Map char* to double. More...

#include "strdblmap.h"
#include "error.h"
#include "binary.h"
#include "misc.h"
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <sys/errno.h>

Data Structures
struct	El
	A single key-value pair, with a pointer to the next one. More...

struct	StrDblMap
	The hash table. More...

Functions
static int	resize (StrDblMap *self)
	Double the size of the hash map and rehash.

static El *	El_new (const char *key, double value)
	Construct a new element with given key and value.

static void	El_free (El *e)
	Destroy a linked list of El objects.

static El *	El_insert (El self, const char key, double value, int *status)
	Insert a new key/value pair into the linked list. More...

StrDblMap *	StrDblMap_new (int dim)
	Constructor.

void	StrDblMap_free (StrDblMap *self)
	Destructor.

double	StrDblMap_get (StrDblMap self, const char key, int *status)
	Get the value associated with key. More...

int	StrDblMap_hasKey (StrDblMap self, const char key)
	Return 1 if key is present in map; 0 otherwise.

int	StrDblMap_insert (StrDblMap self, const char key, double value)
	Insert a value into the table, resizing if necessary. More...

unsigned long	StrDblMap_size (StrDblMap *self)
	Return the number of elements.

int	StrDblMap_keys (StrDblMap self, unsigned size, char keys[size])
	Put keys into array "keys". More...

Detailed Description

Map char* to double.

Author: Alan R. Rogers

Copyright: Copyright (c) 2023, Alan R. Rogers roger.nosp@m.s@an.nosp@m.thro..nosp@m.utah.nosp@m..edu. This file is released under the Internet Systems Consortium License, which can be found in file "LICENSE".

Function Documentation

◆ El_insert()

static El * El_insert	(	El *	self,
		const char *	key,
		double	value,
		int *	status
	)

static

Insert a new key/value pair into the linked list.

Usage:

El *list=NULL;
int status;
list = El_insert(list, key, value, &status);
if(status != 0)
    printf("Error: key is already in list\n");

Parameters

	self	current element of list
[in]	key,a	pointer
[in]	value,another	pointer
[out]	status	pointer to int, which will be set to 0 on success or 1 if value is already in list.

Returns: pointer to self or to a newly-allocated El.

References El_insert(), El_new(), and El::next.

Referenced by El_insert(), and StrDblMap_insert().

◆ StrDblMap_get()

double StrDblMap_get	(	StrDblMap *	self,
		const char *	key,
		int *	status
	)

Get the value associated with key.

On success, *status is set equal to 0 and the function returns the value associated with the key. If the key is not found, *status is set equal to 1, and the function returns 0.0.

References El::next, and strhash().

◆ StrDblMap_insert()

int StrDblMap_insert	(	StrDblMap *	self,
		const char *	key,
		double	value
	)

Insert a value into the table, resizing if necessary.

Returns: 0 on success; 1 if pointers is already in table; ENOMEM if the function attempts unsuccessfully to resize the hash table.

References El_insert(), resize(), and strhash().

◆ StrDblMap_keys()

int StrDblMap_keys	(	StrDblMap *	self,
		unsigned	size,
		char *	keys[size]
	)

Put keys into array "keys".

If the array isn't large enough, return BUFFER_OVERFLOW. Otherwise return 0. Allocates memory for each key, so each key should be freed by the calling function.

References El::next.