/*
* Copyright (c) 2003-2007 by FlashCode <flashcode@flashtux.org>
* See README for License detail, AUTHORS for developers list.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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/>.
*/
/* util.c: some useful functions for WeeChat */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <errno.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_ICONV
#include <iconv.h>
#endif
#ifndef ICONV_CONST
#ifdef ICONV_2ARG_IS_CONST
#define ICONV_CONST const
#else
#define ICONV_CONST
#endif
#endif
#include "weechat.h"
#include "utf8.h"
#include "weeconfig.h"
/*
* strndup: define strndup function if not existing (FreeBSD and maybe other)
*/
#ifndef HAVE_STRNDUP
char *
strndup (char *string, int length)
{
char *result;
if ((int)strlen (string) < length)
return strdup (string);
result = (char *)malloc (length + 1);
if (!result)
return NULL;
memcpy (result, string, length);
result[length] = '\0';
return result;
}
#endif
/*
* ascii_tolower: locale independant string conversion to lower case
*/
void
ascii_tolower (char *string)
{
while (string && string[0])
{
if ((string[0] >= 'A') && (string[0] <= 'Z'))
string[0] += ('a' - 'A');
string++;
}
}
/*
* ascii_toupper: locale independant string conversion to upper case
*/
void
ascii_toupper (char *string)
{
while (string && string[0])
{
if ((string[0] >= 'a') && (string[0] <= 'z'))
string[0] -= ('a' - 'A');
string++;
}
}
/*
* ascii_strcasecmp: locale and case independent string comparison
*/
int
ascii_strcasecmp (char *string1, char *string2)
{
int c1, c2;
if (!string1 || !string2)
return (string1) ? 1 : ((string2) ? -1 : 0);
while (string1[0] && string2[0])
{
c1 = (int)((unsigned char) string1[0]);
c2 = (int)((unsigned char) string2[0]);
if ((c1 >= 'A') && (c1 <= 'Z'))
c1 += ('a' - 'A');
if ((c2 >= 'A') && (c2 <= 'Z'))
c2 += ('a' - 'A');
if ((c1 - c2) != 0)
return c1 - c2;
string1++;
string2++;
}
return (string1[0]) ? 1 : ((string2[0]) ? -1 : 0);
}
/*
* ascii_strncasecmp: locale and case independent string comparison
* with max length
*/
int
ascii_strncasecmp (char *string1, char *string2, int max)
{
int c1, c2, count;
if (!string1 || !string2)
return (string1) ? 1 : ((string2) ? -1 : 0);
count = 0;
while ((count < max) && string1[0] && string2[0])
{
c1 = (int)((unsigned char) string1[0]);
c2 = (int)((unsigned char) string2[0]);
if ((c1 >= 'A') && (c1 <= 'Z'))
c1 += ('a' - 'A');
if ((c2 >= 'A') && (c2 <= 'Z'))
c2 += ('a' - 'A');
if ((c1 - c2) != 0)
return c1 - c2;
string1++;
string2++;
count++;
}
if (count >= max)
return 0;
else
return (string1[0]) ? 1 : ((string2[0]) ? -1 : 0);
}
/*
* ascii_strcasestr: locale and case independent string search
*/
char *
ascii_strcasestr (char *string, char *search)
{
int length_search;
length_search = strlen (search);
if (!string || !search || (length_search == 0))
return NULL;
while (string[0])
{
if (ascii_strncasecmp (string, search, length_search) == 0)
return string;
string++;
}
return NULL;
}
/*
* weechat_iconv: convert string to another charset
*/
char *
weechat_iconv (int from_utf8, char *from_code, char *to_code, char *string)
{
char *outbuf;
#ifdef HAVE_ICONV
iconv_t cd;
char *inbuf, *ptr_inbuf, *ptr_outbuf, *next_char;
char *ptr_inbuf_shift;
int done;
size_t err, inbytesleft, outbytesleft;
if (from_code && from_code[0] && to_code && to_code[0]
&& (ascii_strcasecmp(from_code, to_code) != 0))
{
cd = iconv_open (to_code, from_code);
if (cd == (iconv_t)(-1))
outbuf = strdup (string);
else
{
inbuf = strdup (string);
ptr_inbuf = inbuf;
inbytesleft = strlen (inbuf);
outbytesleft = inbytesleft * 4;
outbuf = (char *) malloc (outbytesleft + 2);
ptr_outbuf = outbuf;
ptr_inbuf_shift = NULL;
done = 0;
while (!done)
{
err = iconv (cd, (ICONV_CONST char **)(&ptr_inbuf), &inbytesleft,
&ptr_outbuf, &outbytesleft);
if (err == (size_t)(-1))
{
switch (errno)
{
case EINVAL:
done = 1;
break;
case E2BIG:
done = 1;
break;
case EILSEQ:
if (from_utf8)
{
next_char = utf8_next_char (ptr_inbuf);
