mirror of
https://github.com/MidnightCommander/mc
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678 lines
16 KiB
C
678 lines
16 KiB
C
/*
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ASCII strings utilities
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Copyright (C) 2007-2014
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Free Software Foundation, Inc.
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Written by:
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Rostislav Benes, 2007
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This file is part of the Midnight Commander.
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The Midnight Commander is free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the License,
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or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include "lib/global.h"
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#include "lib/strutil.h"
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/* using g_ascii function from glib
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* on terminal are showed only ascii characters (lower than 0x80)
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*/
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static const char replch = '?';
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static void
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str_ascii_insert_replace_char (GString * buffer)
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{
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g_string_append_c (buffer, replch);
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}
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static int
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str_ascii_is_valid_string (const char *text)
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{
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(void) text;
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return 1;
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}
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static int
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str_ascii_is_valid_char (const char *ch, size_t size)
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{
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(void) ch;
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(void) size;
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return 1;
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}
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static void
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str_ascii_cnext_char (const char **text)
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{
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(*text)++;
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}
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static void
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str_ascii_cprev_char (const char **text)
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{
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(*text)--;
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}
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static int
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str_ascii_cnext_noncomb_char (const char **text)
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{
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if (*text[0] == '\0')
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return 0;
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(*text)++;
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return 1;
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}
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static int
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str_ascii_cprev_noncomb_char (const char **text, const char *begin)
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{
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if ((*text) == begin)
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return 0;
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(*text)--;
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return 1;
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}
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static int
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str_ascii_isspace (const char *text)
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{
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return g_ascii_isspace ((gchar) text[0]);
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}
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static int
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str_ascii_ispunct (const char *text)
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{
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return g_ascii_ispunct ((gchar) text[0]);
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}
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static int
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str_ascii_isalnum (const char *text)
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{
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return g_ascii_isalnum ((gchar) text[0]);
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}
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static int
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str_ascii_isdigit (const char *text)
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{
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return g_ascii_isdigit ((gchar) text[0]);
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}
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static int
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str_ascii_isprint (const char *text)
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{
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return g_ascii_isprint ((gchar) text[0]);
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}
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static gboolean
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str_ascii_iscombiningmark (const char *text)
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{
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(void) text;
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return FALSE;
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}
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static int
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str_ascii_toupper (const char *text, char **out, size_t * remain)
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{
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if (*remain <= 1)
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return 0;
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(*out)[0] = (char) g_ascii_toupper ((gchar) text[0]);
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(*out)++;
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(*remain)--;
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return 1;
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}
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static int
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str_ascii_tolower (const char *text, char **out, size_t * remain)
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{
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if (*remain <= 1)
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return 0;
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(*out)[0] = (char) g_ascii_tolower ((gchar) text[0]);
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(*out)++;
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(*remain)--;
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return 1;
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}
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static int
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str_ascii_length (const char *text)
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{
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return strlen (text);
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}
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static int
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str_ascii_length2 (const char *text, int size)
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{
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return (size >= 0) ? min (strlen (text), (gsize) size) : strlen (text);
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}
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static gchar *
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str_ascii_conv_gerror_message (GError * error, const char *def_msg)
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{
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/* the same as str_utf8_conv_gerror_message() */
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if (error != NULL)
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return g_strdup (error->message);
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return g_strdup (def_msg != NULL ? def_msg : "");
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}
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static estr_t
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str_ascii_vfs_convert_to (GIConv coder, const char *string, int size, GString * buffer)
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{
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(void) coder;
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g_string_append_len (buffer, string, size);
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return ESTR_SUCCESS;
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}
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static const char *
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str_ascii_term_form (const char *text)
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{
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static char result[BUF_MEDIUM];
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char *actual;
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size_t remain;
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size_t length;
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size_t pos = 0;
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actual = result;
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remain = sizeof (result);
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length = strlen (text);
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/* go throw all characters and check, if they are ascii and printable */
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for (; pos < length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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actual[0] = '\0';
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return result;
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}
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static const char *
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str_ascii_fit_to_term (const char *text, int width, align_crt_t just_mode)
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{
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static char result[BUF_MEDIUM];
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char *actual;
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size_t remain;
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int ident = 0;
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size_t length;
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size_t pos = 0;
