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lyx_mirror/development/Win32/packaging/dtl/dt2dv.c
Angus Leeming 3c4ec7b6d5 Add some commentary of what I've done this morning 
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_3_X@10360 a592a061-630c-0410-9148-cb99ea01b6c8
2005-07-27 10:57:57 +00:00

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/* dt2dv - convert human-readable "DTL" file to DVI format
- this is intended to invert dv2dt version 0.6.0
- version 0.6.2 - 27 July 2005
- Geoffrey Tobin G.Tobin@ee.latrobe.edu.au
- fixes: Michal Tomczak-Jaegermann ntomczak@vm.ucs.ualberta.ca
Nelson H. F. Beebe beebe@math.utah.edu
Angus Leeming leeming@lyx.org: Enable dt2dv to handle
.dvi files containing strings longer than 1024 chars.
- Reference: "The DVI Driver Standard, Level 0",
by The TUG DVI Driver Standards Committee.
Appendix A, "Device-Independent File Format".
*/
/* unix version; read from stdin, write to stdout, by default. */
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dtl.h"
/* by default, read and write regular files */
int rd_stdin = 0;
int wr_stdout = 0;
/* maximum number of characters in a DTL input line */
#define MAXLINE 1024
/* input line */
typedef struct
{
COUNT num; /* current line number */
size_t max; /* capacity of buf */
S4 wrote; /* number of characters written into buf */
size_t read; /* position in buf of next character to read from buf */
char * buf; /* line buffer */
} Line;
char linebuf[MAXLINE+1];
Line dtl_line = {0, 0, 0, MAXLINE, linebuf};
/* a DTL token either is:
a quoted string (admitting an escape character),
or BCOM (if that is a nonempty string),
or ECOM (if that is a nonempty string),
or a string _not_ including ECOM_CHAR or space.
*/
/* maximum expected length of a DTL token */
#define MAXTOKLEN 255
typedef char Token[MAXTOKLEN+1];
typedef unsigned char Byte;
typedef char Boolean;
#define true 1
#define false 0
/* command prefixes */
typedef struct
{
Byte first_code;
char * name;
Boolean has_suffix;
Byte first_suffix, last_suffix;
} CmdPrefix;
CmdPrefix cmd_prefixes [] =
{
{0, SETCHAR, true, 0, 127},
{128, SET, true, 1, 4},
{132, SETRULE, false, 0, 0},
{133, PUT, true, 1, 4},
{137, PUTRULE, false, 0, 0},
{138, NOP, false, 0, 0},
{139, BOP, false, 0, 0},
{140, EOP, false, 0, 0},
{141, PUSH, false, 0, 0},
{142, POP, false, 0, 0},
{143, RIGHT, true, 1, 4},
{147, W, true, 0, 4},
{152, X, true, 0, 4},
{157, DOWN, true, 1, 4},
{161, Y, true, 0, 4},
{166, Z, true, 0, 4},
{171, FONTNUM, true, 0, 63},
{235, FONT, true, 1, 4},
{239, SPECIAL, true, 1, 4},
{243, FONTDEF, true, 1, 4},
{247, PRE, false, 0, 0},
{248, POST, false, 0, 0},
{249, POSTPOST, false, 0, 0},
{250, OPCODE, true, 250, 255}
};
/* cmd_prefixes[] */
/* Number of DVI commands, including those officially undefined */
#define NCMDS 256
/* table of command name (string) pointers */
typedef char * CmdTable [NCMDS];
/* initially all command name pointers are NULL */
CmdTable cmd_table;
/* operation's opcode, name, number of args, string of arguments. */
typedef struct
{
int code;
char * name;
int nargs;
char * args;
} op_info;
/* name of table, first opcode, last opcode, pointer to opcode info. */
typedef struct
{
char * name;
int first;
int last;
op_info * list;
} op_table;
/* Table for opcodes 128 to 170 inclusive. */
op_info op_info_128_170 [] =
{
{128, SET1, 1, "1"},
{129, SET2, 1, "2"},
{130, SET3, 1, "3"},
{131, SET4, 1, "-4"},
{132, SETRULE, 2, "-4 -4"},
{133, PUT1, 1, "1"},
{134, PUT2, 1, "2"},
{135, PUT3, 1, "3"},
{136, PUT4, 1, "-4"},
{137, PUTRULE, 2, "-4 -4"},
{138, NOP, 0, ""},
/* bop: not counting last argument, a signed address: */
{139, BOP, 10, "-4 -4 -4 -4 -4 -4 -4 -4 -4 -4"},
{140, EOP, 0, ""},
{141, PUSH, 0, ""},
{142, POP, 0, ""},
{143, RIGHT1, 1, "-1"},
{144, RIGHT2, 1, "-2"},
{145, RIGHT3, 1, "-3"},
{146, RIGHT4, 1, "-4"},
{147, W0, 0, ""},
{148, W1, 1, "-1"},
{149, W2, 1, "-2"},
{150, W3, 1, "-3"},
{151, W4, 1, "-4"},
{152, X0, 0, ""},
{153, X1, 1, "-1"},
{154, X2, 1, "-2"},
{155, X3, 1, "-3"},
{156, X4, 1, "-4"},
{157, DOWN1, 1, "-1"},
{158, DOWN2, 1, "-2"},
{159, DOWN3, 1, "-3"},
{160, DOWN4, 1, "-4"},
{161, Y0, 0, ""},
{162, Y1, 1, "-1"},
{163, Y2, 1, "-2"},
{164, Y3, 1, "-3"},
{165, Y4, 1, "-4"},
{166, Z0, 0, ""},
{167, Z1, 1, "-1"},
{168, Z2, 1, "-2"},
{169, Z3, 1, "-3"},
{170, Z4, 1, "-4"}
};
/* op_info op_info_128_170 [] */
op_table op_128_170 = {"op_128_170", 128, 170, op_info_128_170};
/* Table for fnt1 to fnt4 (opcodes 235 to 238) inclusive. */
op_info fnt_n [] =
{
{235, FONT1, 1, "1"},
{236, FONT2, 1, "2"},
{237, FONT3, 1, "3"},
{238, FONT4, 1, "-4"}
};
/* op_info fnt_n [] */
op_table fnt = {FONT, 235, 238, fnt_n};
/* Function prototypes */
Void mem_viol ARGS((int sig));
Void give_help (VOID);
int parse ARGS((char * s));
Void process ARGS((char * s));
Void no_op (VOID);
Void dtl_stdin (VOID);
Void dvi_stdout (VOID);
int open_dtl ARGS((char * dtl_file, FILE ** pdtl));
int open_dvi ARGS((char * dvi_file, FILE ** pdvi));
int dt2dv ARGS((FILE * dtl, FILE * dvi));
Void * gmalloc ARGS((long int size));
Void dinfo (VOID);
Void dexit ARGS((int n));
int cons_cmds ARGS((int nprefixes, CmdPrefix * prefix, CmdTable cmds));
Void free_cmds ARGS((CmdTable cmd_table));
int get_line ARGS((FILE * fp, Line * line, int max));
int read_line_char ARGS((FILE * fp, int * ch));
int read_char ARGS((FILE * fp, int * ch));
int unread_char (VOID);
int read_string_char ARGS((FILE * fp, int * ch));
COUNT read_variety ARGS((FILE * dtl));
COUNT read_token ARGS((FILE * dtl, char * token));
COUNT skip_space ARGS((FILE * fp, int * ch));
COUNT read_misc ARGS((FILE * fp, Token token));
COUNT read_mes ARGS((FILE * fp, char * token));
int find_command ARGS((char * command, int * opcode));
int xfer_args ARGS((FILE * dtl, FILE * dvi, int opcode));
int set_seq ARGS((FILE * dtl, FILE * dvi));
int check_byte ARGS((int byte));
int put_byte ARGS((int onebyte, FILE * dvi));
U4 xfer_hex ARGS((int n, FILE * dtl, FILE * dvi));
U4 xfer_oct ARGS((int n, FILE * dtl, FILE * dvi));
U4 xfer_unsigned ARGS((int n, FILE * dtl, FILE * dvi));
S4 xfer_signed ARGS((int n, FILE * dtl, FILE * dvi));
int check_bmes ARGS((FILE * dtl));
int check_emes ARGS((FILE * dtl));
Void init_Lstring ARGS((Lstring * lsp, long int n));
Void de_init_Lstring ARGS((Lstring * lsp));
Lstring * alloc_Lstring ARGS((long int n));
Void free_Lstring ARGS((Lstring * lstr));
Void ls_putb ARGS((int ch, Lstring * lstr));
S4 get_Lstring ARGS((FILE * dtl, Lstring * lstr));
Void put_Lstring ARGS((const Lstring * lstr, FILE * dvi));
