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readpep.c
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readpep.c
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/*****************************************************************************/
/* readPEP.c */
/*****************************************************************************/
/* Stefan Roemer, 06.02.1995 - 06.02.1995 */
/* Stefan Schwoon, April 1997 */
/*****************************************************************************/
/* The function read_pep_net at the end reads a PEP LL net into memory. */
/*****************************************************************************/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "readlib.h"
#include "netconv.h"
#include "common.h"
/*****************************************************************************/
enum { FT_STRING = 1, FT_COORDS = 2, FT_NUMBER = 3, FT_FLAG = 4 };
enum { TB_MANDATORY = 0, TB_OPTIONAL = 1 };
enum { TB_BLOCK = 0, TB_LINE = 1 };
#define MAX_LINE_SIZE 500
#define MAX_READ_PLACES 50
/* used for specifying where data fields of interest should be stored. */
typedef struct
{
char c; /* Identifying character. */
void *ptr; /* Memory location. */
} t_dest;
/* what to do with the data found in a block with matching name */
typedef struct
{
char *name; /* Name of the block. */
int (*hookfunc)(); /* called any time an entity has been read */
char **restptr; /* Where to store additional data fields. */
t_dest *destarray; /* Where to store which data field. */
} t_blockdest;
typedef struct { int x,y; } t_coords; /* Simple struct for coordinates. */
/* File and block identifier. */
char *filetype;
char *blocktype;
typedef struct
{
char c;
int type;
} t_fieldinfo;
typedef struct
{
char *name;
int optional;
int line;
t_fieldinfo *field;
} t_blockinfo;
typedef struct
{
int type;
void *ptr;
} t_lookup;
/*****************************************************************************/
/* read_PEP_file */
/* This is a function for reading a file in PEP's general layout, i.e. it's */
/* not restricted to nets (though in practice that's the only thing we'll */
/* use it for). blocks is a data structure telling us how the layout of a */
/* file should look like, and dest tells us what we should do with the data */
/* we find (what and where to store it). */
void read_PEP_file(char *filename, char **types,
t_blockinfo *blocks, t_blockdest *dest)
{
FILE *infile;
t_lookup *tbl;
t_fieldinfo *fld;
t_dest *dst;
t_blockdest *sdest = dest;
int i, len = 0, ch, num, num2, ralloc;
char *restptr, *rtmp;
HLinput_file = filename;
HLinput_line = 1;
/* Open the file, read the header. */
if (!(infile = fopen(filename, "r")))
nc_error("could not open file for reading");
ReadCmdToken(infile);
if (strcmp(sbuf, "PEP")) nc_error("keyword `PEP' expected");
/* Check if the file's type (second line of file) is one of those
that are allowed. */
ReadNewline(infile);
ReadCmdToken(infile);
for (; *types && strcmp(sbuf,*types); types++);