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length = strlen (text);
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actual = result;
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remain = sizeof (result);
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if ((int) length <= width)
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{
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switch (HIDE_FIT (just_mode))
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{
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case J_CENTER_LEFT:
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case J_CENTER:
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ident = (width - length) / 2;
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break;
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case J_RIGHT:
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ident = width - length;
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break;
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}
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/* add space before text */
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if ((int) remain <= ident)
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goto finally;
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memset (actual, ' ', ident);
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actual += ident;
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remain -= ident;
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/* copy all characters */
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for (; pos < (gsize) length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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/* add space after text */
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if (width - length - ident > 0)
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{
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if (remain <= width - length - ident)
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goto finally;
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memset (actual, ' ', width - length - ident);
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actual += width - length - ident;
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}
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}
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else if (IS_FIT (just_mode))
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{
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/* copy prefix of text, that is not wider than width / 2 */
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for (; pos + 1 <= (gsize) width / 2 && remain > 1; actual++, pos++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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if (remain <= 1)
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goto finally;
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actual[0] = '~';
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actual++;
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remain--;
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pos += length - width + 1;
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/* copy suffix of text */
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for (; pos < length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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else
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{
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switch (HIDE_FIT (just_mode))
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{
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case J_CENTER:
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ident = (length - width) / 2;
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break;
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case J_RIGHT:
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ident = length - width;
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break;
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}
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/* copy substring text, substring start from ident and take width
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* characters from text */
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pos += ident;
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for (; pos < (gsize) (ident + width) && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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finally:
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if (actual >= result + sizeof (result))
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actual = result + sizeof (result) - 1;
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actual[0] = '\0';
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return result;
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}
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static const char *
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str_ascii_term_trim (const char *text, int width)
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{
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static char result[BUF_MEDIUM];
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size_t remain;
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char *actual;
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size_t length;
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length = strlen (text);
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actual = result;
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remain = sizeof (result);
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if (width > 0)
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{
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size_t pos;
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if (width >= (int) length)
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{
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/* copy all characters */
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for (pos = 0; pos < length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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else if (width <= 3)
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{
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memset (actual, '.', width);
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actual += width;
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}
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else
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{
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memset (actual, '.', 3);
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actual += 3;
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remain -= 3;
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/* copy suffix of text */
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for (pos = length - width + 3; pos < length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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}
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actual[0] = '\0';
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return result;
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}
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static int
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str_ascii_term_width2 (const char *text, size_t length)
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{
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return (length != (size_t) (-1)) ? min (strlen (text), length) : strlen (text);
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}
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static int
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str_ascii_term_width1 (const char *text)
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{
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return str_ascii_term_width2 (text, (size_t) (-1));
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}
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static int
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str_ascii_term_char_width (const char *text)
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{
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(void) text;
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return 1;
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}
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static const char *
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str_ascii_term_substring (const char *text, int start, int width)
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{
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static char result[BUF_MEDIUM];
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size_t remain;
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char *actual;
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size_t length;
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actual = result;
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remain = sizeof (result);
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length = strlen (text);
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if (start < (int) length)
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{
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size_t pos;
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/* copy at most width characters from text from start */
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for (pos = start; pos < length && width > 0 && remain > 1;
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pos++, width--, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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/* if text is shorter then width, add space to the end */
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for (; width > 0 && remain > 1; actual++, remain--, width--)
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actual[0] = ' ';
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actual[0] = '\0';
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return result;
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}
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static const char *
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str_ascii_trunc (const char *text, int width)
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{
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static char result[MC_MAXPATHLEN];
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int remain;
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char *actual;
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size_t pos = 0;
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size_t length;
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actual = result;
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remain = sizeof (result);
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length = strlen (text);
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if ((int) length > width)
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{
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/* copy prefix of text */
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for (; pos + 1 <= (gsize) width / 2 && remain > 1; actual++, pos++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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if (remain <= 1)
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goto finally;
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actual[0] = '~';
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actual++;
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remain--;
