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tlgu.c
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/* tlgu: Translates TLG (D) / PHI text files to Unicode text
*
* Copyright (C) 2004, 2005, 2011, 2013, 2020, 2021 Dimitri Marinakis
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License Version 2
* as published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Usage:
* tlgu [options] [beta_code_file] [unicode_text_file]
*
* Options:
* -r -- primarily Roman text (e.g. Canon, PHI); default betastate = ROMAN, reset on every ID code
* -v -w -x -y -z -- work reference citations are printed in the form xxx.xxx...xxx
* -Z <custom_citation_format_prefix> -- use reference and description citation codes in string
* reference a-z, description A-Z also special codes \t(ab) \n(new line) \r(eturn)
* e.g. "%A/%Z/%v/%w/%y/%z\t"
* -e -- companion to -Z above; a string to put out when a defined citation slot
* is empty (e.g. "NONE", or "-")
*
* -b -- books are preceded by a page feed and description citations are printed
* -p -- pagination is observed, otherwise book lines are printed continuously
* -B -- output blank space (tab) after each new line (beginning of line)
*
* -X -- citations are printed as they change (v, w, x)
* -Y -- citations are printed as they change (w, x, y)
* -N -- no spaces - line ends, and hyphens before an ID code, are removed
*
* -C -- citation debug information is printed
* -S -- special code debug information is printed
* -T -- bracket debug information is printed
* -V -- processing debug information is printed
* -W -- multiple output files, one for each work
*
* Returns: exit code 1 if unsuccesful
*
* Make: gcc tlgu.c -o tlgu
*
* History: This is a re-write of a DOS program (tlgft.asm) written several
* years ago to translate Hellenic texts distributed on the TLG CD-ROM from
* "beta code" to something readable, editable and printable.
*
* Contributors: Troy Griffitts (tg), Nick White (nw)
*
* Pointers / References:
* TLG Project - www.tlg.uci.edu
* PHI CD ROM Format Description, Packard Humanities Institute, 19 April 1992
* Beta code reference - Text versions: tlgbeta.txt, tlgcode.txt, BCM2004.pdf (23-Jun-2004)
*
* ID locator reference - Text version tlgcodes.txt
*
* 14-Jun-2001 dm -- c port: ELOT-928 with custom dead-accent codes
* 14-Jun-2004 dm -- Unicode
* 26-Jun-2004 dm -- Command-line options
* 26-Feb-2005 dm -- Output file separation (-W option)
* 06-Mar-2005 dm -- Latin accent characters added (without parentheses)
* 02-Aug-2005 tg -- Free-form citations (options -Z, -e) and per-line processing
* 22-Apr-2006 dm -- Includes to make gcc (4.x) happy, final sigma fix for free text
* 02-Oct-2011 dm -- Output written to stdout if an output file name is not provided
* 16-Oct-2011 dm -- Code correction for lower case phi
* 20-Nov-2011 dm -- stop processing gracefully when writing to stdout
* 20-Nov-2011 dm -- e-book type citations (options -X -Y)
* 01-May-2012 nw -- reading from stdin
* 17-Mar-2013 dm -- minor error handling corrections
* 15-May-2020 dm -- vowels with acute accent may be output with U0370 codes (option -U), additional code points
* 18-May-2020 dm -- rudimentary quasi bracket handling
