1 /* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
2 Contributed by Andy Vaught
4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
6 Libgfortran is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 In addition to the permissions in the GNU General Public License, the
12 Free Software Foundation gives you unlimited permission to link the
13 compiled version of this file into combinations with other programs,
14 and to distribute those combinations without any restriction coming
15 from the use of this file. (The General Public License restrictions
16 do apply in other respects; for example, they cover modification of
17 the file, and distribution when not linked into a combine
20 Libgfortran is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with Libgfortran; see the file COPYING. If not, write to
27 the Free Software Foundation, 59 Temple Place - Suite 330,
28 Boston, MA 02111-1307, USA. */
35 #include "libgfortran.h"
39 #define star_fill(p, n) memset(p, '*', n)
43 { SIGN_NONE
, SIGN_MINUS
, SIGN_PLUS
}
48 write_a (fnode
* f
, const char *source
, int len
)
53 wlen
= f
->u
.string
.length
< 0 ? len
: f
->u
.string
.length
;
55 p
= write_block (wlen
);
60 memcpy (p
, source
, wlen
);
63 memset (p
, ' ', wlen
- len
);
64 memcpy (p
+ wlen
- len
, source
, len
);
69 extract_int (const void *p
, int len
)
79 i
= *((const int8_t *) p
);
82 i
= *((const int16_t *) p
);
85 i
= *((const int32_t *) p
);
88 i
= *((const int64_t *) p
);
91 internal_error ("bad integer kind");
98 extract_real (const void *p
, int len
)
104 i
= *((const float *) p
);
107 i
= *((const double *) p
);
110 internal_error ("bad real kind");
117 /* Given a flag that indicate if a value is negative or not, return a
118 sign_t that gives the sign that we need to produce. */
121 calculate_sign (int negative_flag
)
123 sign_t s
= SIGN_NONE
;
128 switch (g
.sign_status
)
137 s
= options
.optional_plus
? SIGN_PLUS
: SIGN_NONE
;
145 /* Returns the value of 10**d. */
148 calculate_exp (int d
)
153 for (i
= 0; i
< (d
>= 0 ? d
: -d
); i
++)
156 r
= (d
>= 0) ? r
: 1.0 / r
;
162 /* Generate corresponding I/O format for FMT_G output.
163 The rules to translate FMT_G to FMT_E or FMT_F from DEC fortran
164 LRM (table 11-2, Chapter 11, "I/O Formatting", P11-25) is:
166 Data Magnitude Equivalent Conversion
167 0< m < 0.1-0.5*10**(-d-1) Ew.d[Ee]
168 m = 0 F(w-n).(d-1), n' '
169 0.1-0.5*10**(-d-1)<= m < 1-0.5*10**(-d) F(w-n).d, n' '
170 1-0.5*10**(-d)<= m < 10-0.5*10**(-d+1) F(w-n).(d-1), n' '
171 10-0.5*10**(-d+1)<= m < 100-0.5*10**(-d+2) F(w-n).(d-2), n' '
172 ................ ..........
