lbbs/src/lml.c

/***************************************************************************
                                                        lml.h  -  description
                                                         -------------------
        Copyright            : (C) 2004-2025 by Leaflet
        Email                : leaflet@leafok.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "common.h"
#include "lml.h"
#include "log.h"
#include "str_process.h"
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <sys/param.h>

#define LML_TAG_PARAM_BUF_LEN 256
#define LML_TAG_OUTPUT_BUF_LEN 1024

clock_t lml_total_exec_duration = 0;

typedef int (*lml_tag_filter_cb)(const char *tag_name, const char *tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode);

static int lml_tag_color_filter(const char *tag_name, const char *tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode)
{
        if (strcasecmp(tag_name, "color") == 0)
        {
                if (strcasecmp(tag_param_buf, "red") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;31m");
                }
                else if (strcasecmp(tag_param_buf, "green") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;32m");
                }
                else if (strcasecmp(tag_param_buf, "yellow") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;33m");
                }
                else if (strcasecmp(tag_param_buf, "blue") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;34m");
                }
                else if (strcasecmp(tag_param_buf, "magenta") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;35m");
                }
                else if (strcasecmp(tag_param_buf, "cyan") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;36m");
                }
                else if (strcasecmp(tag_param_buf, "black") == 0)
                {
                        return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;30;47m");
                }
        }
        return 0;
}

#define LML_TAG_QUOTE_MAX_LEVEL 10

static const char *lml_tag_quote_color[] = {
        "\033[33m", // yellow
        "\033[32m", // green
        "\033[35m", // magenta
};

static const int LML_TAG_QUOTE_LEVEL_LOOP = (int)(sizeof(lml_tag_quote_color) / sizeof(const char *));

static int lml_tag_quote_level = 0;

static int lml_tag_quote_filter(const char *tag_name, const char *tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode)
{
        if (strcasecmp(tag_name, "quote") == 0)
        {
                if (lml_tag_quote_level <= LML_TAG_QUOTE_MAX_LEVEL)
                {
                        lml_tag_quote_level++;
                }
                return snprintf(tag_output_buf, tag_output_buf_len, "%s",
                                                lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP]);
        }
        else if (strcasecmp(tag_name, "/quote") == 0)
        {
                if (lml_tag_quote_level > 0)
                {
                        lml_tag_quote_level--;
                }
                return snprintf(tag_output_buf, tag_output_buf_len, "%s",
                                                (lml_tag_quote_level > 0 ? lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP] : "\033[m"));
        }

        return 0;
}

static int lml_tag_disabled = 0;

static int lml_tag_disable_filter(const char *tag_name, const char *tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode)
{
        lml_tag_disabled = 1;

        return snprintf(tag_output_buf, tag_output_buf_len, "%s", (quote_mode ? "[plain]" : ""));
}

typedef struct lml_tag_def_t
{
        const char *tag_name;                    // tag name
        const char *tag_output;                  // output string
        const char *default_param;               // default param string
        const char *quote_mode_output;   // output string in quote mode
        lml_tag_filter_cb tag_filter_cb; // tag filter callback
} LML_TAG_DEF;

const LML_TAG_DEF lml_tag_def[] = {
        // Definition of tuple: {lml_tag, lml_output, default_param, quote_mode_output, lml_filter_cb}
        {"plain", NULL, NULL, NULL, lml_tag_disable_filter},
        {"nolml", "", NULL, "", NULL}, // deprecated
        {"lml", "", NULL, "", NULL},   // deprecated
        {"align", "", "", "", NULL},   // N/A
        {"/align", "", "", "", NULL},  // N/A
        {"size", "", "", "", NULL},        // N/A
        {"/size", "", "", "", NULL},   // N/A
        {"left", "[", "", "[left]", NULL},
        {"right", "]", "", "[right]", NULL},
        {"bold", "\033[1m", "", "", NULL}, // does not work in Fterm
        {"/bold", "\033[22m", NULL, "", NULL},
        {"b", "\033[1m", "", "", NULL},
        {"/b", "\033[22m", NULL, "", NULL},
        {"italic", "\033[5m", "", "", NULL},   // use blink instead
        {"/italic", "\033[m", NULL, "", NULL}, // \033[25m does not work in Fterm
        {"i", "\033[5m", "", "", NULL},
        {"/i", "\033[m", NULL, "", NULL},
        {"underline", "\033[4m", "", "", NULL},
        {"/underline", "\033[m", NULL, "", NULL}, // \033[24m does not work in Fterm
        {"u", "\033[4m", "", "", NULL},
        {"/u", "\033[m", NULL, "", NULL},
        {"color", NULL, NULL, "", lml_tag_color_filter},
        {"/color", "\033[m", NULL, "", NULL},
        {"quote", NULL, NULL, "", lml_tag_quote_filter},
        {"/quote", NULL, NULL, "", lml_tag_quote_filter},
        {"url", "", "", "", NULL},
        {"/url", "（链接: %s）", NULL, "", NULL},
        {"link", "", "", "", NULL},
        {"/link", "（链接: %s）", NULL, "", NULL},
        {"email", "", "", "", NULL},
        {"/email", "（Email: %s）", NULL, "", NULL},
        {"user", "", "", "", NULL},
        {"/user", "（用户: %s）", NULL, "", NULL},
        {"article", "", "", "", NULL},
        {"/article", "（文章: %s）", NULL, "", NULL},
        {"image", "（图片: %s）", "", "%s", NULL},
        {"flash", "（Flash: %s）", "", "", NULL},
        {"bwf", "\033[1;31m****\033[m", "", "****", NULL},
};

