--- /dev/null
+/* __gmp_doprnt -- printf style formatted output.
+
+ THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY. THEY'RE ALMOST
+ CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN
+ FUTURE GNU MP RELEASES.
+
+Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MP Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
+
+#define _GNU_SOURCE /* for DECIMAL_POINT in glibc langinfo.h */
+
+#include "config.h"
+
+#if HAVE_STDARG
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+#include <ctype.h> /* for isdigit */
+#include <stddef.h> /* for ptrdiff_t */
+#include <string.h>
+#include <stdio.h> /* for NULL */
+#include <stdlib.h>
+
+#if HAVE_INTTYPES_H
+# include <inttypes.h> /* for intmax_t */
+#else
+# if HAVE_STDINT_H
+# include <stdint.h>
+# endif
+#endif
+
+#if HAVE_LANGINFO_H
+#include <langinfo.h> /* for nl_langinfo */
+#endif
+
+#if HAVE_LOCALE_H
+#include <locale.h> /* for localeconv */
+#endif
+
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h> /* for quad_t */
+#endif
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+
+/* change this to "#define TRACE(x) x" for diagnostics */
+#define TRACE(x)
+
+
+/* Should be portable, but in any case this is only used under some ASSERTs. */
+#define va_equal(x, y) \
+ (memcmp (&(x), &(y), sizeof(va_list)) == 0)
+
+
+/* printf is convenient because it allows various types to be printed in one
+ fairly compact call, so having gmp_printf support the standard types as
+ well as the gmp ones is important. This ends up meaning all the standard
+ parsing must be duplicated, to get a new routine recognising the gmp
+ extras.
+
+ With the currently favoured handling of mpz etc as Z, Q and F type
+ markers, it's not possible to use glibc register_printf_function since
+ that only accepts new conversion characters, not new types. If Z was a
+ conversion there'd be no way to specify hex, decimal or octal, or
+ similarly with F no way to specify fixed point or scientific format.
+
+ It seems wisest to pass conversions %f, %e and %g of float, double and
+ long double over to the standard printf. It'd be hard to be sure of
+ getting the right handling for NaNs, rounding, etc. Integer conversions
+ %d etc and string conversions %s on the other hand could be easily enough
+ handled within gmp_doprnt, but if floats are going to libc then it's just
+ as easy to send all non-gmp types there.
+
+ "Z" was a type marker for size_t in old glibc, but there seems no need to
+ provide access to that now "z" is standard.
+
+ In GMP 4.1.1 we documented "ll" and "L" as being equivalent, but in C99
+ in fact "ll" is just for long long and "L" just for long double.
+ Apparentely GLIBC allows "L" for long long though. This doesn't affect
+ us as such, since both are passed through to the C library. To be
+ consistent with what we said before, the two are treated equivalently
+ here, and it's left to the C library to do what it thinks with them.
+
+ Possibilities:
+
+ "b" might be nice for binary output, and could even be supported for the
+ standard C types too if desired.
+
+ POSIX style "%n$" parameter numbering would be possible, but would need
+ to be handled completely within gmp_doprnt, since the numbering will be
+ all different once the format string it cut into pieces.
+
+ Some options for mpq formatting would be good. Perhaps a non-zero
+ precision field could give a width for the denominator and mean always
+ put a "/". A form "n+p/q" might interesting too, though perhaps that's
+ better left to applications.
+
+ Right now there's no way for an application to know whether types like
+ intmax_t are supported here. If configure is doing its job and the same
+ compiler is used for gmp as for the application then there shouldn't be
+ any problem, but perhaps gmp.h should have some preprocessor symbols to
+ say what libgmp can do. */
+
+
+
+/* If a gmp format is the very first thing or there are two gmp formats with
+ nothing in between then we'll reach here with this_fmt == last_fmt and we
+ can do nothing in that case.