if (!*types) nc_error("unexpected format identifier '%s'",sbuf);
filetype = MYstrdup(sbuf);
ReadNewline(infile);
ReadCmdToken(infile);
if (strncmp(sbuf, "FORMAT_N", 8))
nc_error("keyword 'FORMAT_N' or 'FORMAT_N2' expected");
tbl = (t_lookup*) MYmalloc(sizeof(t_lookup)*(128-' ')) - ' ';
ReadNewline(infile);
while (!feof(infile))
{
/* Read next block id. */
ReadCmdToken(infile);
blocktype = MYstrdup(sbuf);
/* Identify block. */
for (; blocks->name && strcmp(blocks->name,sbuf); blocks++)
if (!blocks->optional)
nc_error("keyword '%s' expected",blocks->name);
if (!blocks->name) nc_error("unknown keyword '%s'",sbuf);
for (dest = sdest; dest->name; dest++)
if (!strcmp(blocks->name,dest->name)) break;
/* Set up tbl. */
for (i=' '; i<128; tbl[i++].type = 0);
for (i=' '; i<128; tbl[i++].ptr = NULL);
for (fld = blocks->field; fld->c; fld++)
tbl[(int)fld->c].type = fld->type;
if (!blocks->line) ReadNewline(infile);
/* Read lines until next block begins. Every line yields one
new entity of the type determined by the current block. */
for(;;)
{
if (isupper(ch = ReadCharComment(infile)))
{
char ch2 = getc(infile);
ungetc(ch2,infile);
/* We assume that uppercase letters at the start of
a line always indicates a new block. */
if (isupper((int)ch2)) break;
}
if (feof(infile)) break;
if (ch == '\n') continue;
*(rtmp = restptr = MYmalloc(ralloc = 64)) = '\0';
/* If information about this block is wanted, take
the information where to store data from dest. */
if (dest->name)
for (dst = dest->destarray; dst->c; dst++)
{
t_lookup *l = tbl + dst->c;
l->ptr = dst->ptr;
switch(l->type)
{
case FT_STRING:
case FT_COORDS:
*(char**)(l->ptr) = NULL;
break;
case FT_NUMBER:
case FT_FLAG:
*(int*)(l->ptr) = 0;
break;
default:
nc_error("internal error: don't "
"know the type of field '%c'",dst->c);
break;
}
}
/* Parse until end of line. We assume that all information
about an entity (place, transition etc.) is stored in
one single line. */
while (ch != '\n')
{
if (isdigit(ch) || ch == '-')
{
/* Numbers are treated specially.
x@y gets stored in the '@' field, and
plain numbers are stored in the '0' field. */
ungetc(ch,infile);
ReadNumber(infile,&num);
if ((ch=ReadWhiteSpace(infile)) == '@'
|| ch == '<' || ch == '>')
{
ch = '@';
ReadNumber(infile,&num2);
len = 24;
}
else
{
ungetc(ch,infile);
ch = '0';
len = 12;
}
}
else
{
if (ch == '\'' || ch == '"') ungetc(ch,infile);
switch(tbl[ch].type)
{
case FT_STRING:
ReadEnclString(infile);
len = 3+strlen(sbuf);
break;
case FT_NUMBER:
ReadNumber(infile,&num);
len = 12;
break;
case FT_COORDS:
ReadCoordinates(infile, &num, &num2);
len = 24;
break;
case FT_FLAG:
len = 1;
break;
default:
nc_error("unknown token '%c'",ch);
break;
}
}
/* Store data in the memory locations specified by
the dest array. If no location is given for a
particular field, its contents are written to
a 'rest' string. */
while (!tbl[ch].ptr && rtmp-restptr+len >= ralloc)
{
restptr = MYrealloc(restptr, ralloc += 64);
rtmp = restptr + strlen(restptr);
}
switch(tbl[ch].type)
