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

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)
{
        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;

        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 (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 (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 (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;
                        }

                        tag_start_pos = -1;
                        tag_name_pos = -1;
                        new_line = 1;
                        line_width = 0;
                }
                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)
                        {
                                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 = -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 (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';

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