| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rcalc.c,v 1.20 2006/12/23 17:27:45 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* rcalc.c - record calculator program. |
| 6 |
* |
| 7 |
* 9/11/87 |
| 8 |
*/ |
| 9 |
|
| 10 |
#include <stdlib.h> |
| 11 |
#include <fcntl.h> |
| 12 |
#include <stdio.h> |
| 13 |
#include <string.h> |
| 14 |
#include <math.h> |
| 15 |
#include <ctype.h> |
| 16 |
|
| 17 |
#include "platform.h" |
| 18 |
#include "rterror.h" |
| 19 |
#include "rtmisc.h" |
| 20 |
#include "rtio.h" |
| 21 |
#include "calcomp.h" |
| 22 |
|
| 23 |
#define isnum(c) (isdigit(c) || (c)=='-' || (c)=='.' \ |
| 24 |
|| (c)=='+' || (c)=='e' || (c)=='E') |
| 25 |
|
| 26 |
#define isblnk(c) (igneol ? isspace(c) : (c)==' '||(c)=='\t') |
| 27 |
|
| 28 |
#define INBSIZ 16384 /* longest record */ |
| 29 |
#define MAXCOL 32 /* number of columns recorded */ |
| 30 |
|
| 31 |
/* field type specifications */ |
| 32 |
#define F_NUL 0 /* empty */ |
| 33 |
#define F_TYP 0x7000 /* mask for type */ |
| 34 |
#define F_WID 0x0fff /* mask for width */ |
| 35 |
#define T_LIT 0x1000 /* string literal */ |
| 36 |
#define T_STR 0x2000 /* string variable */ |
| 37 |
#define T_NUM 0x3000 /* numeric value */ |
| 38 |
|
| 39 |
struct strvar { /* string variable */ |
| 40 |
char *name; |
| 41 |
char *val; |
| 42 |
char *preset; |
| 43 |
struct strvar *next; |
| 44 |
}; |
| 45 |
|
| 46 |
struct field { /* record format structure */ |
| 47 |
int type; /* type of field (& width) */ |
| 48 |
union { |
| 49 |
char *sl; /* string literal */ |
| 50 |
struct strvar *sv; /* string variable */ |
| 51 |
char *nv; /* numeric variable */ |
| 52 |
EPNODE *ne; /* numeric expression */ |
| 53 |
} f; /* field contents */ |
| 54 |
struct field *next; /* next field in record */ |
| 55 |
}; |
| 56 |
|
| 57 |
#define savqstr(s) strcpy(emalloc(strlen(s)+1),s) |
| 58 |
#define freqstr(s) efree(s) |
| 59 |
|
| 60 |
static int getinputrec(FILE *fp); |
| 61 |
static void scaninp(void), advinp(void), resetinp(void); |
| 62 |
static void putrec(void), putout(void), nbsynch(void); |
| 63 |
static int getrec(void); |
| 64 |
static void execute(char *file); |
| 65 |
static void initinp(FILE *fp); |
| 66 |
static void svpreset(char *eqn); |
| 67 |
static void readfmt(char *spec, int output); |
| 68 |
static int readfield(char **pp); |
| 69 |
static int getfield(struct field *f); |
| 70 |
static void chanset(int n, double v); |
| 71 |
static void bchanset(int n, double v); |
| 72 |
static struct strvar* getsvar(char *svname); |
| 73 |
static double l_in(char *); |
| 74 |
|
| 75 |
struct field *inpfmt = NULL; /* input record format */ |
| 76 |
struct field *outfmt = NULL; /* output record structure */ |
| 77 |
struct strvar *svhead = NULL; /* string variables */ |
| 78 |
|
| 79 |
int blnkeq = 1; /* blanks compare equal? */ |
| 80 |
int igneol = 0; /* ignore end of line? */ |
| 81 |
int passive = 0; /* passive mode (transmit unmatched input) */ |
| 82 |
char sepchar = '\t'; /* input/output separator */ |
| 83 |
int noinput = 0; /* no input records? */ |
| 84 |
int itype = 'a'; /* input type (a/f/F/d/D) */ |
| 85 |