+
+ last_ap is always replaced after a FLUSH, so it doesn't matter if va_list
+ is a call-by-reference and the funs->format routine modifies it. */
+
+#define FLUSH() \
+ do { \
+ if (this_fmt == last_fmt) \
+ { \
+ TRACE (printf ("nothing to flush\n")); \
+ ASSERT (va_equal (this_ap, last_ap)); \
+ } \
+ else \
+ { \
+ ASSERT (*this_fmt == '%'); \
+ *this_fmt = '\0'; \
+ TRACE (printf ("flush \"%s\"\n", last_fmt)); \
+ DOPRNT_FORMAT (last_fmt, last_ap); \
+ } \
+ } while (0)
+
+
+/* Parse up the given format string and do the appropriate output using the
+ given "funs" routines. The data parameter is passed through to those
+ routines. */
+
+int
+__gmp_doprnt (const struct doprnt_funs_t *funs, void *data,
+ const char *orig_fmt, va_list orig_ap)
+{
+ va_list ap, this_ap, last_ap;
+ size_t alloc_fmt_size;
+ char *fmt, *alloc_fmt, *last_fmt, *this_fmt, *gmp_str;
+ int retval = 0;
+ int type, fchar, *value, seen_precision;
+ struct doprnt_params_t param;
+
+ TRACE (printf ("gmp_doprnt \"%s\"\n", orig_fmt));
+
+ /* Don't modify orig_ap, if va_list is actually an array and hence call by
+ reference. It could be argued that it'd be more efficient to leave the
+ caller to make a copy if it cared, but doing so here is going to be a
+ very small part of the total work, and we may as well keep applications
+ out of trouble. */
+ va_copy (ap, orig_ap);
+
+ /* The format string is chopped up into pieces to be passed to
+ funs->format. Unfortunately that means it has to be copied so each
+ piece can be null-terminated. We're not going to be very fast here, so
+ use __gmp_allocate_func rather than TMP_ALLOC, to avoid overflowing the
+ stack if a long output string is given. */
+ alloc_fmt_size = strlen (orig_fmt) + 1;
+#if _LONG_LONG_LIMB
+ /* for a long long limb we change %Mx to %llx, so could need an extra 1
+ char for every 3 existing */
+ alloc_fmt_size += alloc_fmt_size / 3;
+#endif
+ alloc_fmt = __GMP_ALLOCATE_FUNC_TYPE (alloc_fmt_size, char);
+ fmt = alloc_fmt;
+ strcpy (fmt, orig_fmt);
+
+ /* last_fmt and last_ap are just after the last output, and hence where
+ the next output will begin, when that's done */
+ last_fmt = fmt;
+ va_copy (last_ap, ap);
+
+ for (;;)
+ {
+ TRACE (printf ("next: \"%s\"\n", fmt));
+
+ fmt = strchr (fmt, '%');
+ if (fmt == NULL)
+ break;
+
+ /* this_fmt and this_ap are the current '%' sequence being considered */
+ this_fmt = fmt;
+ va_copy (this_ap, ap);
+ fmt++; /* skip the '%' */
+
+ TRACE (printf ("considering\n");
+ printf (" last: \"%s\"\n", last_fmt);
+ printf (" this: \"%s\"\n", this_fmt));
+
+ type = '\0';
+ value = ¶m.width;
+
+ param.base = 10;
+ param.conv = 0;
+ param.expfmt = "e%c%02d";
+ param.exptimes4 = 0;
+ param.fill = ' ';
+ param.justify = DOPRNT_JUSTIFY_RIGHT;
+ param.prec = 6;
