/*
UTF-8 strings utilities
Copyright (C) 2007-2024
Free Software Foundation, Inc.
Written by:
Rostislav Benes, 2007
This file is part of the Midnight Commander.
The Midnight Commander 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.
The Midnight Commander 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 .
*/
#include
#include
#include
#include /* MB_LEN_MAX */
#include
#include "lib/global.h"
#include "lib/strutil.h"
/* using function for utf-8 from glib */
/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
/*** file scope type declarations ****************************************************************/
struct utf8_tool
{
char *actual;
size_t remain;
const char *checked;
int ident;
gboolean compose;
};
struct term_form
{
char text[BUF_MEDIUM * MB_LEN_MAX];
size_t width;
gboolean compose;
};
/*** forward declarations (file scope functions) *************************************************/
/*** file scope variables ************************************************************************/
static const char replch[] = "\xEF\xBF\xBD";
/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_unichar_iscombiningmark (gunichar uni)
{
GUnicodeType type;
type = g_unichar_type (uni);
return (type == G_UNICODE_SPACING_MARK)
|| (type == G_UNICODE_ENCLOSING_MARK) || (type == G_UNICODE_NON_SPACING_MARK);
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_insert_replace_char (GString *buffer)
{
g_string_append (buffer, replch);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_is_valid_string (const char *text)
{
return g_utf8_validate (text, -1, NULL);
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_is_valid_char (const char *ch, size_t size)
{
switch (g_utf8_get_char_validated (ch, size))
{
case (gunichar) (-2):
return (-2);
case (gunichar) (-1):
return (-1);
default:
return 1;
}
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_cnext_char (const char **text)
{
(*text) = g_utf8_next_char (*text);
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_cprev_char (const char **text)
{
(*text) = g_utf8_prev_char (*text);
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_cnext_char_safe (const char **text)
{
if (str_utf8_is_valid_char (*text, -1) == 1)
(*text) = g_utf8_next_char (*text);
else
(*text)++;
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_cprev_char_safe (const char **text)
{
const char *result, *t;
result = g_utf8_prev_char (*text);
t = result;
str_utf8_cnext_char_safe (&t);
if (t == *text)
(*text) = result;
else
(*text)--;
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_fix_string (char *text)
{
while (text[0] != '\0')
{
gunichar uni;
uni = g_utf8_get_char_validated (text, -1);
if ((uni != (gunichar) (-1)) && (uni != (gunichar) (-2)))
text = g_utf8_next_char (text);
else
{
text[0] = '?';
text++;
}
}
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_isspace (const char *text)
{
gunichar uni;
uni = g_utf8_get_char_validated (text, -1);
return g_unichar_isspace (uni);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_ispunct (const char *text)
{
gunichar uni;
uni = g_utf8_get_char_validated (text, -1);
return g_unichar_ispunct (uni);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_isalnum (const char *text)
{
gunichar uni;
uni = g_utf8_get_char_validated (text, -1);
return g_unichar_isalnum (uni);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_isdigit (const char *text)
{
gunichar uni;
uni = g_utf8_get_char_validated (text, -1);
return g_unichar_isdigit (uni);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_isprint (const char *ch)
{
gunichar uni;
uni = g_utf8_get_char_validated (ch, -1);
return g_unichar_isprint (uni);
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_iscombiningmark (const char *ch)
