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/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FSTRING_H
#define FSTRING_H
#include "config.h"
#include "mem_pool.h"
#include <unicode/uchar.h>
/**
* Fixed strings library
* These strings are NOT null-terminated for speed
*/
typedef struct f_str_s {
gsize len;
gsize allocated;
gchar str[];
} rspamd_fstring_t;
#define RSPAMD_FSTRING_DATA(s) ((s)->str)
#define RSPAMD_FSTRING_LEN(s) ((s)->len)
typedef struct f_str_tok {
gsize len;
const gchar *begin;
} rspamd_ftok_t;
typedef struct f_str_unicode_tok {
gsize len; /* in uchars */
const UChar *begin;
} rspamd_ftok_unicode_t;
/**
* Create new fixed length string
*/
rspamd_fstring_t* rspamd_fstring_new (void)
G_GNUC_WARN_UNUSED_RESULT;
/**
* Create new fixed length string with preallocated size
*/
rspamd_fstring_t *rspamd_fstring_sized_new (gsize initial_size)
G_GNUC_WARN_UNUSED_RESULT;
/**
* Create new fixed length string and initialize it with the initial data
*/
rspamd_fstring_t *rspamd_fstring_new_init (const gchar *init, gsize len)
G_GNUC_WARN_UNUSED_RESULT;
/**
* Assign new value to fixed string
*/
rspamd_fstring_t *rspamd_fstring_assign (rspamd_fstring_t *str,
const gchar *init, gsize len) G_GNUC_WARN_UNUSED_RESULT;
/**
* Free fixed length string
*/
void rspamd_fstring_free (rspamd_fstring_t *str);
/**
* Append data to a fixed length string
*/
rspamd_fstring_t* rspamd_fstring_append (rspamd_fstring_t *str,
const char *in, gsize len) G_GNUC_WARN_UNUSED_RESULT;
/**
* Append `len` repeated chars `c` to string `str`
*/
rspamd_fstring_t *rspamd_fstring_append_chars (rspamd_fstring_t *str,
char c, gsize len) G_GNUC_WARN_UNUSED_RESULT;
/**
* Erase `len` characters at position `pos`
*/
void rspamd_fstring_erase (rspamd_fstring_t *str, gsize pos, gsize len);
#define rspamd_fstring_clear(s) rspamd_fstring_erase(s, 0, s->len)
/**
* Convert fixed string to a zero terminated string. This string must be
* freed by a caller
*/
char * rspamd_fstring_cstr (const rspamd_fstring_t *str)
G_GNUC_WARN_UNUSED_RESULT;
/**
* Convert fixed string usign ftok_t to a zero terminated string. This string must be
* freed by a caller
*/
char * rspamd_ftok_cstr (const rspamd_ftok_t *str)
G_GNUC_WARN_UNUSED_RESULT;
/*
* Return fast hash value for fixed string converted to lowercase
*/
guint32 rspamd_fstrhash_lc (const rspamd_ftok_t *str, gboolean is_utf);
/**
* Return true if two strings are equal
*/
gboolean rspamd_fstring_equal (const rspamd_fstring_t *s1,
const rspamd_fstring_t *s2);
/**
* Compare two fixed strings ignoring case
*/
gint rspamd_fstring_casecmp (const rspamd_fstring_t *s1,
const rspamd_fstring_t *s2);
/**
* Compare two fixed strings
*/
gint rspamd_fstring_cmp (const rspamd_fstring_t *s1,
const rspamd_fstring_t *s2);
/**
* Compare two fixed tokens ignoring case
*/
gint rspamd_ftok_casecmp (const rspamd_ftok_t *s1,
const rspamd_ftok_t *s2);
/**
* Compare two fixed tokens
*/
gint rspamd_ftok_cmp (const rspamd_ftok_t *s1,
const rspamd_ftok_t *s2);
/**
* Return TRUE if ftok is equal to specified C string
*/
gboolean rspamd_ftok_cstr_equal (const rspamd_ftok_t *s,
const gchar *pat, gboolean icase);
/**
* Free fstring_t that is mapped to ftok_t
*
* | len | allocated | <data> -- fstring_t
* <begin> -- tok
*
* tok is expected to be allocated with g_malloc
*/
void rspamd_fstring_mapped_ftok_free (gpointer p);
/**
* Map token to a specified string. Token must be freed using g_free
*/
rspamd_ftok_t *rspamd_ftok_map (const rspamd_fstring_t *s);
/**
* Suggest suitable size to grow fstring
* @param len
* @param allocated
* @param needed_len
* @return
*/
gsize rspamd_fstring_suggest_size (gsize len, gsize allocated, gsize needed_len);
/**
* Grow the specified fixed string
* @param str
* @param needed_len
* @return
*/
rspamd_fstring_t * rspamd_fstring_grow (rspamd_fstring_t *str,
gsize needed_len) G_GNUC_WARN_UNUSED_RESULT;
/**
* Copies ftok to zero terminated string (must be freed using g_free)
* @param src
* @return
*/
gchar *rspamd_ftokdup (const rspamd_ftok_t *src) G_GNUC_WARN_UNUSED_RESULT;
/**
* Copies fstring to zero terminated string (must be freed using g_free)
* @param src
* @return
*/
gchar *rspamd_fstringdup (const rspamd_fstring_t *src) G_GNUC_WARN_UNUSED_RESULT;
#define RSPAMD_FTOK_ASSIGN(t, lit) do { (t)->begin = (lit); (t)->len = sizeof(lit) - 1; } while (0)
#define RSPAMD_FTOK_FROM_STR(t, str) do { \
if (G_LIKELY(str)) { \
(t)->begin = (const char*)(str); \
(t)->len = strlen (str); \
} \
else { \
(t)->begin = NULL; \
(t)->len = 0; \
} \
} while (0)
#endif
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