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/* Man page to help file converter
Copyright (C) 1994, 1995 Janne Kukonlehto
2002 Andrew V. Samoilov
2002 Pavel Roskin
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 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <glib.h>
#include "help.h"
#include "glibcompat.h"
#define BUFFER_SIZE 256
static int col = 0; /* Current output column */
static int out_row = 1; /* Current output row */
static int in_row = 0; /* Current input row */
static int no_split_flag = 0; /* Flag: Don't split section on next ".SH" */
static int skip_flag = 0; /* Flag: Skip this section.
0 = don't skip,
1 = skipping title,
2 = title skipped, skipping text */
static int link_flag = 0; /* Flag: Next line is a link */
static int verbatim_flag = 0; /* Flag: Copy input to output verbatim */
static int node = 0; /* Flag: This line is an original ".SH" */
static const char *c_out; /* Output filename */
static FILE *f_out; /* Output file */
static const char *c_in; /* Current input filename */
static int indentation; /* Indentation level, n spaces */
static int tp_flag; /* Flag: .TP paragraph
1 = this line is .TP label,
2 = first line of label description. */
static char *topics = NULL;
struct node {
char *node; /* Section name */
char *lname; /* Translated .SH, NULL if not translated */
struct node *next;
int heading_level;
};
static struct node nodes;
static struct node *cnode; /* Current node */
#define MAX_STREAM_BLOCK 8192
/*
* Read in blocks of reasonable size and make sure we read everything.
* Failure to read everything is an error, indicated by returning 0.
*/
static size_t
persistent_fread (void *data, size_t len, FILE *stream)
{
size_t count;
size_t bytes_done = 0;
char *ptr = (char *) data;
if (len <= 0)
return 0;
while (bytes_done < len) {
count = len - bytes_done;
if (count > MAX_STREAM_BLOCK)
count = MAX_STREAM_BLOCK;
count = fread (ptr, 1, count, stream);
if (count <= 0)
return 0;
bytes_done += count;
ptr += count;
}
return bytes_done;
}
/*
* Write in blocks of reasonable size and make sure we write everything.
* Failure to write everything is an error, indicated by returning 0.
*/
static size_t
persistent_fwrite (const void *data, size_t len, FILE *stream)
{
size_t count;
size_t bytes_done = 0;
const char *ptr = (const char *) data;
if (len <= 0)
return 0;
while (bytes_done < len) {
count = len - bytes_done;
if (count > MAX_STREAM_BLOCK)
count = MAX_STREAM_BLOCK;
count = fwrite (ptr, 1, count, stream);
if (count <= 0)
return 0;
bytes_done += count;
ptr += count;
}
return bytes_done;
}
/* Report error in input */
static void
print_error (const char *message)
{
fprintf (stderr, "man2hlp: %s in file \"%s\" on line %d\n", message,
c_in, in_row);
}
/* Do fopen(), exit if it fails */
static FILE *
fopen_check (const char *filename, const char *flags)
{
char tmp[BUFFER_SIZE];
FILE *f;
f = fopen (filename, flags);
if (f == NULL) {
g_snprintf (tmp, sizeof (tmp), "man2hlp: Cannot open file \"%s\"",
filename);
perror (tmp);
exit (3);
}
return f;
}
/* Do fclose(), exit if it fails */
static void
fclose_check (FILE *f)
{
if (ferror (f)) {
perror ("man2hlp: File error");
exit (3);
}
if (fclose (f)) {
perror ("man2hlp: Cannot close file");
exit (3);
}
}
/* Change output line */
static void
newline (void)
{
out_row++;
col = 0;
fprintf (f_out, "\n");
}
/* Calculate the length of string */
static int
string_len (const char *buffer)
{
static int anchor_flag = 0; /* Flag: Inside hypertext anchor name */
static int link_flag = 0; /* Flag: Inside hypertext link target name */
int backslash_flag = 0; /* Flag: Backslash quoting */
int c; /* Current character */
int len = 0; /* Result: the length of the string */
while (*(buffer)) {
c = *buffer++;
if (c == CHAR_LINK_POINTER)
link_flag = 1; /* Link target name starts */
else if (c == CHAR_LINK_END)
link_flag = 0; /* Link target name ends */
else if (c == CHAR_NODE_END) {
/* Node anchor name starts */
anchor_flag = 1;
/* Ugly hack to prevent loss of one space */