{
case FT_STRING:
if (tbl[ch].ptr)
*(char**)(tbl[ch].ptr) = MYstrdup(sbuf);
else if (strchr("'\"",ch))
sprintf(rtmp,"\"%s\"",sbuf);
else
sprintf(rtmp,"%c\"%s\"",ch,sbuf);
break;
case FT_NUMBER:
if (tbl[ch].ptr)
*(int*)(tbl[ch].ptr) = num;
else if (ch == '0')
sprintf(rtmp,"%d ",num);
else
sprintf(rtmp,"%c%d",ch,num);
break;
case FT_COORDS:
if (tbl[ch].ptr)
{
*((t_coords**)(tbl[ch].ptr)) =
MYmalloc(sizeof(t_coords));
(*(t_coords**)(tbl[ch].ptr))->x = num;
(*(t_coords**)(tbl[ch].ptr))->y = num2;
}
else if (ch == '@')
sprintf(rtmp,"%d@%d ",num,num2);
else
sprintf(rtmp,"%c%d@%d",ch,num,num2);
break;
case FT_FLAG:
if (tbl[ch].ptr)
(*(int*)(tbl[ch].ptr))++;
else
sprintf(rtmp,"%c",ch);
break;
}
if (!tbl[ch].ptr) rtmp += strlen(rtmp);
ch = ReadCharComment(infile);
} /* end of while */
/* When the whole line has been read, see if information
about the current block is wanted - if so, call the
corresponding hook function. */
if (dest->name)
{
if (dest->restptr) *(dest->restptr) = restptr;
if (dest->hookfunc()) nc_error("read aborted");
}
else
free(restptr);
HLinput_line++;
}
free(blocktype);
if (!feof(infile)) ungetc(ch,infile);
blocks++;
}
/* Check for mandatory blocks that didn't occur in the file. */
for (; blocks->name; blocks++)
if (!blocks->optional)
nc_error("section '%s' not found",blocks->name);
free(tbl+' ');
fclose(infile);
}
/*****************************************************************************/
/* Define the layout of a PEP net file. */
/* Allowable types of nets. */
char *type_llnet[] = { "PetriBox", "PTNet", NULL };
/* Defaults for blocks/places/transitions. */
t_fieldinfo nodedefs[] =
{ { 'n', FT_COORDS }, /* rel pos of name */
{ 'a', FT_COORDS }, /* rel pos of meaning */
{ 's', FT_NUMBER }, /* object size */
{ 't', FT_NUMBER }, /* line weight */
{ 0 , 0 } };
/* Defaults for arcs. */
t_fieldinfo arcdefs[] =
{ { 'n', FT_COORDS }, /* rel pos of name */
{ 't', FT_NUMBER }, /* line weight */
{ 'w', FT_NUMBER }, /* default weight */
{ 0 , 0 } };
/* Data fields for blocks. */
t_fieldinfo blockfields[] =
{ { '\'',FT_STRING }, /* identifier */
{ '"', FT_STRING }, /* " */
{ '@', FT_COORDS }, /* coordinates */
{ '0', FT_NUMBER }, /* numeric identifier */
{ 'n', FT_COORDS }, /* rel pos of name */
{ 'N', FT_COORDS }, /* abs. Pos of name */
{ 'b', FT_STRING }, /* Bedeutung */
{ 'a', FT_COORDS }, /* rel pos of meaning */
{ 'A', FT_COORDS }, /* abs pos of meaning */
{ 'R', FT_STRING }, /* reference */
{ 'T', FT_STRING }, /* BPN->HL ref (obsolete) */
{ 'u', FT_STRING }, /* block list */
{ 0 , 0 } };
/* Data fields for places. */
t_fieldinfo placefields[] =
{ { '\'',FT_STRING }, /* identifier */
{ '"', FT_STRING }, /* " */
{ '@', FT_COORDS }, /* coordinates */
{ '0', FT_NUMBER }, /* numeric identifier */
{ 'n', FT_COORDS }, /* rel pos of name */
{ 'N', FT_COORDS }, /* abs pos of name */
{ 'b', FT_STRING }, /* meaning */
{ 'a', FT_COORDS }, /* rel pos of meaning */
{ 'A', FT_COORDS }, /* abs pos of meaning */
{ 'M', FT_NUMBER }, /* initial marking (int) */