#define LML_TAG_COUNT (sizeof(lml_tag_def) / sizeof(LML_TAG_DEF))

static int lml_tag_name_len[LML_TAG_COUNT];
static int lml_ready = 0;

inline static void lml_init(void)
{
        int i;

        if (!lml_ready)
        {
                for (i = 0; i < LML_TAG_COUNT; i++)
                {
                        lml_tag_name_len[i] = (int)strlen(lml_tag_def[i].tag_name);
                }

                lml_ready = 1;
        }
}

#define CHECK_AND_APPEND_OUTPUT(out_buf, out_buf_len, out_buf_offset, tag_out, tag_out_len, line_width)                             \
        {                                                                                                                               \
                if ((out_buf_offset) + (tag_out_len) >= (out_buf_len))                                                                      \
                {                                                                                                                           \
                        log_error("Buffer is not longer enough for output string %d >= %d\n", (out_buf_offset) + (tag_out_len), (out_buf_len)); \
                        out_buf[out_buf_offset] = '\0';                                                                                         \
                        return (out_buf_offset);                                                                                                \
                }                                                                                                                           \
                memcpy((out_buf) + (out_buf_offset), (tag_out), (size_t)(tag_out_len));                                                     \
                *((out_buf) + (out_buf_offset) + (size_t)(tag_out_len)) = '\0';                                                             \
                (line_width) += str_length((out_buf) + (out_buf_offset), 1);                                                                \
                (out_buf_offset) += (tag_out_len);                                                                                          \
        }

int lml_render(const char *str_in, char *str_out, int buf_len, int width, int quote_mode)
{
        clock_t clock_begin;
        clock_t clock_end;

        char c;
        char tag_param_buf[LML_TAG_PARAM_BUF_LEN];
        char tag_output_buf[LML_TAG_OUTPUT_BUF_LEN];
        int i;
        int j = 0;
        int k;
        int tag_start_pos = -1;
        int tag_name_pos = -1;
        int tag_end_pos = -1;
        int tag_param_pos = -1;
        int tag_output_len;
        int new_line = 1;
        int fb_quote_level = 0;
        int tag_name_found;
        int line_width = 0;

        clock_begin = clock();

        lml_init();

        lml_tag_disabled = 0;
        lml_tag_quote_level = 0;

        if (width <= 0)
        {
                width = INT_MAX;
        }

        for (i = 0; str_in[i] != '\0'; i++)
        {
                if (!lml_tag_disabled && new_line)
                {
                        while (str_in[i] == ':' && str_in[i + 1] == ' ') // FB2000 quote leading str
                        {
                                fb_quote_level++;
                                lml_tag_quote_level++;
                                i += 2;
                        }

                        if (!quote_mode && lml_tag_quote_level > 0)
                        {
                                tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, "%s",
                                                                                  lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP]);
                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
                        }

                        for (k = 0; k < fb_quote_level; k++)
                        {
                                tag_output_buf[k * 2] = ':';
                                tag_output_buf[k * 2 + 1] = ' ';
                        }
                        tag_output_buf[fb_quote_level * 2] = '\0';
                        tag_output_len = fb_quote_level * 2;
                        CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);

                        new_line = 0;
                }

                if (lml_tag_disabled && new_line)
                {
                        new_line = 0;
                }

                if (!quote_mode && !lml_tag_disabled && str_in[i] == '\033' && str_in[i + 1] == '[') // Escape sequence
                {
                        for (k = i + 2; isdigit(str_in[k]) || str_in[k] == ';' || str_in[k] == '?'; k++)
                                ;

