lbbs/src/lml.c

/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * lml
 *   - LML render
 *
 * Copyright (C) 2004-2025 by Leaflet <leaflet@leafok.com>
 */

#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	1.42	/* SPDX-License-Identifier: GPL-3.0-or-later */
2			/*
3			* lml
4			* - LML render
5			*
6			* Copyright (C) 2004-2025 by Leaflet <leaflet@leafok.com>
7			*/
8	sysadm	1.1
9	sysadm	1.12	#include "common.h"
10	sysadm	1.1	#include "lml.h"
11			#include "log.h"
12	sysadm	1.36	#include "str_process.h"
13	sysadm	1.37	#include <ctype.h>
14	sysadm	1.1	#include <stdio.h>
15			#include <string.h>
16			#include <sys/param.h>
17
18	sysadm	1.2	#define LML_TAG_PARAM_BUF_LEN 256
19			#define LML_TAG_OUTPUT_BUF_LEN 1024
20	sysadm	1.1
21	sysadm	1.41	clock_t lml_total_exec_duration = 0;
22
23	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);
24	sysadm	1.3
25	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)
26	sysadm	1.3	{
27			if (strcasecmp(tag_name, "color") == 0)
28			{
29			if (strcasecmp(tag_param_buf, "red") == 0)
30			{
31			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;31m");
32			}
33			else if (strcasecmp(tag_param_buf, "green") == 0)
34			{
35			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;32m");
36			}
37			else if (strcasecmp(tag_param_buf, "yellow") == 0)
38			{
39			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;33m");
40			}
41			else if (strcasecmp(tag_param_buf, "blue") == 0)
42			{
43			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;34m");
44			}
45			else if (strcasecmp(tag_param_buf, "magenta") == 0)
46			{
47			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;35m");
48			}
49			else if (strcasecmp(tag_param_buf, "cyan") == 0)
50			{
51			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;36m");
52			}
53			else if (strcasecmp(tag_param_buf, "black") == 0)
54			{
55			return snprintf(tag_output_buf, tag_output_buf_len, "\033[1;30;47m");
56			}
57			}
58			return 0;
59			}
60	sysadm	1.1
61	sysadm	1.4	#define LML_TAG_QUOTE_MAX_LEVEL 10
62
63			static const char *lml_tag_quote_color[] = {
64	sysadm	1.5	"\033[33m", // yellow
65			"\033[32m", // green
66			"\033[35m", // magenta
67	sysadm	1.4	};
68
69	sysadm	1.30	static const int LML_TAG_QUOTE_LEVEL_LOOP = (int)(sizeof(lml_tag_quote_color) / sizeof(const char *));
70
71	sysadm	1.4	static int lml_tag_quote_level = 0;
72
73	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)
74	sysadm	1.4	{
75			if (strcasecmp(tag_name, "quote") == 0)
76			{
77			if (lml_tag_quote_level <= LML_TAG_QUOTE_MAX_LEVEL)
78			{
79			lml_tag_quote_level++;
80			}
81	sysadm	1.14	return snprintf(tag_output_buf, tag_output_buf_len, "%s",
82			lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP]);
83	sysadm	1.4	}
84			else if (strcasecmp(tag_name, "/quote") == 0)
85			{
86			if (lml_tag_quote_level > 0)
87			{
88			lml_tag_quote_level--;
89			}
90	sysadm	1.14	return snprintf(tag_output_buf, tag_output_buf_len, "%s",
91	sysadm	1.5	(lml_tag_quote_level > 0 ? lml_tag_quote_color[lml_tag_quote_level % LML_TAG_QUOTE_LEVEL_LOOP] : "\033[m"));