len++;
}
/* Don't add control characters to the length */
if (c >= 0 && c < 32)
continue;
/* Attempt to handle backslash quoting */
if (c == '\\' && !backslash_flag) {
backslash_flag = 1;
continue;
}
backslash_flag = 0;
/* Increase length if not inside anchor name or link target name */
if (!anchor_flag && !link_flag)
len++;
if (anchor_flag && c == ']') {
/* Node anchor name ends */
anchor_flag = 0;
}
}
return len;
}
/* Output the string */
static void
print_string (char *buffer)
{
int len; /* The length of current word */
int c; /* Current character */
int backslash_flag = 0;
/* Skipping lines? */
if (skip_flag)
return;
/* Copying verbatim? */
if (verbatim_flag) {
/* Attempt to handle backslash quoting */
while (*(buffer)) {
c = *buffer++;
if (c == '\\' && !backslash_flag) {
backslash_flag = 1;
continue;
}
backslash_flag = 0;
fputc (c, f_out);
}
} else {
/* Split into words */
buffer = strtok (buffer, " \t\n");
/* Repeat for each word */
while (buffer) {
/* Skip empty strings */
if (*(buffer)) {
len = string_len (buffer);
/* Change the line if about to break the right margin */
if (col + len >= HELP_TEXT_WIDTH)
newline ();
/* Words are separated by spaces */
if (col > 0) {
fputc (' ', f_out);
col++;
} else if (indentation) {
while (col++ < indentation)
fputc (' ', f_out);
}
/* Attempt to handle backslash quoting */
while (*(buffer)) {
c = *buffer++;
if (c == '\\' && !backslash_flag) {
backslash_flag = 1;
continue;
}
backslash_flag = 0;
fputc (c, f_out);
}
/* Increase column */
col += len;
}
/* Get the next word */
buffer = strtok (NULL, " \t\n");
} /* while */
}
}
/* Like print_string but with printf-like syntax */
static void
printf_string (const char *format, ...)
{
va_list args;
char buffer[BUFFER_SIZE];
va_start (args, format);
g_vsnprintf (buffer, sizeof (buffer), format, args);
va_end (args);
print_string (buffer);
}
/* Handle NODE and .SH commands. is_sh is 1 for .SH, 0 for NODE */
static void
handle_node (char *buffer, int is_sh)
{
int len, heading_level;
/* If we already skipped a section, don't skip another */
if (skip_flag == 2) {
skip_flag = 0;
}
/* Get the command parameters */
buffer = strtok (NULL, "");
if (buffer == NULL) {
print_error ("Syntax error: .SH: no title");
return;
} else {
/* Remove quotes */
if (buffer[0] == '"') {
buffer++;
len = strlen (buffer);
if (buffer[len - 1] == '"') {
len--;
buffer[len] = 0;
}
}
/* Calculate heading level */
heading_level = 0;
while (buffer[heading_level] == ' ')
heading_level++;
/* Heading level must be even */
if (heading_level & 1)
print_error ("Syntax error: .SH: odd heading level");
if (no_split_flag) {
/* Don't start a new section */
newline ();
print_string (buffer);
newline ();
newline ();
no_split_flag = 0;
} else if (skip_flag) {
/* Skipping title and marking text for skipping */
skip_flag = 2;
} else {
buffer += heading_level;
if (!is_sh || !node) {
/* Start a new section, but omit empty section names */
if (*buffer) {
fprintf (f_out, "%c[%s]", CHAR_NODE_END, buffer);
col++;
newline ();
}
/* Add section to the linked list */
if (!cnode) {
cnode = &nodes;
} else {
cnode->next = malloc (sizeof (nodes));
cnode = cnode->next;
}
cnode->node = strdup (buffer);
cnode->lname = NULL;
cnode->next = NULL;
cnode->heading_level = heading_level;
}
if (is_sh) {
/* print_string() strtok()es buffer, so */
cnode->lname = strdup (buffer);
print_string (buffer);
newline ();
newline ();
}
} /* Start new section */
} /* Has parameters */
node = !is_sh;
}
/* Convert character from the macro name to the font marker */
static inline char
char_to_font (char c)
{
switch (c) {
case 'R':
return CHAR_FONT_NORMAL;
case 'B':
return CHAR_FONT_BOLD;
case 'I':
return CHAR_FONT_ITALIC;
default:
return 0;
}
}
/*
* Handle alternate font commands (.BR, .IR, .RB, .RI, .BI, .IB)
* Return 0 if the command wasn't recognized, 1 otherwise
*/
static int
handle_alt_font (char *buffer)
{
char *p;
char *w;
char font[2];
int in_quotes = 0;
int alt_state = 0;
if (strlen (buffer) != 3)
return 0;
if (buffer[0] != '.')