                        if (str_in[k] == 'm') // valid -- copy directly
                        {
                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + i, k - i + 1, line_width);
                        }
                        else if (isalpha(str_in[k]))
                        {
                                // unsupported ANSI CSI command
                        }
                        else
                        {
                                k--;
                        }

                        i = k;
                        continue;
                }

                if (str_in[i] == '\n') // jump out of tag at end of line
                {
                        if (!lml_tag_disabled && tag_start_pos != -1) // tag is not closed
                        {
                                tag_end_pos = i - 1;
                                tag_output_len = tag_end_pos - tag_start_pos + 1;

                                if (line_width + tag_output_len > width)
                                {
                                        CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
                                        new_line = 1;
                                        line_width = 0;
                                        i--; // redo at current i
                                }
                                else
                                {
                                        CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
                                }
                        }

                        if (!lml_tag_disabled && fb_quote_level > 0)
                        {
                                lml_tag_quote_level -= fb_quote_level;

                                tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, (quote_mode ? "" : "\033[m"));
                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);

                                fb_quote_level = 0;
                        }

                        if (new_line)
                        {
                                continue;
                        }

                        tag_start_pos = -1;
                        tag_name_pos = -1;
                        new_line = 1;
                        line_width = -1;
                }
                else if (str_in[i] == '\r' || str_in[i] == '\7')
                {
                        continue; // Skip special characters
                }

                if (!lml_tag_disabled && str_in[i] == '[')
                {
                        if (tag_start_pos != -1) // tag is not closed
                        {
                                tag_end_pos = i - 1;
                                tag_output_len = tag_end_pos - tag_start_pos + 1;
                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
                        }

                        tag_start_pos = i;
                        tag_name_pos = i + 1;
                }
                else if (!lml_tag_disabled && str_in[i] == ']' && tag_name_pos >= 0)
                {
                        tag_end_pos = i;

                        // Skip space characters
                        while (str_in[tag_name_pos] == ' ')
                        {
                                tag_name_pos++;
                        }

                        for (tag_name_found = 0, k = 0; k < LML_TAG_COUNT; k++)
                        {
                                if (strncasecmp(lml_tag_def[k].tag_name, str_in + tag_name_pos, (size_t)lml_tag_name_len[k]) == 0)
                                {
                                        tag_param_pos = -1;
                                        switch (str_in[tag_name_pos + lml_tag_name_len[k]])
                                        {
                                        case ' ':
                                                tag_name_found = 1;
                                                tag_param_pos = tag_name_pos + lml_tag_name_len[k] + 1;
                                                while (str_in[tag_param_pos] == ' ')
                                                {
                                                        tag_param_pos++;
                                                }
                                                strncpy(tag_param_buf, str_in + tag_param_pos, (size_t)MIN(tag_end_pos - tag_param_pos, LML_TAG_PARAM_BUF_LEN));
                                                tag_param_buf[MIN(tag_end_pos - tag_param_pos, LML_TAG_PARAM_BUF_LEN)] = '\0';
                                        case ']':
                                                tag_name_found = 1;
                                                if (tag_param_pos == -1 && lml_tag_def[k].tag_output != NULL && lml_tag_def[k].default_param != NULL) // Apply default param if not defined
                                                {
                                                        strncpy(tag_param_buf, lml_tag_def[k].default_param, LML_TAG_PARAM_BUF_LEN - 1);
                                                        tag_param_buf[LML_TAG_PARAM_BUF_LEN - 1] = '\0';
                                                }
                                                tag_output_len = 0;
                                                if (!quote_mode)
                                                {
                                                        if (lml_tag_def[k].tag_output != NULL)
                                                        {
                                                                tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, lml_tag_def[k].tag_output, tag_param_buf);
                                                        }
                                                        else if (lml_tag_def[k].tag_filter_cb != NULL)
                                                        {
                                                                tag_output_len = lml_tag_def[k].tag_filter_cb(
                                                                        lml_tag_def[k].tag_name, tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, 0);
                                                        }
                                                }
                                                else // if (quote_mode)
                                                {
                                                        if (lml_tag_def[k].quote_mode_output != NULL)
                                                        {
                                                                tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, lml_tag_def[k].quote_mode_output, tag_param_buf);
                                                        }
                                                        else if (lml_tag_def[k].tag_filter_cb != NULL)
                                                        {
                                                                tag_output_len = lml_tag_def[k].tag_filter_cb(
                                                                        lml_tag_def[k].tag_name, tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, 1);
                                                        }
                                                }
                                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
                                                break;
                                        default: // tag_name not match
                                                continue;
                                        }
                                        break;
                                }
                        }