{
gunichar uni;
uni = g_utf8_get_char_validated (ch, -1);
return str_unichar_iscombiningmark (uni);
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_cnext_noncomb_char (const char **text)
{
int count = 0;
while ((*text)[0] != '\0')
{
str_utf8_cnext_char_safe (text);
count++;
if (!str_utf8_iscombiningmark (*text))
break;
}
return count;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_cprev_noncomb_char (const char **text, const char *begin)
{
int count = 0;
while ((*text) != begin)
{
str_utf8_cprev_char_safe (text);
count++;
if (!str_utf8_iscombiningmark (*text))
break;
}
return count;
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_toupper (const char *text, char **out, size_t *remain)
{
gunichar uni;
size_t left;
uni = g_utf8_get_char_validated (text, -1);
if (uni == (gunichar) (-1) || uni == (gunichar) (-2))
return FALSE;
uni = g_unichar_toupper (uni);
left = g_unichar_to_utf8 (uni, NULL);
if (left >= *remain)
return FALSE;
left = g_unichar_to_utf8 (uni, *out);
(*out) += left;
(*remain) -= left;
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
static gboolean
str_utf8_tolower (const char *text, char **out, size_t *remain)
{
gunichar uni;
size_t left;
uni = g_utf8_get_char_validated (text, -1);
if (uni == (gunichar) (-1) || uni == (gunichar) (-2))
return FALSE;
uni = g_unichar_tolower (uni);
left = g_unichar_to_utf8 (uni, NULL);
if (left >= *remain)
return FALSE;
left = g_unichar_to_utf8 (uni, *out);
(*out) += left;
(*remain) -= left;
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_length (const char *text)
{
int result = 0;
const char *start;
const char *end;
start = text;
while (!g_utf8_validate (start, -1, &end) && start[0] != '\0')
{
if (start != end)
result += g_utf8_strlen (start, end - start);
result++;
start = end + 1;
}
if (start == text)
result = g_utf8_strlen (text, -1);
else if (start[0] != '\0' && start != end)
result += g_utf8_strlen (start, end - start);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_length2 (const char *text, int size)
{
int result = 0;
const char *start;
const char *end;
start = text;
while (!g_utf8_validate (start, -1, &end) && start[0] != '\0' && size > 0)
{
if (start != end)
{
result += g_utf8_strlen (start, MIN (end - start, size));
size -= end - start;
}
result += (size > 0);
size--;
start = end + 1;
}
if (start == text)
result = g_utf8_strlen (text, size);
else if (start[0] != '\0' && start != end && size > 0)
result += g_utf8_strlen (start, MIN (end - start, size));
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_length_noncomb (const char *text)
{
int result = 0;
const char *t = text;
while (t[0] != '\0')
{
str_utf8_cnext_noncomb_char (&t);
result++;
}
return result;
}
/* --------------------------------------------------------------------------------------------- */
#if 0
static void
str_utf8_questmark_sustb (char **string, size_t *left, GString *buffer)
{
char *next;
next = g_utf8_next_char (*string);
(*left) -= next - (*string);
(*string) = next;
g_string_append_c (buffer, '?');
}
#endif
/* --------------------------------------------------------------------------------------------- */
static gchar *
str_utf8_conv_gerror_message (GError *mcerror, const char *def_msg)
{
if (mcerror != NULL)
return g_strdup (mcerror->message);
return g_strdup (def_msg != NULL ? def_msg : "");
}
/* --------------------------------------------------------------------------------------------- */
static estr_t
str_utf8_vfs_convert_to (GIConv coder, const char *string, int size, GString *buffer)
{
estr_t result = ESTR_SUCCESS;
if (coder == str_cnv_not_convert)
g_string_append_len (buffer, string, size);
else
result = str_nconvert (coder, string, size, buffer);