* 27-Jul-2021 dm -- citation handling corrections
*/
#include "tlgu.h"
#include "tlgcodes.h"
/****************** PROTOTYPES FROM THE TOP DOWN *******************/
int tlgu (char * input_file, char * output_file);
void output_utf2(int ucode);
void output_utf(int ucode);
void output_string(char *outstr);
int process_beta (int input_count);
void beta_code(int input_count);
int id_code(int input_count);
void store_accents(unsigned char bufferchar);
const char *resolve_cite_format(const char *cformat);
/****************** PROGRAM VERSION INFORMATION *******************/
char *prog_version="1.9";
/****************** COMMAND LINE OPTIONS **************************/
int opt_roman = 0;
int opt_page = 0;
int opt_blank = 0;
int opt_acit = 0;
int opt_bcit = 0;
int opt_ccit = 0;
int opt_dcit = 0;
int opt_cit_id = 0; /* combines a, b, c */
int opt_vcit = 0;
int opt_wcit = 0;
int opt_xcit = 0;
int opt_ycit = 0;
int opt_cprefix = 0;
char cformat[253];
int opt_ecit_blank = 0;
char ecite[253];
int opt_zcit = 0;
int opt_verbose = 0;
int opt_debug_bracket = 0;
int opt_debug_cit = 0;
int opt_debug_special = 0;
int opt_multiple = 0;
int opt_ebook_cit_x = 0;
int opt_ebook_cit_y = 0;
int opt_nospace = 0;
int opt_U370 = 0;
/****************** GLOBAL VARIABLES *******************************/
int iptr = 0; /* input buffer pointer, reset before every read */
int optr = 0; /* output buffer pointer, reset after every write */
unsigned char input_buffer[INRECSIZE];
unsigned char output_buffer[OUTRECSIZE];
#define MAXFILELEN 256
int prev_cit_w = 0;
int prev_cit_x = 0;
int prev_cit_y = 0;
/************ GLOBAL BETA CODE PROCESSING VARIABLES **************/
unsigned int outcode;
int betastate; /* translation state machine */
int previous_state; /* needed for symbol translations */
int start_new_line = 0; /* needed for symbol translations */
int book_change = 0; /* needed for symbol translations */
int accents; /* holds accent combinations */
char *accented_chars = "AEHIOUWR";
char *accent_chars = ")(+/\\=|";
char *latin_accent_chars = "+/\\=|";
char *escape_codes = "$&%\"@#^[]<>{}";
char *punctuation_codes = " .,:;_\"%{}$&"; /* used by which_sigma */
char previous_bcit[52][32]; /* holds previous work (book) citation */
/****************** GLOBAL DESCRIPTOR VARIABLES *****************/
/*
Space is reserved for descriptive data as follows:
citations, binary component -- z, y, x, w, v, n (1 to 16383)
citations, ascii component -- a-z (1 to 15 characters + null, only a-d, n, v-z are actually used)
descriptors, binary component -- a-z (1 to 16383)
descriptors, ascii component -- a-z (1 to 31 characters + null)
Citation data ---
a - author citation
b - work citation
c - preferred abbreviation for the work
d - preferred abbreviation for the author
n - if present signifies a document within a work
when it changes, v-z are nulled but are then independent
if n is not present, a change in an upper level nulls out the rest
v-z hierarchical citation levels, high to low
v
w
x - (chapter)
y - (verse) (book)
z - line
Descriptors ---
z - comment sequence number within a work (PHI)
In the common data structures below, citations will hold the first 26 positions (0-25)
while descriptors will hold the next 26 positions.