{ 'q', FT_NUMBER }, /* marking query (int) */
{ 'm', FT_NUMBER }, /* current marking (int) */
{ 'u', FT_STRING }, /* block list */
{ 'Z', FT_STRING }, /* type */
{ 'B', FT_COORDS }, /* rel pos of type */
{ 'z', FT_STRING }, /* initial marking (str) */
{ 'y', FT_STRING }, /* current marking (str) */
{ 'R', FT_STRING }, /* reference */
{ 'k', FT_NUMBER }, /* capacity */
{ 'e', FT_FLAG }, /* entry place */
{ 'x', FT_FLAG }, /* exit place */
{ 'v', FT_NUMBER }, /* flags */
{ 's', FT_NUMBER }, /* object size */
{ 't', FT_NUMBER }, /* line weight */
{ 'c', FT_NUMBER }, /* colour */
{ 'T', FT_STRING }, /* BPN->HL ref (obsolete) */
{ 'h', FT_NUMBER }, /* harmful or bad place */
{ 0 , 0 } };
/* Data fields for transitions. */
t_fieldinfo transfields[] =
{ { 'S', FT_FLAG }, /* synch transition */
{ '\'',FT_STRING }, /* identifier */
{ '"', FT_STRING }, /* " */
{ '@', FT_COORDS }, /* coordinates */
{ '0', FT_NUMBER }, /* numeric identifier */
{ 'n', FT_COORDS }, /* rel pos of name */
{ 'N', FT_COORDS }, /* abs pos of name */
{ 'b', FT_STRING }, /* meaning */
{ 'a', FT_COORDS }, /* rel pos of meaning */
{ 'A', FT_COORDS }, /* abs pos of meaning */
{ 'B', FT_NUMBER }, /* enable blocking (int) */
{ 'v', FT_NUMBER }, /* flags */
{ 'u', FT_STRING }, /* block list */
{ 'P', FT_STRING }, /* list of phantom trs */
{ 'g', FT_STRING }, /* value term */
{ 'h', FT_COORDS }, /* rel pos of value term */
{ 'H', FT_COORDS }, /* rel pos of value term */
{ 'R', FT_STRING }, /* reference */
{ 'i', FT_STRING }, /* action terms */
{ 'j', FT_COORDS }, /* rel pos action terms */
{ 's', FT_NUMBER }, /* object size */
{ 't', FT_NUMBER }, /* line weight */
{ 'c', FT_NUMBER }, /* colour */
{ 'T', FT_STRING }, /* BPN->HL ref (obsolete) */
{ 'r', FT_FLAG }, /* refined flag */
{ 0 , 0 } };
/* Data fields for arcs. */
t_fieldinfo arcfields[] =
{ { '@', FT_COORDS }, /* source/dest */
{ 'J', FT_COORDS }, /* coordinates */
{ ',', FT_COORDS }, /* more coordinates */
{ 'w', FT_NUMBER }, /* weight */
{ 'n', FT_COORDS }, /* rel pos of weight */
{ 'N', FT_COORDS }, /* abs pos of weight */
{ 'p', FT_STRING }, /* inscription */
{ 'q', FT_COORDS }, /* rel pos of inscription */
{ 'Q', FT_COORDS }, /* abs pos of inscription */
{ 'v', FT_NUMBER }, /* visibility */
{ 't', FT_NUMBER }, /* line weight */
{ 'c', FT_NUMBER }, /* colour */
{ 0 , 0 } };
/* Data fields for texts. */
t_fieldinfo textfields[] =
{ { '\'',FT_STRING }, /* text */
{ '"', FT_STRING }, /* " */
{ 'N', FT_COORDS }, /* absolute position */
{ 0 , 0 } };
/* All the data blocks that may occur in the file. */
t_blockinfo netblocks[] =
{ { "DBL", TB_OPTIONAL, TB_LINE, nodedefs },
{ "DPL", TB_OPTIONAL, TB_LINE, nodedefs },
{ "DTR", TB_OPTIONAL, TB_LINE, nodedefs },
{ "DPT", TB_OPTIONAL, TB_LINE, arcdefs },
{ "BL", TB_OPTIONAL, TB_BLOCK, blockfields },
{ "PL", TB_MANDATORY, TB_BLOCK, placefields },
{ "TR", TB_MANDATORY, TB_BLOCK, transfields },
{ "MQ", TB_OPTIONAL, TB_BLOCK, placefields },