return result;
}
/* --------------------------------------------------------------------------------------------- */
/* utility function, that makes string valid in utf8 and all characters printable
* return width of string too */
static const struct term_form *
str_utf8_make_make_term_form (const char *text, size_t length)
{
static struct term_form result;
gunichar uni;
size_t left;
char *actual;
result.text[0] = '\0';
result.width = 0;
result.compose = FALSE;
actual = result.text;
/* check if text start with combining character,
* add space at begin in this case */
if (length != 0 && text[0] != '\0')
{
uni = g_utf8_get_char_validated (text, -1);
if ((uni != (gunichar) (-1)) && (uni != (gunichar) (-2))
&& str_unichar_iscombiningmark (uni))
{
actual[0] = ' ';
actual++;
result.width++;
result.compose = TRUE;
}
}
while (length != 0 && text[0] != '\0')
{
uni = g_utf8_get_char_validated (text, -1);
if ((uni != (gunichar) (-1)) && (uni != (gunichar) (-2)))
{
if (g_unichar_isprint (uni))
{
left = g_unichar_to_utf8 (uni, actual);
actual += left;
if (str_unichar_iscombiningmark (uni))
result.compose = TRUE;
else
{
result.width++;
if (g_unichar_iswide (uni))
result.width++;
}
}
else
{
actual[0] = '.';
actual++;
result.width++;
}
text = g_utf8_next_char (text);
}
else
{
text++;
/*actual[0] = '?'; */
memcpy (actual, replch, strlen (replch));
actual += strlen (replch);
result.width++;
}
if (length != (size_t) (-1))
length--;
}
actual[0] = '\0';
return &result;
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_term_form (const char *text)
{
static char result[BUF_MEDIUM * MB_LEN_MAX];
const struct term_form *pre_form;
pre_form = str_utf8_make_make_term_form (text, (size_t) (-1));
if (pre_form->compose)
{
char *composed;
composed = g_utf8_normalize (pre_form->text, -1, G_NORMALIZE_DEFAULT_COMPOSE);
g_strlcpy (result, composed, sizeof (result));
g_free (composed);
}
else
g_strlcpy (result, pre_form->text, sizeof (result));
return result;
}
/* --------------------------------------------------------------------------------------------- */
/* utility function, that copies all characters from checked to actual */
static gboolean
utf8_tool_copy_chars_to_end (struct utf8_tool *tool)
{
tool->compose = FALSE;
while (tool->checked[0] != '\0')
{
gunichar uni;
size_t left;
uni = g_utf8_get_char (tool->checked);
tool->compose = tool->compose || str_unichar_iscombiningmark (uni);
left = g_unichar_to_utf8 (uni, NULL);
if (tool->remain <= left)
return FALSE;
left = g_unichar_to_utf8 (uni, tool->actual);
tool->actual += left;
tool->remain -= left;
tool->checked = g_utf8_next_char (tool->checked);
}
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
/* utility function, that copies characters from checked to actual until ident is
* smaller than to_ident */
static gboolean
utf8_tool_copy_chars_to (struct utf8_tool *tool, int to_ident)
{
tool->compose = FALSE;
while (tool->checked[0] != '\0')
{
gunichar uni;
size_t left;
int w = 0;
uni = g_utf8_get_char (tool->checked);
if (str_unichar_iscombiningmark (uni))
tool->compose = TRUE;
else
{
w = 1;
if (g_unichar_iswide (uni))
w++;
if (tool->ident + w > to_ident)
return TRUE;
}
left = g_unichar_to_utf8 (uni, NULL);
if (tool->remain <= left)
return FALSE;
left = g_unichar_to_utf8 (uni, tool->actual);
tool->actual += left;
tool->remain -= left;
tool->checked = g_utf8_next_char (tool->checked);
tool->ident += w;
}
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
/* utility function, adds count spaces to actual */
static int
utf8_tool_insert_space (struct utf8_tool *tool, int count)
{
if (count <= 0)
return 1;
if (tool->remain <= (gsize) count)
return 0;
memset (tool->actual, ' ', count);
tool->actual += count;