if (next_char)
{
inbytesleft -= next_char - ptr_inbuf;
ptr_inbuf = next_char;
}
else
{
inbytesleft--;
ptr_inbuf++;
}
}
else
{
ptr_inbuf++;
inbytesleft--;
}
ptr_outbuf[0] = '?';
ptr_outbuf++;
outbytesleft--;
break;
}
}
else
{
if (!ptr_inbuf_shift)
{
ptr_inbuf_shift = ptr_inbuf;
ptr_inbuf = NULL;
inbytesleft = 0;
}
else
done = 1;
}
}
if (ptr_inbuf_shift)
ptr_inbuf = ptr_inbuf_shift;
ptr_outbuf[0] = '\0';
free (inbuf);
iconv_close (cd);
}
}
else
outbuf = strdup (string);
#else
/* make C compiler happy */
(void) from_utf8;
(void) from_code;
(void) to_code;
outbuf = strdup (string);
#endif /* HAVE_ICONV */
return outbuf;
}
/*
* weechat_iconv_to_internal: convert user string (input, script, ..) to
* WeeChat internal storage charset
*/
char *
weechat_iconv_to_internal (char *charset, char *string)
{
char *input, *output;
input = strdup (string);
/* optimize for UTF-8: if charset is NULL => we use term charset =>
if ths charset is already UTF-8, then no iconv needed */
if (local_utf8 && (!charset || !charset[0]))
return input;
if (input)
{
if (utf8_has_8bits (input) && utf8_is_valid (input, NULL))
return input;
output = weechat_iconv (0,
(charset && charset[0]) ?
charset : local_charset,
WEECHAT_INTERNAL_CHARSET,
input);
utf8_normalize (output, '?');
free (input);
return output;
}
return NULL;
}
/*
* weechat_iconv_from_internal: convert internal string to terminal charset,
* for display
*/
char *
weechat_iconv_from_internal (char *charset, char *string)
{
char *input, *output;
input = strdup (string);
/* optimize for UTF-8: if charset is NULL => we use term charset =>
if ths charset is already UTF-8, then no iconv needed */
if (local_utf8 && (!charset || !charset[0]))
return input;
if (input)
{
utf8_normalize (input, '?');
output = weechat_iconv (1,
WEECHAT_INTERNAL_CHARSET,
(charset && charset[0]) ?
charset : local_charset,
input);
free (input);
return output;
}
return NULL;
}
/*
* weechat_iconv_fprintf: encode to terminal charset, then call fprintf on a file
*/
void
weechat_iconv_fprintf (FILE *file, char *data, ...)
{
va_list argptr;
static char buf[4096];
char *buf2;
va_start (argptr, data);
vsnprintf (buf, sizeof (buf) - 1, data, argptr);
va_end (argptr);
buf2 = weechat_iconv_from_internal (NULL, buf);
fprintf (file, "%s", (buf2) ? buf2 : buf);
if (buf2)
free (buf2);
}
/*
* weechat_strreplace: replace a string by new one in a string
* note: returned value has to be free() after use
*/
char *
weechat_strreplace (char *string, char *search, char *replace)
{
char *pos, *new_string;
int length1, length2, length_new, count;
if (!string || !search || !replace)
return NULL;
length1 = strlen (search);
length2 = strlen (replace);
/* count number of strings to replace */
count = 0;
pos = string;
while (pos && pos[0] && (pos = strstr (pos, search)))
{
count++;
pos += length1;
}
/* easy: no string to replace! */
if (count == 0)
return strdup (string);
/* compute needed memory for new string */
length_new = strlen (string) - (count * length1) + (count * length2) + 1;
/* allocate new string */
new_string = (char *)malloc (length_new * sizeof (char));
if (!new_string)
return strdup (string);
/* replace all occurences */
new_string[0] = '\0';
while (string && string[0])
{
pos = strstr (string, search);
if (pos)
{
strncat (new_string, string, pos - string);
strcat (new_string, replace);
pos += length1;
}
else
strcat (new_string, string);
string = pos;
}
return new_string;
}
/*
* weechat_convert_hex_chars: convert hex chars (\x??) to value
*/
char *
weechat_convert_hex_chars (char *string)
{
char *output, hex_str[8], *error;
int pos_output;
long number;
output = (char *)malloc (strlen (string) + 1);
if (output)
{
pos_output = 0;
while (string && string[0])
{
if (string[0] == '\\')
{
string++;
switch (string[0])
{
case '\\':
output[pos_output++] = '\\';
string++;
break;
case 'x':
case 'X':
if (isxdigit (string[1])
&& isxdigit (string[2]))
{
snprintf (hex_str, sizeof (hex_str),
"0x%c%c", string[1], string[2]);