92	sysadm	1.4	}
93
94			return 0;
95			}
96
97	sysadm	1.20	static int lml_tag_disabled = 0;
98
99			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)
100			{
101			lml_tag_disabled = 1;
102
103	sysadm	1.23	return snprintf(tag_output_buf, tag_output_buf_len, "%s", (quote_mode ? "[plain]" : ""));
104	sysadm	1.20	}
105
106	sysadm	1.22	typedef struct lml_tag_def_t
107			{
108	sysadm	1.26	const char *tag_name; // tag name
109			const char *tag_output; // output string
110			const char *default_param; // default param string
111			const char *quote_mode_output; // output string in quote mode
112	sysadm	1.22	lml_tag_filter_cb tag_filter_cb; // tag filter callback
113			} LML_TAG_DEF;
114
115			const LML_TAG_DEF lml_tag_def[] = {
116			// Definition of tuple: {lml_tag, lml_output, default_param, quote_mode_output, lml_filter_cb}
117			{"plain", NULL, NULL, NULL, lml_tag_disable_filter},
118	sysadm	1.29	{"nolml", "", NULL, "", NULL}, // deprecated
119	sysadm	1.30	{"lml", "", NULL, "", NULL}, // deprecated
120			{"align", "", "", "", NULL}, // N/A
121			{"/align", "", "", "", NULL}, // N/A
122			{"size", "", "", "", NULL}, // N/A
123			{"/size", "", "", "", NULL}, // N/A
124	sysadm	1.22	{"left", "[", "", "[left]", NULL},
125			{"right", "]", "", "[right]", NULL},
126			{"bold", "\033[1m", "", "", NULL}, // does not work in Fterm
127			{"/bold", "\033[22m", NULL, "", NULL},
128			{"b", "\033[1m", "", "", NULL},
129			{"/b", "\033[22m", NULL, "", NULL},
130	sysadm	1.26	{"italic", "\033[5m", "", "", NULL}, // use blink instead
131	sysadm	1.22	{"/italic", "\033[m", NULL, "", NULL}, // \033[25m does not work in Fterm
132			{"i", "\033[5m", "", "", NULL},
133			{"/i", "\033[m", NULL, "", NULL},
134			{"underline", "\033[4m", "", "", NULL},
135			{"/underline", "\033[m", NULL, "", NULL}, // \033[24m does not work in Fterm
136			{"u", "\033[4m", "", "", NULL},
137			{"/u", "\033[m", NULL, "", NULL},
138			{"color", NULL, NULL, "", lml_tag_color_filter},
139			{"/color", "\033[m", NULL, "", NULL},
140			{"quote", NULL, NULL, "", lml_tag_quote_filter},
141			{"/quote", NULL, NULL, "", lml_tag_quote_filter},
142			{"url", "", "", "", NULL},
143			{"/url", "（链接: %s）", NULL, "", NULL},
144			{"link", "", "", "", NULL},
145			{"/link", "（链接: %s）", NULL, "", NULL},
146			{"email", "", "", "", NULL},
147			{"/email", "（Email: %s）", NULL, "", NULL},
148			{"user", "", "", "", NULL},
149			{"/user", "（用户: %s）", NULL, "", NULL},
150			{"article", "", "", "", NULL},
151			{"/article", "（文章: %s）", NULL, "", NULL},
152			{"image", "（图片: %s）", "", "%s", NULL},
153			{"flash", "（Flash: %s）", "", "", NULL},
154			{"bwf", "\033[1;31m**\033[m", "", "**", NULL},
155	sysadm	1.1	};
156
157	sysadm	1.24	#define LML_TAG_COUNT (sizeof(lml_tag_def) / sizeof(LML_TAG_DEF))
158	sysadm	1.3
159	sysadm	1.19	static int lml_tag_name_len[LML_TAG_COUNT];
160			static int lml_ready = 0;
161	sysadm	1.1
162			inline static void lml_init(void)
163			{
164			int i;
165
166	sysadm	1.19	if (!lml_ready)