U4 xfer_len_string ARGS((int n, FILE * dtl, FILE * dvi));
U4 get_unsigned ARGS((FILE * dtl));
S4 get_signed ARGS((FILE * dtl));
int put_unsigned ARGS((int n, U4 unum, FILE * dvi));
int put_signed ARGS((int n, S4 snum, FILE * dvi));
S4 xfer_bop_address ARGS((FILE * dtl, FILE * dvi));
S4 xfer_postamble_address ARGS((FILE * dtl, FILE * dvi));
int put_table ARGS((op_table table, int opcode, FILE * dtl, FILE * dvi));
U4 special ARGS((FILE * dtl, FILE * dvi, int n));
int fontdef ARGS((FILE * dtl, FILE * dvi, int n));
U4 preamble ARGS((FILE * dtl, FILE * dvi));
int postamble ARGS((FILE * dtl, FILE * dvi));
int post_post ARGS((FILE * dtl, FILE * dvi));
typedef struct
{
char * keyword; /* command line option keyword */
int * p_var; /* pointer to option variable */
char * desc; /* description of keyword and value */
Void (* p_fn) (VOID); /* pointer to function called when option is set */
} Options;
Options opts[] =
{
{"-debug", &debug, "detailed debugging", no_op},
{"-group", &group, "each DTL command is in parentheses", no_op},
{"-si", &rd_stdin, "read all DTL commands from standard input", dtl_stdin},
{"-so", &wr_stdout, "write all DVI commands to standard output", dvi_stdout},
{NULL, NULL, NULL, NULL}
};
/* opts[] */
char * progname = ""; /* intended for name of this program */
int nfile = 0; /* number of filename arguments on the command line */
#define PRINT_PROGNAME fprintf (stderr, "%s ", progname)
/* Harbison & Steele (1991) warn that some C implementations */
/* of free() do not treat NULL pointers correctly. */
#define gfree(p) {if (p) free (p);}
FILE * dtl_fp = NULL;
FILE * dvi_fp = NULL;
char * dtl_filename = "";
char * dvi_filename = "";
int
main
#ifdef STDC
(int argc, char * argv[])
#else
(argc, argv)
int argc;
char * argv[];
#endif
{
Void (*handler) ARGS((int)); /* Previous signal handler */
int i;
progname = argv[0]; /* name of this program */
/* memory violation signal handler */
handler = (Void (*) ARGS((int))) signal (SIGSEGV, mem_viol);
#ifndef __DATE__
#define __DATE__ ""
#endif
#ifndef __TIME__
#define __TIME__ ""
#endif
#if STDC
#define C_LEVEL ""
#else /* NOT STDC */
#define C_LEVEL "non-"
#endif /* NOT STDC */
/* message about program and compiler */
/* NB: LTU EE's Sun/OS library is BSD, even though gcc 2.2.2 is ANSI */
fprintf (stderr, "\n");
fprintf (stderr,
"Program \"%s\" version %s compiled %s %s in %sstandard C.\n",
progname, VERSION, __DATE__, __TIME__, C_LEVEL);
/* interpret command line arguments */
nfile = 0;
dtl_fp = dvi_fp = NULL;
dtl_filename = dvi_filename = "";
for (i=1; i < argc; i++)
{
/* parse options, followed by any explicit filenames */
parse (argv[i]);
}
if (nfile != 2) /* not exactly two files specified, so give help */
give_help();
else
/* the real works */
dt2dv (dtl_fp, dvi_fp);
return 0; /* OK */
}
/* end main */
Void
mem_viol
#ifdef STDC
(int sig)
#else
(sig)
int sig;
#endif
{
Void (* handler) ARGS((int));
handler = (Void (*) ARGS((int))) signal (SIGSEGV, mem_viol);
if (sig != SIGSEGV)
{
PRINT_PROGNAME;
fprintf (stderr,
"(mem_viol) : called with wrong signal!\n");
}
PRINT_PROGNAME;
fprintf (stderr, "(mem_viol) : RUNTIME MEMORY ERROR : memory violation, ");
fprintf (stderr, "dtl line >= ");
fprintf (stderr, WF, dtl_line.num);
fprintf (stderr, "\n");
dexit (1);
}
/* mem_viol */
Void
give_help (VOID)
{
int i;
char * keyword;
fprintf (stderr, "usage: ");
PRINT_PROGNAME;
fprintf (stderr, "[options] dtl_file dvi_file");
fprintf (stderr, "\n");
for (i=0; (keyword = opts[i].keyword) != NULL; i++)
{
fprintf (stderr, " ");
fprintf (stderr, "[%s]", keyword);
fprintf (stderr, " ");
fprintf (stderr, "%s", opts[i].desc);
fprintf (stderr, "\n");
}
fprintf (stderr, "Messages, like this one, go to stderr.\n");
}
/* give_help */
Void no_op (VOID)
/* do nothing */
{
}
Void dtl_stdin (VOID)
{
extern FILE * dtl_fp;
extern int nfile;
dtl_fp = stdin;
dtl_filename = "Standard Input";
++ nfile;
}
Void dvi_stdout (VOID)
{
extern FILE * dvi_fp;
extern int nfile;
/* ! Perilous to monitors! */
dvi_fp = stdout;
dvi_filename = "Standard Output";
++ nfile;
}
int
parse
#ifdef STDC
(char * s)
#else
(s)
char * s;
#endif
/* parse one command-line argument, `s' */
{
int i;
char * keyword;
for (i=0; (keyword = opts[i].keyword) != NULL; i++)
{
if (strncmp (s, keyword, strlen (keyword)) == 0)
{
Void (*pfn) (VOID);
(*(opts[i].p_var)) = 1; /* turn option on */
if ((pfn = opts[i].p_fn) != NULL)
(*pfn) (); /* call option function */
return i;
}
}
/* reached here, so not an option: assume it's a filename */
process (s);
return i;
}
/* parse */
int
open_dtl
#ifdef STDC
(char * dtl_file, FILE ** pdtl)
#else
(dtl_file, pdtl)
char * dtl_file;
FILE ** pdtl;
#endif
/* I: dtl_file; I: pdtl; O: *pdtl. */
{
extern char * dtl_filename;
dtl_filename = dtl_file;
if (dtl_filename == NULL)
{
PRINT_PROGNAME;
fprintf (stderr,
"(open_dtl) : INTERNAL ERROR : dtl file's name is NULL.\n");
dexit (1);
}
if (pdtl == NULL)
{
PRINT_PROGNAME;
fprintf (stderr,
"(open_dtl) : INTERNAL ERROR : address of dtl variable is NULL.\n");
dexit (1);
}
*pdtl = fopen (dtl_file, "r");
if (*pdtl == NULL)
{
PRINT_PROGNAME;
fprintf (stderr,
"(open_dtl) : DTL FILE ERROR : Cannot open \"%s\" for text reading.\n",
dtl_file);
dexit (1);
}
return 1; /* OK */
}
/* open_dtl */
int
open_dvi
#ifdef STDC
(char * dvi_file, FILE ** pdvi)
#else
(dvi_file, pdvi)
char * dvi_file;
FILE ** pdvi;
#endif
/* I: dvi_file; I: pdvi; O: *pdvi. */
{
extern char * dvi_filename;
dvi_filename = dvi_file;
if (dvi_filename == NULL)
{
PRINT_PROGNAME;
fprintf (stderr,
"(open_dvi) : INTERNAL ERROR : dvi file's name is NULL.\n");
dexit (1);
}
if (pdvi == NULL)
{
PRINT_PROGNAME;
fprintf (stderr,
"(open_dvi) : INTERNAL ERROR : address of dvi variable is NULL.\n");
dexit (1);
}
*pdvi = fopen (dvi_file, "wb");
if (*pdvi == NULL)
{
PRINT_PROGNAME;
fprintf (stderr,
"(open_dvi) : DVI FILE ERROR : Cannot open \"%s\" for binary writing.\n",
dvi_file);
dexit (1);
}
return 1; /* OK */
}
/* open_dvi */
Void
process
#ifdef STDC
(char * s)
#else
(s)
char * s;
#endif
{
extern FILE * dtl_fp, * dvi_fp;
extern int nfile;
if (dtl_fp == NULL) /* first filename assumed to be DTL input */
{
open_dtl (s, &dtl_fp);
}
else if (dvi_fp == NULL) /* second filename assumed to be DVI output */
{
open_dvi (s, &dvi_fp);
}
else
{
PRINT_PROGNAME;
fprintf (stderr, "(process) : at most two filenames allowed.\n");
exit (1);
}
++ nfile;
}
/* process */
COUNT dtl_read = 0; /* bytes read from dtl file */
COUNT dvi_written = 0; /* bytes written to dvi file */
