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/* libwapcaplet.h
*
* String internment and management tools.
*
* Copyright 2009 The NetSurf Browser Project.
* Daniel Silverstone <dsilvers@netsurf-browser.org>
*/
#ifndef libwapcaplet_h_
#define libwapcaplet_h_
#include <sys/types.h>
#include <stdbool.h>
/**
* Memory allocator type
*/
typedef void *(*lwc_allocator_fn)(void *ptr, size_t size, void *pw);
/**
* A string internment context.
*/
typedef struct lwc_context_s lwc_context;
/**
* An interned string.
*/
typedef struct lwc_string_s lwc_string;
/**
* Error codes which libwapcaplet might return.
*/
typedef enum lwc_error_e {
lwc_error_ok = 0,
lwc_error_oom = 1,
lwc_error_range = 2,
} lwc_error;
/**
* Create an internment context.
*
* This creates an internment context with a weak ref of one.
*
* You should reference the context with lwc_context_ref to convert
* that to a strong reference when you decide where to store it.
*/
extern lwc_error lwc_create_context(lwc_allocator_fn alloc, void *pw,
lwc_context **ret);
/**
* Increment the reference count for an internment context.
*/
extern lwc_context *lwc_context_ref(lwc_context *ctx);
/**
* Decrement the reference count for an internment context.
*
* @note If the reference count reaches zero, the context will be freed.
*/
extern void lwc_context_unref(lwc_context *ctx);
/**
* Intern a string.
*
* If the string was already present, its reference count is incremented.
*/
extern lwc_error lwc_context_intern(lwc_context *ctx,
const char *s, size_t slen,
lwc_string **ret);
/**
* Intern a substring.
*/
extern lwc_error lwc_context_intern_substring(lwc_context *ctx,
lwc_string *str,
size_t ssoffset, size_t sslen,
lwc_string **ret);
/**
* Increment the reference count on an lwc_string.
*
* Use this if copying the string and intending both sides to retain
* ownership.
*/
extern lwc_string *lwc_context_string_ref(lwc_context *ctx, lwc_string *str);
/**
* Release a reference on an lwc_string.
*
* If the reference count reaches zero then the string will be freed.
*/
extern void lwc_context_string_unref(lwc_context *ctx, lwc_string *str);
/**
* Check if two interned strings are equal.
*
* @note The strings must be from the same intern context and that
* must be the context passed in.
*/
#define lwc_context_string_isequal(ctx, str1, str2, ret) \
(*ret = (str1 == str2)), lwc_error_ok
/**
* Check if two interned strings are case-insensitively equal.
*
* @note The strings must be from the same intern context and that
* must be the context passed in.
*/
extern lwc_error lwc_context_string_caseless_isequal(lwc_context *ctx,
lwc_string *str1,
lwc_string *str2,
bool *ret);
#endif /* libwapcaplet_h_ */
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