return 0;
font[0] = char_to_font (buffer[1]);
font[1] = char_to_font (buffer[2]);
/* Exclude names with unknown characters, .BB, .II and .RR */
if (font[0] == 0 || font[1] == 0 || font[0] == font[1])
return 0;
p = strtok (NULL, "");
if (p == NULL) {
return 1;
}
w = buffer;
*w++ = font[0];
while (*p) {
if (*p == '"') {
in_quotes = !in_quotes;
p++;
continue;
}
if (*p == ' ' && !in_quotes) {
p++;
/* Don't change font if we are at the end */
if (*p != 0) {
alt_state = !alt_state;
*w++ = font[alt_state];
}
/* Skip more spaces */
while (*p == ' ')
p++;
continue;
}
*w++ = *p++;
}
/* Turn off attributes if necessary */
if (font[alt_state] != CHAR_FONT_NORMAL)
*w++ = CHAR_FONT_NORMAL;
*w = 0;
print_string (buffer);
return 1;
}
/* Handle .IP and .TP commands. is_tp is 1 for .TP, 0 for .IP */
static void
handle_tp_ip (int is_tp)
{
if (col > 0)
newline ();
newline ();
if (is_tp) {
tp_flag = 1;
indentation = 0;
} else
indentation = 8;
}
/* Handle all the roff dot commands. See man groff_man for details */
static void
handle_command (char *buffer)
{
int len;
/* Get the command name */
strtok (buffer, " \t");
if (strcmp (buffer, ".SH") == 0) {
indentation = 0;
handle_node (buffer, 1);
} else if (strcmp (buffer, ".\\\"NODE") == 0) {
handle_node (buffer, 0);
} else if (strcmp (buffer, ".\\\"DONT_SPLIT\"") == 0) {
no_split_flag = 1;
} else if (strcmp (buffer, ".\\\"SKIP_SECTION\"") == 0) {
skip_flag = 1;
} else if (strcmp (buffer, ".\\\"LINK2\"") == 0) {
/* Next two input lines form a link */
link_flag = 2;
} else if ((strcmp (buffer, ".PP") == 0)
|| (strcmp (buffer, ".P") == 0)
|| (strcmp (buffer, ".LP") == 0)) {
indentation = 0;
/* End of paragraph */
if (col > 0)
newline ();
newline ();
} else if (strcmp (buffer, ".nf") == 0) {
/* Following input lines are to be handled verbatim */
verbatim_flag = 1;
if (col > 0)
newline ();
} else if (strcmp (buffer, ".I") == 0 || strcmp (buffer, ".B") == 0
|| strcmp (buffer, ".SB") == 0) {
/* Bold text or italics text */
char *p;
char *w;
int backslash_flag = 0;
/* .SB [text]
* Causes the text on the same line or the text on the
* next line to appear in boldface font, one point
* size smaller than the default font.