word_t last_bop_address = -1; /* byte address of last bop; first bop uses -1 */
word_t postamble_address = -1; /* byte address of postamble */
COUNT ncom = 0; /* commands successfully read and interpreted from dtl file */
COUNT com_read = 0; /* bytes read in current (command and arguments), */
/* since and including the opening BCOM_CHAR, if any */
int
put_byte
#ifdef STDC
(int byte, FILE * dvi)
#else
(byte, dvi)
int byte;
FILE * dvi;
#endif
/* write byte into dvi file */
{
check_byte (byte);
/* if (fprintf (dvi, "%c", byte) != 1) */
if (fprintf (dvi, "%c", byte) < 0)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_byte) : DVI FILE ERROR (%s) : cannot write to dvi file.\n",
dtl_filename);
dexit (1);
}
++ dvi_written;
return 1; /* OK */
}
/* put_byte */
int
dt2dv
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
{
int nprefixes = 0; /* number of prefixes in cmd_prefixes[] list. */
static Token dtl_cmd = ""; /* DTL command name */
COUNT nread = 0; /* number of bytes read by a function from dtl file. */
nprefixes = sizeof (cmd_prefixes) / sizeof (CmdPrefix);
/* Construct array of all NCMDS == 256 DTL commands */
(Void) cons_cmds (nprefixes, cmd_prefixes, cmd_table);
/* DTL commands have the form "[ ]*command arg ... arg[ ]*", */
/* possibly enclosed in a BCOM, ECOM pair, */
/* and are separated by optional whitespace, typically newlines. */
/* That is, each command and its arguments are parenthesised, */
/* with optional spaces after the BCOM and before the ECOM, if any. */
/* dt2dv is now at the very start of the DTL file */
dtl_line.num = 0;
dtl_read = 0;
/* The very first thing should be the "variety" signature */
nread = read_variety (dtl);
/* while not end of dtl file or reading error, */
/* read, interpret, and write commands */
while (!feof (dtl))
{
int opcode;
com_read = 0;
if (group)
{
/* BCOM check */
static Token token = ""; /* DTL token */
nread = read_token (dtl, token);
/* test for end of input, or reading error */
if (strlen (token) == 0)
{
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(dt2dv) : end of input, or reading error.\n");
}
break;
}
/* test whether this command begins correctly */
else if (strcmp (token, BCOM) != 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(dt2dv) : DTL FILE ERROR (%s) : ", dtl_filename);
fprintf (stderr, "command must begin with \"%s\", ", BCOM);
fprintf (stderr, "not `%c' (char %d).\n", token[0], token[0]);
dexit (1);
}
/* end BCOM check */
}
/* read the command name */
nread = read_token (dtl, dtl_cmd);
/* test for end of input, or reading error */
if (strlen (dtl_cmd) == 0)
{
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr,
"(dt2dv) : end of input, or reading error.\n");
}
break;
}
else
{
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(dt2dv) : command ");
fprintf (stderr, WF, ncom);
fprintf (stderr, " = \"%s\".\n", dtl_cmd);
}
/* find opcode for this command */
if (find_command (dtl_cmd, &opcode) == 1)
{
/* write the opcode, if we can */
put_byte (opcode, dvi);
/* treat the arguments, if any */
xfer_args (dtl, dvi, opcode);
}
else if (dtl_cmd[0] == BSEQ_CHAR)
{
/* sequence of font characters for SETCHAR */
set_seq (dtl, dvi);
}
else
{
PRINT_PROGNAME;
fprintf (stderr,
"(dt2dv) : DTL FILE ERROR (%s) : unknown command \"%s\".\n",
dtl_filename, dtl_cmd);
dexit (1);
}
}
if (group)
{
/* seek ECOM after command's last argument and optional whitespace */
static Token token = ""; /* DTL token */
nread = read_token (dtl, token);
/* test for end of input, or reading error */
if (strlen (token) == 0)
{
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr,
"(dt2dv) : end of input, or reading error.\n");
}
break;
}
if (strcmp (token, ECOM) != 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(dt2dv) : DTL FILE ERROR (%s) : ", dtl_filename);
fprintf (stderr, "ECOM (\"%s\") expected, not `%c' (char %d).\n",
ECOM, token[0], token[0]);
dexit (1);
}
/* end ECOM check */
}
++ ncom; /* one more command successfully read and interpreted */
}
/* end while */
PRINT_PROGNAME;
fprintf (stderr, "(dt2dv) :\n");
fprintf (stderr, "Read (from file \"%s\") ", dtl_filename);
fprintf (stderr, WF, dtl_read);
fprintf (stderr, " DTL bytes (");
fprintf (stderr, UF4, dtl_line.num);
fprintf (stderr, " lines);\n");
fprintf (stderr, "wrote (to file \"%s\") ", dvi_filename);
fprintf (stderr, WF, dvi_written);
fprintf (stderr, " DVI bytes;\n");
fprintf (stderr, "completely interpreted ");
fprintf (stderr, WF, ncom);
fprintf (stderr, " DVI command%s.\n", (ncom == 1 ? "" : "s"));
fprintf (stderr, "\n");
(Void) free_cmds (cmd_table);
return 1; /* OK */
}
/* dt2dv */
Void *
gmalloc
#ifdef STDC
(long int size)
#else
(size)
long int size;
#endif
{
Void * p = NULL;
if (size < 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(gmalloc) : INTERNAL ERROR : ");
fprintf (stderr,
"unreasonable request to malloc %ld bytes\n",
size);
dexit (1);
}
p = (Void *) malloc ((size_t) size);
if (p == NULL)
{
PRINT_PROGNAME;
fprintf (stderr, "(gmalloc) : MEMORY ALLOCATION ERROR : ");
fprintf (stderr,
"operating system failed to malloc %ld bytes\n",
size);
dexit (1);
}
return (p);
}
/* gmalloc */
Void
dinfo (VOID)
{
PRINT_PROGNAME;
fprintf (stderr, "(dinfo) : ");
fprintf (stderr, "Current DTL input line ");
fprintf (stderr, UF4, dtl_line.num);
fprintf (stderr, " :\n");
fprintf (stderr, "\"%s\"\n", dtl_line.buf);
fprintf (stderr, "Read ");
fprintf (stderr, WF, dtl_read);
fprintf (stderr, " DTL bytes (");
fprintf (stderr, WF, com_read);
fprintf (stderr, " in current command), wrote ");
fprintf (stderr, WF, dvi_written);
fprintf (stderr, " DVI bytes.\n");
fprintf (stderr, "Successfully interpreted ");
fprintf (stderr, WF, ncom);
fprintf (stderr, " DVI command%s.\n", (ncom == 1 ? "" : "s"));
}
/* dinfo */
Void
dexit
#ifdef STDC
(int n)
#else
(n)
int n;
#endif
{
dinfo();
PRINT_PROGNAME;
fprintf (stderr, "(dexit) : exiting with status %d.\n", n);
exit (n);
}
/* dexit */
int
cons_cmds
#ifdef STDC
(int nprefixes, CmdPrefix * prefix, CmdTable cmds)
#else
(nprefixes, prefix, cmds)
int nprefixes;
CmdPrefix * prefix;
CmdTable cmds;
#endif
{
int code; /* first opcode for a given command prefix */
int opcode; /* command's opcode */
int nsuffixes; /* number of commands with a given prefix */
int isuffix; /**** integer suffix, of at most three digits ****/
String suffix; /* suffix string generated from integer suffix */
size_t plen = 0; /* prefix length */
size_t slen; /* suffix length */
size_t clen; /* whole command name length */