tool->remain -= count;
return 1;
}
/* --------------------------------------------------------------------------------------------- */
/* utility function, adds one characters to actual */
static int
utf8_tool_insert_char (struct utf8_tool *tool, char ch)
{
if (tool->remain <= 1)
return 0;
tool->actual[0] = ch;
tool->actual++;
tool->remain--;
return 1;
}
/* --------------------------------------------------------------------------------------------- */
/* utility function, thah skips characters from checked until ident is greater or
* equal to to_ident */
static gboolean
utf8_tool_skip_chars_to (struct utf8_tool *tool, int to_ident)
{
gunichar uni;
while (to_ident > tool->ident && tool->checked[0] != '\0')
{
uni = g_utf8_get_char (tool->checked);
if (!str_unichar_iscombiningmark (uni))
{
tool->ident++;
if (g_unichar_iswide (uni))
tool->ident++;
}
tool->checked = g_utf8_next_char (tool->checked);
}
uni = g_utf8_get_char (tool->checked);
while (str_unichar_iscombiningmark (uni))
{
tool->checked = g_utf8_next_char (tool->checked);
uni = g_utf8_get_char (tool->checked);
}
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
static void
utf8_tool_compose (char *buffer, size_t size)
{
char *composed;
composed = g_utf8_normalize (buffer, -1, G_NORMALIZE_DEFAULT_COMPOSE);
g_strlcpy (buffer, composed, size);
g_free (composed);
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_fit_to_term (const char *text, int width, align_crt_t just_mode)
{
static char result[BUF_MEDIUM * MB_LEN_MAX];
const struct term_form *pre_form;
struct utf8_tool tool;
pre_form = str_utf8_make_make_term_form (text, (size_t) (-1));
tool.checked = pre_form->text;
tool.actual = result;
tool.remain = sizeof (result);
tool.compose = FALSE;
if (pre_form->width <= (gsize) width)
{
switch (HIDE_FIT (just_mode))
{
case J_CENTER_LEFT:
case J_CENTER:
tool.ident = (width - pre_form->width) / 2;
break;
case J_RIGHT:
tool.ident = width - pre_form->width;
break;
default:
tool.ident = 0;
break;
}
utf8_tool_insert_space (&tool, tool.ident);
utf8_tool_copy_chars_to_end (&tool);
utf8_tool_insert_space (&tool, width - pre_form->width - tool.ident);
}
else if (IS_FIT (just_mode))
{
tool.ident = 0;
utf8_tool_copy_chars_to (&tool, width / 2);
utf8_tool_insert_char (&tool, '~');
tool.ident = 0;
utf8_tool_skip_chars_to (&tool, pre_form->width - width + 1);
utf8_tool_copy_chars_to_end (&tool);
utf8_tool_insert_space (&tool, width - (pre_form->width - tool.ident + 1));
}
else
{
switch (HIDE_FIT (just_mode))
{
case J_CENTER:
tool.ident = (width - pre_form->width) / 2;
break;
case J_RIGHT:
tool.ident = width - pre_form->width;
break;
default:
tool.ident = 0;
break;
}
utf8_tool_skip_chars_to (&tool, 0);
utf8_tool_insert_space (&tool, tool.ident);
utf8_tool_copy_chars_to (&tool, width);
utf8_tool_insert_space (&tool, width - tool.ident);
}
tool.actual[0] = '\0';
if (tool.compose)
utf8_tool_compose (result, sizeof (result));
return result;
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_term_trim (const char *text, int width)
{
static char result[BUF_MEDIUM * MB_LEN_MAX];
const struct term_form *pre_form;
struct utf8_tool tool;
if (width < 1)
{
result[0] = '\0';
return result;
}
pre_form = str_utf8_make_make_term_form (text, (size_t) (-1));
tool.checked = pre_form->text;
tool.actual = result;
tool.remain = sizeof (result);
tool.compose = FALSE;
if ((gsize) width >= pre_form->width)
utf8_tool_copy_chars_to_end (&tool);
else if (width <= 3)
{
memset (tool.actual, '.', width);
tool.actual += width;
tool.remain -= width;
}
else
{
memset (tool.actual, '.', 3);
tool.actual += 3;
tool.remain -= 3;
tool.ident = 0;
utf8_tool_skip_chars_to (&tool, pre_form->width - width + 3);