int nbicols = 0; /* number of binary input columns */ |
| 86 |
int otype = 'a'; /* output format (a/f/F/d/D) */ |
| 87 |
char inpbuf[INBSIZ]; /* input buffer */ |
| 88 |
double colval[MAXCOL]; /* input column values */ |
| 89 |
unsigned long colflg = 0; /* column retrieved flags */ |
| 90 |
int colpos; /* output column position */ |
| 91 |
|
| 92 |
int nowarn = 0; /* non-fatal diagnostic output */ |
| 93 |
int unbuff = 0; /* unbuffered output (flush each record) */ |
| 94 |
|
| 95 |
struct { |
| 96 |
FILE *fin; /* input file */ |
| 97 |
int chr; /* next character */ |
| 98 |
char *beg; /* home position */ |
| 99 |
char *pos; /* scan position */ |
| 100 |
char *end; /* read position */ |
| 101 |
} ipb; /* circular lookahead buffer */ |
| 102 |
|
| 103 |
|
| 104 |
int |
| 105 |
main( |
| 106 |
int argc, |
| 107 |
char *argv[] |
| 108 |
) |
| 109 |
{ |
| 110 |
int i; |
| 111 |
|
| 112 |
esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_OUTCHAN|E_RCONST; |
| 113 |
esupport &= ~(E_REDEFW); |
| 114 |
|
| 115 |
#ifdef BIGGERLIB |
| 116 |
biggerlib(); |
| 117 |
#endif |
| 118 |
varset("PI", ':', 3.14159265358979323846); |
| 119 |
funset("in", 1, '=', &l_in); |
| 120 |
|
| 121 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 122 |
switch (argv[i][1]) { |
| 123 |
case 'b': |
| 124 |
blnkeq = !blnkeq; |
| 125 |
break; |
| 126 |
case 'l': |
| 127 |
igneol = !igneol; |
| 128 |
break; |
| 129 |
case 'p': |
| 130 |
passive = !passive; |
| 131 |
break; |
| 132 |
case 't': |
| 133 |
sepchar = argv[i][2]; |
| 134 |
break; |
| 135 |
case 's': |
| 136 |
svpreset(argv[++i]); |
| 137 |
break; |
| 138 |
case 'f': |
| 139 |
fcompile(argv[++i]); |
| 140 |
break; |
| 141 |
case 'e': |
| 142 |
scompile(argv[++i], NULL, 0); |
| 143 |
break; |
| 144 |
case 'n': |
| 145 |
noinput = 1; |
| 146 |
break; |
| 147 |
case 'i': |
| 148 |
switch (argv[i][2]) { |
| 149 |
case '\0': |
| 150 |
itype = 'a'; |
| 151 |
nbicols = 0; |
| 152 |
readfmt(argv[++i], 0); |
| 153 |
break; |
| 154 |
case 'a': |
| 155 |
itype = 'a'; |
| 156 |
nbicols = 0; |
| 157 |
break; |
| 158 |
case 'd': |
| 159 |
case 'D': |
| 160 |
itype = argv[i][2]; |
| 161 |
if (isdigit(argv[i][3])) |
| 162 |
nbicols = atoi(argv[i]+3); |
| 163 |
else |
| 164 |
nbicols = 1; |
| 165 |
if (nbicols*sizeof(double) > INBSIZ) { |
| 166 |
eputs(argv[0]); |
| 167 |
eputs(": too many input columns\n"); |
| 168 |
quit(1); |
| 169 |
} |
| 170 |
break; |
| 171 |
case 'f': |
| 172 |
case 'F': |
| 173 |
itype = argv[i][2]; |
| 174 |
if (isdigit(argv[i][3])) |
| 175 |
nbicols = atoi(argv[i]+3); |
| 176 |
else |
| 177 |
nbicols = 1; |
| 178 |
if (nbicols*sizeof(float) > INBSIZ) { |
| 179 |
eputs(argv[0]); |
| 180 |
eputs(": too many input columns\n"); |
| 181 |
quit(1); |
| 182 |
} |
| 183 |
break; |
| 184 |
default: |
| 185 |
goto userr; |
| 186 |
} |
| 187 |
break; |
| 188 |
case 'o': |
| 189 |
switch (argv[i][2]) { |
| 190 |
case '\0': |
| 191 |
otype = 'a'; |
| 192 |
readfmt(argv[++i], 1); |
| 193 |
break; |
| 194 |
case 'a': |
| 195 |
otype = 'a'; |
| 196 |
break; |
| 197 |
case 'd': |
| 198 |
case 'D': |
| 199 |
case 'f': |
| 200 |