int i, j; /* loop indices */
for (i=0; i < nprefixes; prefix++, i++)
{
code = prefix->first_code;
if (code < 0 || code > 255)
{
PRINT_PROGNAME;
fprintf (stderr, "(cons_cmds) : INTERNAL ERROR : ");
fprintf (stderr,
"prefix listed internally with code = %d, must be 0 to 255\n",
code);
dexit (1);
}
if (prefix->has_suffix)
{
plen = strlen (prefix->name);
/**** Suffixes in DTL are Integers, in Sequence */
if (prefix->last_suffix < prefix->first_suffix)
{
PRINT_PROGNAME;
fprintf (stderr, "(cons_cmds) : INTERNAL ERROR : ");
fprintf (stderr,
"prefix's last suffix %d < first suffix (%d)\n",
prefix->last_suffix, prefix->first_suffix);
dexit (1);
}
nsuffixes = prefix->last_suffix - prefix->first_suffix + 1;
opcode = prefix->first_code;
for (j=0; j < nsuffixes; j++, opcode++)
{
isuffix = prefix->first_suffix + j;
if (0 <= code && code <= 127) /* SETCHAR */
{
/* SETCHAR's suffix is written in uppercase hexadecimal */
sprintf (suffix, "%02X", isuffix);
}
else /* 128 <= code && code <= 255 */ /* other DTL commands */
{
/* other commands' suffices are written in decimal */
sprintf (suffix, "%d", isuffix);
}
slen = strlen (suffix);
clen = plen + slen;
cmds[opcode] = (char *) gmalloc (clen+1);
strcpy (cmds[opcode], prefix->name);
strcat (cmds[opcode], suffix);
}
}
else /* command name = prefix */
{
plen = strlen (prefix->name);
clen = plen;
opcode = prefix->first_code;
cmds[opcode] = (char *) gmalloc (clen+1);
strcpy (cmds[opcode], prefix->name);
}
}
return 1; /* OK */
}
/* cons_cmds */
Void
free_cmds
#ifdef STDC
(CmdTable cmd_table)
#else
(cmd_table)
CmdTable cmd_table;
#endif
{
int i;
for (i=0; i < NCMDS; i++)
gfree (cmd_table[i]);
}
/* free_cmds */
int
get_line
#ifdef STDC
(FILE * fp, Line * line, int max)
#else
(fp, line, max)
FILE * fp;
Line * line;
int max;
#endif
/* read a (Line *) line from fp, return length */
/* adapted from K&R (second, alias ANSI C, edition, 1988), page 165 */
{
if (fgets (line->buf, max, fp) == NULL)
return 0;
else
{
++ line->num;
line->wrote = strlen (line->buf);
line->read = 0;
return 1;
}
}
/* get_line */
int
read_line_char
#ifdef STDC
(FILE * fp, int * ch)
#else
(fp, ch)
FILE * fp;
int * ch;
#endif
/* read one character from dtl_line if possible, */
/* otherwise read another dtl_line from fp */
/* return 1 if a character is read, 0 if at end of fp file */
{
extern Line dtl_line;
if (dtl_line.wrote == 0 || dtl_line.read >= dtl_line.wrote)
{
int line_status;
/* refill line buffer */
line_status = get_line (fp, &dtl_line, MAXLINE);
if (line_status == 0)
{
/* at end of DTL file */
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(read_line_char) : end of DTL file\n");
dinfo();
}
return 0;
}
else
{
/* new DTL line was read */
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(read_line_char) : new DTL input line:\n");
fprintf (stderr, "\"%s\"\n", dtl_line.buf);
}
}
}
*ch = dtl_line.buf [dtl_line.read ++];
++ dtl_read;
++ com_read; /* count another DTL command character */
return 1;
}
/* read_line_char */
int
read_char
#ifdef STDC
(FILE * fp, int * ch)
#else
(fp, ch)
FILE * fp;
int * ch;
#endif
/* Read next character, if any, from file fp. */
/* Write it into *ch. */
/* If no character is read, then *ch value < 0. */
/* Return 1 if OK, 0 if EOF or error. */
{
int status = 1;
int c; /* in case ch points awry, we still have something in c. */
c = EOF;
if (read_line_char (fp, &c) == 0)
{
/* end of fp file, or error reading it */
status = 0;
}
else
{
if (c > 255)
{
PRINT_PROGNAME;
fprintf (stderr,
"(read_char) : character %d not in range 0 to 255\n",
c);
dinfo();
status = 0;
}
else if ( ! isprint (c) && ! isspace (c))
{
PRINT_PROGNAME;
fprintf (stderr,
"(read_char) : character %d %s.\n",
c,
"not printable and not white space");
dinfo();
status = 0;
}
}
*ch = c;
return status;
}
/* read_char */
COUNT
read_variety
#ifdef STDC
(FILE * dtl)
#else
(dtl)
FILE * dtl;
#endif
/* read and check DTL variety signature */
/* return number of DTL bytes written */
/* DTL variety is _NEVER_ grouped by BCOM and ECOM. */
/* Uniformity here enables the program easily to modify its behavior. */
{
COUNT vread = 0; /* number of DTL bytes read by read_variety */
COUNT nread = 0; /* number of DTL bytes read by read_token */
static Token token = "";
/* read the DTL VARIETY keyword */
nread = read_token (dtl, token);
vread += nread;
/* test whether signature begins correctly */
if (strcmp (token, "variety") != 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(read_variety) : DTL FILE ERROR (%s) : ", dtl_filename);
fprintf (stderr, "DTL signature must begin with \"%s\", not \"%s\".\n",
"variety", token);
dexit (1);
}
/* read the DTL variety */
nread = read_token (dtl, token);
vread += nread;
/* test whether variety is correct */
if (strcmp (token, VARIETY) != 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(read_variety) : DTL FILE ERROR (%s) : ", dtl_filename);
fprintf (stderr, "DTL variety must be \"%s\", not \"%s\".\n",
VARIETY, token);
dexit (1);
}
PRINT_PROGNAME;
fprintf (stderr, "(read_variety) : DTL variety %s is OK.\n", VARIETY);
return vread; /* OK */
}
/* read_variety */
COUNT
skip_space
#ifdef STDC
(FILE * fp, int * ch)
#else
(fp, ch)
FILE * fp;
int * ch;
#endif
/* Skip whitespace characters in file fp. */
/* Write in *ch the last character read from fp, */
/* or < 0 if fp could not be read. */
/* Return number of characters read from fp. */
{
int c; /* character read (if any) */
COUNT count; /* number (0 or more) of whitespace characters read */
int nchar; /* number (0 or 1) of characters read by read_char */
/* loop ends at: end of fp file, or reading error, or not a white space */
for (count=0; ((nchar = read_char (fp, &c)) == 1 && isspace (c)); ++count)
{
/* otherwise, more white spaces to skip */
if (debug)
{
/* report when each DTL end of line is reached */
if (c == '\n')
{
PRINT_PROGNAME;
fprintf (stderr, "(skip_space) : ");
fprintf (stderr, "end of DTL line (at least) ");
fprintf (stderr, WF, dtl_line.num);
fprintf (stderr, "\n");
}
}
}
if (nchar == 0)
{
c = -1;
}
*ch = c; /* c will be < 0 if read_char could not read fp */
return (count + nchar);
}
/* skip_space */
COUNT
read_token
#ifdef STDC
(FILE * dtl, char * token)
#else
(dtl, token)
FILE * dtl;
char * token;
#endif
/* read next token from dtl file. */
/* return number of DTL bytes read. */
/* A token is one of:
a string from BMES_CHAR to the next unescaped EMES_CHAR, inclusive;
BCOM or ECOM, unless these are empty strings;
BSEQ or ESEQ;
any other sequence of non-whitespace characters.