167	sysadm	1.1	{
168			for (i = 0; i < LML_TAG_COUNT; i++)
169			{
170	sysadm	1.22	lml_tag_name_len[i] = (int)strlen(lml_tag_def[i].tag_name);
171	sysadm	1.1	}
172
173	sysadm	1.19	lml_ready = 1;
174	sysadm	1.1	}
175			}
176
177	sysadm	1.36	#define CHECK_AND_APPEND_OUTPUT(out_buf, out_buf_len, out_buf_offset, tag_out, tag_out_len, line_width) \
178	sysadm	1.35	{ \
179			if ((out_buf_offset) + (tag_out_len) >= (out_buf_len)) \
180			{ \
181			log_error("Buffer is not longer enough for output string %d >= %d\n", (out_buf_offset) + (tag_out_len), (out_buf_len)); \
182			out_buf[out_buf_offset] = '\0'; \
183			return (out_buf_offset); \
184			} \
185			memcpy((out_buf) + (out_buf_offset), (tag_out), (size_t)(tag_out_len)); \
186	sysadm	1.36	*((out_buf) + (out_buf_offset) + (size_t)(tag_out_len)) = '\0'; \
187			(line_width) += str_length((out_buf) + (out_buf_offset), 1); \
188	sysadm	1.35	(out_buf_offset) += (tag_out_len); \
189			}
190	sysadm	1.34
191	sysadm	1.36	int lml_render(const char str_in, char str_out, int buf_len, int width, int quote_mode)
192	sysadm	1.1	{
193	sysadm	1.41	clock_t clock_begin;
194			clock_t clock_end;
195
196	sysadm	1.13	char c;
197	sysadm	1.2	char tag_param_buf[LML_TAG_PARAM_BUF_LEN];
198	sysadm	1.1	char tag_output_buf[LML_TAG_OUTPUT_BUF_LEN];
199			int i;
200			int j = 0;
201			int k;
202			int tag_start_pos = -1;
203	sysadm	1.26	int tag_name_pos = -1;
204	sysadm	1.1	int tag_end_pos = -1;
205	sysadm	1.2	int tag_param_pos = -1;
206	sysadm	1.1	int tag_output_len;
207	sysadm	1.5	int new_line = 1;
208			int fb_quote_level = 0;
209	sysadm	1.26	int tag_name_found;
210	sysadm	1.36	int line_width = 0;
211	sysadm	1.1
212	sysadm	1.41	clock_begin = clock();
213
214	sysadm	1.1	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	1.39	if (lml_tag_disabled && new_line)
255			{
256			new_line = 0;
257			}
258
259	sysadm	1.41	if (!quote_mode && !lml_tag_disabled && str_in[i] == '\033' && str_in[i + 1] == '[') // Escape sequence
260	sysadm	1.8	{
261	sysadm	1.37	for (k = i + 2; isdigit(str_in[k]) \|\| str_in[k] == ';' \|\| str_in[k] == '?'; k++)
262	sysadm	1.8	;
263
264	sysadm	1.37	if (str_in[k] == 'm') // valid -- copy directly
265			{
266			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + i, k - i + 1, line_width);
267			}
268			else if (isalpha(str_in[k]))
269			{
270			// unsupported ANSI CSI command
271			}
272			else
273	sysadm	1.8	{
274	sysadm	1.35	k--;
275	sysadm	1.8	}
276	sysadm	1.35
277			i = k;
278			continue;
279	sysadm	1.8	}
280
281	sysadm	1.28	if (str_in[i] == '\n') // jump out of tag at end of line
282	sysadm	1.5	{
283	sysadm	1.41	if (!lml_tag_disabled && tag_start_pos != -1) // tag is not closed
284	sysadm	1.28	{
285			tag_end_pos = i - 1;
286			tag_output_len = tag_end_pos - tag_start_pos + 1;
287	sysadm	1.38
288			if (line_width + tag_output_len > width)
289			{
290			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
291			new_line = 1;
292			line_width = 0;
293	sysadm	1.40	i--; // redo at current i
294	sysadm	1.38	}
295			else
296			{
