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-rw-r--r--lib/strutil/strutilascii.c785
1 files changed, 785 insertions, 0 deletions
diff --git a/lib/strutil/strutilascii.c b/lib/strutil/strutilascii.c
new file mode 100644
index 0000000..421bfdb
--- /dev/null
+++ b/lib/strutil/strutilascii.c
@@ -0,0 +1,785 @@
+/*
+ ASCII strings utilities
+
+ Copyright (C) 2007-2023
+ 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+#include <stdlib.h>
+
+#include "lib/global.h"
+#include "lib/strutil.h"
+
+/* using g_ascii function from glib
+ * on terminal are showed only ascii characters (lower than 0x80)
+ */
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** forward declarations (file scope functions) *************************************************/
+
+/*** file scope variables ************************************************************************/
+
+static const char replch = '?';
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+str_ascii_insert_replace_char (GString * buffer)
+{
+ g_string_append_c (buffer, replch);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_is_valid_string (const char *text)
+{
+ (void) text;
+ return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_is_valid_char (const char *ch, size_t size)
+{
+ (void) ch;
+ (void) size;
+ return 1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+str_ascii_cnext_char (const char **text)
+{
+ (*text)++;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+str_ascii_cprev_char (const char **text)
+{
+ (*text)--;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_cnext_noncomb_char (const char **text)
+{
+ if (*text[0] == '\0')
+ return 0;
+
+ (*text)++;
+ return 1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_cprev_noncomb_char (const char **text, const char *begin)
+{
+ if ((*text) == begin)
+ return 0;
+
+ (*text)--;
+ return 1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_isspace (const char *text)
+{
+ return g_ascii_isspace ((gchar) text[0]);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_ispunct (const char *text)
+{
+ return g_ascii_ispunct ((gchar) text[0]);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_isalnum (const char *text)
+{
+ return g_ascii_isalnum ((gchar) text[0]);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_isdigit (const char *text)
+{
+ return g_ascii_isdigit ((gchar) text[0]);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_isprint (const char *text)
+{
+ return g_ascii_isprint ((gchar) text[0]);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_iscombiningmark (const char *text)
+{
+ (void) text;
+ return FALSE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_toupper (const char *text, char **out, size_t * remain)
+{
+ if (*remain <= 1)
+ return FALSE;
+
+ (*out)[0] = (char) g_ascii_toupper ((gchar) text[0]);
+ (*out)++;
+ (*remain)--;
+ return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+str_ascii_tolower (const char *text, char **out, size_t * remain)
+{
+ if (*remain <= 1)
+ return FALSE;
+
+ (*out)[0] = (char) g_ascii_tolower ((gchar) text[0]);
+ (*out)++;
+ (*remain)--;
+ return TRUE;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_length (const char *text)
+{
+ return strlen (text);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_length2 (const char *text, int size)
+{
+ return (size >= 0) ? MIN (strlen (text), (gsize) size) : strlen (text);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gchar *
+str_ascii_conv_gerror_message (GError * mcerror, const char *def_msg)
+{
+ /* the same as str_utf8_conv_gerror_message() */
+ if (mcerror != NULL)
+ return g_strdup (mcerror->message);
+
+ return g_strdup (def_msg != NULL ? def_msg : "");
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static estr_t
+str_ascii_vfs_convert_to (GIConv coder, const char *string, int size, GString * buffer)
+{
+ (void) coder;
+ g_string_append_len (buffer, string, size);
+ return ESTR_SUCCESS;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_term_form (const char *text)
+{
+ static char result[BUF_MEDIUM];
+ char *actual;
+ size_t remain;
+ size_t length;
+ size_t pos = 0;
+
+ actual = result;
+ remain = sizeof (result);
+ length = strlen (text);
+