173 10**(d-1)-0.5*10**(-1)<= m <10**d-0.5 F(w-n).0,n(' ')
174 m >= 10**d-0.5 Ew.d[Ee]
176 notes: for Gw.d , n' ' means 4 blanks
177 for Gw.dEe, n' ' means e+2 blanks */
180 calculate_G_format (fnode
*f
, double value
, int len
, int *num_blank
)
190 newf
= get_mem (sizeof (fnode
));
192 /* Absolute value. */
193 m
= (value
> 0.0) ? value
: -value
;
195 /* In case of the two data magnitude ranges,
196 generate E editing, Ew.d[Ee]. */
197 exp_d
= calculate_exp (d
);
198 if ((m
> 0.0 && m
< 0.1 - 0.05 / (double) exp_d
)
199 || (m
>= (double) exp_d
- 0.5 ))
201 newf
->format
= FMT_E
;
209 /* Use binary search to find the data magnitude range. */
219 mid
= (low
+ high
) / 2;
221 /* 0.1 * 10**mid - 0.5 * 10**(mid-d-1) */
222 temp
= 0.1 * calculate_exp (mid
) - 0.5 * calculate_exp (mid
- d
- 1);
227 if (ubound
== lbound
+ 1)
234 if (ubound
== lbound
+ 1)
245 /* Pad with blanks where the exponent would be. */
251 /* Generate the F editing. F(w-n).(-(mid-d-1)), n' '. */
252 newf
->format
= FMT_F
;
253 newf
->u
.real
.w
= f
->u
.real
.w
- *num_blank
;
257 newf
->u
.real
.d
= d
- 1;
259 newf
->u
.real
.d
= - (mid
- d
- 1);
261 /* For F editing, the scale factor is ignored. */
267 /* Output a real number according to its format which is FMT_G free. */
270 output_float (fnode
*f
, double value
, int len
)
272 /* This must be large enough to accurately hold any value. */
283 /* Number of digits before the decimal point. */
285 /* Number of zeros after the decimal point. */
287 /* Number of digits after the decimal point. */
298 /* We should always know the field width and precision. */
300 internal_error ("Unspecified precision");
302 /* Use sprintf to print the number in the format +D.DDDDe+ddd
303 For an N digit exponent, this gives us (32-6)-N digits after the
304 decimal point, plus another one before the decimal point. */
305 sign
= calculate_sign (value
< 0.0);
309 /* Printf always prints at least two exponent digits. */
314 edigits
= 1 + (int) log10 (fabs(log10 (value
)));
319 if (ft
== FMT_F
|| ft
== FMT_EN
320 || ((ft
== FMT_D
|| ft
== FMT_E
) && g
.scale_factor
!= 0))
322 /* Always convert at full precision to avoid double rounding. */
323 ndigits
= 27 - edigits
;
327 /* We know the number of digits, so can let printf do the rounding
333 if (ndigits
> 27 - edigits
)
334 ndigits
= 27 - edigits
;
337 sprintf (buffer
, "%+-#31.*e", ndigits
- 1, value
);
339 /* Check the resulting string has punctuation in the correct places. */
340 if (buffer
[2] != '.' || buffer
[ndigits
+ 2] != 'e')
341 internal_error ("printf is broken");
343 /* Read the exponent back in. */
344 e
= atoi (&buffer
[ndigits
+ 3]) + 1;
346 /* Make sure zero comes out as 0.0e0. */
350 /* Normalize the fractional component. */
351 buffer
[2] = buffer
[1];
354 /* Figure out where to place the decimal point. */
358 nbefore
= e
+ g
.scale_factor
;
389 nafter
= (d
- i
) + 1;
405 /* The exponent must be a multiple of three, with 1-3 digits before
406 the decimal point. */
414 nbefore
= 3 - nbefore
;
432 /* Should never happen. */
433 internal_error ("Unexpected format token");
436 /* Round the value. */
437 if (nbefore
+ nafter
== 0)
439 else if (nbefore
+ nafter
< ndigits
)
441 ndigits
= nbefore
+ nafter
;
443 if (digits
[i
] >= '5')
445 /* Propagate the carry. */
446 for (i
--; i
>= 0; i
--)
448 if (digits
[i
] != '9')
458 /* The carry overflowed. Fortunately we have some spare space
459 at the start of the buffer. We may discard some digits, but
460 this is ok because we already know they are zero. */
473 else if (ft
== FMT_EN
)
488 /* Calculate the format of the exponent field. */
492 for (i
= abs (e
); i
>= 10; i
/= 10)
497 /* Width not specified. Must be no more than 3 digits. */