case 'F': |
| 201 |
otype = argv[i][2]; |
| 202 |
break; |
| 203 |
default: |
| 204 |
goto userr; |
| 205 |
} |
| 206 |
break; |
| 207 |
case 'w': |
| 208 |
nowarn = !nowarn; |
| 209 |
break; |
| 210 |
case 'u': |
| 211 |
unbuff = !unbuff; |
| 212 |
break; |
| 213 |
default:; |
| 214 |
userr: |
| 215 |
eputs("Usage: "); |
| 216 |
eputs(argv[0]); |
| 217 |
eputs(" [-b][-l][-n][-p][-w][-u][-tS][-s svar=sval][-e expr][-f source][-i infmt][-o outfmt] [file]\n"); |
| 218 |
quit(1); |
| 219 |
} |
| 220 |
if (otype != 'a') |
| 221 |
SET_FILE_BINARY(stdout); |
| 222 |
if (noinput) { /* produce a single output record */ |
| 223 |
if (i < argc) { |
| 224 |
eputs(argv[0]); |
| 225 |
eputs(": file argument(s) incompatible with -n\n"); |
| 226 |
quit(1); |
| 227 |
} |
| 228 |
eclock++; |
| 229 |
putout(); |
| 230 |
quit(0); |
| 231 |
} |
| 232 |
if (itype != 'a') |
| 233 |
SET_FILE_BINARY(stdin); |
| 234 |
|
| 235 |
if (blnkeq) /* for efficiency */ |
| 236 |
nbsynch(); |
| 237 |
|
| 238 |
if (i == argc) /* from stdin */ |
| 239 |
execute(NULL); |
| 240 |
else /* from one or more files */ |
| 241 |
for ( ; i < argc; i++) |
| 242 |
execute(argv[i]); |
| 243 |
|
| 244 |
quit(0); |
| 245 |
return 0; /* pro forma return */ |
| 246 |
} |
| 247 |
|
| 248 |
|
| 249 |
static void |
| 250 |
nbsynch(void) /* non-blank starting synch character */ |
| 251 |
{ |
| 252 |
if (inpfmt == NULL || (inpfmt->type & F_TYP) != T_LIT) |
| 253 |
return; |
| 254 |
while (isblnk(*inpfmt->f.sl)) |
| 255 |
inpfmt->f.sl++; |
| 256 |
if (!*inpfmt->f.sl) |
| 257 |
inpfmt = inpfmt->next; |
| 258 |
} |
| 259 |
|
| 260 |
|
| 261 |
static int |
| 262 |
getinputrec( /* get next input record */ |
| 263 |
FILE *fp |
| 264 |
) |
| 265 |
{ |
| 266 |
if (inpfmt != NULL) |
| 267 |
return(getrec()); |
| 268 |
if (tolower(itype) == 'd') { |
| 269 |
if (fread(inpbuf, sizeof(double), nbicols, fp) != nbicols) |
| 270 |
return(0); |
| 271 |
if (itype == 'D') |
| 272 |
swap64(inpbuf, nbicols); |
| 273 |
return(1); |
| 274 |
} |
| 275 |
if (tolower(itype) == 'f') { |
| 276 |
if (fread(inpbuf, sizeof(float), nbicols, fp) != nbicols) |
| 277 |
return(0); |
| 278 |
if (itype == 'F') |
| 279 |
swap32(inpbuf, nbicols); |
| 280 |
return(1); |
| 281 |
} |
| 282 |
return(fgets(inpbuf, INBSIZ, fp) != NULL); |
| 283 |
} |
| 284 |
|
| 285 |
|
| 286 |
static void |
| 287 |
execute( /* process a file */ |
| 288 |
char *file |
| 289 |
) |
| 290 |
{ |
| 291 |
int conditional = vardefined("cond"); |
| 292 |
long nrecs = 0; |
| 293 |
long nout = 0; |
| 294 |
FILE *fp; |
| 295 |
|
| 296 |
if (file == NULL) |
| 297 |
fp = stdin; |
| 298 |
else if ((fp = fopen(file, "r")) == NULL) { |
| 299 |
eputs(file); |
| 300 |
eputs(": cannot open\n"); |
| 301 |
quit(1); |
| 302 |
} |
| 303 |
if (inpfmt != NULL) |
| 304 |
initinp(fp); |
| 305 |
|
| 306 |
while (getinputrec(fp)) { |
| 307 |
varset("recno", '=', (double)++nrecs); |
| 308 |
varset("outno", '=', (double)(nout+1)); |
| 309 |
colflg = 0; |
| 310 |
eclock++; |
| 311 |
if (!conditional || varvalue("cond") > 0.0) { |
| 312 |
putout(); |
| 313 |
++nout; |
| 314 |
} |
| 315 |
} |
| 316 |
fclose(fp); |
| 317 |