                        if (!tag_name_found)
                        {
                                if (line_width + 1 > width)
                                {
                                        CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
                                        new_line = 1;
                                        line_width = 0;
                                        i--; // redo at current i
                                        continue;
                                }

                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "[", 1, line_width);
                                i = tag_start_pos; // restart from tag_start_pos + 1
                                tag_start_pos = -1;
                                tag_name_pos = -1;
                                continue;
                        }

                        tag_start_pos = -1;
                        tag_name_pos = -1;
                }
                else if (lml_tag_disabled || tag_name_pos == -1) // not in LML tag
                {
                        if (line_width + (str_in[i] & 0x80 ? 2 : 1) > width)
                        {
                                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
                                new_line = 1;
                                line_width = 0;
                                i--; // redo at current i
                                continue;
                        }

                        tag_output_len = 1;
                        if (str_in[i] & 0x80) // head of multi-byte character
                        {
                                c = (str_in[i] & 0x70) << 1;
                                while (c & 0x80)
                                {
                                        if (str_in[i + tag_output_len] == '\0')
                                        {
                                                break;
                                        }
                                        tag_output_len++;
                                        c = (c & 0x7f) << 1;
                                }
                        }

                        CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + i, tag_output_len, line_width);
                        i += (tag_output_len - 1);
                }
                else // in LML tag
                {
                        // Do nothing
                }
        }

        if (!lml_tag_disabled && tag_start_pos != -1) // tag is not closed
        {
                tag_end_pos = i - 1;
                tag_output_len = tag_end_pos - tag_start_pos + 1;
                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
        }

        if (!quote_mode && !lml_tag_disabled && lml_tag_quote_level > 0)
        {
                tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, "\033[m");
                CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
        }

        str_out[j] = '\0';

        clock_end = clock();
        lml_total_exec_duration += (clock_end - clock_begin);