{ "RT", TB_OPTIONAL, TB_BLOCK, placefields },
{ "PTR", TB_OPTIONAL, TB_BLOCK, transfields+1 },
{ "RD", TB_OPTIONAL, TB_BLOCK, arcfields },
{ "TP", TB_MANDATORY, TB_BLOCK, arcfields },
{ "PT", TB_MANDATORY, TB_BLOCK, arcfields },
{ "RS", TB_OPTIONAL, TB_BLOCK, arcfields },
{ "PTP", TB_OPTIONAL, TB_BLOCK, arcfields },
{ "PPT", TB_OPTIONAL, TB_BLOCK, arcfields },
{ "TX", TB_OPTIONAL, TB_BLOCK, textfields },
{ NULL, 0, 0, NULL } };
/*****************************************************************************/
#define MBSIZE 4096
#define NAMES_START 2000
#define NAMES_OFFSET 1000
net_t *rd_net;
t_coords *rd_co;
place_t **PlArray;
trans_t **TrArray;
int AnzPlNamen, MaxPlNamen, AnzTrNamen, MaxTrNamen;
int placecount, transcount, rd_ident, rd_marked,
rd_blocked, rd_queried, rd_harmful;
char autonumbering, *rd_name;
/*****************************************************************************/
/* insert_{place,trans,arc} */
/* These functions are called from read_PEP_net whenever a place, transition */
/* or an arc has been parsed in the net. The tables place_dest, trans_dest */
/* and arc_dest in read_HLnet determine where read_PEP_net should store */
/* contents of certain fields prior to calling these functions. */
int insert_place()
{
placecount++;
if (rd_ident && rd_ident != placecount) autonumbering = 0;
if (!rd_ident && autonumbering) rd_ident = placecount;
if (!rd_ident) nc_error("missing place identifier");
if (rd_ident > AnzPlNamen)
AnzPlNamen = rd_ident;
else if (PlArray[rd_ident])
nc_error("place identifier %d used twice", rd_ident);
while (AnzPlNamen >= MaxPlNamen)
{
int count;
PlArray = MYrealloc((char*) PlArray,
(MaxPlNamen += NAMES_OFFSET) * sizeof(place_t*));
for (count = MaxPlNamen - NAMES_OFFSET; count < MaxPlNamen;)
PlArray[count++] = NULL;
}
PlArray[rd_ident] = nc_create_place(rd_net);
PlArray[rd_ident]->name = rd_name? MYstrdup(rd_name) : NULL;
if (rd_marked > 1) nc_error("place %s has more than one token",rd_name);
PlArray[rd_ident]->marked = !!rd_marked;
PlArray[rd_ident]->queried = !!rd_queried;
PlArray[rd_ident]->harmful = !!rd_harmful;
return 0;
}
int insert_trans()
{
if (!transcount++) autonumbering = 1;
if (rd_ident && rd_ident != transcount) autonumbering = 0;
if (!rd_ident && autonumbering) rd_ident = transcount;
if (!rd_ident) nc_error("missing transition identifier");
if (rd_ident > AnzTrNamen)
AnzTrNamen = rd_ident;
else if (TrArray[rd_ident])
nc_error("transition identifier %d used twice",rd_ident);
while (AnzTrNamen >= MaxTrNamen)
{
int count;
TrArray = MYrealloc((char*) TrArray,
(MaxTrNamen += NAMES_OFFSET) * sizeof(trans_t*));
for (count = MaxTrNamen - NAMES_OFFSET; count < MaxTrNamen;)
TrArray[count++] = NULL;
}
TrArray[rd_ident] = nc_create_transition(rd_net);
TrArray[rd_ident]->name = rd_name? MYstrdup(rd_name) : NULL;
TrArray[rd_ident]->blocked = rd_blocked >= 1 ? !!rd_blocked : 0;
return 0;
}
int insert_restr(){
restr_t* rt = nc_create_restriction(rd_net);
rt->name = rd_name? MYstrdup(rd_name) : NULL;
return 0;
}
int insert_arc()