utf8_tool_copy_chars_to_end (&tool);
}
tool.actual[0] = '\0';
if (tool.compose)
utf8_tool_compose (result, sizeof (result));
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_term_width2 (const char *text, size_t length)
{
const struct term_form *result;
result = str_utf8_make_make_term_form (text, length);
return result->width;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_term_width1 (const char *text)
{
return str_utf8_term_width2 (text, (size_t) (-1));
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_term_char_width (const char *text)
{
gunichar uni;
uni = g_utf8_get_char_validated (text, -1);
return (str_unichar_iscombiningmark (uni)) ? 0 : ((g_unichar_iswide (uni)) ? 2 : 1);
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_term_substring (const char *text, int start, int width)
{
static char result[BUF_MEDIUM * MB_LEN_MAX];
const struct term_form *pre_form;
struct utf8_tool tool;
pre_form = str_utf8_make_make_term_form (text, (size_t) (-1));
tool.checked = pre_form->text;
tool.actual = result;
tool.remain = sizeof (result);
tool.compose = FALSE;
tool.ident = -start;
utf8_tool_skip_chars_to (&tool, 0);
if (tool.ident < 0)
tool.ident = 0;
utf8_tool_insert_space (&tool, tool.ident);
utf8_tool_copy_chars_to (&tool, width);
utf8_tool_insert_space (&tool, width - tool.ident);
tool.actual[0] = '\0';
if (tool.compose)
utf8_tool_compose (result, sizeof (result));
return result;
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_trunc (const char *text, int width)
{
static char result[MC_MAXPATHLEN * MB_LEN_MAX * 2];
const struct term_form *pre_form;
struct utf8_tool tool;
pre_form = str_utf8_make_make_term_form (text, (size_t) (-1));
tool.checked = pre_form->text;
tool.actual = result;
tool.remain = sizeof (result);
tool.compose = FALSE;
if (pre_form->width <= (gsize) width)
utf8_tool_copy_chars_to_end (&tool);
else
{
tool.ident = 0;
utf8_tool_copy_chars_to (&tool, width / 2);
utf8_tool_insert_char (&tool, '~');
tool.ident = 0;
utf8_tool_skip_chars_to (&tool, pre_form->width - width + 1);
utf8_tool_copy_chars_to_end (&tool);
}
tool.actual[0] = '\0';
if (tool.compose)
utf8_tool_compose (result, sizeof (result));
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_offset_to_pos (const char *text, size_t length)
{
if (str_utf8_is_valid_string (text))
return g_utf8_offset_to_pointer (text, length) - text;
else
{
int result;
char *buffer;
buffer = g_strdup (text);
str_utf8_fix_string (buffer);
result = g_utf8_offset_to_pointer (buffer, length) - buffer;
g_free (buffer);
return result;
}
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_column_to_pos (const char *text, size_t pos)
{
int result = 0;
int width = 0;
while (text[0] != '\0')
{
gunichar uni;
uni = g_utf8_get_char_validated (text, MB_LEN_MAX);
if ((uni != (gunichar) (-1)) && (uni != (gunichar) (-2)))
{
if (g_unichar_isprint (uni))
{
if (!str_unichar_iscombiningmark (uni))
{
width++;
if (g_unichar_iswide (uni))
width++;
}
}
else
{
width++;
}
text = g_utf8_next_char (text);
}
else
{
text++;
width++;
}
if ((gsize) width > pos)
return result;
result++;
}
return result;
}
/* --------------------------------------------------------------------------------------------- */
static char *
str_utf8_create_search_needle (const char *needle, gboolean case_sen)
{
char *fold, *result;
if (needle == NULL)
return NULL;
if (case_sen)
return g_utf8_normalize (needle, -1, G_NORMALIZE_ALL);
fold = g_utf8_casefold (needle, -1);
result = g_utf8_normalize (fold, -1, G_NORMALIZE_ALL);
g_free (fold);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_release_search_needle (char *needle, gboolean case_sen)
{
(void) case_sen;
g_free (needle);