        return j;
}
1	sysadm	1.1	/***************************************************************************
2			lml.h - description
3			-------------------
4			Copyright : (C) 2004-2025 by Leaflet
5			Email : leaflet@leafok.com
6			***************************************************************************/
7
8			/***************************************************************************
9			* *
10			* This program is free software; you can redistribute it and/or modify *
11			* it under the terms of the GNU General Public License as published by *
12			* the Free Software Foundation; either version 3 of the License, or *
13			* (at your option) any later version. *
14			* *
15			***************************************************************************/
16
17	sysadm	1.12	#include "common.h"
18	sysadm	1.1	#include "lml.h"
19			#include "log.h"
20	sysadm	1.36	#include "str_process.h"
21	sysadm	1.37	#include <ctype.h>
22	sysadm	1.1	#include <stdio.h>
23			#include <string.h>
24			#include <sys/param.h>
25
26	sysadm	1.2	#define LML_TAG_PARAM_BUF_LEN 256
27			#define LML_TAG_OUTPUT_BUF_LEN 1024
28	sysadm	1.1
29	sysadm	1.41	clock_t lml_total_exec_duration = 0;
30
31	sysadm	1.20	typedef int (lml_tag_filter_cb)(const char tag_name, const char tag_param_buf, char tag_output_buf, size_t tag_output_buf_len, int quote_mode);
32	sysadm	1.3
33	sysadm	1.22	static int lml_tag_color_filter(const char tag_name, const char tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode)
34	sysadm	1.3	{
35			if (strcasecmp(tag_name, "color") == 0)
36			{
37			if (strcasecmp(tag_param_buf, "red") == 0)
38			{
39			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;31m");
40			}
41			else if (strcasecmp(tag_param_buf, "green") == 0)
42			{
43			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;32m");
44			}
45			else if (strcasecmp(tag_param_buf, "yellow") == 0)
46			{
47			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;33m");
48			}
49			else if (strcasecmp(tag_param_buf, "blue") == 0)
50			{
51			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;34m");
52			}
53			else if (strcasecmp(tag_param_buf, "magenta") == 0)
54			{
55			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;35m");
56			}
57			else if (strcasecmp(tag_param_buf, "cyan") == 0)
58			{
59			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;36m");
60			}
61			else if (strcasecmp(tag_param_buf, "black") == 0)
62			{
63			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;30;47m");
64			}
65			}
66			return 0;
67			}
68	sysadm	1.1
69	sysadm	1.4	#define LML_TAG_QUOTE_MAX_LEVEL 10
70
71			static const char *lml_tag_quote_color[] = {
72	sysadm	1.5	"\033[33m", // yellow
73			"\033[32m", // green
74			"\033[35m", // magenta
75	sysadm	1.4	};
76
77	sysadm	1.30	static const int LML_TAG_QUOTE_LEVEL_LOOP = (int)(sizeof(lml_tag_quote_color) / sizeof(const char *));
78
79	sysadm	1.4	static int lml_tag_quote_level = 0;
80
81	sysadm	1.20	static int lml_tag_quote_filter(const char tag_name, const char tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode)
82	sysadm	1.4	{
83			if (strcasecmp(tag_name, "quote") == 0)
84			{
85			if (lml_tag_quote_level <= LML_TAG_QUOTE_MAX_LEVEL)
86			{
87			lml_tag_quote_level++;
88			}
89	sysadm	1.14	return snprintf(tag_output_buf, tag_output_buf_len, "%s",
90			lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP]);
91	sysadm	1.4	}
92			else if (strcasecmp(tag_name, "/quote") == 0)
93			{
94			if (lml_tag_quote_level > 0)
95			{
96			lml_tag_quote_level--;
97			}
98	sysadm	1.14	return snprintf(tag_output_buf, tag_output_buf_len, "%s",
99	sysadm	1.5	(lml_tag_quote_level > 0 ? lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP] : "\033[m"));
100	sysadm	1.4	}
101
102			return 0;
103			}
104
105	sysadm	1.20	static int lml_tag_disabled = 0;
106
107			static int lml_tag_disable_filter(const char tag_name, const char tag_param_buf, char *tag_output_buf, size_t tag_output_buf_len, int quote_mode)
108			{
109			lml_tag_disabled = 1;
110
111	sysadm	1.23	return snprintf(tag_output_buf, tag_output_buf_len, "%s", (quote_mode ? "[plain]" : ""));
112	sysadm	1.20	}
113
114	sysadm	1.22	typedef struct lml_tag_def_t
115			{
116	sysadm	1.26	const char *tag_name; // tag name