number = strtol (hex_str, &error, 16);
if ((error) && (error[0] == '\0'))
{
output[pos_output++] = number;
string += 3;
}
else
{
output[pos_output++] = '\\';
output[pos_output++] = string[0];
string++;
}
}
else
{
output[pos_output++] = string[0];
string++;
}
break;
default:
output[pos_output++] = '\\';
output[pos_output++] = string[0];
string++;
break;
}
}
else
{
output[pos_output++] = string[0];
string++;
}
}
output[pos_output] = '\0';
}
return output;
}
/*
* get_timeval_diff: calculates difference between two times (return in milliseconds)
*/
long
get_timeval_diff (struct timeval *tv1, struct timeval *tv2)
{
long diff_sec, diff_usec;
diff_sec = tv2->tv_sec - tv1->tv_sec;
diff_usec = tv2->tv_usec - tv1->tv_usec;
if (diff_usec < 0)
{
diff_usec += 1000000;
diff_sec--;
}
return ((diff_usec / 1000) + (diff_sec * 1000));
}
/*
* explode_string: explode a string according to separators
*/
char **
explode_string (char *string, char *separators, int num_items_max,
int *num_items)
{
int i, n_items;
char **array;
char *ptr, *ptr1, *ptr2;
if (num_items != NULL)
*num_items = 0;
if (!string || !string[0])
return NULL;
/* calculate number of items */
ptr = string;
i = 1;
while ((ptr = strpbrk (ptr, separators)))
{
while (strchr (separators, ptr[0]) != NULL)
ptr++;
i++;
}
n_items = i;
if ((num_items_max != 0) && (n_items > num_items_max))
n_items = num_items_max;
array =
(char **) malloc ((n_items + 1) * sizeof (char *));
ptr1 = string;
ptr2 = string;
for (i = 0; i < n_items; i++)
{
while (strchr (separators, ptr1[0]) != NULL)
ptr1++;
if (i == (n_items - 1) || (ptr2 = strpbrk (ptr1, separators)) == NULL)
if ((ptr2 = strchr (ptr1, '\r')) == NULL)
if ((ptr2 = strchr (ptr1, '\n')) == NULL)
ptr2 = strchr (ptr1, '\0');
if ((ptr1 == NULL) || (ptr2 == NULL))
{
array[i] = NULL;
}
else
{
if (ptr2 - ptr1 > 0)
{
array[i] =
(char *) malloc ((ptr2 - ptr1 + 1) * sizeof (char));
array[i] = strncpy (array[i], ptr1, ptr2 - ptr1);
array[i][ptr2 - ptr1] = '\0';
ptr1 = ++ptr2;
}
else
{
array[i] = NULL;
}
}
}
array[i] = NULL;
if (num_items != NULL)
*num_items = i;
return array;
}
/*
* free_exploded_string: free an exploded string
*/
void
free_exploded_string (char **exploded_string)
{
int i;
if (exploded_string)
{
for (i = 0; exploded_string[i]; i++)
free (exploded_string[i]);
free (exploded_string);
}
}
/*
* split_multi_command: split a list of commands separated by 'sep'
* and ecscaped with '\'
* - empty commands are removed
* - spaces on the left of each commands are stripped
* Result must be freed with free_multi_command
*/
char **
split_multi_command (char *command, char sep)
{
int nb_substr, arr_idx, str_idx, type;
char **array;
char *buffer, *ptr, *p;
if (command == NULL)
return NULL;
nb_substr = 1;
ptr = command;
while ( (p = strchr(ptr, sep)) != NULL)
{
nb_substr++;
ptr = ++p;
}
array = (char **) malloc ((nb_substr + 1) * sizeof(char *));
if (!array)
return NULL;
buffer = (char *) malloc ( (strlen(command) + 1) * sizeof (char));
if (!buffer)
{
free (array);
return NULL;
}
ptr = command;
str_idx = 0;
arr_idx = 0;
while(*ptr != '\0')
{
type = 0;
if (*ptr == ';')
{
if (ptr == command)
type = 1;
else if ( *(ptr-1) != '\\')
type = 1;
else if ( *(ptr-1) == '\\')
type = 2;
}
if (type == 1)
{
buffer[str_idx] = '\0';
str_idx = -1;
p = buffer;
/* strip white spaces a the begining of the line */
while (*p == ' ') p++;
if (p && p[0])
array[arr_idx++] = strdup (p);
}
else if (type == 2)
buffer[--str_idx] = *ptr;
else
buffer[str_idx] = *ptr;
str_idx++;
ptr++;
}
buffer[str_idx] = '\0';
p = buffer;
while (*p == ' ') p++;
if (p && p[0])
array[arr_idx++] = strdup (p);
array[arr_idx] = NULL;
free (buffer);
array = (char **) realloc (array, (arr_idx + 1) * sizeof(char *));
return array;
}
/*
* free_multi_command : free a list of commands splitted
* with split_multi_command
*/
void
free_multi_command (char **commands)
{
int i;
if (commands)
{
for (i = 0; commands[i]; i++)
free (commands[i]);
free (commands);
}
}
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