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_search_first (const char *text, const char *search, gboolean case_sen)
{
char *fold_text;
char *deco_text;
const char *match;
const char *result = NULL;
const char *m;
fold_text = case_sen ? (char *) text : g_utf8_casefold (text, -1);
deco_text = g_utf8_normalize (fold_text, -1, G_NORMALIZE_ALL);
match = deco_text;
do
{
match = g_strstr_len (match, -1, search);
if (match != NULL)
{
if ((!str_utf8_iscombiningmark (match) || (match == deco_text)) &&
!str_utf8_iscombiningmark (match + strlen (search)))
{
result = text;
m = deco_text;
while (m < match)
{
str_utf8_cnext_noncomb_char (&m);
str_utf8_cnext_noncomb_char (&result);
}
}
else
str_utf8_cnext_char (&match);
}
}
while (match != NULL && result == NULL);
g_free (deco_text);
if (!case_sen)
g_free (fold_text);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static const char *
str_utf8_search_last (const char *text, const char *search, gboolean case_sen)
{
char *fold_text;
char *deco_text;
char *match;
const char *result = NULL;
const char *m;
fold_text = case_sen ? (char *) text : g_utf8_casefold (text, -1);
deco_text = g_utf8_normalize (fold_text, -1, G_NORMALIZE_ALL);
do
{
match = g_strrstr_len (deco_text, -1, search);
if (match != NULL)
{
if ((!str_utf8_iscombiningmark (match) || (match == deco_text)) &&
!str_utf8_iscombiningmark (match + strlen (search)))
{
result = text;
m = deco_text;
while (m < match)
{
str_utf8_cnext_noncomb_char (&m);
str_utf8_cnext_noncomb_char (&result);
}
}
else
match[0] = '\0';
}
}
while (match != NULL && result == NULL);
g_free (deco_text);
if (!case_sen)
g_free (fold_text);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static char *
str_utf8_normalize (const char *text)
{
GString *fixed;
char *tmp;
char *result;
const char *start;
const char *end;
/* g_utf8_normalize() is a heavyweight function, that converts UTF-8 into UCS-4,
* does the normalization and then converts UCS-4 back into UTF-8.
* Since file names are composed of ASCII characters in most cases, we can speed up
* utf8 normalization by checking if the heavyweight Unicode normalization is actually
* needed. Normalization of ASCII string is no-op.
*/
/* find out whether text is ASCII only */
for (end = text; *end != '\0'; end++)
if ((*end & 0x80) != 0)
{
/* found 2nd byte of utf8-encoded symbol */
break;
}
/* if text is ASCII-only, return copy, normalize otherwise */
if (*end == '\0')
return g_strndup (text, end - text);
fixed = g_string_sized_new (4);
start = text;
while (!g_utf8_validate (start, -1, &end) && start[0] != '\0')
{
if (start != end)
{
tmp = g_utf8_normalize (start, end - start, G_NORMALIZE_ALL);
g_string_append (fixed, tmp);
g_free (tmp);
}
g_string_append_c (fixed, end[0]);
start = end + 1;
}
if (start == text)
{
result = g_utf8_normalize (text, -1, G_NORMALIZE_ALL);
g_string_free (fixed, TRUE);
}
else
{
if (start[0] != '\0' && start != end)
{
tmp = g_utf8_normalize (start, end - start, G_NORMALIZE_ALL);
g_string_append (fixed, tmp);
g_free (tmp);
}
result = g_string_free (fixed, FALSE);
}
return result;
}
/* --------------------------------------------------------------------------------------------- */
static char *
str_utf8_casefold_normalize (const char *text)
{
GString *fixed;
char *tmp, *fold;
char *result;
const char *start;
const char *end;
fixed = g_string_sized_new (4);
start = text;
while (!g_utf8_validate (start, -1, &end) && start[0] != '\0')
{
if (start != end)
{
fold = g_utf8_casefold (start, end - start);
tmp = g_utf8_normalize (fold, -1, G_NORMALIZE_ALL);
g_string_append (fixed, tmp);
g_free (tmp);
g_free (fold);
}
g_string_append_c (fixed, end[0]);
start = end + 1;
}
if (start == text)
{
fold = g_utf8_casefold (text, -1);
result = g_utf8_normalize (fold, -1, G_NORMALIZE_ALL);