+ param.showbase = DOPRNT_SHOWBASE_NO;
+ param.showpoint = 0;
+ param.showtrailing = 1;
+ param.sign = '\0';
+ param.width = 0;
+ seen_precision = 0;
+
+ /* This loop parses a single % sequence. "break" from the switch
+ means continue with this %, "goto next" means the conversion
+ character has been seen and a new % should be sought. */
+ for (;;)
+ {
+ fchar = *fmt++;
+ if (fchar == '\0')
+ break;
+
+ switch (fchar) {
+
+ case 'a':
+ /* %a behaves like %e, but defaults to all significant digits,
+ and there's no leading zeros on the exponent (which is in
+ fact bit-based) */
+ param.base = 16;
+ param.expfmt = "p%c%d";
+ goto conv_a;
+ case 'A':
+ param.base = -16;
+ param.expfmt = "P%c%d";
+ conv_a:
+ param.conv = DOPRNT_CONV_SCIENTIFIC;
+ param.exptimes4 = 1;
+ if (! seen_precision)
+ param.prec = -1; /* default to all digits */
+ param.showbase = DOPRNT_SHOWBASE_YES;
+ param.showtrailing = 1;
+ goto floating_a;
+
+ case 'c':
+ /* Let's assume wchar_t will be promoted to "int" in the call,
+ the same as char will be. */
+ (void) va_arg (ap, int);
+ goto next;
+
+ case 'd':
+ case 'i':
+ case 'u':
+ integer:
+ TRACE (printf ("integer, base=%d\n", param.base));
+ if (! seen_precision)
+ param.prec = -1;
+ switch (type) {
+ case 'j':
+ /* Let's assume uintmax_t is the same size as intmax_t. */
+#if HAVE_INTMAX_T
+ (void) va_arg (ap, intmax_t);
+#else
+ ASSERT_FAIL (intmax_t not available);
+#endif
+ break;
+ case 'l':
+ (void) va_arg (ap, long);
+ break;
+ case 'L':
+#if HAVE_LONG_LONG
+ (void) va_arg (ap, long long);
+#else
+ ASSERT_FAIL (long long not available);
+#endif
+ break;
+ case 'N':
+ {
+ mp_ptr xp;
+ mp_size_t xsize, abs_xsize;
+ mpz_t z;
+ FLUSH ();
+ xp = va_arg (ap, mp_ptr);
+ PTR(z) = xp;
+ xsize = (int) va_arg (ap, mp_size_t);
+ abs_xsize = ABS (xsize);
+ MPN_NORMALIZE (xp, abs_xsize);
+ SIZ(z) = (xsize >= 0 ? abs_xsize : -abs_xsize);
+ ASSERT_CODE (ALLOC(z) = abs_xsize);
+ gmp_str = mpz_get_str (NULL, param.base, z);
+ goto gmp_integer;
+ }
+ /* break; */
+ case 'q':
+ /* quad_t is probably the same as long long, but let's treat
+ it separately just to be sure. Also let's assume u_quad_t
+ will be the same size as quad_t. */
+#if HAVE_QUAD_T
+ (void) va_arg (ap, quad_t);
+#else
+ ASSERT_FAIL (quad_t not available);
+#endif
+ break;
+ case 'Q':
+ FLUSH ();
+ gmp_str = mpq_get_str (NULL, param.base, va_arg(ap, mpq_srcptr));
+ goto gmp_integer;
+ case 't':
+#if HAVE_PTRDIFF_T
+ (void) va_arg (ap, ptrdiff_t);
+#else
+ ASSERT_FAIL (ptrdiff_t not available);
+#endif
+ break;
+ case 'z':
+ (void) va_arg (ap, size_t);
+ break;
+ case 'Z':
+ {
+ int ret;
+ FLUSH ();
+ gmp_str = mpz_get_str (NULL, param.base,
+ va_arg (ap, mpz_srcptr));
+ gmp_integer:
+ ret = __gmp_doprnt_integer (funs, data, ¶m, gmp_str);