*/
/* FIXME: text is optional, so there is no error */
p = strtok (NULL, "");
if (p == NULL) {
print_error ("Syntax error: .I | .B | .SB : no text");
return;
}
*buffer = (buffer[1] == 'I') ? CHAR_FONT_ITALIC : CHAR_FONT_BOLD;
/* Attempt to handle backslash quoting */
for (w = &buffer[1]; *p; p++) {
if (*p == '\\' && !backslash_flag) {
backslash_flag = 1;
continue;
}
backslash_flag = 0;
*w++ = *p;
}
*w++ = CHAR_FONT_NORMAL;
*w = 0;
print_string (buffer);
} else if (strcmp (buffer, ".TP") == 0) {
handle_tp_ip (1);
} else if (strcmp (buffer, ".IP") == 0) {
handle_tp_ip (0);
} else if (strcmp (buffer, ".\\\"TOPICS") == 0) {
if (out_row > 1) {
print_error
("Syntax error: .\\\"TOPICS must be first command");
return;
}
buffer = strtok (NULL, "");
if (buffer == NULL) {
print_error ("Syntax error: .\\\"TOPICS: no text");
return;
}
/* Remove quotes */
if (buffer[0] == '"') {
buffer++;
len = strlen (buffer);
if (buffer[len - 1] == '"') {
len--;
buffer[len] = 0;
}
}
topics = strdup (buffer);
} else if (strcmp (buffer, ".br") == 0) {
if (col)
newline ();
} else if (strncmp (buffer, ".\\\"", 3) == 0) {
/* Comment */
} else if (strcmp (buffer, ".TH") == 0) {
/* Title header */
} else if (strcmp (buffer, ".SM") == 0) {
/* Causes the text on the same line or the text on the
* next line to appear in a font that is one point
* size smaller than the default font. */
buffer = strtok (NULL, "");
if (buffer)
print_string (buffer);
} else if (handle_alt_font (buffer) == 1) {
return;
} else {
/* Other commands are ignored */
char warn_str[BUFFER_SIZE];
g_snprintf (warn_str, sizeof (warn_str),
"Warning: unsupported command %s", buffer);
print_error (warn_str);
return;
}
}
static struct links {
char *linkname; /* Section name */
int line; /* Input line in ... */
const char *filename;
struct links *next;
} links, *current_link;
static void
handle_link (char *buffer)
{
static char old[80];
int len;
char *amp;
const char *amp_arg;
switch (link_flag) {
case 1:
/* Old format link, not supported */
break;
case 2:
/* First part of new format link */
/* Bold text or italics text */
if (buffer[0] == '.' && (buffer[1] == 'I' || buffer[1] == 'B'))
for (buffer += 2; *buffer == ' ' || *buffer == '\t'; buffer++);
g_strlcpy (old, buffer, sizeof (old));
link_flag = 3;
break;
case 3:
/* Second part of new format link */
if (buffer[0] == '.')
buffer++;
if (buffer[0] == '\\')
buffer++;
if (buffer[0] == '"')
buffer++;
len = strlen (buffer);
if (len && buffer[len - 1] == '"') {
buffer[--len] = 0;
}
/* "Layout\&)," -- "Layout" should be highlighted, but not ")," */
amp = strstr (old, "\\&");
if (amp) {
*amp = 0;
amp += 2;
amp_arg = amp;
} else {
amp_arg = "";
}
printf_string ("%c%s%c%s%c%s\n", CHAR_LINK_START, old,
CHAR_LINK_POINTER, buffer, CHAR_LINK_END, amp_arg);
link_flag = 0;
/* Add to the linked list */
if (current_link) {
current_link->next = malloc (sizeof (links));
current_link = current_link->next;
current_link->next = NULL;
} else {
current_link = &links;
}
current_link->linkname = strdup (buffer);
current_link->filename = c_in;
current_link->line = in_row;
break;
}
}
int
main (int argc, char **argv)
{
int len; /* Length of input line */
const char *c_man; /* Manual filename */
const char *c_tmpl; /* Template filename */
FILE *f_man; /* Manual file */
FILE *f_tmpl; /* Template file */
char buffer[BUFFER_SIZE]; /* Full input line */
char *node = NULL;
char *outfile_buffer; /* Large buffer to keep the output file */
long cont_start; /* Start of [Contents] */
long file_end; /* Length of the output file */
/* Validity check for arguments */
if (argc != 4) {
fprintf (stderr,
"Usage: man2hlp file.man template_file helpfile\n");
return 3;
}
c_man = argv[1];
c_tmpl = argv[2];
c_out = argv[3];
/* First stage - process the manual, write to the output file */
f_man = fopen_check (c_man, "r");
f_out = fopen_check (c_out, "w");
c_in = c_man;
/* Repeat for each input line */
while (fgets (buffer, BUFFER_SIZE, f_man)) {
char *input_line; /* Input line without initial "\&" */
if (buffer[0] == '\\' && buffer[1] == '&')