297			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
298			}
299	sysadm	1.28	}
300
301	sysadm	1.41	if (!lml_tag_disabled && fb_quote_level > 0)
302	sysadm	1.33	{
303			lml_tag_quote_level -= fb_quote_level;
304
305	sysadm	1.36	tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, (quote_mode ? "" : "\033[m"));
306			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
307
308			fb_quote_level = 0;
309	sysadm	1.33	}
310
311	sysadm	1.38	if (new_line)
312			{
313			continue;
314			}
315
316	sysadm	1.28	tag_start_pos = -1;
317			tag_name_pos = -1;
318	sysadm	1.5	new_line = 1;
319	sysadm	1.38	line_width = -1;
320	sysadm	1.5	}
321	sysadm	1.36	else if (str_in[i] == '\r' \|\| str_in[i] == '\7')
322	sysadm	1.5	{
323	sysadm	1.36	continue; // Skip special characters
324	sysadm	1.5	}
325
326	sysadm	1.20	if (!lml_tag_disabled && str_in[i] == '[')
327	sysadm	1.1	{
328	sysadm	1.33	if (tag_start_pos != -1) // tag is not closed
329			{
330			tag_end_pos = i - 1;
331			tag_output_len = tag_end_pos - tag_start_pos + 1;
332	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
333	sysadm	1.33	}
334
335	sysadm	1.26	tag_start_pos = i;
336			tag_name_pos = i + 1;
337	sysadm	1.1	}
338	sysadm	1.32	else if (!lml_tag_disabled && str_in[i] == ']' && tag_name_pos >= 0)
339	sysadm	1.1	{
340	sysadm	1.32	tag_end_pos = i;
341
342			// Skip space characters
343			while (str_in[tag_name_pos] == ' ')
344	sysadm	1.1	{
345	sysadm	1.32	tag_name_pos++;
346			}
347	sysadm	1.1
348	sysadm	1.32	for (tag_name_found = 0, k = 0; k < LML_TAG_COUNT; k++)
349			{
350			if (strncasecmp(lml_tag_def[k].tag_name, str_in + tag_name_pos, (size_t)lml_tag_name_len[k]) == 0)
351	sysadm	1.1	{
352	sysadm	1.32	tag_param_pos = -1;
353			switch (str_in[tag_name_pos + lml_tag_name_len[k]])
354	sysadm	1.1	{
355	sysadm	1.32	case ' ':
356			tag_name_found = 1;
357			tag_param_pos = tag_name_pos + lml_tag_name_len[k] + 1;
358			while (str_in[tag_param_pos] == ' ')
359			{
360			tag_param_pos++;
361			}
362			strncpy(tag_param_buf, str_in + tag_param_pos, (size_t)MIN(tag_end_pos - tag_param_pos, LML_TAG_PARAM_BUF_LEN));
363			tag_param_buf[MIN(tag_end_pos - tag_param_pos, LML_TAG_PARAM_BUF_LEN)] = '\0';
364			case ']':
365			tag_name_found = 1;
366			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
367			{
368			strncpy(tag_param_buf, lml_tag_def[k].default_param, LML_TAG_PARAM_BUF_LEN - 1);
369			tag_param_buf[LML_TAG_PARAM_BUF_LEN - 1] = '\0';
370			}
371	sysadm	1.34	tag_output_len = 0;
372	sysadm	1.32	if (!quote_mode)
373			{
374			if (lml_tag_def[k].tag_output != NULL)
375			{
376			tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, lml_tag_def[k].tag_output, tag_param_buf);
377			}
378			else if (lml_tag_def[k].tag_filter_cb != NULL)
379			{
380			tag_output_len = lml_tag_def[k].tag_filter_cb(
381			lml_tag_def[k].tag_name, tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, 0);
382			}
383			}
384			else // if (quote_mode)
385	sysadm	1.1	{
386	sysadm	1.32	if (lml_tag_def[k].quote_mode_output != NULL)
387			{
