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/*************************************************************************** |
/* SPDX-License-Identifier: GPL-3.0-or-later */ |
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str_process.c - description |
/* |
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------------------- |
* str_process |
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Copyright : (C) 2004-2025 by Leaflet |
* - common string processing features with UTF-8 support |
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Email : leaflet@leafok.com |
* |
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***************************************************************************/ |
* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com> |
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*/ |
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/*************************************************************************** |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 3 of the License, or * |
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* (at your option) any later version. * |
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* * |
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***************************************************************************/ |
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#include "common.h" |
#include "common.h" |
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#include "log.h" |
#include "log.h" |
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#include "str_process.h" |
#include "str_process.h" |
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#include <ctype.h> |
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#include <stdio.h> |
#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
#include <string.h> |
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#include <wchar.h> |
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int UTF8_fixed_width = 1; |
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int str_length(const char *str, int skip_ctrl_seq) |
int str_length(const char *str, int skip_ctrl_seq) |
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{ |
{ |
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int str_len; |
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char input_str[5]; |
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wchar_t wcs[2]; |
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int wc_len; |
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int i; |
int i; |
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char c; |
char c; |
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int ret = 0; |
int ret = 0; |
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if (skip_ctrl_seq && c == '\033' && str[i + 1] == '[') // Skip control sequence |
if (skip_ctrl_seq && c == '\033' && str[i + 1] == '[') // Skip control sequence |
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{ |
{ |
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i += 2; |
for (i = i + 2; isdigit(str[i]) || str[i] == ';' || str[i] == '?'; i++) |
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while (str[i] != '\0' && str[i] != 'm') |
; |
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if (str[i] == 'm') // valid |
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{ |
{ |
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i++; |
// skip |
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} |
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else if (isalpha(str[i])) |
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{ |
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// unsupported ANSI CSI command |
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} |
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else |
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{ |
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i--; |
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} |
} |
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continue; |
continue; |
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} |
} |
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// Process UTF-8 Chinese characters |
// Process UTF-8 Chinese characters |
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if (c & 0x80) // head of multi-byte character |
if (c & 0x80) // head of multi-byte character |
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{ |
{ |
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c = (c & 0x70) << 1; |
str_len = 0; |
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c = (char)(c & 0xf0); |
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while (c & 0x80) |
while (c & 0x80) |
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{ |
{ |
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i++; |
input_str[str_len] = str[i + str_len]; |
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str_len++; |
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c = (c & 0x7f) << 1; |
c = (c & 0x7f) << 1; |
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} |
} |
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input_str[str_len] = '\0'; |
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ret += 2; |
if (mbstowcs(wcs, input_str, 1) == (size_t)-1) |
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{ |
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#ifdef _DEBUG |
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log_error("mbstowcs(%s) error\n", input_str); |
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#endif |
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wc_len = (UTF8_fixed_width ? 2 : 1); // Fallback |
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} |
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else |
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{ |
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wc_len = (UTF8_fixed_width ? 2 : wcwidth(wcs[0])); |
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} |
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i += (str_len - 1); |
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ret += wc_len; |
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} |
} |
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else |
else |
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{ |
{ |
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*p_eol = 0; |
*p_eol = 0; |
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*p_display_len = 0; |
*p_display_len = 0; |
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char c; |
char c; |
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int str_len; |
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char input_str[5]; |
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wchar_t wcs[2]; |
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int wc_len; |
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for (i = 0; buffer[i] != '\0'; i++) |
for (i = 0; buffer[i] != '\0'; i++) |
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{ |
{ |
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if (c & 0x80) // head of multi-byte character |
if (c & 0x80) // head of multi-byte character |
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{ |
{ |
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if (*p_display_len + 2 > max_display_len) |
str_len = 0; |
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c = (char)(c & 0xf0); |
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while (c & 0x80) |
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{ |
{ |
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break; |
input_str[str_len] = buffer[i + str_len]; |
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str_len++; |
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c = (c & 0x7f) << 1; |
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} |
} |
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input_str[str_len] = '\0'; |
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c = (c & 0x70) << 1; |
if (mbstowcs(wcs, input_str, 1) == (size_t)-1) |
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while (c & 0x80) |
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{ |
{ |
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i++; |
#ifdef _DEBUG |
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c = (c & 0x7f) << 1; |
log_error("mbstowcs(%s) error\n", input_str); |
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#endif |
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wc_len = (UTF8_fixed_width ? 2 : 1); // Fallback |
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} |
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else |
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{ |
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wc_len = (UTF8_fixed_width ? 2 : wcwidth(wcs[0])); |
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} |
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if (*p_display_len + wc_len > max_display_len) |
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{ |
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break; |
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} |
} |
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(*p_display_len) += 2; |
i += (str_len - 1); |
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(*p_display_len) += wc_len; |
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} |
} |
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else |
else |
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{ |
{ |
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p_line_offsets[line_cnt + 1] = p_line_offsets[line_cnt] + len; |
p_line_offsets[line_cnt + 1] = p_line_offsets[line_cnt] + len; |
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line_cnt++; |
line_cnt++; |
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p_buf += len; |
p_buf += len; |
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} while (p_buf[0] != '\0'); |
} while (p_buf[0] != '\0' || end_of_line); |
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return line_cnt; |
return line_cnt; |
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} |
} |