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mbtable.h File Reference

Type representing a multibyte character table. More...

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Data Structures

struct  MbTable
 Multibyte character table. More...
 

Functions

void mbtable_free (struct MbTable **table)
 Free an MbTable object. More...
 
struct MbTablembtable_parse (const char *str)
 Parse a multibyte string into a table. More...
 

Detailed Description

Type representing a multibyte character table.

Authors
  • Richard Russon

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file mbtable.h.

Function Documentation

◆ mbtable_free()

void mbtable_free ( struct MbTable **  table)

Free an MbTable object.

Parameters
[out]tableMbTable to free

Definition at line 280 of file mbtable.c.

281{
282 if (!table || !*table)
283 return;
284
285 FREE(&(*table)->orig_str);
286 FREE(&(*table)->chars);
287 FREE(&(*table)->segmented_str);
288 FREE(table);
289}
#define FREE(x)
Definition: memory.h:43
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◆ mbtable_parse()

struct MbTable * mbtable_parse ( const char *  s)

Parse a multibyte string into a table.

Parameters
sString of multibyte characters
Return values
ptrNew MbTable object

Definition at line 49 of file mbtable.c.

50{
51 struct MbTable *t = NULL;
52 size_t slen, k;
53 mbstate_t mbstate = { 0 };
54 char *d = NULL;
55
56 slen = mutt_str_len(s);
57 if (!slen)
58 return NULL;
59
60 t = mutt_mem_calloc(1, sizeof(struct MbTable));
61
62 t->orig_str = mutt_str_dup(s);
63 /* This could be more space efficient. However, being used on tiny
64 * strings (`$to_chars` and `$status_chars`), the overhead is not great. */
65 t->chars = mutt_mem_calloc(slen, sizeof(char *));
66 t->segmented_str = mutt_mem_calloc(slen * 2, sizeof(char));
67 d = t->segmented_str;
68
69 while (slen && (k = mbrtowc(NULL, s, slen, &mbstate)))
70 {
71 if ((k == (size_t) (-1)) || (k == (size_t) (-2)))
72 {
73 /* XXX put message in err buffer; fail? warning? */
74 mutt_debug(LL_DEBUG1, "mbrtowc returned %d converting %s in %s\n",
75 (k == (size_t) (-1)) ? -1 : -2, s, t->orig_str);
76 if (k == (size_t) (-1))
77 memset(&mbstate, 0, sizeof(mbstate));
78 k = (k == (size_t) (-1)) ? 1 : slen;
79 }
80
81 slen -= k;
82 t->chars[t->len++] = d;
83 while (k--)
84 *d++ = *s++;
85 *d++ = '\0';
86 }
87
88 return t;
89}
#define mutt_debug(LEVEL,...)
Definition: logging.h:84
@ LL_DEBUG1
Log at debug level 1.
Definition: logging.h:40
void * mutt_mem_calloc(size_t nmemb, size_t size)
Allocate zeroed memory on the heap.
Definition: memory.c:50
char * mutt_str_dup(const char *str)
Copy a string, safely.
Definition: string.c:250
size_t mutt_str_len(const char *a)
Calculate the length of a string, safely.
Definition: string.c:567
Multibyte character table.
Definition: mbtable.h:34
char * orig_str
Original string used to generate this object.
Definition: mbtable.h:35
int len
Number of characters.
Definition: mbtable.h:36
char ** chars
The array of multibyte character strings.
Definition: mbtable.h:37
char * segmented_str
Each chars entry points inside this string.
Definition: mbtable.h:38
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