} |
| 318 |
|
| 319 |
|
| 320 |
static void |
| 321 |
putout(void) /* produce an output record */ |
| 322 |
{ |
| 323 |
|
| 324 |
colpos = 0; |
| 325 |
if (outfmt != NULL) |
| 326 |
putrec(); |
| 327 |
else if (otype == 'a') |
| 328 |
chanout(chanset); |
| 329 |
else |
| 330 |
chanout(bchanset); |
| 331 |
if (colpos && otype == 'a') |
| 332 |
putchar('\n'); |
| 333 |
if (unbuff) |
| 334 |
fflush(stdout); |
| 335 |
} |
| 336 |
|
| 337 |
|
| 338 |
static double |
| 339 |
l_in(char *funame) /* function call for $channel */ |
| 340 |
{ |
| 341 |
int n; |
| 342 |
register char *cp; |
| 343 |
/* get argument as integer */ |
| 344 |
n = (int)(argument(1) + .5); |
| 345 |
if (n != 0) /* return channel value */ |
| 346 |
return(chanvalue(n)); |
| 347 |
/* determine number of channels */ |
| 348 |
if (noinput || inpfmt != NULL) |
| 349 |
return(0); |
| 350 |
if (nbicols) |
| 351 |
return(nbicols); |
| 352 |
cp = inpbuf; /* need to count */ |
| 353 |
for (n = 0; *cp; ) |
| 354 |
if (blnkeq && isspace(sepchar)) { |
| 355 |
while (isspace(*cp)) |
| 356 |
cp++; |
| 357 |
n += *cp != '\0'; |
| 358 |
while (*cp && !isspace(*cp)) |
| 359 |
cp++; |
| 360 |
} else { |
| 361 |
n += *cp != '\n'; |
| 362 |
while (*cp && *cp++ != sepchar) |
| 363 |
; |
| 364 |
} |
| 365 |
return(n); |
| 366 |
} |
| 367 |
|
| 368 |
double |
| 369 |
chanvalue( /* return value for column n */ |
| 370 |
int n |
| 371 |
) |
| 372 |
{ |
| 373 |
int i; |
| 374 |
register char *cp; |
| 375 |
|
| 376 |
if (noinput || inpfmt != NULL) { |
| 377 |
eputs("no column input\n"); |
| 378 |
quit(1); |
| 379 |
} |
| 380 |
if (n < 1) { |
| 381 |
eputs("illegal channel number\n"); |
| 382 |
quit(1); |
| 383 |
} |
| 384 |
if (nbicols) { |
| 385 |
if (n > nbicols) |
| 386 |
return(0.0); |
| 387 |
if (tolower(itype) == 'd') { |
| 388 |
cp = inpbuf + (n-1)*sizeof(double); |
| 389 |
return(*(double *)cp); |
| 390 |
} |
| 391 |
cp = inpbuf + (n-1)*sizeof(float); |
| 392 |
return(*(float *)cp); |
| 393 |
} |
| 394 |
if (n <= MAXCOL && colflg & 1L<<(n-1)) |
| 395 |
return(colval[n-1]); |
| 396 |
|
| 397 |
cp = inpbuf; |
| 398 |
for (i = 1; i < n; i++) |
| 399 |
if (blnkeq && isspace(sepchar)) { |
| 400 |
while (isspace(*cp)) |
| 401 |
cp++; |
| 402 |
while (*cp && !isspace(*cp)) |
| 403 |
cp++; |
| 404 |
} else |
| 405 |
while (*cp && *cp++ != sepchar) |
| 406 |
; |
| 407 |
|
| 408 |
while (isspace(*cp)) /* some atof()'s don't like tabs */ |
| 409 |
cp++; |
| 410 |
|
| 411 |
if (n <= MAXCOL) { |
| 412 |
colflg |= 1L<<(n-1); |
| 413 |
return(colval[n-1] = atof(cp)); |
| 414 |
} else |
| 415 |
return(atof(cp)); |
| 416 |
} |
| 417 |
|
| 418 |
|
| 419 |
void |
| 420 |
chanset( /* output column n */ |
| 421 |
int n, |
| 422 |
double v |
| 423 |
) |
| 424 |
{ |
| 425 |
if (colpos == 0) /* no leading separator */ |
| 426 |
colpos = 1; |
| 427 |
while (colpos < n) { |
| 428 |
putchar(sepchar); |
| 429 |
colpos++; |
| 430 |
} |
| 431 |
printf("%.9g", v); |
| 432 |
} |
| 433 |
|
| 434 |
|
| 435 |
void |
| 436 |
bchanset( /* output binary channel n */ |
| 437 |
int n, |
| 438 |
double v |
| 439 |
) |
| 440 |
{ |
| 441 |