The maximum number of characters in string citations is 31 (+ null byte)
*/
#define MAX_CITATION 32
int icitation[52];
char citation[52][MAX_CITATION];
int id_level; /* holds translated current id level as an index to ID arrays */
int id_char; /* holds the pointer for the ascii part of the ID arrays */
int id_command; /* holds the current instruction for ID handling */
int id_process; /* if non-zero, command must be processed */
/****************** HANDLE ARGUMENTS AND SYNTAX *******************/
void usage_info(void)
{
printf("\ntlgu: TLG/PHI beta code file to Unicode translator ver. %s\n", prog_version);
printf("\ntlgu: Copyright (C) 2004, 2005, 2011, 2013, 2020, 2021 Dimitri Marinakis");
printf("\ntlgu: This program is free software; you are encouraged to redistribute it under");
printf("\ntlgu: the terms of the GNU General Public License (version 2).\n");
printf("\ntlgu: This program comes with ABSOLUTELY NO WARRANTY. See the GNU General Public");
printf("\ntlgu: License in the file named `COPYING' for more details.\n");
printf("\ntlgu: Syntax: tlgu [options] [beta_code_file] [unicode_text_file]\n");
printf("\ntlgu: -r -- primarily Roman text (e.g. Canon, PHI); default betastate = ROMAN, reset on every ID code");
printf("\ntlgu: -v -w -x -y -z -- work reference citations are printed in the form xxx.xxx...xxx");
printf("\ntlgu: -Z <custom_citation_format_prefix> -- use reference and description citation codes in string");
printf("\ntlgu: reference a-z, description A-Z also special codes \\t(ab) \\n(new line) \\r(eturn)");
printf("\ntlgu: e.g. \"%%A/%%Z/%%v/%%w/%%y/%%z\\t\" \n");
printf("\ntlgu: -e <custom_blank_citation_string> -- e.g. \"[NONE]\" instead of default \"\"");
printf("\ntlgu: -X -- citations are printed as they change (v, w, x)");
printf("\ntlgu: -Y -- citations are printed as they change (w, x, y)");
printf("\ntlgu: -N -- no spaces - line ends, and hyphens before an ID code, are removed");
printf("\n");
printf("\ntlgu: -b -- books are preceded by a page feed and description citations are printed");
printf("\ntlgu: -p -- pagination is observed, otherwise book lines are printed continuously");
printf("\ntlgu: -B -- output blank space (tab) at the beginning of each line");
printf("\n");
printf("\ntlgu: -C -- citation debug information is printed");
printf("\ntlgu: -S -- special code debug information is printed");
printf("\ntlgu: -V -- processing debug information is printed");
printf("\ntlgu: -U -- output acute accents as tonoi in the Greek and Coptic Unicode block (U+0370 ff.)");
printf("\ntlgu: -W -- multiple output files, one for each work (book); output filename must be specified");
printf("\n");
}
int main(int argc, char * argv[])
{
unsigned char ucc; /* test variable */
int idx;
if (sizeof(ucc) != 1) {
printf("\ntlgu: I need 8-bit characters to work\n");
exit(1);
}
while(argc > 1 && argv[1][0] == '-') {
switch(argv[1][1]) {
case 'U':
opt_U370 = 1;
break;
case 'N':
opt_nospace = 1;
break;
case 'W':
opt_multiple = 1;
break ;
case 'V':
opt_verbose = 1;
break ;
case 'S':
opt_debug_special = 1;
break ;
case 'T':
opt_debug_bracket = 1;
break ;
case 'C':
opt_debug_cit = 1;
break ;
case 'X':
opt_ebook_cit_x = 1;
opt_ebook_cit_y = 0;
break;
case 'Y':
opt_ebook_cit_y = 1;
opt_ebook_cit_x = 0;
break;
case 'B':
opt_blank = 1;
break ;
case 'p':
opt_page = 1;
break ;
case 'r':
opt_roman = 1;
break ;
case 'a':
opt_acit = 1;
opt_cit_id = 1;
break ;
case 'b':
opt_bcit = 1;
opt_cit_id = 1;
break ;
case 'c':
opt_ccit = 1;
opt_cit_id = 1;
break ;
case 'd':
opt_dcit = 1;
opt_cit_id = 1;
break ;
case 'v':
opt_vcit = 1;
break ;
case 'w':
opt_wcit = 1;
break ;
case 'x':
opt_xcit = 1;
break;
case 'y':
opt_ycit = 1;
break ;
case 'z':
opt_zcit = 1;
break;
case 'e':
opt_ecit_blank = 1;
strcpy(ecite, argv[1]);
argc-- ;
argv++ ;
break;
case 'Z':
opt_cprefix = 1;
strcpy(cformat, argv[1]);
argc-- ;
argv++ ;
break;
default:
usage_info() ;
exit(0) ;
}
argc-- ;
argv++ ;
}
switch(argc) {
case 1:
return tlgu("", "");
break;
case 2:
return tlgu(argv[1], "");
break;
default:
return tlgu(argv[1], argv[2]);
}
}