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pos += length - width + 1;
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/* copy suffix of text */
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for (; pos < length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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else
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{
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/* copy all characters */
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for (; pos < length && remain > 1; pos++, actual++, remain--)
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{
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actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
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actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
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}
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}
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finally:
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actual[0] = '\0';
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return result;
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}
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static int
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str_ascii_offset_to_pos (const char *text, size_t length)
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{
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(void) text;
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return (int) length;
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}
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static int
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str_ascii_column_to_pos (const char *text, size_t pos)
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{
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(void) text;
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return (int) pos;
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}
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static char *
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str_ascii_create_search_needle (const char *needle, int case_sen)
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{
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(void) case_sen;
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return (char *) needle;
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}
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static void
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str_ascii_release_search_needle (char *needle, int case_sen)
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{
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(void) case_sen;
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(void) needle;
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}
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static const char *
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str_ascii_search_first (const char *text, const char *search, int case_sen)
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{
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char *fold_text;
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char *fold_search;
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const char *match;
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fold_text = (case_sen) ? (char *) text : g_ascii_strdown (text, -1);
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fold_search = (case_sen) ? (char *) search : g_ascii_strdown (search, -1);
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match = g_strstr_len (fold_text, -1, fold_search);
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if (match != NULL)
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{
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size_t offset;
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offset = match - fold_text;
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match = text + offset;
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}
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if (!case_sen)
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{
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g_free (fold_text);
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g_free (fold_search);
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}
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return match;
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}
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static const char *
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str_ascii_search_last (const char *text, const char *search, int case_sen)
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{
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char *fold_text;
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char *fold_search;
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const char *match;
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fold_text = (case_sen) ? (char *) text : g_ascii_strdown (text, -1);
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fold_search = (case_sen) ? (char *) search : g_ascii_strdown (search, -1);
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match = g_strrstr_len (fold_text, -1, fold_search);
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if (match != NULL)
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{
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size_t offset;
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offset = match - fold_text;
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match = text + offset;
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}
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if (!case_sen)
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{
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g_free (fold_text);
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g_free (fold_search);
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}
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return match;
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}
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static int
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str_ascii_compare (const char *t1, const char *t2)
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{
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return strcmp (t1, t2);
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}
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static int
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str_ascii_ncompare (const char *t1, const char *t2)
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{
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return strncmp (t1, t2, min (strlen (t1), strlen (t2)));
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}
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static int
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str_ascii_casecmp (const char *t1, const char *t2)
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{
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return g_ascii_strcasecmp (t1, t2);
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}
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static int
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str_ascii_ncasecmp (const char *t1, const char *t2)
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{
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return g_ascii_strncasecmp (t1, t2, min (strlen (t1), strlen (t2)));
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}
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static void
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str_ascii_fix_string (char *text)
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{
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for (; text[0] != '\0'; text++)
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text[0] = ((unsigned char) text[0] < 128) ? text[0] : '?';
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}
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static char *
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str_ascii_create_key (const char *text, int case_sen)
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{
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(void) case_sen;
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return (char *) text;
|
|
}
|
|
|
|
static int
|
|
str_ascii_key_collate (const char *t1, const char *t2, int case_sen)
|
|
{
|
|
return (case_sen) ? strcmp (t1, t2) : g_ascii_strcasecmp (t1, t2);
|
|
}
|
|
|
|
static void
|
|
str_ascii_release_key (char *key, int case_sen)
|
|
{
|
|
(void) key;
|
|
(void) case_sen;
|
|
}
|
|
|
|
static int
|
|
str_ascii_prefix (const char *text, const char *prefix)
|
|
{
|
|
int result;
|
|
|
|
for (result = 0; text[result] != '\0' && prefix[result] != '\0'
|
|
&& text[result] == prefix[result]; result++);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
str_ascii_caseprefix (const char *text, const char *prefix)
|
|
{
|
|
int result;
|
|
|
|
for (result = 0; text[result] != '\0' && prefix[result] != '\0'
|
|
&& g_ascii_toupper (text[result]) == g_ascii_toupper (prefix[result]); result++);
|
|
|
|
return result;
|
|
}
|
|
|
|
struct str_class
|
|
str_ascii_init (void)
|
|
{
|
|
struct str_class result;
|
|
|
|
result.conv_gerror_message = str_ascii_conv_gerror_message;
|
|
result.vfs_convert_to = str_ascii_vfs_convert_to;
|
|
result.insert_replace_char = str_ascii_insert_replace_char;
|
|
result.is_valid_string = str_ascii_is_valid_string;
|
|
result.is_valid_char = str_ascii_is_valid_char;
|
|
result.cnext_char = str_ascii_cnext_char;
|
|
result.cprev_char = str_ascii_cprev_char;
|
|
result.cnext_char_safe = str_ascii_cnext_char;
|
|
result.cprev_char_safe = str_ascii_cprev_char;
|
|
result.cnext_noncomb_char = str_ascii_cnext_noncomb_char;
|
|
result.cprev_noncomb_char = str_ascii_cprev_noncomb_char;
|
|
result.char_isspace = str_ascii_isspace;
|
|
result.char_ispunct = str_ascii_ispunct;
|
|
result.char_isalnum = str_ascii_isalnum;
|
|
result.char_isdigit = str_ascii_isdigit;
|
|
result.char_isprint = str_ascii_isprint;
|
|
result.char_iscombiningmark = str_ascii_iscombiningmark;
|
|
result.char_toupper = str_ascii_toupper;
|
|
result.char_tolower = str_ascii_tolower;
|
|
result.length = str_ascii_length;
|
|
result.length2 = str_ascii_length2;
|
|
result.length_noncomb = str_ascii_length;
|
|
result.fix_string = str_ascii_fix_string;
|
|
result.term_form = str_ascii_term_form;
|
|
result.fit_to_term = str_ascii_fit_to_term;
|
|
result.term_trim = str_ascii_term_trim;
|
|
result.term_width2 = str_ascii_term_width2;
|
|
result.term_width1 = str_ascii_term_width1;
|
|
result.term_char_width = str_ascii_term_char_width;
|
|
result.term_substring = str_ascii_term_substring;
|
|
result.trunc = str_ascii_trunc;
|
|
result.offset_to_pos = str_ascii_offset_to_pos;
|
|
result.column_to_pos = str_ascii_column_to_pos;
|
|
result.create_search_needle = str_ascii_create_search_needle;
|
|
result.release_search_needle = str_ascii_release_search_needle;
|
|
result.search_first = str_ascii_search_first;
|
|
result.search_last = str_ascii_search_last;
|
|
result.compare = str_ascii_compare;
|
|
result.ncompare = str_ascii_ncompare;
|
|
result.casecmp = str_ascii_casecmp;
|
|
result.ncasecmp = str_ascii_ncasecmp;
|
|
result.prefix = str_ascii_prefix;
|
|
result.caseprefix = str_ascii_caseprefix;
|
|
result.create_key = str_ascii_create_key;
|
|
result.create_key_for_filename = str_ascii_create_key;
|
|
result.key_collate = str_ascii_key_collate;
|
|
result.release_key = str_ascii_release_key;
|
|
|
|
return result;
|
|
}
|