117			const char *tag_output; // output string
118			const char *default_param; // default param string
119			const char *quote_mode_output; // output string in quote mode
120	sysadm	1.22	lml_tag_filter_cb tag_filter_cb; // tag filter callback
121			} LML_TAG_DEF;
122
123			const LML_TAG_DEF lml_tag_def[] = {
124			// Definition of tuple: {lml_tag, lml_output, default_param, quote_mode_output, lml_filter_cb}
125			{"plain", NULL, NULL, NULL, lml_tag_disable_filter},
126	sysadm	1.29	{"nolml", "", NULL, "", NULL}, // deprecated
127	sysadm	1.30	{"lml", "", NULL, "", NULL}, // deprecated
128			{"align", "", "", "", NULL}, // N/A
129			{"/align", "", "", "", NULL}, // N/A
130			{"size", "", "", "", NULL}, // N/A
131			{"/size", "", "", "", NULL}, // N/A
132	sysadm	1.22	{"left", "[", "", "[left]", NULL},
133			{"right", "]", "", "[right]", NULL},
134			{"bold", "\033[1m", "", "", NULL}, // does not work in Fterm
135			{"/bold", "\033[22m", NULL, "", NULL},
136			{"b", "\033[1m", "", "", NULL},
137			{"/b", "\033[22m", NULL, "", NULL},
138	sysadm	1.26	{"italic", "\033[5m", "", "", NULL}, // use blink instead
139	sysadm	1.22	{"/italic", "\033[m", NULL, "", NULL}, // \033[25m does not work in Fterm
140			{"i", "\033[5m", "", "", NULL},
141			{"/i", "\033[m", NULL, "", NULL},
142			{"underline", "\033[4m", "", "", NULL},
143			{"/underline", "\033[m", NULL, "", NULL}, // \033[24m does not work in Fterm
144			{"u", "\033[4m", "", "", NULL},
145			{"/u", "\033[m", NULL, "", NULL},
146			{"color", NULL, NULL, "", lml_tag_color_filter},
147			{"/color", "\033[m", NULL, "", NULL},
148			{"quote", NULL, NULL, "", lml_tag_quote_filter},
149			{"/quote", NULL, NULL, "", lml_tag_quote_filter},
150			{"url", "", "", "", NULL},
151			{"/url", "（链接: %s）", NULL, "", NULL},
152			{"link", "", "", "", NULL},
153			{"/link", "（链接: %s）", NULL, "", NULL},
154			{"email", "", "", "", NULL},
155			{"/email", "（Email: %s）", NULL, "", NULL},
156			{"user", "", "", "", NULL},
157			{"/user", "（用户: %s）", NULL, "", NULL},
158			{"article", "", "", "", NULL},
159			{"/article", "（文章: %s）", NULL, "", NULL},
160			{"image", "（图片: %s）", "", "%s", NULL},
161			{"flash", "（Flash: %s）", "", "", NULL},
162			{"bwf", "\033[1;31m**\033[m", "", "**", NULL},
163	sysadm	1.1	};
164
165	sysadm	1.24	#define LML_TAG_COUNT (sizeof(lml_tag_def) / sizeof(LML_TAG_DEF))
166	sysadm	1.3
167	sysadm	1.19	static int lml_tag_name_len[LML_TAG_COUNT];
168			static int lml_ready = 0;
169	sysadm	1.1
170			inline static void lml_init(void)
171			{
172			int i;
173
174	sysadm	1.19	if (!lml_ready)
175	sysadm	1.1	{
176			for (i = 0; i < LML_TAG_COUNT; i++)
177			{
178	sysadm	1.22	lml_tag_name_len[i] = (int)strlen(lml_tag_def[i].tag_name);
179	sysadm	1.1	}
180
181	sysadm	1.19	lml_ready = 1;
182	sysadm	1.1	}
183			}
184
185	sysadm	1.36	#define CHECK_AND_APPEND_OUTPUT(out_buf, out_buf_len, out_buf_offset, tag_out, tag_out_len, line_width) \
186	sysadm	1.35	{ \
187			if ((out_buf_offset) + (tag_out_len) >= (out_buf_len)) \
188			{ \
189			log_error("Buffer is not longer enough for output string %d >= %d\n", (out_buf_offset) + (tag_out_len), (out_buf_len)); \
190			out_buf[out_buf_offset] = '\0'; \
191			return (out_buf_offset); \
192			} \
193			memcpy((out_buf) + (out_buf_offset), (tag_out), (size_t)(tag_out_len)); \
194	sysadm	1.36	*((out_buf) + (out_buf_offset) + (size_t)(tag_out_len)) = '\0'; \
195			(line_width) += str_length((out_buf) + (out_buf_offset), 1); \
196	sysadm	1.35	(out_buf_offset) += (tag_out_len); \
197			}
198	sysadm	1.34
199	sysadm	1.36	int lml_render(const char str_in, char str_out, int buf_len, int width, int quote_mode)
200	sysadm	1.1	{
201	sysadm	1.41	clock_t clock_begin;
202			clock_t clock_end;
203
204	sysadm	1.13	char c;
205	sysadm	1.2	char tag_param_buf[LML_TAG_PARAM_BUF_LEN];
206	sysadm	1.1	char tag_output_buf[LML_TAG_OUTPUT_BUF_LEN];
207			int i;
208			int j = 0;
209			int k;
210			int tag_start_pos = -1;
211	sysadm	1.26	int tag_name_pos = -1;
212	sysadm	1.1	int tag_end_pos = -1;
213	sysadm	1.2	int tag_param_pos = -1;
214	sysadm	1.1	int tag_output_len;
215	sysadm	1.5	int new_line = 1;
216			int fb_quote_level = 0;
217	sysadm	1.26	int tag_name_found;
218	sysadm	1.36	int line_width = 0;
219	sysadm	1.1
220	sysadm	1.41	clock_begin = clock();
