◆ PM_CONSTANT_ID_UNSET

Typedef Documentation

◆ pm_constant_pool_bucket_type_t

Function Documentation

◆ pm_constant_id_list_init()

◆ pm_constant_id_list_init_capacity()

◆ pm_constant_id_list_append()

◆ pm_constant_id_list_insert()

◆ pm_constant_id_list_includes()

◆ pm_constant_id_list_free()

◆ pm_constant_pool_init()

◆ pm_constant_pool_id_to_constant()

◆ pm_constant_pool_find()

◆ pm_constant_pool_insert_shared()

◆ pm_constant_pool_insert_owned()

◆ pm_constant_pool_insert_constant()

◆ pm_constant_pool_free()