/****************** FILE READ-WRITE LOOP **************************/
int tlgu(char *input_file, char *output_file)
{
int i; /* counter */
int j; /* counter */
int infile; /* input file descriptor */
int outfile;/* output file descriptor */
int icnt; /* input file bytes read in input buffer */
int ocnt; /* output file bytes written */
int bytes_to_process; /* bytes read minus bytes already processed */
int wehaveinput; /* flag for while */
int beta_return; /* process beta return code */
char new_file[MAXFILELEN];
struct stat filestat;
/* Open input and output files
*/
// infile = open(input_file, O_RDONLY);
if (strlen(input_file) == 0) {
infile = STDIN_FILENO;
} else {
infile = open(input_file, O_RDONLY);
}
if (infile < 0) {
perror("\ntlgu: input file open");
return(1);
} else {
if (strlen(output_file) == 0) {
outfile = STDOUT_FILENO;
} else {
if (strlen(output_file) < MAXFILELEN-5) {
strcpy(new_file, output_file);
} else {
printf("\ntlgu: output filename too long - exiting\n");
return(1);
}
outfile = open(new_file, O_WRONLY | O_CREAT | O_TRUNC);
}
if (outfile < 0) {
perror("\ntlgu: output file create");
close(infile);
return(1);
}
}
/* Initialize citation
* and descriptor indicators
*/
id_level = 0;
for (i = 0; i < 52; i++) {
icitation[i] = 0;
for (j = 0; j < MAX_CITATION; j++) {
citation[i][j]=0;
}
}
/* Initialize beta processing defaults
* e.g. The TLG Canon needs ROMAN as default
* Hellenic should be reset at each ID CODE
*/
if (opt_roman) betastate = ROMAN;
else betastate = HELLENIC;
/* Read, process and write file blocks,
* Optionally create one file per book (-W), unless no output file name is specified
* Change file mode (equivalent to chmod 644 output_file),
* and return.
* Note: Local deblocking usually yields higher speeds
*/
wehaveinput = 1;
while (wehaveinput) {
/* Read and process beta code in input_buffer */
icnt = read(infile, input_buffer, sizeof(input_buffer));
if (icnt == 0) wehaveinput = 0;
iptr = 0;
while ((icnt > 0) && (iptr < icnt)) {
bytes_to_process = icnt - iptr;
beta_return = process_beta(bytes_to_process);
/* Write processed data and reset output buffer pointer */
if (optr > 0) {
ocnt = write(outfile, output_buffer, optr);
optr = 0;
if (ocnt < 0) {
perror("\ntlgu output file write");
wehaveinput = 0;
}
} else if (beta_return != -2) { /* no more bytes to write, no book change request */
if (opt_verbose) printf("\ntlgu: no more bytes to write");
wehaveinput = 0; /* signal no more input */
}
if ((beta_return == -2) && (outfile != STDOUT_FILENO)) {
/* book change request, close current file and open a new one */
if (opt_verbose) printf("\ntlgu: book change request: %s", previous_bcit[1]);
if (close(outfile)) return(1);
if (chmod(new_file, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) return(1);
/* request file information and delete zero-length files
*/
stat(new_file, &filestat);
if (filestat.st_size == 0) unlink(new_file);
sprintf(new_file, "%s-%s.txt", output_file, previous_bcit[1]);
outfile = open(new_file, O_WRONLY | O_CREAT | O_TRUNC);
if (outfile < 0) {
perror("\ntlgu: new_file create");
close(infile);
return(1);
}
}
}
}
/* Close input and output files,
* make output file readable
*/
close(infile);
if (opt_verbose) printf("\ntlgu: processing complete\n");
if (outfile == STDOUT_FILENO) printf("\n");
if (close(outfile)) {
perror("\ntlgu output file close");
return(1);
}
if (outfile != STDOUT_FILENO) {
if (chmod(new_file, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) {
perror("\ntlgu output file chmod");
return(1);
}
}
return(0);
}
/****************** PROCESSING *************************************/
/* process_beta:
* Processes <input_count> bytes in <input_buffer>
* Returns: -1 for EOF, -2 for book change
* Changes: iptr
*/
int process_beta (int input_count)
{
unsigned char inchar;
unsigned int outcode;
int processing;
int iptr_max; /* holds the calculated maximum input pointer value */
int return_code; /* id_code and beta_code bytes written; error if negative */
char outstring[511];
char nstring[253];
return_code = 0;
/* A beta code stream includes two kinds of data:
* ID data - always has the high bit set.