221
222	sysadm	1.1	lml_init();
223
224	sysadm	1.20	lml_tag_disabled = 0;
225	sysadm	1.4	lml_tag_quote_level = 0;
226
227	sysadm	1.36	if (width <= 0)
228			{
229			width = INT_MAX;
230			}
231
232	sysadm	1.1	for (i = 0; str_in[i] != '\0'; i++)
233			{
234	sysadm	1.36	if (!lml_tag_disabled && new_line)
235	sysadm	1.5	{
236	sysadm	1.36	while (str_in[i] == ':' && str_in[i + 1] == ' ') // FB2000 quote leading str
237	sysadm	1.5	{
238			fb_quote_level++;
239	sysadm	1.36	lml_tag_quote_level++;
240			i += 2;
241	sysadm	1.5	}
242
243	sysadm	1.36	if (!quote_mode && lml_tag_quote_level > 0)
244	sysadm	1.5	{
245	sysadm	1.14	tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, "%s",
246	sysadm	1.31	lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP]);
247	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
248	sysadm	1.5	}
249
250	sysadm	1.36	for (k = 0; k < fb_quote_level; k++)
251			{
252			tag_output_buf[k * 2] = ':';
253			tag_output_buf[k * 2 + 1] = ' ';
254			}
255			tag_output_buf[fb_quote_level * 2] = '\0';
256			tag_output_len = fb_quote_level * 2;
257			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
258
259	sysadm	1.5	new_line = 0;
260			}
261
262	sysadm	1.39	if (lml_tag_disabled && new_line)
263			{
264			new_line = 0;
265			}
266
267	sysadm	1.41	if (!quote_mode && !lml_tag_disabled && str_in[i] == '\033' && str_in[i + 1] == '[') // Escape sequence
268	sysadm	1.8	{
269	sysadm	1.37	for (k = i + 2; isdigit(str_in[k]) \|\| str_in[k] == ';' \|\| str_in[k] == '?'; k++)
270	sysadm	1.8	;
271
272	sysadm	1.37	if (str_in[k] == 'm') // valid -- copy directly
273			{
274			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + i, k - i + 1, line_width);
275			}
276			else if (isalpha(str_in[k]))
277			{
278			// unsupported ANSI CSI command
279			}
280			else
281	sysadm	1.8	{
282	sysadm	1.35	k--;
283	sysadm	1.8	}
284	sysadm	1.35
285			i = k;
286			continue;
287	sysadm	1.8	}
288
289	sysadm	1.28	if (str_in[i] == '\n') // jump out of tag at end of line
290	sysadm	1.5	{
291	sysadm	1.41	if (!lml_tag_disabled && tag_start_pos != -1) // tag is not closed
292	sysadm	1.28	{
293			tag_end_pos = i - 1;
294			tag_output_len = tag_end_pos - tag_start_pos + 1;
295	sysadm	1.38
296			if (line_width + tag_output_len > width)
297			{
298			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
299			new_line = 1;
300			line_width = 0;
301	sysadm	1.40	i--; // redo at current i
302	sysadm	1.38	}
303			else
304			{
305			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
306			}
307	sysadm	1.28	}
308
309	sysadm	1.41	if (!lml_tag_disabled && fb_quote_level > 0)
310	sysadm	1.33	{
311			lml_tag_quote_level -= fb_quote_level;
312
313	sysadm	1.36	tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, (quote_mode ? "" : "\033[m"));
314			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
315
316			fb_quote_level = 0;
317	sysadm	1.33	}
318
319	sysadm	1.38	if (new_line)
320			{
321			continue;
322			}
323
324	sysadm	1.28	tag_start_pos = -1;
325			tag_name_pos = -1;
326	sysadm	1.5	new_line = 1;
327	sysadm	1.38	line_width = -1;
328	sysadm	1.5	}
329	sysadm	1.36	else if (str_in[i] == '\r' \|\| str_in[i] == '\7')
330	sysadm	1.5	{
331	sysadm	1.36	continue; // Skip special characters
332	sysadm	1.5	}
333
334	sysadm	1.20	if (!lml_tag_disabled && str_in[i] == '[')
335	sysadm	1.1	{
336	sysadm	1.33	if (tag_start_pos != -1) // tag is not closed
337			{
338			tag_end_pos = i - 1;
339			tag_output_len = tag_end_pos - tag_start_pos + 1;
340	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
341	sysadm	1.33	}
342
343	sysadm	1.26	tag_start_pos = i;
344			tag_name_pos = i + 1;
345	sysadm	1.1	}
346	sysadm	1.32	else if (!lml_tag_disabled && str_in[i] == ']' && tag_name_pos >= 0)
347	sysadm	1.1	{
348	sysadm	1.32	tag_end_pos = i;
349
350			// Skip space characters
351			while (str_in[tag_name_pos] == ' ')
352	sysadm	1.1	{
353	sysadm	1.32	tag_name_pos++;
354			}
355	sysadm	1.1
356	sysadm	1.32	for (tag_name_found = 0, k = 0; k < LML_TAG_COUNT; k++)
357			{
358			if (strncasecmp(lml_tag_def[k].tag_name, str_in + tag_name_pos, (size_t)lml_tag_name_len[k]) == 0)
359	sysadm	1.1	{
360	sysadm	1.32	tag_param_pos = -1;
361			switch (str_in[tag_name_pos + lml_tag_name_len[k]])
362	sysadm	1.1	{