+ (*__gmp_free_func) (gmp_str, strlen(gmp_str)+1);
+ DOPRNT_ACCUMULATE (ret);
+ va_copy (last_ap, ap);
+ last_fmt = fmt;
+ }
+ break;
+ default:
+ /* default is an "int", and this includes h=short and hh=char
+ since they're promoted to int in a function call */
+ (void) va_arg (ap, int);
+ break;
+ }
+ goto next;
+
+ case 'E':
+ param.base = -10;
+ param.expfmt = "E%c%02d";
+ /*FALLTHRU*/
+ case 'e':
+ param.conv = DOPRNT_CONV_SCIENTIFIC;
+ floating:
+ if (param.showbase == DOPRNT_SHOWBASE_NONZERO)
+ {
+ /* # in %e, %f and %g */
+ param.showpoint = 1;
+ param.showtrailing = 1;
+ }
+ floating_a:
+ switch (type) {
+ case 'F':
+ FLUSH ();
+ DOPRNT_ACCUMULATE (__gmp_doprnt_mpf (funs, data, ¶m,
+ GMP_DECIMAL_POINT,
+ va_arg (ap, mpf_srcptr)));
+ va_copy (last_ap, ap);
+ last_fmt = fmt;
+ break;
+ case 'L':
+#if HAVE_LONG_DOUBLE
+ (void) va_arg (ap, long double);
+#else
+ ASSERT_FAIL (long double not available);
+#endif
+ break;
+ default:
+ (void) va_arg (ap, double);
+ break;
+ }
+ goto next;
+
+ case 'f':
+ param.conv = DOPRNT_CONV_FIXED;
+ goto floating;
+
+ case 'F': /* mpf_t */
+ case 'j': /* intmax_t */
+ case 'L': /* long long */
+ case 'N': /* mpn */
+ case 'q': /* quad_t */
+ case 'Q': /* mpq_t */
+ case 't': /* ptrdiff_t */
+ case 'z': /* size_t */
+ case 'Z': /* mpz_t */
+ set_type:
+ type = fchar;
+ break;
+
+ case 'G':
+ param.base = -10;
+ param.expfmt = "E%c%02d";
+ /*FALLTHRU*/
+ case 'g':
+ param.conv = DOPRNT_CONV_GENERAL;
+ param.showtrailing = 0;
+ goto floating;
+
+ case 'h':
+ if (type != 'h')
+ goto set_type;
+ type = 'H'; /* internal code for "hh" */
+ break;
+
+ case 'l':
+ if (type != 'l')
+ goto set_type;
+ type = 'L'; /* "ll" means "L" */
+ break;
+
+ case 'm':
+ /* glibc strerror(errno), no argument */
+ goto next;
+
+ case 'M': /* mp_limb_t */
+ /* mung format string to l or ll and let plain printf handle it */
+#if _LONG_LONG_LIMB
+ memmove (fmt+1, fmt, strlen (fmt)+1);
+ fmt[-1] = 'l';
+ fmt[0] = 'l';
+ fmt++;
+ type = 'L';
+#else
+ fmt[-1] = 'l';
+ type = 'l';
+#endif
+ break;
+
+ case 'n':
+ {
+ void *p;
+ FLUSH ();
+ p = va_arg (ap, void *);
+ switch (type) {
+ case '\0': * (int *) p = retval; break;
+ case 'F': mpf_set_si ((mpf_ptr) p, (long) retval); break;
+ case 'H': * (char *) p = retval; break;
+ case 'h': * (short *) p = retval; break;
+#if HAVE_INTMAX_T
+ case 'j': * (intmax_t *) p = retval; break;
+#else
+ case 'j': ASSERT_FAIL (intmax_t not available); break;
+#endif
+ case 'l': * (long *) p = retval; break;
+#if HAVE_QUAD_T && HAVE_LONG_LONG
+ case 'q':
+ ASSERT_ALWAYS (sizeof (quad_t) == sizeof (long long));
+ /*FALLTHRU*/
+#else
+ case 'q': ASSERT_FAIL (quad_t not available); break;
+#endif
+#if HAVE_LONG_LONG
+ case 'L': * (long long *) p = retval; break;
+#else
+ case 'L': ASSERT_FAIL (long long not available); break;
