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2e66995c01
Estimated hours taken: 8
Branches: main
Fix the I/O routines for floats so that can roundtrip.
library/string.m:
Ensure that string__float_to_string returns a float that is
round-trippable. On the C backend we do that by starting at the min
precision required and increasing it until the float roundtrips.
This functionality is provided by ML_sprintf_float, so that it can
be reused in io.m. On the IL backend the R flag guarantees that a
double will be round-trippable, so we just use that.
Change string__to_float so that it uses the format string for the
precision float that we are using, and export this predicate for use
by the trace system.
Delete the unused string__float_to_f_string.
library/io.m:
Print round-tripable floats in io__write_float.
For the C backend use ML_sprintf_float to avoid unnecessary string
allocation. For other backends use string__float_to_string to
generate a valid float.
trace/mercury_trace_util.c:
Rather than duplicating the code from the library, call the code in
the library.
tests/general/Mmakefile:
tests/general/float_roundtrip.exp:
tests/general/float_roundtrip.m:
Test that floats roundtrip for different required miniumum
precisions.
152 lines
3.2 KiB
C
152 lines
3.2 KiB
C
/*
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** Copyright (C) 2000-2002 The University of Melbourne.
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** This file may only be copied under the terms of the GNU Library General
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** Public License - see the file COPYING.LIB in the Mercury distribution.
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*/
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/*
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** This file contains utility functions that can be used by any or all
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** of the various kinds of Mercury debuggers.
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**
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** Author: zs.
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*/
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#include "mercury_imp.h"
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#include "mercury_trace_util.h"
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#include "mercury_file.h"
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#include "string.mh"
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#include <ctype.h>
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void
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MR_c_file_to_mercury_file(FILE *c_file, MercuryFile *mercury_file)
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{
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MR_mercuryfile_init(c_file, 1, mercury_file);
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}
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MR_bool
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MR_trace_is_natural_number(const char *word, int *value)
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{
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if (MR_isdigit(*word)) {
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*value = *word - '0';
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word++;
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while (MR_isdigit(*word)) {
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*value = (*value * 10) + *word - '0';
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word++;
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}
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if (*word == '\0') {
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return MR_TRUE;
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}
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}
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return MR_FALSE;
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}
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MR_bool
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MR_trace_is_integer(const char *word, MR_Integer *value)
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{
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int sign;
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if (*word == '-') {
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sign = -1;
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word++;
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} else {
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sign = 1;
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}
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if (MR_isdigit(*word)) {
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*value = *word - '0';
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word++;
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while (MR_isdigit(*word)) {
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*value = (*value * 10) + *word - '0';
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word++;
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}
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if (*word == '\0') {
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*value = *value * sign;
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return MR_TRUE;
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}
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}
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return MR_FALSE;
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}
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MR_bool
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MR_trace_is_float(const char *word, MR_Float *value)
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{
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return ML_string_to_float((MR_String) word, value);
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}
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void
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MR_print_stack_regs(FILE *fp, MR_Word *saved_regs)
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{
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#ifndef MR_HIGHLEVEL_CODE
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fprintf(fp, "sp = ");
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MR_print_detstackptr(fp, MR_saved_sp(saved_regs));
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fprintf(fp, "\ncurfr = ");
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MR_print_nondstackptr(fp, MR_saved_curfr(saved_regs));
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fprintf(fp, "\nmaxfr = ");
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MR_print_nondstackptr(fp, MR_saved_maxfr(saved_regs));
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fprintf(fp, "\n");
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#endif
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}
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void
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MR_print_heap_regs(FILE *fp, MR_Word *saved_regs)
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{
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#ifndef MR_CONSERVATIVE_GC
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fprintf(fp, "hp = ");
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MR_print_heapptr(fp, MR_saved_hp(saved_regs));
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fprintf(fp, "\nsol_hp = ");
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MR_print_heapptr(fp, MR_saved_sol_hp(saved_regs));
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fprintf(fp, "\nmin_hp_rec = ");
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MR_print_heapptr(fp, MR_saved_min_hp_rec(saved_regs));
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fprintf(fp, "\nglobal_hp = ");
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MR_print_heapptr(fp, MR_saved_global_hp(saved_regs));
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fprintf(fp, "\n");
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#endif
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}
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void
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MR_print_tabling_regs(FILE *fp, MR_Word *saved_regs)
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{
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#ifdef MR_USE_MINIMAL_MODEL
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fprintf(fp, "gen_next = %ld\n", (long) MR_saved_gen_next(saved_regs));
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fprintf(fp, "cut_next = %ld\n", (long) MR_saved_cut_next(saved_regs));
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#endif
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}
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void
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MR_print_succip_reg(FILE *fp, MR_Word *saved_regs)
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{
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#ifndef MR_HIGHLEVEL_CODE
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fprintf(fp, "succip = ");
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MR_print_label(fp, MR_saved_succip(saved_regs));
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fprintf(fp, "\n");
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#endif
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}
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void
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MR_print_r_regs(FILE *fp, MR_Word *saved_regs)
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{
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#ifndef MR_HIGHLEVEL_CODE
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fprintf(fp, "r1 = %ld (%lx)\n",
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(long) MR_saved_reg(saved_regs, 1),
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(long) MR_saved_reg(saved_regs, 1));
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fprintf(fp, "r2 = %ld (%lx)\n",
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(long) MR_saved_reg(saved_regs, 2),
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(long) MR_saved_reg(saved_regs, 2));
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fprintf(fp, "r3 = %ld (%lx)\n",
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(long) MR_saved_reg(saved_regs, 3),
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(long) MR_saved_reg(saved_regs, 3));
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fprintf(fp, "r4 = %ld (%lx)\n",
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(long) MR_saved_reg(saved_regs, 4),
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(long) MR_saved_reg(saved_regs, 4));
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fprintf(fp, "r5 = %ld (%lx)\n",
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(long) MR_saved_reg(saved_regs, 5),
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(long) MR_saved_reg(saved_regs, 5));
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#endif
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}
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