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 <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 -- copy directly
                {
                        for (k = i + 2; str_in[k] != '\0' && str_in[k] != 'm' && str_in[k] != '\033'; k++)
                                ;

                        if (str_in[k] != 'm') // invalid
                        {
                                k--;
                        }

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