static char zerobuf[sizeof(double)]; |
| 442 |
float fval = v; |
| 443 |
|
| 444 |
while (++colpos < n) |
| 445 |
fwrite(zerobuf, |
| 446 |
tolower(otype)=='d' ? sizeof(double) : sizeof(float), |
| 447 |
1, stdout); |
| 448 |
switch (otype) { |
| 449 |
case 'D': |
| 450 |
swap64((char *)&v, 1); |
| 451 |
/* fall through */ |
| 452 |
case 'd': |
| 453 |
fwrite(&v, sizeof(double), 1, stdout); |
| 454 |
break; |
| 455 |
case 'F': |
| 456 |
swap32((char *)&fval, 1); |
| 457 |
/* fall through */ |
| 458 |
case 'f': |
| 459 |
fwrite(&fval, sizeof(float), 1, stdout); |
| 460 |
break; |
| 461 |
} |
| 462 |
} |
| 463 |
|
| 464 |
|
| 465 |
static void |
| 466 |
readfmt( /* read record format */ |
| 467 |
char *spec, |
| 468 |
int output |
| 469 |
) |
| 470 |
{ |
| 471 |
int fd; |
| 472 |
char *inptr; |
| 473 |
struct field fmt; |
| 474 |
int res; |
| 475 |
register struct field *f; |
| 476 |
/* check for inline format */ |
| 477 |
for (inptr = spec; *inptr; inptr++) |
| 478 |
if (*inptr == '$') |
| 479 |
break; |
| 480 |
if (*inptr) /* inline */ |
| 481 |
inptr = spec; |
| 482 |
else { /* from file */ |
| 483 |
if ((fd = open(spec, 0)) == -1) { |
| 484 |
eputs(spec); |
| 485 |
eputs(": cannot open\n"); |
| 486 |
quit(1); |
| 487 |
} |
| 488 |
res = read(fd, inpbuf+2, INBSIZ-2); |
| 489 |
if (res <= 0 || res >= INBSIZ-1) { |
| 490 |
eputs(spec); |
| 491 |
if (res < 0) |
| 492 |
eputs(": read error\n"); |
| 493 |
else if (res == 0) |
| 494 |
eputs(": empty file\n"); |
| 495 |
else if (res >= INBSIZ-1) |
| 496 |
eputs(": format too long\n"); |
| 497 |
quit(1); |
| 498 |
} |
| 499 |
close(fd); |
| 500 |
(inptr=inpbuf+2)[res] = '\0'; |
| 501 |
} |
| 502 |
f = &fmt; /* get fields */ |
| 503 |
while ((res = readfield(&inptr)) != F_NUL) { |
| 504 |
f->next = (struct field *)emalloc(sizeof(struct field)); |
| 505 |
f = f->next; |
| 506 |
f->type = res; |
| 507 |
switch (res & F_TYP) { |
| 508 |
case T_LIT: |
| 509 |
f->f.sl = savqstr(inpbuf); |
| 510 |
break; |
| 511 |
case T_STR: |
| 512 |
f->f.sv = getsvar(inpbuf); |
| 513 |
break; |
| 514 |
case T_NUM: |
| 515 |
if (output) |
| 516 |
f->f.ne = eparse(inpbuf); |
| 517 |
else |
| 518 |
f->f.nv = savestr(inpbuf); |
| 519 |
break; |
| 520 |
} |
| 521 |
/* add final newline if necessary */ |
| 522 |
if (!igneol && *inptr == '\0' && inptr[-1] != '\n') |
| 523 |
inptr = "\n"; |
| 524 |
} |
| 525 |
f->next = NULL; |
| 526 |
if (output) |
| 527 |
outfmt = fmt.next; |
| 528 |
else |
| 529 |
inpfmt = fmt.next; |
| 530 |
} |
| 531 |
|
| 532 |
|
| 533 |
static int |
| 534 |
readfield( /* get next field in format */ |
| 535 |
register char **pp |
| 536 |
) |
| 537 |
{ |
| 538 |
int type = F_NUL; |
| 539 |
int width = 0; |
| 540 |
register char *cp; |
| 541 |
|
| 542 |
cp = inpbuf; |
| 543 |
while (cp < &inpbuf[INBSIZ-1] && **pp != '\0') { |
| 544 |
width++; |
| 545 |
switch (type) { |
| 546 |
case F_NUL: |
| 547 |
if (**pp == '$') { |
| 548 |
(*pp)++; |
| 549 |
width++; |
| 550 |
if (**pp == '{') { |
| 551 |
type = T_NUM; |
| 552 |
(*pp)++; |
| 553 |
continue; |
| 554 |
} else if (**pp == '(') { |
| 555 |
type = T_STR; |
| 556 |
(*pp)++; |
| 557 |
continue; |