g_free (fold);
g_string_free (fixed, TRUE);
}
else
{
if (start[0] != '\0' && start != end)
{
fold = g_utf8_casefold (start, end - start);
tmp = g_utf8_normalize (fold, -1, G_NORMALIZE_ALL);
g_string_append (fixed, tmp);
g_free (tmp);
g_free (fold);
}
result = g_string_free (fixed, FALSE);
}
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_compare (const char *t1, const char *t2)
{
char *n1, *n2;
int result;
n1 = str_utf8_normalize (t1);
n2 = str_utf8_normalize (t2);
result = strcmp (n1, n2);
g_free (n1);
g_free (n2);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_ncompare (const char *t1, const char *t2)
{
char *n1, *n2;
size_t l1, l2;
int result;
n1 = str_utf8_normalize (t1);
n2 = str_utf8_normalize (t2);
l1 = strlen (n1);
l2 = strlen (n2);
result = strncmp (n1, n2, MIN (l1, l2));
g_free (n1);
g_free (n2);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_casecmp (const char *t1, const char *t2)
{
char *n1, *n2;
int result;
n1 = str_utf8_casefold_normalize (t1);
n2 = str_utf8_casefold_normalize (t2);
result = strcmp (n1, n2);
g_free (n1);
g_free (n2);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_ncasecmp (const char *t1, const char *t2)
{
char *n1, *n2;
size_t l1, l2;
int result;
n1 = str_utf8_casefold_normalize (t1);
n2 = str_utf8_casefold_normalize (t2);
l1 = strlen (n1);
l2 = strlen (n2);
result = strncmp (n1, n2, MIN (l1, l2));
g_free (n1);
g_free (n2);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_prefix (const char *text, const char *prefix)
{
char *t, *p;
const char *nt, *np;
const char *nnt, *nnp;
int result;
t = str_utf8_normalize (text);
p = str_utf8_normalize (prefix);
nt = t;
np = p;
nnt = t;
nnp = p;
while (nt[0] != '\0' && np[0] != '\0')
{
str_utf8_cnext_char_safe (&nnt);
str_utf8_cnext_char_safe (&nnp);
if (nnt - nt != nnp - np)
break;
if (strncmp (nt, np, nnt - nt) != 0)
break;
nt = nnt;
np = nnp;
}
result = np - p;
g_free (t);
g_free (p);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_caseprefix (const char *text, const char *prefix)
{
char *t, *p;
const char *nt, *np;
const char *nnt, *nnp;
int result;
t = str_utf8_casefold_normalize (text);
p = str_utf8_casefold_normalize (prefix);
nt = t;
np = p;
nnt = t;
nnp = p;
while (nt[0] != '\0' && np[0] != '\0')
{
str_utf8_cnext_char_safe (&nnt);
str_utf8_cnext_char_safe (&nnp);
if (nnt - nt != nnp - np)
break;
if (strncmp (nt, np, nnt - nt) != 0)
break;
nt = nnt;
np = nnp;
}
result = np - p;
g_free (t);
g_free (p);
return result;
}
/* --------------------------------------------------------------------------------------------- */
static char *
str_utf8_create_key_gen (const char *text, gboolean case_sen,
gchar *(*keygen) (const gchar *text, gssize size))
{
char *result;
if (case_sen)
result = str_utf8_normalize (text);
else
{
gboolean dot;
GString *fixed;
const char *start, *end;
char *fold, *key;
dot = text[0] == '.';
fixed = g_string_sized_new (16);
if (!dot)
start = text;
else
{
start = text + 1;
g_string_append_c (fixed, '.');
}
while (!g_utf8_validate (start, -1, &end) && start[0] != '\0')
{
if (start != end)
{
fold = g_utf8_casefold (start, end - start);
key = keygen (fold, -1);
g_string_append (fixed, key);
g_free (key);
g_free (fold);
}
g_string_append_c (fixed, end[0]);
start = end + 1;
}
if (start == text)
{
fold = g_utf8_casefold (start, -1);
result = keygen (fold, -1);
g_free (fold);
g_string_free (fixed, TRUE);
}
else if (dot && (start == text + 1))
{
fold = g_utf8_casefold (start, -1);
key = keygen (fold, -1);
g_string_append (fixed, key);
g_free (key);
g_free (fold);
result = g_string_free (fixed, FALSE);
}
else
{
if (start[0] != '\0' && start != end)
{
fold = g_utf8_casefold (start, end - start);