*/
{
COUNT nread; /* number of DTL bytes read by read_token */
int ch; /* most recent character read */
nread = 0;
/* obtain first non-space character */
/* add to nread the number of characters read from dtl by skip_space */
nread += skip_space (dtl, &ch);
if (ch < 0)
{
/* end of dtl file */
/* write an empty token */
strcpy (token, "");
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(read_token) : end of dtl file.\n");
}
}
else if (group && ch == BCOM_CHAR)
{
strcpy (token, BCOM);
}
else if (group && ch == ECOM_CHAR)
{
strcpy (token, ECOM);
}
else
{
token[0] = ch;
token[1] = '\0';
if (ch == BMES_CHAR) /* string token; read until unescaped EMES_CHAR */
{
nread += read_mes (dtl, token+1);
}
else if (ch == BSEQ_CHAR || ch == ESEQ_CHAR)
{
/* token is complete */
}
else /* any other string not containing (ECOM_CHAR or) whitespace */
{
nread += read_misc (dtl, token+1);
}
}
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(read_token) : token = \"%s\"\n", token);
}
return (nread); /* number of bytes read from dtl file */
}
/* read_token */
#define CHAR_OK 1
#define CHAR_FAIL 0
#define CHAR_EOS (-1)
int
read_string_char
#ifdef STDC
(FILE * fp, int * ch)
#else
(fp, ch)
FILE * fp;
int * ch;
#endif
{
int status = CHAR_OK; /* OK so far */
int c;
if (read_char (fp, &c) == 0)
status = CHAR_FAIL; /* fail */
if (c == EMES_CHAR) /* end-of-string char */
{
status = CHAR_EOS; /* end of string */
}
else if (c == ESC_CHAR) /* escape character */
{
/* accept the next character literally, even ESC_CHAR and EMES_CHAR */
if (read_char (fp, &c) == 0)
status = CHAR_FAIL; /* fail */
}
*ch = c;
return status;
}
/* read_string_char */
COUNT
read_misc
#ifdef STDC
(FILE * fp, Token token)
#else
(fp, token)
FILE * fp;
Token token;
#endif
{
int c;
int count;
/* loop ends at: end of fp file, or reading error, or a space */
for (count=0; count <= MAXTOKLEN; ++count)
{
if (read_char (fp, &c) == 0 || isspace (c))
break;
if (group && c == ECOM_CHAR)
{
(Void) unread_char ();
break;
}
token[count] = c;
}
token[count] = '\0';
return count;
}
/* read_misc */
COUNT
read_mes
#ifdef STDC
(FILE * fp, char * token)
#else
(fp, token)
FILE * fp;
char * token;
#endif
/* called **AFTER** a BMES_CHAR has been read */
/* read file fp for characters up to next unescaped EMES_CHAR */
/* this is called a "string token" */
/* write string, including EMES_CHAR, into token[] */
/* return number of characters read from fp */
{
COUNT dtl_count; /* number of DTL characters read by read_mes from fp */
int more; /* flag more == 0 to terminate loop */
int escape; /* flag escape == 1 if previous character was ESC_CHAR */
int ch; /* current DTL character */
escape = 0;
more = 1;
dtl_count = 0;
while (more)
{
if (read_char (fp, &ch) == 0)
{
/* end of fp file, or reading error */
more = 0;
}
else /* error checking passed */
{
++ dtl_count;
if (ch == EMES_CHAR && escape == 0) /* end of string */
{
/* include final EMES_CHAR */
* token ++ = ch;
more = 0;
}
else if (ch == ESC_CHAR && escape == 0)
{
/* next character is not end of string */
escape = 1;
}
else
{
/* store any other character, */
/* including escaped EMES_CHAR and ESC_CHAR*/
* token ++ = ch;
escape = 0;
}
}
}
* token = '\0';
return dtl_count;
}
/* read_mes */
int
unread_char (VOID)
/* wind input back, to allow rereading of one character */
/* return 1 if this works, 0 on error */
{
extern Line dtl_line;
int status;
if (dtl_line.read > 0)
{
-- dtl_line.read; /* back up one character in dtl_line */
-- dtl_read; /* correct the count of DTL characters */
-- com_read; /* count another DTL command character */
status = 1; /* OK */
}
else /* current DTL line is empty */
{
status = 0; /* error */
}
return status;
}
/* unread_char */
int
find_command
#ifdef STDC
(char * command, int * opcode)
#else
(command, opcode)
char * command;
int * opcode;
#endif
{
int found;
int i;
found = 0;
for (i=0; i < NCMDS; i++)
{
if ((cmd_table[i] != 0) && (strcmp (command, cmd_table[i]) == 0))
{
found = 1;
break;
}
}
*opcode = i;
return found;
}
/* find_command */
int
check_byte
#ifdef STDC
(int byte)
#else
(byte)
int byte;
#endif
{
if (byte < 0 || byte > 255)
{
PRINT_PROGNAME;
fprintf (stderr, "(check_byte) : INTERNAL ERROR : ");
fprintf (stderr, "byte %d not in the range of 0 to 255.\n", byte);
dexit (1);
}
return 1; /* OK */
}
/* check_byte */
int
xfer_args
#ifdef STDC
(FILE * dtl, FILE * dvi, int opcode)
#else
(dtl, dvi, opcode)
FILE * dtl;
FILE * dvi;
int opcode;
#endif
{
int n;
if (opcode >= 0 && opcode <= 127)
; /* SETCHAR uses no data */
else if (opcode >= 128 && opcode <= 170)
{
word_t this_bop_address = last_bop_address;
if (opcode == 139) /* BOP */
{
this_bop_address = dvi_written - 1;
}
put_table (op_128_170, opcode, dtl, dvi);
if (opcode == 139) /* BOP */
{
xfer_bop_address (dtl, dvi);
last_bop_address = this_bop_address;
}
}
else if (opcode >= 171 && opcode <= 234)
; /* FONTNUM uses no data */
else if (opcode >= 235 && opcode <= 238)
put_table (fnt, opcode, dtl, dvi);
else if (opcode >= 239 && opcode <= 242)
{
n = opcode - 238;
special (dtl, dvi, n);
}
else if (opcode >= 243 && opcode <= 246)
{
n = opcode - 242;
fontdef (dtl, dvi, n);
}
else if (opcode == 247)
preamble (dtl, dvi);
else if (opcode == 248)
postamble (dtl, dvi);
else if (opcode == 249)
post_post (dtl, dvi);
else if (opcode >= 250 && opcode <= 255)
; /* these, undefined, opcodes use no data */
else
{
PRINT_PROGNAME;
fprintf (stderr,
"(xfer_args) : opcode %d not handled.\n",
opcode);
}
return 1; /* OK */
}
/* xfer_args */
int
set_seq
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
/* Called _after_ a BSEQ_CHAR command */
/* Read bytes from dtl file, */
/* writing corresponding SETCHAR or SET1 commands to DVI file, */
/* _until_ unescaped ESEQ_CHAR is found */
/* Return 1 if OK, 0 on error */
/**** dt2dv assumes 8 bit characters, ****/
/**** but some day one might change that. ****/
{
int status = 1; /* status = 1 if OK, 0 if error */
int more; /* sequence of font characters continuing? */
int escape = 0; /* flag set if previous character was an escape */
int ch; /* character read from DTL file */
more = 1;
while (more)
{
/* ignore read_char status, to allow unprintable characters */
(Void) read_char (dtl, &ch);
/* but check for end of dtl file, or serious file reading error */
if (ch < 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(set_seq) : ");
fprintf (stderr, "end of dtl file, ");
fprintf (stderr, "or serious dtl file reading error\n");
dinfo();
more = 0;
status = 0; /* bad news */
}
else /* read dtl file, okay */
{
if (ch == ESC_CHAR && escape == 0) /* escape next character */
{
escape = 1;
}
else
{
if (ch == ESEQ_CHAR && escape == 0) /* end of sequence */
{
more = 0;
}
else if (ch <= 127) /* can use SETCHAR */
{
put_byte (ch, dvi);
}
else if (ch <= 255) /* can use SET1 */
{
put_byte (128, dvi); /* SET1 opcode */
put_unsigned (1, (U4) ch, dvi);
}
else
{
PRINT_PROGNAME;
fprintf (stderr, "(set_seq) : ");
fprintf (stderr,
"ERROR : DTL character %d is not in range 0 to 255\n",
ch);
dexit (1);
more = 0;
status = 0; /* Error, because dt2dv assumes 8 bit characters */
}
escape = 0; /* current ch is not an escape character */
}
}
}
return status;
}
/* set_seq */
U4
xfer_hex
#ifdef STDC
(int n, FILE * dtl, FILE * dvi)
#else
(n, dtl, dvi)
int n;
FILE * dtl;
FILE * dvi;
#endif
/* translate unsigned n-byte hexadecimal number from dtl to dvi file. */
/* return value of hexadecimal number */
{
U4 unum = 0; /* at most this space needed */