498 if (e
> 999 || e
< -999)
503 if (e
> 99 || e
< -99)
509 /* Exponent width specified, check it is wide enough. */
510 if (edigits
> f
->u
.real
.e
)
513 edigits
= f
->u
.real
.e
+ 2;
519 /* Pick a field size if none was specified. */
521 w
= nbefore
+ nzero
+ nafter
+ 2;
523 /* Create the ouput buffer. */
524 out
= write_block (w
);
528 /* Zero values always output as positive, even if the value was negative
530 for (i
= 0; i
< ndigits
; i
++)
532 if (digits
[i
] != '0')
536 sign
= calculate_sign (0);
538 /* Work out how much padding is needed. */
539 nblanks
= w
- (nbefore
+ nzero
+ nafter
+ edigits
+ 1);
540 if (sign
!= SIGN_NONE
)
543 /* Check the value fits in the specified field width. */
544 if (nblanks
< 0 || edigits
== -1)
550 /* See if we have space for a zero before the decimal point. */
551 if (nbefore
== 0 && nblanks
> 0)
559 /* Padd to full field width. */
562 memset (out
, ' ', nblanks
);
566 /* Output the initial sign (if any). */
567 if (sign
== SIGN_PLUS
)
569 else if (sign
== SIGN_MINUS
)
572 /* Output an optional leading zero. */
576 /* Output the part before the decimal point, padding with zeros. */
579 if (nbefore
> ndigits
)
584 memcpy (out
, digits
, i
);
592 /* Output the decimal point. */
595 /* Output leading zeros after the decimal point. */
598 for (i
= 0; i
< nzero
; i
++)
602 /* Output digits after the decimal point, padding with zeros. */
605 if (nafter
> ndigits
)
610 memcpy (out
, digits
, i
);
619 /* Output the exponent. */
628 snprintf (buffer
, 32, "%+0*d", edigits
, e
);
630 sprintf (buffer
, "%+0*d", edigits
, e
);
632 memcpy (out
, buffer
, edigits
);
638 write_l (fnode
* f
, char *source
, int len
)
643 p
= write_block (f
->u
.w
);
647 memset (p
, ' ', f
->u
.w
- 1);
648 n
= extract_int (source
, len
);
649 p
[f
->u
.w
- 1] = (n
) ? 'T' : 'F';
652 /* Output a real number according to its format. */
655 write_float (fnode
*f
, const char *source
, int len
)
662 n
= extract_real (source
, len
);
664 if (f
->format
!= FMT_B
&& f
->format
!= FMT_O
&& f
->format
!= FMT_Z
)
670 p
= write_block (nb
);
687 memcpy(p
+ nb
- 8, "Infinity", 8);
689 memcpy(p
+ nb
- 3, "Inf", 3);
690 if (nb
< 8 && nb
> 3)
696 memcpy(p
+ nb
- 3, "NaN", 3);
701 if (f
->format
!= FMT_G
)
703 output_float (f
, n
, len
);
707 f2
= calculate_G_format(f
, n
, len
, &nb
);
708 output_float (f2
, n
, len
);
714 p
= write_block (nb
);
722 write_int (fnode
*f
, const char *source
, int len
, char *(*conv
) (uint64_t))
726 int w
, m
, digits
, nzero
, nblank
;
732 n
= extract_int (source
, len
);
736 if (m
== 0 && n
== 0)
760 /* Select a width if none was specified. The idea here is to always
764 w
= ((digits
< m
) ? m
: digits
);
774 /* See if things will work. */
776 nblank
= w
- (nzero
+ digits
);
784 memset (p
, ' ', nblank
);
787 memset (p
, '0', nzero
);
790 memcpy (p
, q
, digits
);
797 write_decimal (fnode
*f
, const char *source
, int len
, char *(*conv
) (int64_t))
800 int w
, m
, digits
, nsign
, nzero
, nblank
;
807 n
= extract_int (source
, len
);
811 if (m
== 0 && n
== 0)
824 sign
= calculate_sign (n
< 0);
828 nsign
= sign
== SIGN_NONE
? 0 : 1;
833 /* Select a width if none was specified. The idea here is to always
837 w
= ((digits
< m
) ? m
: digits
) + nsign
;
847 /* See if things will work. */
849 nblank
= w
- (nsign
+ nzero
+ digits
);
857 memset (p
, ' ', nblank
);
872 memset (p
, '0', nzero
);
875 memcpy (p
, q
, digits
);
882 /* Convert unsigned octal to ascii. */
896 p
= scratch
+ sizeof (SCRATCH_SIZE
) - 1;
910 /* Convert unsigned binary to ascii. */
924 p
= scratch
+ sizeof (SCRATCH_SIZE
) - 1;
929 *p
-- = '0' + (n
& 1);
938 write_i (fnode
* f
, const char *p
, int len
)