* Text data - always has the high bit reset.
*/
processing = 1;
iptr_max = iptr + input_count;
if (opt_verbose) printf("\n\ntlgu: process_beta - %d bytes, iptr = %4.4x, iptr_max = %4.4x", input_count, iptr, iptr_max);
while (processing) {
if ((iptr < INRECSIZE) && (iptr < iptr_max)) {
inchar = input_buffer[iptr++];
if (optr < OUTRECSIZE) {
if (inchar == 0) {
/* do nothing for null characters */
} else if (inchar > 0x7F) {
/* ID data - decrement input pointer before processing */
--iptr;
/* Reset beta decoding state if roman option specified */
if (opt_roman) betastate = ROMAN;
/* Process ID code */
return_code = id_code(input_count);
if (return_code == -1) {
if (opt_verbose) printf("\ntlgu: EOF while processing id code");
processing = 0;
} else if (return_code == -2) {
if (opt_verbose) printf("\ntlgu: book change request");
processing = 0;
}
start_new_line = 1;
} else {
/* text data < 0x80 - decrement input pointer before processing */
--iptr;
if (start_new_line) {
/* Write info on (book) citation change */
if (book_change) {
if (opt_cit_id) {
sprintf(outstring, "\n\f[%s] ", citation[0]);
output_string(outstring);
sprintf(outstring, "[%s] ", citation[1]);
output_string(outstring);
sprintf(outstring, "[%s] ", citation[2]);
output_string(outstring);
sprintf(outstring, "[%s]\n", citation[3]);
output_string(outstring);
}
book_change = 0;
}
if (opt_nospace) {
outstring[0] = 0x0;
}
else {
sprintf(outstring, "\n");
}
if (opt_blank)
strcat(outstring, "\t");
else if (opt_cprefix) {
strcat(outstring, resolve_cite_format(cformat));
}
else if (opt_ebook_cit_x) {
if (prev_cit_x != icitation[23]) {
prev_cit_x = icitation[23];
if (prev_cit_w != icitation[22]) {
prev_cit_w = icitation[22];
sprintf(nstring, "\n[%d.%d] ", icitation[22], icitation[23]);
}
else {
sprintf(nstring, "\n[%d] ", icitation[23]);
}
strcat(outstring, nstring);
}
}
else if (opt_ebook_cit_y) {
if (prev_cit_y != icitation[24]) {
prev_cit_y = icitation[24];
if (prev_cit_x != icitation[23]) {
prev_cit_x = icitation[23];
sprintf(nstring, "\n[%d.%d] ", icitation[23], icitation[24]);
}
else {
sprintf(nstring, "\n[%d] ", icitation[24]);
}
strcat(outstring, nstring);
}
}
else if (opt_vcit || opt_wcit || opt_xcit || opt_ycit || opt_zcit) {
if (opt_vcit) {
if (icitation[21] == 0) sprintf(nstring, "%s.", citation[21]);
else sprintf(nstring, "%d%s.", icitation[21], citation[21]);
if ((opt_ecit_blank) && (!*nstring)) strcpy(nstring, ecite);
strcat(outstring, nstring);
}
if (opt_wcit) {
if (icitation[22] == 0) sprintf(nstring, "%s.", citation[22]);
else sprintf(nstring, "%d%s.", icitation[22], citation[22]);
if ((opt_ecit_blank) && (!*nstring)) strcpy(nstring, ecite);
strcat(outstring, nstring);
}
if (opt_xcit) {
if (icitation[23] == 0) sprintf(nstring, "%s.", citation[23]);
else sprintf(nstring, "%d%s.", icitation[23], citation[23]);
if ((opt_ecit_blank) && (!*nstring)) strcpy(nstring, ecite);
strcat(outstring, nstring);
}
if (opt_ycit) {
if (icitation[24] == 0) sprintf(nstring, "%s.", citation[24]);
else sprintf(nstring, "%d%s.", icitation[24], citation[24]);
if ((opt_ecit_blank) && (!*nstring)) strcpy(nstring, ecite);
strcat(outstring, nstring);
}
if (opt_zcit) {
if (icitation[25] == 0) sprintf(nstring, "%s.", citation[25]);
else sprintf(nstring, "%d%s", icitation[25], citation[25]);
if ((opt_ecit_blank) && (!*nstring)) strcpy(nstring, ecite);
strcat(outstring, nstring);
}