COUNT nread = 0; /* number of DTL bytes read by read_token */
int nconv = 0; /* number of arguments converted by sscanf */
static Token token = ""; /* DTL token */
if (n < 1 || n > 4)
{
PRINT_PROGNAME;
fprintf (stderr,
"(xfer_hex) : INTERNAL ERROR : asked for %d bytes. Must be 1 to 4.\n",
n);
dexit (1);
}
nread = read_token (dtl, token);
nconv = sscanf (token, XF4, &unum);
if (nconv < 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_hex) : DTL FILE ERROR (%s) : %s \"%s\".\n",
dtl_filename, "hexadecimal number expected, not", token);
dexit (1);
}
put_unsigned (n, unum, dvi);
return unum;
}
/* xfer_hex */
U4
xfer_oct
#ifdef STDC
(int n, FILE * dtl, FILE * dvi)
#else
(n, dtl, dvi)
int n;
FILE * dtl;
FILE * dvi;
#endif
/* translate unsigned n-byte octal number from dtl to dvi file. */
/* return value of octal number */
{
U4 unum = 0; /* at most this space needed */
COUNT nread = 0; /* number of DTL bytes read by read_token */
int nconv = 0; /* number of arguments converted by sscanf */
static Token token = ""; /* DTL token */
if (n < 1 || n > 4)
{
PRINT_PROGNAME;
fprintf (stderr,
"(xfer_oct) : INTERNAL ERROR : asked for %d bytes. Must be 1 to 4.\n",
n);
dexit (1);
}
nread = read_token (dtl, token);
nconv = sscanf (token, OF4, &unum);
if (nconv < 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_oct) : DTL FILE ERROR (%s) : %s \"%s\".\n",
dtl_filename, "octal number expected, not", token);
dexit (1);
}
put_unsigned (n, unum, dvi);
return unum;
}
/* xfer_oct */
U4
xfer_unsigned
#ifdef STDC
(int n, FILE * dtl, FILE * dvi)
#else
(n, dtl, dvi)
int n;
FILE * dtl;
FILE * dvi;
#endif
/* translate unsigned n-byte number from dtl to dvi file. */
/* return value of unsigned number */
{
U4 unum = 0; /* at most this space needed */
unum = get_unsigned (dtl);
put_unsigned (n, unum, dvi);
return unum;
}
/* xfer_unsigned */
S4
xfer_signed
#ifdef STDC
(int n, FILE * dtl, FILE * dvi)
#else
(n, dtl, dvi)
int n;
FILE * dtl;
FILE * dvi;
#endif
/* translate signed n-byte number from dtl to dvi file. */
/* return value of signed number */
{
S4 snum = 0;
snum = get_signed (dtl);
put_signed (n, snum, dvi);
return snum;
}
/* xfer_signed */
U4
get_unsigned
#ifdef STDC
(FILE * dtl)
#else
(dtl)
FILE * dtl;
#endif
/* read unsigned number from dtl file. */
/* return value of unsigned number */
{
U4 unum = 0; /* at most this space needed */
COUNT nread = 0; /* number of DTL bytes read by read_token */
int nconv = 0; /* number of arguments converted by sscanf */
static Token token = ""; /* DTL token */
nread = read_token (dtl, token);
nconv = sscanf (token, UF4, &unum);
if (nconv < 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(get_unsigned) : DTL FILE ERROR (%s) : %s \"%s\".\n",
dtl_filename, "unsigned number expected, not", token);
dexit (1);
}
return unum;
}
/* get_unsigned */
S4
get_signed
#ifdef STDC
(FILE * dtl)
#else
(dtl)
FILE * dtl;
#endif
/* read signed number from dtl file. */
/* return value of signed number */
{
S4 snum = 0;
COUNT nread = 0; /* number of DTL bytes read by read_token */
int nconv = 0; /* number of sscanf arguments converted and assigned */
static Token token = "";
nread = read_token (dtl, token);
nconv = sscanf (token, SF4, &snum);
if (nconv < 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(get_signed) : DTL FILE ERROR (%s) : %s \"%s\".\n",
dtl_filename, "signed number expected, not", token);
dexit (1);
}
return snum;
}
/* get_signed */
int
put_unsigned
#ifdef STDC
(int n, U4 unum, FILE * dvi)
#else
(n, unum, dvi)
int n;
U4 unum;
FILE * dvi;
#endif
/* put unsigned in-byte integer to dvi file */
/* DVI format uses Big-endian storage of numbers: */
/* most significant byte is first. */
/* return number of bytes written. */
{
Byte ubyte[4]; /* at most 4 bytes needed in DVI format */
int i;
if (n < 1 || n > 4)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_unsigned) : INTERNAL ERROR : asked for %d bytes. Must be 1 to 4.\n",
n);
dexit (1);
}
/* Big-endian storage. */
for (i = 0; i < n; i++)
{
ubyte[i] = (Byte) (unum % 256);
unum /= 256;
}
/* Reverse order for big-endian representation. */
for (i = n-1; i >= 0; i--)
{
put_byte ((int) ubyte[i], dvi);
}
return n;
}
/* put_unsigned */
int
put_signed
#ifdef STDC
(int n, S4 snum, FILE * dvi)
#else
(n, snum, dvi)
int n;
S4 snum;
FILE * dvi;
#endif
/* put signed in-byte integer to dvi file */
/* DVI format uses 2's complement Big-endian storage of signed numbers: */
/* most significant byte is first. */
/* return number of bytes written. */
{
/* Will this deal properly with the sign? */
if (n < 1 || n > 4)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_signed) : INTERNAL ERROR : asked for %d bytes. Must be 1 to 4.\n",
n);
dexit (1);
}
/* How do we ensure 2's complement representation? */
/* Here's a trick that I hope is portable, given ANSI C. */
/* See K&R (2nd edition), Appendix A6.2 "Integral Conversions". */
/* Convert snum to U4 data type */
put_unsigned (n, (U4) snum, dvi);
return n;
}
/* put_signed */
int
check_bmes
#ifdef STDC
(FILE * dtl)
#else
(dtl)
FILE * dtl;
#endif
/* check that a BMES_CHAR is the next non-whitespace character in dtl */
{
int ch; /* next non-whitespace character in dtl */
/* `(Void)' because we ignore the number of spaces skipped */
(Void) skip_space (dtl, &ch);
if (ch < 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(check_bmes) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "end of dtl file, or reading error\n");
dexit (1);
}
if (ch != BMES_CHAR)
{
PRINT_PROGNAME;
fprintf (stderr, "(check_bmes) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "BMES_CHAR (`%c') %s, not `%c' (char %d).\n",
BMES_CHAR, "expected before string", ch, ch);
dexit (1);
}
return 1; /* OK */
}
/* check_bmes */
int
check_emes
#ifdef STDC
(FILE * dtl)
#else
(dtl)
FILE * dtl;
#endif
/* check that an EMES_CHAR is the next character in dtl */
{
int ch; /* dtl character */
if (read_char (dtl, &ch) == 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(check_emes) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "end of dtl file, or reading error\n");
dexit (1);
}
if (ch != EMES_CHAR)
{
PRINT_PROGNAME;
fprintf (stderr, "(check_emes) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "EMES_CHAR (`%c') %s, not `%c' (char %d).\n",
EMES_CHAR, "expected to follow string", ch, ch);
dexit (1);
}
return 1; /* OK */
}
/* check_emes */
/* Size typically used in this program for Lstring variables */
#define LSIZE 1024
Void
init_Lstring
#ifdef STDC
(Lstring * lsp, long int n)
#else
(lsp, n)
Lstring * lsp;
long int n;
#endif
{
lsp->l = 0;
lsp->m = n;
lsp->s = (char *) gmalloc (n);
}
/* init_Lstring */
Void
de_init_Lstring
#ifdef STDC
(Lstring * lsp)
#else
(lsp)
Lstring * lsp;
#endif
{
lsp->l = 0;
lsp->m = 0;
free (lsp->s);
lsp->s = NULL; /* to be sure */
}
/* de_init_Lstring */
Lstring *
alloc_Lstring
#ifdef STDC
(long int n)
#else
(n)
long int n;
#endif
{
Lstring * lsp;
lsp = (Lstring *) gmalloc (sizeof (Lstring));
init_Lstring (lsp, n);
return (lsp);
}
/* alloc_Lstring */
Void
free_Lstring
#ifdef STDC
(Lstring * lstr)
#else
(lstr)
Lstring * lstr;
#endif
{
free (lstr->s);
free (lstr);
}
/* free_Lstring */
Void
ls_putb
#ifdef STDC
(int ch, Lstring * lstr)
#else
(ch, lstr)
int ch;
Lstring * lstr;
#endif
/* write byte ch into Lstring *lstr */
{
if (lstr->l >= lstr->m)
{
PRINT_PROGNAME;
fprintf (stderr, "(ls_putb) : ERROR : No more room in Lstring.\n");
dexit (1);
}
else
{
lstr->s [(lstr->l)++] = ch;
}
}
/* ls_putb */