input_line = buffer + 2;
else
input_line = buffer;
in_row++;
len = strlen (input_line);
/* Remove terminating newline */
if (input_line[len - 1] == '\n') {
len--;
input_line[len] = 0;
}
if (verbatim_flag) {
/* Copy the line verbatim */
if (strcmp (input_line, ".fi") == 0) {
verbatim_flag = 0;
} else {
print_string (input_line);
newline ();
}
} else if (link_flag) {
/* The line is a link */
handle_link (input_line);
} else if (buffer[0] == '.') {
/* The line is a roff command */
handle_command (input_line);
} else {
/* A normal line, just output it */
print_string (input_line);
}
/* .TP label processed as usual line */
if (tp_flag) {
if (tp_flag == 1) {
tp_flag = 2;
} else {
tp_flag = 0;
indentation = 8;
if (col >= indentation)
newline ();
else
while (++col < indentation)
fputc (' ', f_out);
}
}
}
newline ();
fclose_check (f_man);
/* First stage ends here, closing the manual */
/* Second stage - process the template file */
f_tmpl = fopen_check (c_tmpl, "r");
c_in = c_tmpl;
/* Repeat for each input line */
/* Read a line */
while (fgets (buffer, BUFFER_SIZE, f_tmpl)) {
if (node) {
if (*buffer && *buffer != '\n') {
cnode->lname = strdup (buffer);
node = strchr (cnode->lname, '\n');
if (node)
*node = 0;
}
node = NULL;
} else {
node = strchr (buffer, CHAR_NODE_END);
if (node && (node[1] == '[')) {
char *p = strchr (node, ']');
if (p) {
if (strncmp (node + 1, "[main]", 6) == 0) {
node = 0;
} else {
if (!cnode) {
cnode = &nodes;
} else {
cnode->next = malloc (sizeof (nodes));
cnode = cnode->next;
}
cnode->node = strdup (node + 2);
cnode->node[p - node - 2] = 0;
cnode->lname = NULL;
cnode->next = NULL;
cnode->heading_level = 0;
}
} else
node = NULL;
} else
node = NULL;
}
fputs (buffer, f_out);
}
cont_start = ftell (f_out);
if (cont_start <= 0) {
perror (c_out);
return 1;
}
if (topics)
fprintf (f_out, "\004[Contents]\n%s\n\n", topics);
else
fprintf (f_out, "\004[Contents]\n");
for (current_link = &links; current_link && current_link->linkname;) {
int found = 0;
struct links *next = current_link->next;
if (strcmp (current_link->linkname, "Contents") == 0) {
found = 1;
} else {
for (cnode = &nodes; cnode && cnode->node; cnode = cnode->next) {
if (strcmp (cnode->node, current_link->linkname) == 0) {
found = 1;
break;
}
}
}
if (!found) {
g_snprintf (buffer, sizeof (buffer), "Stale link \"%s\"",
current_link->linkname);
c_in = current_link->filename;
in_row = current_link->line;
print_error (buffer);
}
free (current_link->linkname);
if (current_link != &links)
free (current_link);
current_link = next;
}
for (cnode = &nodes; cnode && cnode->node;) {
char *node = cnode->node;
struct node *next = cnode->next;
if (*node)
fprintf (f_out, " %*s\001%s\002%s\003", cnode->heading_level,
"", cnode->lname ? cnode->lname : node, node);
fprintf (f_out, "\n");
free (cnode->node);
if (cnode->lname)
free (cnode->lname);
if (cnode != &nodes)
free (cnode);
cnode = next;
}
file_end = ftell (f_out);
/* Sanity check */
if ((file_end <= 0) || (file_end - cont_start <= 0)) {
perror (c_out);
return 1;
}
fclose_check (f_out);
fclose_check (f_tmpl);
/* Second stage ends here, closing all files, note the end of output */
/*
* Third stage - swap two parts of the output file.
* First, open the output file for reading and load it into the memory.
*/
f_out = fopen_check (c_out, "r");
outfile_buffer = malloc (file_end);
if (!outfile_buffer)
return 1;
if (!persistent_fread (outfile_buffer, file_end, f_out)) {
perror (c_out);
return 1;
}
fclose_check (f_out);
/* Now the output file is in the memory */
/* Again open output file for writing */
f_out = fopen_check (c_out, "w");
/* Write part after the "Contents" node */
if (!persistent_fwrite
(outfile_buffer + cont_start, file_end - cont_start, f_out)) {
perror (c_out);
return 1;
}
/* Write part before the "Contents" node */
if (!persistent_fwrite (outfile_buffer, cont_start, f_out)) {
perror (c_out);
return 1;
}
free (outfile_buffer);
fclose_check (f_out);
/* Closing everything */
return 0;
}
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