+#endif
+ case 'N':
+ {
+ mp_size_t n;
+ n = va_arg (ap, mp_size_t);
+ n = ABS (n);
+ if (n != 0)
+ {
+ * (mp_ptr) p = retval;
+ MPN_ZERO ((mp_ptr) p + 1, n - 1);
+ }
+ }
+ break;
+ case 'Q': mpq_set_si ((mpq_ptr) p, (long) retval, 1L); break;
+#if HAVE_PTRDIFF_T
+ case 't': * (ptrdiff_t *) p = retval; break;
+#else
+ case 't': ASSERT_FAIL (ptrdiff_t not available); break;
+#endif
+ case 'z': * (size_t *) p = retval; break;
+ case 'Z': mpz_set_si ((mpz_ptr) p, (long) retval); break;
+ }
+ }
+ va_copy (last_ap, ap);
+ last_fmt = fmt;
+ goto next;
+
+ case 'o':
+ param.base = 8;
+ goto integer;
+
+ case 'p':
+ case 's':
+ /* "void *" will be good enough for "char *" or "wchar_t *", no
+ need for separate code. */
+ (void) va_arg (ap, const void *);
+ goto next;
+
+ case 'x':
+ param.base = 16;
+ goto integer;
+ case 'X':
+ param.base = -16;
+ goto integer;
+
+ case '%':
+ goto next;
+
+ case '#':
+ param.showbase = DOPRNT_SHOWBASE_NONZERO;
+ break;
+
+ case '\'':
+ /* glibc digit grouping, just pass it through, no support for it
+ on gmp types */
+ break;
+
+ case '+':
+ case ' ':
+ param.sign = fchar;
+ break;
+
+ case '-':
+ param.justify = DOPRNT_JUSTIFY_LEFT;
+ break;
+ case '.':
+ seen_precision = 1;
+ param.prec = -1; /* "." alone means all necessary digits */
+ value = ¶m.prec;
+ break;
+
+ case '*':
+ {
+ int n = va_arg (ap, int);
+
+ if (value == ¶m.width)
+ {
+ /* negative width means left justify */
+ if (n < 0)
+ {
+ param.justify = DOPRNT_JUSTIFY_LEFT;
+ n = -n;
+ }
+ param.width = n;
+ }
+ else
+ {
+ /* don't allow negative precision */
+ param.prec = MAX (0, n);
+ }
+ }
+ break;
+
+ case '0':
+ if (value == ¶m.width)
+ {
+ /* in width field, set fill */
+ param.fill = '0';
+
+ /* for right justify, put the fill after any minus sign */
+ if (param.justify == DOPRNT_JUSTIFY_RIGHT)
+ param.justify = DOPRNT_JUSTIFY_INTERNAL;
+ }
+ else
+ {
+ /* in precision field, set value */
+ *value = 0;
+ }
+ break;
+
+ case '1': case '2': case '3': case '4': case '5':
+ case '6': case '7': case '8': case '9':
+ /* process all digits to form a value */
+ {
+ int n = 0;
+ do {
+ n = n * 10 + (fchar-'0');
+ fchar = *fmt++;
+ } while (isascii (fchar) && isdigit (fchar));
+ fmt--; /* unget the non-digit */
+ *value = n;
+ }
+ break;
+
+ default:
+ /* something invalid */
+ ASSERT (0);
+ goto next;
+ }
+ }
+
+ next:
+ /* Stop parsing the current "%" format, look for a new one. */
+ ;
+ }
+
+ TRACE (printf ("remainder: \"%s\"\n", last_fmt));
+ if (*last_fmt != '\0')
+ DOPRNT_FORMAT (last_fmt, last_ap);
+
+ if (funs->final != NULL)
+ if ((*funs->final) (data) == -1)
+ goto error;
+
+ done:
+ (*__gmp_free_func) (alloc_fmt, alloc_fmt_size);
+ return retval;
+
+ error:
+ retval = -1;
+ goto done;
+}
projects / msp430-gcc.git / blobdiff