long int
get_Lstring
#ifdef STDC
(FILE * dtl, Lstring * lstr)
#else
(dtl, lstr)
FILE * dtl;
Lstring * lstr;
#endif
/* get a string from dtl file, store as an Lstring in *lstr. */
/* lstr must already be allocated and initialised. */
/* return length of Lstring *lstr */
{
U4 nch;
int char_status = CHAR_OK; /* OK so far */
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(get_Lstring) : entering get_Lstring.\n");
}
check_bmes (dtl);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr,
"(get_Lstring) : string is: \"");
}
for (nch=0; ; nch++)
{
int ch;
char_status = read_string_char (dtl, &ch);
if (char_status == CHAR_FAIL)
{
/* end of dtl file, or reading error */
fprintf (stderr, "\n");
PRINT_PROGNAME;
fprintf (stderr, "(get_Lstring) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "cannot read string[");
fprintf (stderr, UF4, nch);
fprintf (stderr, "] from dtl file.\n");
dexit (1);
}
if (debug)
{
fprintf (stderr, "%c", ch);
}
if (char_status == CHAR_EOS)
{
if (ch != EMES_CHAR)
{
PRINT_PROGNAME;
fprintf (stderr, "(get_Lstring) : INTERNAL ERROR : ");
fprintf (stderr, "char_status = CHAR_FAIL,\n");
fprintf (stderr,
"but ch = %c (char %d) is not EMES_CHAR = %c (char %d)\n",
ch, ch, EMES_CHAR, EMES_CHAR);
dexit (1);
}
(Void) unread_char ();
break; /* end of string */
}
else if (char_status == CHAR_OK)
{
ls_putb (ch, lstr);
}
else
{
PRINT_PROGNAME;
fprintf (stderr, "(get_Lstring) : INTERNAL ERROR : ");
fprintf (stderr, "char_status = %d is unfamiliar!\n", char_status);
dexit (1);
}
}
/* end for */
if (debug)
{
fprintf (stderr, "\".\n");
}
check_emes (dtl);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(get_Lstring) : leaving get_Lstring.\n");
}
return (lstr->l);
}
/* get_Lstring */
Void
put_Lstring
#ifdef STDC
(const Lstring * lstr, FILE * dvi)
#else
(str, dvi)
Lstring lstr;
FILE * dvi;
#endif
{
size_t fwret;
fwret = fwrite ((lstr->s), sizeof (char), (size_t) (lstr->l), dvi);
dvi_written += fwret;
if (fwret < lstr->l)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_Lstring) : DVI File ERROR : not all bytes written ");
fprintf (stderr, "(%ld of %ld).\n",
(long int) fwret, (long int) (lstr->l));
dexit (1);
}
}
/* put_Lstring */
U4
xfer_len_string
#ifdef STDC
(int n, FILE * dtl, FILE * dvi)
#else
(n, dtl, dvi)
int n;
FILE * dtl;
FILE * dvi;
#endif
/* transfer (length and) quoted string from dtl to dvi file, */
/* return number of bytes written to dvi file. */
{
U4 k, k2, lstr_maxsize;
Lstring lstr;
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_len_string) : entering xfer_len_string.\n");
}
/* k[n] : length of special string */
k = get_unsigned (dtl);
lstr_maxsize = (k > LSIZE) ? k : LSIZE;
init_Lstring (&lstr, lstr_maxsize);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_len_string) : string's nominal length k = ");
fprintf (stderr, UF4, k);
fprintf (stderr, " characters.\n");
}
k2 = get_Lstring (dtl, &lstr);
if (k2 != k)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_len_string) : WARNING : string length (");
fprintf (stderr, UF4, k);
fprintf (stderr, ") in DTL file is wrong\n");
fprintf (stderr, "Writing correct value (");
fprintf (stderr, UF4, k2);
fprintf (stderr, ") to DVI file\n");
}
put_unsigned (n, k2, dvi);
put_Lstring (&lstr, dvi);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_len_string) : leaving xfer_len_string.\n");
}
de_init_Lstring (&lstr);
return (n + k2);
}
/* xfer_len_string */
S4
xfer_bop_address
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
/* translate signed 4-byte bop address from dtl to dvi file. */
/* return value of bop address written to DVI file */
{
S4 snum = 0; /* at most this space needed for byte address */
COUNT nread = 0; /* number of DTL bytes read by read_token */
int nconv = 0; /* number of arguments converted by sscanf */
static Token token = ""; /* DTL token */
nread += read_token (dtl, token);
nconv = sscanf (token, SF4, &snum);
if (nconv != 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_bop_address) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "signed number expected, not \"%s\".\n", token);
dexit (1);
}
if (snum != last_bop_address)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_bop_address) : WARNING : byte address (");
fprintf (stderr, WF, snum);
fprintf (stderr, ")\n");
fprintf (stderr, "for previous bop in DTL file is wrong\n");
fprintf (stderr, "Writing correct value (");
fprintf (stderr, WF, last_bop_address);
fprintf (stderr, ") to DVI file\n");
}
put_signed (4, last_bop_address, dvi);
return last_bop_address;
}
/* xfer_bop_address */
S4
xfer_postamble_address
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
/* translate signed 4-byte postamble address from dtl to dvi file. */
/* return value of postamble address written to DVI file */
{
S4 snum = 0; /* at most this space needed for byte address */
COUNT nread = 0; /* number of DTL bytes read by read_token */
int nconv = 0; /* number of arguments converted by sscanf */
static Token token = ""; /* DTL token */
nread += read_token (dtl, token);
nconv = sscanf (token, SF4, &snum);
if (nconv != 1)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_postamble_address) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "signed number expected, not \"%s\".\n", token);
dexit (1);
}
if (snum != postamble_address)
{
PRINT_PROGNAME;
fprintf (stderr, "(xfer_postamble_address) : WARNING : byte address (");
fprintf (stderr, WF, snum);
fprintf (stderr, ")\n");
fprintf (stderr, "for postamble in DTL file is wrong\n");
fprintf (stderr, "Writing correct value (");
fprintf (stderr, WF, postamble_address);
fprintf (stderr, ") to DVI file\n");
}
put_signed (4, postamble_address, dvi);
return postamble_address;
}
/* xfer_postamble_address */
int
put_table
#ifdef STDC
(op_table table, int opcode, FILE * dtl, FILE * dvi)
#else
(table, opcode, dtl, dvi)
op_table table;
int opcode;
FILE * dtl;
FILE * dvi;
#endif
{
/* table: {char * name; int first, last; op_info * list; }; */
/* op_info: {int code; char * name; int nargs; char * args; }; */
op_info op; /* entry in table */
int i;
int pos; /* current position in string being scanned */
static String args = "";
/* Defensive programming. */
if (opcode < table.first || opcode > table.last)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_table) : DTL FILE (OR INTERNAL) ERROR : opcode %d ", opcode);
fprintf (stderr, "is outside table %s [ %d to %d ] !\n",
table.name, table.first, table.last);
dexit (1);
}
op = table.list [ opcode - table.first ];
/* More defensive programming. */
if (opcode != op.code)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_table) : INTERNAL ERROR : opcode %d for command \"%s\"",
opcode, op.name);
fprintf (stderr, " faulty in table \"%s\".\n", table.name);
dexit (1);
}
/* process all the arguments, according to size and sign */
strncpy (args, op.args, MAXSTRLEN);
pos = 0;
for (i=0; i < op.nargs; i++)
{
int argtype = 0;
int nscan = 0; /* number of bytes read by sscanf */
int nconv = 0; /* number of sscanf arguments converted & assigned */
/* sscanf() does NOT advance over its input: */
/* C strings lack internal state information, which C files have. */
/* On Sun/OS, sscanf calls ungetc on the string it reads, */
/* which therefore has to be writable. */
nconv = sscanf (args + pos, "%d%n", &argtype, &nscan);
if (nconv < 1 || nscan < 1)
{
PRINT_PROGNAME;
fprintf (stderr,
"(put_table) : INTERNAL ERROR : internal read of table %s failed!\n",
table.name);
dexit (1);