363	sysadm	1.32	case ' ':
364			tag_name_found = 1;
365			tag_param_pos = tag_name_pos + lml_tag_name_len[k] + 1;
366			while (str_in[tag_param_pos] == ' ')
367			{
368			tag_param_pos++;
369			}
370			strncpy(tag_param_buf, str_in + tag_param_pos, (size_t)MIN(tag_end_pos - tag_param_pos, LML_TAG_PARAM_BUF_LEN));
371			tag_param_buf[MIN(tag_end_pos - tag_param_pos, LML_TAG_PARAM_BUF_LEN)] = '\0';
372			case ']':
373			tag_name_found = 1;
374			if (tag_param_pos == -1 && lml_tag_def[k].tag_output != NULL && lml_tag_def[k].default_param != NULL) // Apply default param if not defined
375			{
376			strncpy(tag_param_buf, lml_tag_def[k].default_param, LML_TAG_PARAM_BUF_LEN - 1);
377			tag_param_buf[LML_TAG_PARAM_BUF_LEN - 1] = '\0';
378			}
379	sysadm	1.34	tag_output_len = 0;
380	sysadm	1.32	if (!quote_mode)
381			{
382			if (lml_tag_def[k].tag_output != NULL)
383			{
384			tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, lml_tag_def[k].tag_output, tag_param_buf);
385			}
386			else if (lml_tag_def[k].tag_filter_cb != NULL)
387			{
388			tag_output_len = lml_tag_def[k].tag_filter_cb(
389			lml_tag_def[k].tag_name, tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, 0);
390			}
391			}
392			else // if (quote_mode)
393	sysadm	1.1	{
394	sysadm	1.32	if (lml_tag_def[k].quote_mode_output != NULL)
395			{
396			tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, lml_tag_def[k].quote_mode_output, tag_param_buf);
397			}
398			else if (lml_tag_def[k].tag_filter_cb != NULL)
399			{
400			tag_output_len = lml_tag_def[k].tag_filter_cb(
401			lml_tag_def[k].tag_name, tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, 1);
402			}
403	sysadm	1.1	}
404	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
405	sysadm	1.1	break;
406	sysadm	1.32	default: // tag_name not match
407			continue;
408	sysadm	1.1	}
409	sysadm	1.32	break;
410	sysadm	1.1	}
411	sysadm	1.32	}
412	sysadm	1.1
413	sysadm	1.32	if (!tag_name_found)
414			{
415	sysadm	1.40	if (line_width + 1 > width)
416	sysadm	1.38	{
417			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
418			new_line = 1;
419			line_width = 0;
420	sysadm	1.40	i--; // redo at current i
421	sysadm	1.38	continue;
422			}
423
424	sysadm	1.40	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "[", 1, line_width);
425			i = tag_start_pos; // restart from tag_start_pos + 1
426			tag_start_pos = -1;
427			tag_name_pos = -1;
428			continue;
429	sysadm	1.1	}
430	sysadm	1.32
431			tag_start_pos = -1;
432			tag_name_pos = -1;
433	sysadm	1.1	}
434	sysadm	1.26	else if (lml_tag_disabled \|\| tag_name_pos == -1) // not in LML tag
435	sysadm	1.1	{
436	sysadm	1.36	if (line_width + (str_in[i] & 0x80 ? 2 : 1) > width)
437			{
438			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
439			new_line = 1;
440			line_width = 0;
441	sysadm	1.40	i--; // redo at current i
442	sysadm	1.36	continue;
443			}
444
445			tag_output_len = 1;
446	sysadm	1.22	if (str_in[i] & 0x80) // head of multi-byte character
447	sysadm	1.1	{
448	sysadm	1.22	c = (str_in[i] & 0x70) << 1;
449			while (c & 0x80)
450	sysadm	1.1	{
451	sysadm	1.36	if (str_in[i + tag_output_len] == '\0')
452	sysadm	1.13	{
453	sysadm	1.36	break;
454	sysadm	1.13	}
455	sysadm	1.36	tag_output_len++;
456	sysadm	1.22	c = (c & 0x7f) << 1;
457	sysadm	1.1	}
458			}
459
460	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + i, tag_output_len, line_width);
461			i += (tag_output_len - 1);
462	sysadm	1.1	}
463			else // in LML tag
464			{
465			// Do nothing
466			}
467			}
468
469	sysadm	1.41	if (!lml_tag_disabled && tag_start_pos != -1) // tag is not closed
470	sysadm	1.26	{
471			tag_end_pos = i - 1;
472			tag_output_len = tag_end_pos - tag_start_pos + 1;
473	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
474	sysadm	1.26	}
475
476	sysadm	1.23	if (!quote_mode && !lml_tag_disabled && lml_tag_quote_level > 0)
477	sysadm	1.5	{
478			tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, "\033[m");
479	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
480	sysadm	1.5	}
481
482	sysadm	1.1	str_out[j] = '\0';
483
484	sysadm	1.41	clock_end = clock();
485			lml_total_exec_duration += (clock_end - clock_begin);
486
487	sysadm	1.1	return j;
488	sysadm	1.5	}
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