{
static int tp, rs = 0, rd = 0; /* tp = 1 means Place->Trans, 0 is Trans->Place;
rs = 1 means reset arc Place->Trans
rd = 1 means read arc Place->Trans */
int pl, tr;
if (*blocktype)
{
rs = strcmp(blocktype,"RS");
if (rs == 0)
tp = -1;
else{
rd = strcmp(blocktype, "RD");
tp = rd == 0 ? -2 : strcmp(blocktype,"PT");
}
*blocktype = '\0';
}
if (tp == -1)
tp = rs;
else if(tp == -2)
tp = rd;
pl = tp? rd_co->y : rd_co->x;
tr = tp? rd_co->x : rd_co->y;
if (!tr || (tr > AnzTrNamen) || !TrArray[tr])
nc_error("arc: incorrect transition identifier");
if (!pl || (pl > AnzPlNamen) || !PlArray[pl] )
nc_error("arc: incorrect place identifier");
if (rs == 0)
nc_create_arc(&(TrArray[tr]->reset),&(PlArray[pl]->reset),
TrArray[tr],PlArray[pl]);
else if (rd == 0){
nc_create_arc(&(TrArray[tr]->ctxset),&(PlArray[pl]->ctxset),
TrArray[tr],PlArray[pl]);
}
else if (tp != 0)
nc_create_arc(&(TrArray[tr]->postset),&(PlArray[pl]->preset),
TrArray[tr],PlArray[pl]);
else{
nc_create_arc(&(PlArray[pl]->postset),&(TrArray[tr]->preset),
PlArray[pl],TrArray[tr]);
}
return 0;
}
/*****************************************************************************/
/* The main function of this file: read a PEP file into a net_t structure. */
net_t* read_pep_net(char *PEPfilename)
{
/* These tables instruct read_PEP_net where contents
of certain fields should be stored. */
t_dest place_dest[] =
{ { '\'',&rd_name }, /* identifier */
{ '"', &rd_name }, /* " */
{ '0', &rd_ident }, /* numeric name */
{ 'M', &rd_marked }, /* initial marking */
{ 'q', &rd_queried }, /* queried marking */
{ 'h', &rd_harmful }, /* harmful place */
{ 0 , 0 } };
t_dest trans_dest[] =
{ { '\'',&rd_name }, /* identifier */
{ '"', &rd_name }, /* " */
{ '0', &rd_ident }, /* numeric name */
{ 'B', &rd_blocked }, /* enable blocking */
{ 0 , 0 } };
t_dest marking_restr[] =
{ { '\'',&rd_name }, /* identifier */
{ '"', &rd_name }, /* " */
{ 0 , 0 } };
t_dest arc_dest[] =
{ { '@', &rd_co }, /* source/destination */
{ 0 , 0 } };
/* This table is passed to read_PEP_net and instructs */
/* it which "hook" functions (see below) should be */
/* called whenever a place, transition etc. is found. */
t_blockdest netdest[] =
{ { "PL", insert_place, NULL, place_dest },
{ "TR", insert_trans, NULL, trans_dest },
{ "RT", insert_restr, NULL, marking_restr },
{ "RD", insert_arc, NULL, arc_dest},
{ "TP", insert_arc, NULL, arc_dest },
{ "PT", insert_arc, NULL, arc_dest },
{ "RS", insert_arc, NULL, arc_dest},
{ NULL, NULL, NULL, NULL } };
int count;
/* Set up tables. */
PlArray = MYmalloc((count = MaxPlNamen = MaxTrNamen = NAMES_START)
* sizeof(place_t*));
TrArray = MYmalloc(count * sizeof(trans_t*));
AnzPlNamen = AnzTrNamen = 0;
while (--count)
PlArray[count] = NULL, TrArray[count] = NULL;
/* Initialize net */
rd_net = nc_create_net();
placecount = transcount = 0;
autonumbering = 1;
/* Read the net */
read_PEP_file(PEPfilename, type_llnet, netblocks, netdest);
free(PlArray);
free(TrArray);
nc_compute_sizes(rd_net);
return rd_net;
}