388			tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, lml_tag_def[k].quote_mode_output, tag_param_buf);
389			}
390			else if (lml_tag_def[k].tag_filter_cb != NULL)
391			{
392			tag_output_len = lml_tag_def[k].tag_filter_cb(
393			lml_tag_def[k].tag_name, tag_param_buf, tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, 1);
394			}
395	sysadm	1.1	}
396	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
397	sysadm	1.1	break;
398	sysadm	1.32	default: // tag_name not match
399			continue;
400	sysadm	1.1	}
401	sysadm	1.32	break;
402	sysadm	1.1	}
403	sysadm	1.32	}
404	sysadm	1.1
405	sysadm	1.32	if (!tag_name_found)
406			{
407	sysadm	1.40	if (line_width + 1 > width)
408	sysadm	1.38	{
409			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
410			new_line = 1;
411			line_width = 0;
412	sysadm	1.40	i--; // redo at current i
413	sysadm	1.38	continue;
414			}
415
416	sysadm	1.40	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "[", 1, line_width);
417			i = tag_start_pos; // restart from tag_start_pos + 1
418			tag_start_pos = -1;
419			tag_name_pos = -1;
420			continue;
421	sysadm	1.1	}
422	sysadm	1.32
423			tag_start_pos = -1;
424			tag_name_pos = -1;
425	sysadm	1.1	}
426	sysadm	1.26	else if (lml_tag_disabled \|\| tag_name_pos == -1) // not in LML tag
427	sysadm	1.1	{
428	sysadm	1.36	if (line_width + (str_in[i] & 0x80 ? 2 : 1) > width)
429			{
430			CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, "\n", 1, line_width);
431			new_line = 1;
432			line_width = 0;
433	sysadm	1.40	i--; // redo at current i
434	sysadm	1.36	continue;
435			}
436
437			tag_output_len = 1;
438	sysadm	1.22	if (str_in[i] & 0x80) // head of multi-byte character
439	sysadm	1.1	{
440	sysadm	1.22	c = (str_in[i] & 0x70) << 1;
441			while (c & 0x80)
442	sysadm	1.1	{
443	sysadm	1.36	if (str_in[i + tag_output_len] == '\0')
444	sysadm	1.13	{
445	sysadm	1.36	break;
446	sysadm	1.13	}
447	sysadm	1.36	tag_output_len++;
448	sysadm	1.22	c = (c & 0x7f) << 1;
449	sysadm	1.1	}
450			}
451
452	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + i, tag_output_len, line_width);
453			i += (tag_output_len - 1);
454	sysadm	1.1	}
455			else // in LML tag
456			{
457			// Do nothing
458			}
459			}
460
461	sysadm	1.41	if (!lml_tag_disabled && tag_start_pos != -1) // tag is not closed
462	sysadm	1.26	{
463			tag_end_pos = i - 1;
464			tag_output_len = tag_end_pos - tag_start_pos + 1;
465	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, str_in + tag_start_pos, tag_output_len, line_width);
466	sysadm	1.26	}
467
468	sysadm	1.23	if (!quote_mode && !lml_tag_disabled && lml_tag_quote_level > 0)
469	sysadm	1.5	{
470			tag_output_len = snprintf(tag_output_buf, LML_TAG_OUTPUT_BUF_LEN, "\033[m");
471	sysadm	1.36	CHECK_AND_APPEND_OUTPUT(str_out, buf_len, j, tag_output_buf, tag_output_len, line_width);
472	sysadm	1.5	}
473
474	sysadm	1.1	str_out[j] = '\0';
475
476	sysadm	1.41	clock_end = clock();
477			lml_total_exec_duration += (clock_end - clock_begin);
478
479	sysadm	1.1	return j;
480	sysadm	1.5	}
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