+ /* go throw all characters and check, if they are ascii and printable */
+ for (; pos < length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+
+ actual[0] = '\0';
+ return result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_fit_to_term (const char *text, int width, align_crt_t just_mode)
+{
+ static char result[BUF_MEDIUM];
+ char *actual;
+ size_t remain;
+ int ident = 0;
+ size_t length;
+ size_t pos = 0;
+
+ length = strlen (text);
+ actual = result;
+ remain = sizeof (result);
+
+ if ((int) length <= width)
+ {
+ switch (HIDE_FIT (just_mode))
+ {
+ case J_CENTER_LEFT:
+ case J_CENTER:
+ ident = (width - length) / 2;
+ break;
+ case J_RIGHT:
+ ident = width - length;
+ break;
+ default:
+ break;
+ }
+
+ /* add space before text */
+ if ((int) remain <= ident)
+ goto finally;
+ memset (actual, ' ', ident);
+ actual += ident;
+ remain -= ident;
+
+ /* copy all characters */
+ for (; pos < (gsize) length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+
+ /* add space after text */
+ if (width - length - ident > 0)
+ {
+ if (remain <= width - length - ident)
+ goto finally;
+ memset (actual, ' ', width - length - ident);
+ actual += width - length - ident;
+ }
+ }
+ else if (IS_FIT (just_mode))
+ {
+ /* copy prefix of text, that is not wider than width / 2 */
+ for (; pos + 1 <= (gsize) width / 2 && remain > 1; actual++, pos++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+
+ if (remain <= 1)
+ goto finally;
+ actual[0] = '~';
+ actual++;
+ remain--;
+
+ pos += length - width + 1;
+
+ /* copy suffix of text */
+ for (; pos < length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+ }
+ else
+ {
+ switch (HIDE_FIT (just_mode))
+ {
+ case J_CENTER:
+ ident = (length - width) / 2;
+ break;
+ case J_RIGHT:
+ ident = length - width;
+ break;
+ default:
+ break;
+ }
+
+ /* copy substring text, substring start from ident and take width
+ * characters from text */
+ pos += ident;
+ for (; pos < (gsize) (ident + width) && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+
+ }
+
+ finally:
+ if (actual >= result + sizeof (result))
+ actual = result + sizeof (result) - 1;
+ actual[0] = '\0';
+ return result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_term_trim (const char *text, int width)
+{
+ static char result[BUF_MEDIUM];
+ size_t remain;
+ char *actual;
+ size_t length;
+
+ length = strlen (text);
+ actual = result;
+ remain = sizeof (result);
+
+ if (width > 0)
+ {
+ size_t pos;
+
+ if (width >= (int) length)
+ {
+ /* copy all characters */
+ for (pos = 0; pos < length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+ }
+ else if (width <= 3)
+ {
+ memset (actual, '.', width);
+ actual += width;
+ }
+ else
+ {
+ memset (actual, '.', 3);
+ actual += 3;
+ remain -= 3;
+
+ /* copy suffix of text */
+ for (pos = length - width + 3; pos < length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+ }
+ }
+
+ actual[0] = '\0';
+ return result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_term_width2 (const char *text, size_t length)
+{
+ return (length != (size_t) (-1)) ? MIN (strlen (text), length) : strlen (text);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_term_width1 (const char *text)
+{
+ return str_ascii_term_width2 (text, (size_t) (-1));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_term_char_width (const char *text)
+{
+ (void) text;
+ return 1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_term_substring (const char *text, int start, int width)
+{
+ static char result[BUF_MEDIUM];
+ size_t remain;
+ char *actual;
+ size_t length;
+
+ actual = result;
+ remain = sizeof (result);
+ length = strlen (text);
+
+ if (start < (int) length)
+ {
+ size_t pos;
+
+ /* copy at most width characters from text from start */
+ for (pos = start; pos < length && width > 0 && remain > 1;
+ pos++, width--, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+ }
+
+ /* if text is shorter then width, add space to the end */
+ for (; width > 0 && remain > 1; actual++, remain--, width--)
+ actual[0] = ' ';
+
+ actual[0] = '\0';
+ return result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_trunc (const char *text, int width)
+{
+ static char result[MC_MAXPATHLEN];
+ int remain;
+ char *actual;