key = keygen (fold, -1);
g_string_append (fixed, key);
g_free (key);
g_free (fold);
}
result = g_string_free (fixed, FALSE);
}
}
return result;
}
/* --------------------------------------------------------------------------------------------- */
static char *
str_utf8_create_key (const char *text, gboolean case_sen)
{
return str_utf8_create_key_gen (text, case_sen, g_utf8_collate_key);
}
/* --------------------------------------------------------------------------------------------- */
#ifdef MC__USE_STR_UTF8_CREATE_KEY_FOR_FILENAME
static char *
str_utf8_create_key_for_filename (const char *text, gboolean case_sen)
{
return str_utf8_create_key_gen (text, case_sen, g_utf8_collate_key_for_filename);
}
#endif
/* --------------------------------------------------------------------------------------------- */
static int
str_utf8_key_collate (const char *t1, const char *t2, gboolean case_sen)
{
(void) case_sen;
return strcmp (t1, t2);
}
/* --------------------------------------------------------------------------------------------- */
static void
str_utf8_release_key (char *key, gboolean case_sen)
{
(void) case_sen;
g_free (key);
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
struct str_class
str_utf8_init (void)
{
struct str_class result;
result.conv_gerror_message = str_utf8_conv_gerror_message;
result.vfs_convert_to = str_utf8_vfs_convert_to;
result.insert_replace_char = str_utf8_insert_replace_char;
result.is_valid_string = str_utf8_is_valid_string;
result.is_valid_char = str_utf8_is_valid_char;
result.cnext_char = str_utf8_cnext_char;
result.cprev_char = str_utf8_cprev_char;
result.cnext_char_safe = str_utf8_cnext_char_safe;
result.cprev_char_safe = str_utf8_cprev_char_safe;
result.cnext_noncomb_char = str_utf8_cnext_noncomb_char;
result.cprev_noncomb_char = str_utf8_cprev_noncomb_char;
result.char_isspace = str_utf8_isspace;
result.char_ispunct = str_utf8_ispunct;
result.char_isalnum = str_utf8_isalnum;
result.char_isdigit = str_utf8_isdigit;
result.char_isprint = str_utf8_isprint;
result.char_iscombiningmark = str_utf8_iscombiningmark;
result.char_toupper = str_utf8_toupper;
result.char_tolower = str_utf8_tolower;
result.length = str_utf8_length;
result.length2 = str_utf8_length2;
result.length_noncomb = str_utf8_length_noncomb;
result.fix_string = str_utf8_fix_string;
result.term_form = str_utf8_term_form;
result.fit_to_term = str_utf8_fit_to_term;
result.term_trim = str_utf8_term_trim;
result.term_width2 = str_utf8_term_width2;
result.term_width1 = str_utf8_term_width1;
result.term_char_width = str_utf8_term_char_width;
result.term_substring = str_utf8_term_substring;
result.trunc = str_utf8_trunc;
result.offset_to_pos = str_utf8_offset_to_pos;
result.column_to_pos = str_utf8_column_to_pos;
result.create_search_needle = str_utf8_create_search_needle;
result.release_search_needle = str_utf8_release_search_needle;
result.search_first = str_utf8_search_first;
result.search_last = str_utf8_search_last;
result.compare = str_utf8_compare;
result.ncompare = str_utf8_ncompare;
result.casecmp = str_utf8_casecmp;
result.ncasecmp = str_utf8_ncasecmp;
result.prefix = str_utf8_prefix;
result.caseprefix = str_utf8_caseprefix;
result.create_key = str_utf8_create_key;
#ifdef MC__USE_STR_UTF8_CREATE_KEY_FOR_FILENAME
/* case insensitive sort files in "a1 a2 a10" order */
result.create_key_for_filename = str_utf8_create_key_for_filename;
#else
/* case insensitive sort files in "a1 a10 a2" order */
result.create_key_for_filename = str_utf8_create_key;
#endif
result.key_collate = str_utf8_key_collate;
result.release_key = str_utf8_release_key;
return result;
}
/* --------------------------------------------------------------------------------------------- */