/* Separate text from citation using a tab character */
strcat(outstring, "\t");
}
if (input_buffer[iptr] < 0x80) {
/* Print only if not followed by another ID byte */
output_string(outstring);
}
start_new_line = 0;
if (opt_roman) betastate = ROMAN;
else betastate = HELLENIC;
}
beta_code(input_count);
}
} else {
/* Output size is greater than input -- intermediate write */
printf("\ntlgu: FIXME -- DATA LOSS: ERROR output size iptr - %x optr - %x", iptr, optr);
processing = 0;
}
} else {
/* Finished processing all input */
processing = 0;
}
} /* end while processing*/
if (opt_verbose) printf("\ntlgu: iptr - %4.4x, optr - %4.4x ", iptr, optr);
return return_code;
}
/****************** LIBRARY FUNCTIONS ******************************/
/* get_accents:
* gets accents in <accents>
* Returns: number of accents found or zero
* Changes: accents, iptr
*/
int get_accents(void)
{
unsigned char bufferchar;
int processing = 1;
int number_of_accents = 0;
accents = 0;
while (processing) {
if (iptr < INRECSIZE) {
bufferchar = input_buffer[iptr++];
if (betastate == ROMAN) {
if (strchr(latin_accent_chars, bufferchar)) {
store_accents(bufferchar);
number_of_accents++;
} else {
--iptr;
processing = 0;
}
} else if (strchr(accent_chars, bufferchar)) {
store_accents(bufferchar);
number_of_accents++;
} else {
--iptr;
processing = 0;
}
} else {
processing = 0;
}
}
return number_of_accents;
}
/* store_accents:
* Stores accent character passed as a parameter to <accents>
* 0 00 00 --- 0 00 00 no accent
* | | |
* | | ---- 01 psili, 10 dasia, 11 dialytika
* | ------- 01 varia, 10 oxia, 11 perispomeni
* ----------- 1 ypogegrammeni
* Changes: accents
* Caveat: currently only ORs new accent... expects an all-zero accent variable
*
* 15-May-2020 dm -- single acute accent option (Unicode U0370 code block)
*/
void store_accents(unsigned char bufferchar)
{
switch (bufferchar)
{
case ')':
accents = accents | 1;
break;
case '(':
accents = accents | 2;
break;
case '+':
accents = accents | 3;
break;
case '\\':
accents = accents | 4;
break;
case '/':
accents = accents | 8;
break;
case '=':
accents = accents | 0xc;
break;
case '|':
accents = accents | 0x10;
break;
default:
break;
}
accents &= 0x1f;
}
/* mod_accents:
*
* Part of the U0370 character output option:
*
* If accents are acute, diaeresis (dialytica) or a combination of the two
* <accents> which is used as an index to the accented character tables is
* modified for pointing to the alternate character
*
* Changes: accents
*
* 15-May 2020 dm
*/
void mod_accents(void)
{
if (accents == 8) accents = 0x20;
else if (accents == 3) accents = 0x21;
else if (accents == 11) accents = 0x22;
}
/* output_accents:
* Input: <accents>
* 0 00 00 --- 0 00 00 no accent
* | | |
* | | ---- 01 psili, 10 dasia, 11 dialytika
* | ------- 01 varia, 10 oxia, 11 perispomeni
* ----------- 1 ypogegrammeni
* Changes: optr (output_utf)
*/
void output_accents(void)
{
int paccents;
paccents = accents & 3;
if (paccents == 1)
output_utf(PSILI);
else if (paccents == 2)
output_utf(DASIA);
else if (paccents == 3)
output_utf(DIALYTIKA);
paccents = (accents & 0xc) >> 2;
if (paccents == 1)
output_utf(VARIA);
else if (paccents == 2)
output_utf(OXIA);
else if (paccents == 3) {
if (betastate == ROMAN)
output_utf(CARET);
else
output_utf(PERISPOMENI);
}
paccents = accents & 0x10;
if (paccents)
output_utf(YPOGEGRAMMENI);
}
/* getnum:
* Collects a non-zero number from the current <input_buffer> position.