+ size_t pos = 0;
+ size_t length;
+
+ actual = result;
+ remain = sizeof (result);
+ length = strlen (text);
+
+ if ((int) length > width)
+ {
+ /* copy prefix of text */
+ for (; pos + 1 <= (gsize) width / 2 && remain > 1; actual++, pos++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+
+ if (remain <= 1)
+ goto finally;
+ actual[0] = '~';
+ actual++;
+ remain--;
+
+ pos += length - width + 1;
+
+ /* copy suffix of text */
+ for (; pos < length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+ }
+ else
+ {
+ /* copy all characters */
+ for (; pos < length && remain > 1; pos++, actual++, remain--)
+ {
+ actual[0] = isascii ((unsigned char) text[pos]) ? text[pos] : '?';
+ actual[0] = g_ascii_isprint ((gchar) actual[0]) ? actual[0] : '.';
+ }
+ }
+
+ finally:
+ actual[0] = '\0';
+ return result;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_offset_to_pos (const char *text, size_t length)
+{
+ (void) text;
+ return (int) length;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_column_to_pos (const char *text, size_t pos)
+{
+ (void) text;
+ return (int) pos;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static char *
+str_ascii_create_search_needle (const char *needle, gboolean case_sen)
+{
+ (void) case_sen;
+ return (char *) needle;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+str_ascii_release_search_needle (char *needle, gboolean case_sen)
+{
+ (void) case_sen;
+ (void) needle;
+
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_search_first (const char *text, const char *search, gboolean case_sen)
+{
+ char *fold_text;
+ char *fold_search;
+ const char *match;
+
+ fold_text = case_sen ? (char *) text : g_ascii_strdown (text, -1);
+ fold_search = case_sen ? (char *) search : g_ascii_strdown (search, -1);
+
+ match = g_strstr_len (fold_text, -1, fold_search);
+ if (match != NULL)
+ {
+ size_t offset;
+
+ offset = match - fold_text;
+ match = text + offset;
+ }
+
+ if (!case_sen)
+ {
+ g_free (fold_text);
+ g_free (fold_search);
+ }
+
+ return match;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static const char *
+str_ascii_search_last (const char *text, const char *search, gboolean case_sen)
+{
+ char *fold_text;
+ char *fold_search;
+ const char *match;
+
+ fold_text = case_sen ? (char *) text : g_ascii_strdown (text, -1);
+ fold_search = case_sen ? (char *) search : g_ascii_strdown (search, -1);
+
+ match = g_strrstr_len (fold_text, -1, fold_search);
+ if (match != NULL)
+ {
+ size_t offset;
+
+ offset = match - fold_text;
+ match = text + offset;
+ }
+
+ if (!case_sen)
+ {
+ g_free (fold_text);
+ g_free (fold_search);
+ }
+
+ return match;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_compare (const char *t1, const char *t2)
+{
+ return strcmp (t1, t2);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_ncompare (const char *t1, const char *t2)
+{
+ return strncmp (t1, t2, MIN (strlen (t1), strlen (t2)));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_casecmp (const char *t1, const char *t2)
+{
+ return g_ascii_strcasecmp (t1, t2);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_ncasecmp (const char *t1, const char *t2)
+{
+ return g_ascii_strncasecmp (t1, t2, MIN (strlen (t1), strlen (t2)));
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+str_ascii_fix_string (char *text)
+{
+ for (; text[0] != '\0'; text++)
+ text[0] = ((unsigned char) text[0] < 128) ? text[0] : '?';
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static char *
+str_ascii_create_key (const char *text, gboolean case_sen)
+{
+ (void) case_sen;
+ return (char *) text;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+str_ascii_key_collate (const char *t1, const char *t2, gboolean case_sen)
+{
+ return case_sen ? strcmp (t1, t2) : g_ascii_strcasecmp (t1, t2);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+str_ascii_release_key (char *key, gboolean 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;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+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;
+}
+
+/* --------------------------------------------------------------------------------------------- */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-21 12:30:03 +0000