}
pos += nscan;
if (argtype < 0)
xfer_signed (-argtype, dtl, dvi);
else
xfer_unsigned (argtype, dtl, dvi);
}
/* end for */
return 1; /* OK */
}
/* put_table */
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
U4
special
#ifdef STDC
(FILE * dtl, FILE * dvi, int n)
#else
(dtl, dvi, n)
FILE * dtl;
FILE * dvi;
int n;
#endif
/* read special (1 <= n <= 4 byte) data from dtl, and write in dvi */
/* return number of bytes written */
{
U4 nk;
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(special) : entering special.\n");
}
if (n < 1 || n > 4)
{
PRINT_PROGNAME;
fprintf (stderr, "(special) : DTL FILE ERROR (%s) : special %d, ",
dtl_filename, n);
fprintf (stderr, "range is 1 to 4.\n");
dexit (1);
}
/* k[n] : length of special string */
/* x[k] : special string */
/* nk = n + k */
nk = xfer_len_string (n, dtl, dvi);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(special) : leaving special.\n");
}
return (nk);
}
/* special */
int
fontdef
#ifdef STDC
(FILE * dtl, FILE * dvi, int suffix)
#else
(dtl, dvi, suffix)
FILE * dtl;
FILE * dvi;
int suffix;
#endif
/* read fontdef fnt_def1 .. fnt_def4 from dtl, and write in dvi */
/* suffix is the fontdef suffix : 1 to 4 */
/* return number of bytes written */
{
U4 a, l, a2, l2;
U4 k;
Lstring lstr1, lstr2;
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : entering fontdef.\n");
}
if (suffix < 1 || suffix > 4)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "font def %d, but range is 1 to 4.\n", suffix);
dexit (1);
}
init_Lstring (&lstr1, LSIZE);
init_Lstring (&lstr2, LSIZE);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : about to read font number.\n");
}
/* k[suffix] : font number */
if (suffix == 4)
k = xfer_signed (suffix, dtl, dvi);
else
k = xfer_unsigned (suffix, dtl, dvi);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : font ");
fprintf (stderr, UF4, k);
fprintf (stderr, ".\n");
}
#ifdef HEX_CHECKSUM
/* c[4] : (hexadecimal) checksum : I (gt) would prefer this */
xfer_hex (4, dtl, dvi);
#else /*NOT HEX_CHECKSUM */
/* c[4] : checksum (octal, for comparison with tftopl's .pl file) */
xfer_oct (4, dtl, dvi);
#endif
/* s[4] */
xfer_unsigned (4, dtl, dvi);
/* d[4] */
xfer_unsigned (4, dtl, dvi);
/* If DTL file's edited, a and l may be wrong. */
/* a[1] : length of font `area' (directory) portion of pathname string */
a = get_unsigned (dtl);
/* l[1] : length of font portion of pathname string */
l = get_unsigned (dtl);
/* n[a+l] : font pathname string <= area + font */
a2 = get_Lstring (dtl, &lstr1);
if (a2 != a)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : WARNING : font area string's length (");
fprintf (stderr, UF4, a);
fprintf (stderr, ") in DTL file is wrong\n");
fprintf (stderr, "Writing correct value (");
fprintf (stderr, UF4, a2);
fprintf (stderr, ") to DVI file\n");
}
put_unsigned (1, a2, dvi);
l2 = get_Lstring (dtl, &lstr2);
if (l2 != l)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : WARNING : font string's length (");
fprintf (stderr, UF4, l);
fprintf (stderr, ") in DTL file is wrong\n");
fprintf (stderr, "Writing correct value (");
fprintf (stderr, UF4, l2);
fprintf (stderr, ") to DVI file\n");
}
put_unsigned (1, l2, dvi);
put_Lstring (&lstr1, dvi);
put_Lstring (&lstr2, dvi);
de_init_Lstring (&lstr2);
de_init_Lstring (&lstr1);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(fontdef) : leaving fontdef.\n");
}
return (suffix + 4*4 + 2*1 + a2 + l2);
}
/* fontdef */
U4
preamble
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
/* read preamble from dtl, and write in dvi */
/* return number of bytes written */
{
U4 k1;
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(preamble) : entering preamble.\n");
}
/* i[1] */
xfer_unsigned (1, dtl, dvi);
/* num[4] */
xfer_unsigned (4, dtl, dvi);
/* den[4] */
xfer_unsigned (4, dtl, dvi);
/* mag[4] */
xfer_unsigned (4, dtl, dvi);
/* k[1] : length of comment */
/* x[k] : comment string */
/* k1 = 1 + k */
k1 = xfer_len_string (1, dtl, dvi);
if (debug)
{
PRINT_PROGNAME;
fprintf (stderr, "(preamble) : leaving preamble.\n");
}
return (1 + 3*4 + k1);
}
/* preamble */
int
postamble
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
/* read postamble from dtl, and write in dvi */
/* return number of bytes written */
{
postamble_address = dvi_written - 1;
/* p[4] : DVI address of previous bop command */
/* --- unsigned? --- or signed, as I assume? */
/* For, surely p should be -1 if the DVI file has NO bop? */
xfer_bop_address (dtl, dvi);
/* num[4] */
xfer_unsigned (4, dtl, dvi);
/* den[4] */
xfer_unsigned (4, dtl, dvi);
/* mag[4] */
xfer_unsigned (4, dtl, dvi);
/* l[4] */
xfer_unsigned (4, dtl, dvi);
/* u[4] */
xfer_unsigned (4, dtl, dvi);
/* s[2] */
xfer_unsigned (2, dtl, dvi);
/* t[2] */
xfer_unsigned (2, dtl, dvi);
return (6*4 + 2*2);
}
/* postamble */
int
post_post
#ifdef STDC
(FILE * dtl, FILE * dvi)
#else
(dtl, dvi)
FILE * dtl;
FILE * dvi;
#endif
/* read post_post from dtl, and write in dvi */
/* return number of bytes written */
{
/* hope I'm writing the "223" bytes in an 8-bit clean way */
int n223 = 0; /* number of "223" bytes in final padding */
/* q[4] : DVI address of post command */
/* --- unsigned? --- or signed, as I assume? */
/* what happens if there is NO postamble command? */
/* shouldn't q be -1 then? */
xfer_postamble_address (dtl, dvi);
/* i[1] : DVI identification byte = 2 */
xfer_unsigned (1, dtl, dvi);
for (n223 = 0; true; n223++)
{
COUNT nread = 0; /* number of DTL bytes read by read_token */
static Token token;
strcpy (token, "");
nread = read_token (dtl, token);
/* check whether end of dtl file */
if (nread == 0)
{
if (group)
{
/* dtl file shouldn't end before an ECOM */
PRINT_PROGNAME;
fprintf (stderr, "(post_post) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "premature end of DTL file!\n");
fprintf (stderr,
"%d complete iterations of \"padding byte\" loop;\n", n223);
fprintf (stderr, "troublesome token = \"%s\"\n", token);
dexit (1);
}
/* leave the "223" loop */
break;
}
else if (strcmp (token, "223") == 0)
{
/* token is a "223" padding byte */
/* loop again */
}
else
{
/* read a non-empty token that wasn't "223" */
(Void) unread_char ();
if (group)
{
if (strcmp (token, ECOM) == 0)
{
/* end of DTL's post_post command */
}
else
{
/* error : expected end of post_post */
PRINT_PROGNAME;
fprintf (stderr, "(post_post) : DTL FILE ERROR (%s) : ",
dtl_filename);
fprintf (stderr, "token \"%s\" should be ECOM (\"%s\")\n",
token, ECOM);
dexit (1);
}
}
/* leave the "223" loop */
break;
}
}
/* end for */
if (n223 < 4)
{
PRINT_PROGNAME;
fprintf (stderr, "(post_post) : DTL FILE ERROR (%s) : \n",
dtl_filename);
fprintf (stderr, "fewer than four `223' padding bytes.\n");
fprintf (stderr, "Will write at least four `223' padding bytes.\n");
}
/* check whether the DVI file size is a multiple of 4 bytes */
if ((dvi_written + n223) % 4 != 0)
{
PRINT_PROGNAME;
fprintf (stderr, "(post_post) : WARNING : \n");
fprintf (stderr, "DVI size ");
fprintf (stderr, WF, dvi_written);
fprintf (stderr, " (bytes) wouldn't be a multiple of 4 !\n");
fprintf (stderr,
"Will write (at least four) `223' padding bytes until it is.\n");
}
/* final padding of DVI file by "223" bytes to a multiple of 4 bytes, */
/* with at least 4 bytes */
for (n223 = 0; (n223 < 4) || (dvi_written % 4 != 0); n223++)
{
/* add a "223" padding byte */
put_byte (223, dvi);
}
return (4 + 1 + n223);
}
/* post_post */
/* end of dt2dv.c */
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