* Returns: an integer or zero if no number found, -1 on end of buffer
* Changes: iptr
* 22-Apr-2006 dm - dropped unsigned attribute from bufferchar and modnumber
*/
int getnum(void)
{
#define MAXNUMBERS 32
char bufferchar;
char modnumber[MAXNUMBERS]; /* symbol or font modifier number string */
int imodnumber = 0; /* index to modnumber */
int convnumber = 0; /* converted modnumber string */
int processing = 1;
modnumber[0] = 0;
while (processing) {
if ( (iptr < INRECSIZE) && (imodnumber < MAXNUMBERS) ) {
bufferchar = input_buffer[iptr++];
if (isdigit(bufferchar)) {
modnumber[imodnumber++] = bufferchar;
} else {
--iptr;
modnumber[imodnumber] = 0;
sscanf(modnumber, "%d", &convnumber);
processing = 0;
}
} else {
convnumber = -1;
processing = 0;
}
}
if (convnumber < 0) perror("\ndid not complete number\n");
return convnumber;
}
/* output_utf2:
* Converts the input code into a UTF-8 byte sequence in output_buffer
* Changes: optr, output_buffer
* NOTE: this is a duplicate of output_utf (in order to avoid recursion)
*/
void output_utf2(int ucode)
{
if ((optr+3) > OUTRECSIZE) {
perror("\noptr out of range");
} else if (ucode == 0){
/* do nothing */
} else if (ucode < 0x80) {
output_buffer[optr++] = ucode;
} else if (ucode < 0x800) {
output_buffer[optr++] = (ucode >> 6) | 0xc0;
output_buffer[optr++] = (ucode & 0x3f) | 0x80;
} else if (ucode <= 0xffff) {
output_buffer[optr++] = ((ucode & 0xf000) >> 12) | 0xe0;
output_buffer[optr++] = ((ucode & 0x0fc0) >> 6) | 0x80;
output_buffer[optr++] = (ucode & 0x3f) | 0x80;
} else if (ucode <= 0x10ffff) {
output_buffer[optr++] = ((ucode & 0x1C0000) >> 18) | 0xF0;
output_buffer[optr++] = ((ucode & 0x03f000) >> 12) | 0x80;
output_buffer[optr++] = ((ucode & 0x000fc0) >> 6) | 0x80;
output_buffer[optr++] = (ucode & 0x3f) | 0x80;
} else {
/* higher codes are not defined for UTF-8*/
}
}
/* output_utf:
* Converts the input code into a UTF-8 byte sequence in output_buffer
* Changes: optr, output_buffer
*/
void output_utf(int ucode)
{
if ((optr+3) > OUTRECSIZE) {
perror("\noptr out of range");
} else if (ucode == 0){
/* do nothing */
} else if (ucode < 0x80) {
output_buffer[optr++] = ucode;
} else if (ucode < 0x800) {
output_buffer[optr++] = (ucode >> 6) | 0xc0;
output_buffer[optr++] = (ucode & 0x3f) | 0x80;
} else if (ucode <= 0xffff) {
output_buffer[optr++] = ((ucode & 0xf000) >> 12) | 0xe0;
output_buffer[optr++] = ((ucode & 0x0fc0) >> 6) | 0x80;
output_buffer[optr++] = (ucode & 0x3f) | 0x80;
} else if (ucode <= 0x10ffff) {
output_buffer[optr++] = ((ucode & 0x1C0000) >> 18) | 0xF0;
output_buffer[optr++] = ((ucode & 0x03f000) >> 12) | 0x80;
output_buffer[optr++] = ((ucode & 0x000fc0) >> 6) | 0x80;
output_buffer[optr++] = (ucode & 0x3f) | 0x80;
} else {
/* higher codes are not defined for UTF-8*/
}
/* Output combining codes for brackets */
if (quasi_bracket_code) output_utf2(quasi_bracket_code);
}
/* output_string:
* Calls output_utf to write a string in <output_buffer>