| 558 |
} else if (**pp != '$') { |
| 559 |
eputs("format error\n"); |
| 560 |
quit(1); |
| 561 |
} |
| 562 |
width--; |
| 563 |
} |
| 564 |
type = T_LIT; |
| 565 |
*cp++ = *(*pp)++; |
| 566 |
continue; |
| 567 |
case T_LIT: |
| 568 |
if (**pp == '$') { |
| 569 |
width--; |
| 570 |
break; |
| 571 |
} |
| 572 |
*cp++ = *(*pp)++; |
| 573 |
continue; |
| 574 |
case T_NUM: |
| 575 |
if (**pp == '}') { |
| 576 |
(*pp)++; |
| 577 |
break; |
| 578 |
} |
| 579 |
if (!isspace(**pp)) |
| 580 |
*cp++ = **pp; |
| 581 |
(*pp)++; |
| 582 |
continue; |
| 583 |
case T_STR: |
| 584 |
if (**pp == ')') { |
| 585 |
(*pp)++; |
| 586 |
break; |
| 587 |
} |
| 588 |
if (!isspace(**pp)) |
| 589 |
*cp++ = **pp; |
| 590 |
(*pp)++; |
| 591 |
continue; |
| 592 |
} |
| 593 |
break; |
| 594 |
} |
| 595 |
*cp = '\0'; |
| 596 |
return(type | width); |
| 597 |
} |
| 598 |
|
| 599 |
|
| 600 |
struct strvar * |
| 601 |
getsvar( /* get string variable */ |
| 602 |
char *svname |
| 603 |
) |
| 604 |
{ |
| 605 |
register struct strvar *sv; |
| 606 |
|
| 607 |
for (sv = svhead; sv != NULL; sv = sv->next) |
| 608 |
if (!strcmp(sv->name, svname)) |
| 609 |
return(sv); |
| 610 |
sv = (struct strvar *)emalloc(sizeof(struct strvar)); |
| 611 |
sv->name = savqstr(svname); |
| 612 |
sv->val = sv->preset = NULL; |
| 613 |
sv->next = svhead; |
| 614 |
svhead = sv; |
| 615 |
return(sv); |
| 616 |
} |
| 617 |
|
| 618 |
|
| 619 |
static void |
| 620 |
svpreset( /* preset a string variable */ |
| 621 |
char *eqn |
| 622 |
) |
| 623 |
{ |
| 624 |
register struct strvar *sv; |
| 625 |
register char *val; |
| 626 |
|
| 627 |
for (val = eqn; *val != '='; val++) |
| 628 |
if (!*val) |
| 629 |
return; |
| 630 |
*val++ = '\0'; |
| 631 |
sv = getsvar(eqn); |
| 632 |
if (sv->preset != NULL) |
| 633 |
freqstr(sv->preset); |
| 634 |
if (sv->val != NULL) |
| 635 |
freqstr(sv->val); |
| 636 |
sv->val = sv->preset = savqstr(val); |
| 637 |
*--val = '='; |
| 638 |
} |
| 639 |
|
| 640 |
|
| 641 |
static void |
| 642 |
clearrec(void) /* clear input record variables */ |
| 643 |
{ |
| 644 |
register struct field *f; |
| 645 |
|
| 646 |
for (f = inpfmt; f != NULL; f = f->next) |
| 647 |
switch (f->type & F_TYP) { |
| 648 |
case T_NUM: |
| 649 |
dremove(f->f.nv); |
| 650 |
break; |
| 651 |
case T_STR: |
| 652 |
if (f->f.sv->val != f->f.sv->preset) { |
| 653 |
freqstr(f->f.sv->val); |
| 654 |
f->f.sv->val = f->f.sv->preset; |
| 655 |
} |
| 656 |
break; |
| 657 |
} |
| 658 |
} |
| 659 |
|
| 660 |
|
| 661 |
static int |
| 662 |
getrec(void) /* get next record from file */ |
| 663 |
{ |
| 664 |
int eatline; |
| 665 |
register struct field *f; |
| 666 |
|
| 667 |
while (ipb.chr != EOF) { |
| 668 |
if (blnkeq) { /* beware of nbsynch() */ |
| 669 |
while (isblnk(ipb.chr)) |
| 670 |
resetinp(); |
| 671 |
if (ipb.chr == EOF) |
| 672 |
return(0); |
| 673 |
} |
| 674 |
eatline = (!igneol && ipb.chr != '\n'); |
| 675 |
clearrec(); /* start with fresh record */ |
| 676 |
for (f = inpfmt; f != NULL; f = f->next) |
| 677 |
if (getfield(f) == -1) |
| 678 |
break; |
| 679 |
if (f == NULL) { |
| 680 |
advinp(); /* got one! */ |
| 681 |
return(1); |