940 write_decimal (f
, p
, len
, (void *) gfc_itoa
);
945 write_b (fnode
* f
, const char *p
, int len
)
947 write_int (f
, p
, len
, btoa
);
952 write_o (fnode
* f
, const char *p
, int len
)
954 write_int (f
, p
, len
, otoa
);
958 write_z (fnode
* f
, const char *p
, int len
)
960 write_int (f
, p
, len
, xtoa
);
965 write_d (fnode
*f
, const char *p
, int len
)
967 write_float (f
, p
, len
);
972 write_e (fnode
*f
, const char *p
, int len
)
974 write_float (f
, p
, len
);
979 write_f (fnode
*f
, const char *p
, int len
)
981 write_float (f
, p
, len
);
986 write_en (fnode
*f
, const char *p
, int len
)
988 write_float (f
, p
, len
);
993 write_es (fnode
*f
, const char *p
, int len
)
995 write_float (f
, p
, len
);
999 /* Take care of the X/TR descriptor. */
1006 p
= write_block (f
->u
.n
);
1010 memset (p
, ' ', f
->u
.n
);
1014 /* List-directed writing. */
1017 /* Write a single character to the output. Returns nonzero if
1018 something goes wrong. */
1025 p
= write_block (1);
1035 /* Write a list-directed logical value. */
1038 write_logical (const char *source
, int length
)
1040 write_char (extract_int (source
, length
) ? 'T' : 'F');
1044 /* Write a list-directed integer value. */
1047 write_integer (const char *source
, int length
)
1054 q
= gfc_itoa (extract_int (source
, length
));
1079 digits
= strlen (q
);
1083 p
= write_block (width
) ;
1085 memset(p
,' ', width
- digits
) ;
1086 memcpy (p
+ width
- digits
, q
, digits
);
1090 /* Write a list-directed string. We have to worry about delimiting
1091 the strings if the file has been opened in that mode. */
1094 write_character (const char *source
, int length
)
1099 switch (current_unit
->flags
.delim
)
1101 case DELIM_APOSTROPHE
:
1118 for (i
= 0; i
< length
; i
++)
1123 p
= write_block (length
+ extra
);
1128 memcpy (p
, source
, length
);
1133 for (i
= 0; i
< length
; i
++)
1145 /* Output a real number with default format.
1146 This is 1PG14.7E2 for REAL(4) and 1PG23.15E3 for REAL(8). */
1149 write_real (const char *source
, int length
)
1152 int org_scale
= g
.scale_factor
;
1167 write_float (&f
, source
, length
);
1168 g
.scale_factor
= org_scale
;
1173 write_complex (const char *source
, int len
)
1175 if (write_char ('('))
1177 write_real (source
, len
);
1179 if (write_char (','))
1181 write_real (source
+ len
, len
);
1187 /* Write the separator between items. */
1190 write_separator (void)
1194 p
= write_block (options
.separator_len
);
1198 memcpy (p
, options
.separator
, options
.separator_len
);
1202 /* Write an item with list formatting.
1203 TODO: handle skipping to the next record correctly, particularly
1207 list_formatted_write (bt type
, void *p
, int len
)
1209 static int char_flag
;
1211 if (current_unit
== NULL
)
1222 if (type
!= BT_CHARACTER
|| !char_flag
||
1223 current_unit
->flags
.delim
!= DELIM_NONE
)
1230 write_integer (p
, len
);
1233 write_logical (p
, len
);
1236 write_character (p
, len
);
1239 write_real (p
, len
);
1242 write_complex (p
, len
);
1245 internal_error ("list_formatted_write(): Bad type");
1248 char_flag
= (type
== BT_CHARACTER
);
1252 namelist_write (void)
1254 namelist_info
* t1
, *t2
;
1259 write_character("&",1);
1260 write_character (ioparm
.namelist_name
, ioparm
.namelist_name_len
);
1261 write_character("\n",1);
1273 write_character(t2
->var_name
, strlen(t2
->var_name
));
1274 write_character("=",1);
1281 write_integer (p
, len
);
1284 write_logical (p
, len
);
1287 write_character (p
, t2
->string_length
);
1290 write_real (p
, len
);
1293 write_complex (p
, len
);
1296 internal_error ("Bad type for namelist write");
1298 write_character(",",1);
1302 write_character("\n",1);
1306 write_character("/",1);