* Returns: the number of bytes written
* Changes: optr, output_buffer
*/
void output_string(char *outstr)
{
int nextchar;
int cnt;
for (cnt = 0; cnt < strlen(outstr); cnt++) {
output_utf(outstr[cnt]);
}
}
/* handle_escape_codes:
* Formatting and character output based on escape codes: $&%"@#^[]<>{}
* Input: escape code, optional number
* Changes: optr, output_buffer
*/
void handle_escape_codes(unsigned char beta, int number)
{
int temp = 0;
switch (beta)
{
case '$':
betastate = HELLENIC;
accents = 0;
break;
case '&':
betastate = ROMAN;
accents = 0;
break;
case '%':
if (opt_debug_special) printf("%%%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_PUNCTUATION)
output_utf(punctuation[number]);
break;
case '\"':
if (opt_debug_special) printf("\"%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_QUOTATION) {
if (quotation_open[number]) {
output_utf(quotation_close_symbol[number]);
quotation_open[number] = 0;
} else {
output_utf(quotation_open_symbol[number]);
quotation_open[number] = 1;
}
}
break;
case '@':
/* FIXME: If citations are active, paging should be disabled */
if (opt_debug_special) printf("@%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
/* Page formats -- FIXME: incomplete */
if (number == 0) {
output_utf(0x20);
output_utf(0x20);
} else if (number == 1) {
if (opt_page) output_utf(0xc);
//FIXME: reinstate else output_utf(0xa);
} //fixme: reinstate else output_utf(0xa);
break;
case '#':
if (opt_debug_special) printf("#%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_TEXT_SYMBOLS) {
output_utf(text_symbols[number]);
}
break;
case '^':
/* quarter-spaces: will output at least one space */
if (number > 0) temp = number / 4;
while (temp >= 0) {
output_utf(0x20);
temp--;
}
break;
case '[':
if (opt_debug_bracket) printf("[%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_BRACKET) {
output_utf(bracket_open_symbol[number]);
}
break;
case ']':
if (opt_debug_bracket) printf("]%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_BRACKET) {
output_utf(bracket_close_symbol[number]);
}
break;
case '<':
if (opt_debug_bracket) printf("<%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_QUASI_BRACKET) {
if (number == 0 || number == 1 || number == 3 || number == 4 || number == 5 \
|| number == 8 || number == 17 || number == 18) {
quasi_bracket_code = quasi_bracket_open_symbol[number];
} else {
output_utf(quasi_bracket_open_symbol[number]);
}
}
break;
case '>':
if (opt_debug_bracket) printf(">%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_QUASI_BRACKET) {
if (quasi_bracket_code) {
quasi_bracket_code = 0; /* stop outputting combining codes */
} else {
output_utf(quasi_bracket_close_symbol[number]);
}
}
break;
case '{':
if (opt_debug_bracket) printf("{%d -- %s %d.%d.%d\n", number, citation[1], icitation[23], icitation[24], icitation[25]);
if (number < MAX_NON_TEXT) {
output_utf(non_text_open_symbol[number]);
}
break;