| 682 |
} |
| 683 |
resetinp(); /* eat false start */ |
| 684 |
if (eatline) { /* eat rest of line */ |
| 685 |
while (ipb.chr != '\n') { |
| 686 |
if (ipb.chr == EOF) |
| 687 |
return(0); |
| 688 |
resetinp(); |
| 689 |
} |
| 690 |
resetinp(); |
| 691 |
} |
| 692 |
} |
| 693 |
return(0); |
| 694 |
} |
| 695 |
|
| 696 |
|
| 697 |
static int |
| 698 |
getfield( /* get next field */ |
| 699 |
register struct field *f |
| 700 |
) |
| 701 |
{ |
| 702 |
static char buf[RMAXWORD+1]; /* no recursion! */ |
| 703 |
int delim, inword; |
| 704 |
double d; |
| 705 |
char *np; |
| 706 |
register char *cp; |
| 707 |
|
| 708 |
switch (f->type & F_TYP) { |
| 709 |
case T_LIT: |
| 710 |
cp = f->f.sl; |
| 711 |
do { |
| 712 |
if (blnkeq && isblnk(*cp)) { |
| 713 |
if (!isblnk(ipb.chr)) |
| 714 |
return(-1); |
| 715 |
do |
| 716 |
cp++; |
| 717 |
while (isblnk(*cp)); |
| 718 |
do |
| 719 |
scaninp(); |
| 720 |
while (isblnk(ipb.chr)); |
| 721 |
} else if (*cp == ipb.chr) { |
| 722 |
cp++; |
| 723 |
scaninp(); |
| 724 |
} else |
| 725 |
return(-1); |
| 726 |
} while (*cp); |
| 727 |
return(0); |
| 728 |
case T_STR: |
| 729 |
if (f->next == NULL || (f->next->type & F_TYP) != T_LIT) |
| 730 |
delim = EOF; |
| 731 |
else |
| 732 |
delim = f->next->f.sl[0]; |
| 733 |
cp = buf; |
| 734 |
do { |
| 735 |
if (ipb.chr == EOF || ipb.chr == '\n') |
| 736 |
inword = 0; |
| 737 |
else if (blnkeq && delim != EOF) |
| 738 |
inword = isblnk(delim) ? |
| 739 |
!isblnk(ipb.chr) |
| 740 |
: ipb.chr != delim; |
| 741 |
else |
| 742 |
inword = cp-buf < (f->type & F_WID); |
| 743 |
if (inword) { |
| 744 |
*cp++ = ipb.chr; |
| 745 |
scaninp(); |
| 746 |
} |
| 747 |
} while (inword && cp < &buf[RMAXWORD]); |
| 748 |
*cp = '\0'; |
| 749 |
if (f->f.sv->val == NULL) |
| 750 |
f->f.sv->val = savqstr(buf); /* first setting */ |
| 751 |
else if (strcmp(f->f.sv->val, buf)) |
| 752 |
return(-1); /* doesn't match! */ |
| 753 |
return(0); |
| 754 |
case T_NUM: |
| 755 |
if (f->next == NULL || (f->next->type & F_TYP) != T_LIT) |
| 756 |
delim = EOF; |
| 757 |
else |
| 758 |
delim = f->next->f.sl[0]; |
| 759 |
np = NULL; |
| 760 |
cp = buf; |
| 761 |
do { |
| 762 |
if (!((np==NULL&&isblnk(ipb.chr)) || isnum(ipb.chr))) |
| 763 |
inword = 0; |
| 764 |
else if (blnkeq && delim != EOF) |
| 765 |
inword = isblnk(delim) ? |
| 766 |
!isblnk(ipb.chr) |
| 767 |
: ipb.chr != delim; |
| 768 |
else |
| 769 |
inword = cp-buf < (f->type & F_WID); |
| 770 |
if (inword) { |
| 771 |
if (np==NULL && !isblnk(ipb.chr)) |
| 772 |
np = cp; |
| 773 |
*cp++ = ipb.chr; |
| 774 |
scaninp(); |
| 775 |
} |
| 776 |
} while (inword && cp < &buf[RMAXWORD]); |
| 777 |
*cp = '\0'; |
| 778 |
d = np==NULL ? 0. : atof(np); |
| 779 |
if (!vardefined(f->f.nv)) |
| 780 |
varset(f->f.nv, '=', d); /* first setting */ |
| 781 |
else if ((d = (varvalue(f->f.nv)-d)/(d==0.?1.:d)) > .001 |
| 782 |
|| d < -.001) |
| 783 |
return(-1); /* doesn't match! */ |
| 784 |
return(0); |
| 785 |
} |
| 786 |
return -1; /* pro forma return */ |
| 787 |
} |
| 788 |
|
| 789 |
|
| 790 |
static void |
| 791 |
putrec(void) /* output a record */ |
| 792 |
{ |
| 793 |
char fmt[32]; |
| 794 |
register int n; |
| 795 |
register struct field *f; |
| 796 |
int adlast, adnext; |
| 797 |
|
| 798 |
adlast = 0; |
| 799 |
for (f = outfmt; f != NULL; f = f->next) { |
| 800 |
adnext = blnkeq && |
| 801 |
f->next != NULL && |
| 802 |
!( (f->next->type&F_TYP) == T_LIT && |
| 803 |
f->next->f.sl[0] == ' ' ); |
| 804 |
switch (f->type & F_TYP) { |
| 805 |
case T_LIT: |
| 806 |
fputs(f->f.sl, stdout); |
| 807 |
adlast = f->f.sl[(f->type&F_WID)-1] != ' '; |
| 808 |
break; |
| 809 |
case T_STR: |
| 810 |
if (f->f.sv->val == NULL) { |
| 811 |
eputs(f->f.sv->name); |
| 812 |
eputs(": undefined string\n"); |
| 813 |
quit(1); |
| 814 |
} |
| 815 |
n = (int)(f->type & F_WID) - strlen(f->f.sv->val); |
| 816 |
if (adlast) |
| 817 |
fputs(f->f.sv->val, stdout); |
| 818 |
if (!(adlast && adnext)) |
| 819 |
while (n-- > 0) |
| 820 |
putchar(' '); |
| 821 |
if (!adlast) |
| 822 |
fputs(f->f.sv->val, stdout); |
| 823 |
adlast = 1; |
| 824 |
break; |
| 825 |
case T_NUM: |
| 826 |
n = f->type & F_WID; |
| 827 |
if (adlast && adnext) |
| 828 |
strcpy(fmt, "%g"); |
| 829 |
else if (adlast) |
| 830 |
sprintf(fmt, "%%-%dg", n); |
| 831 |
else |
| 832 |
sprintf(fmt, "%%%dg", n); |
| 833 |
printf(fmt, evalue(f->f.ne)); |
| 834 |
adlast = 1; |
| 835 |
break; |
| 836 |
} |
| 837 |
} |
| 838 |
} |
| 839 |
|
| 840 |
|
| 841 |
static void |
| 842 |
initinp(FILE *fp) /* prepare lookahead buffer */ |
| 843 |
|
| 844 |
{ |
| 845 |
ipb.fin = fp; |
| 846 |
ipb.beg = ipb.end = inpbuf; |
| 847 |
ipb.pos = inpbuf-1; /* position before beginning */ |
| 848 |
ipb.chr = '\0'; |
| 849 |
scaninp(); |
| 850 |
} |
| 851 |
|
| 852 |
|
| 853 |
static void |
| 854 |
scaninp(void) /* scan next character */ |
| 855 |
{ |
| 856 |
if (ipb.chr == EOF) |
| 857 |
return; |
| 858 |
if (++ipb.pos >= &inpbuf[INBSIZ]) |
| 859 |
ipb.pos = inpbuf; |
| 860 |
if (ipb.pos == ipb.end) { /* new character */ |
| 861 |
if ((ipb.chr = getc(ipb.fin)) != EOF) { |
| 862 |
*ipb.end = ipb.chr; |
| 863 |
if (++ipb.end >= &inpbuf[INBSIZ]) |
| 864 |
ipb.end = inpbuf; |
| 865 |
if (ipb.end == ipb.beg) |
| 866 |
ipb.beg = NULL; |
| 867 |
} |
| 868 |
} else |
| 869 |
ipb.chr = *ipb.pos; |
| 870 |
} |
| 871 |
|
| 872 |
|
| 873 |
static void |
| 874 |
advinp(void) /* move home to current position */ |
| 875 |
{ |
| 876 |
ipb.beg = ipb.pos; |
| 877 |
} |
| 878 |
|
| 879 |
|
| 880 |
static void |
| 881 |
resetinp(void) /* rewind position and advance 1 */ |
| 882 |
{ |
| 883 |
if (ipb.beg == NULL) /* full */ |
| 884 |
ipb.beg = ipb.end; |
| 885 |
ipb.pos = ipb.beg; |
| 886 |
ipb.chr = *ipb.pos; |
| 887 |
if (passive) /* transmit unmatched character? */ |
| 888 |
fputc(ipb.chr, stdout); |
| 889 |
if (++ipb.beg >= &inpbuf[INBSIZ]) |
| 890 |
ipb.beg = inpbuf; |
| 891 |
scaninp(); |
| 892 |
} |
| 893 |
|
| 894 |
|
| 895 |
void |
| 896 |
eputs(char *msg) |
| 897 |
{ |
| 898 |
fputs(msg, stderr); |
| 899 |
} |
| 900 |
|
| 901 |
|
| 902 |
void |
| 903 |
wputs(char *msg) |
| 904 |
{ |
| 905 |
if (!nowarn) |
| 906 |
eputs(msg); |
| 907 |
} |
| 908 |
|
| 909 |
|
| 910 |
void |
| 911 |
quit(int code) |
| 912 |
{ |
| 913 |
exit(code); |
| 914 |
} |
