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authorUlrich Drepper <drepper@redhat.com>2006-12-10 01:11:45 +0000
committerUlrich Drepper <drepper@redhat.com>2006-12-10 01:11:45 +0000
commit2282c90c4298988b61d2487549167c39d76ec7bc (patch)
tree9b626e8bddc6858fd19f589d3c3762f70e7cd225 /stdlib
parentd117c1ce4df93249471a63a4d6baad0bcbc5a988 (diff)
[BZ #3673]
* stdlib/strtod_l.c (____STRTOF_INTERNAL): Fix exp_limit computation. * stdlib/Makefile (tests): Add tst-atof2. * stdlib/tst-atof2.c: New file. * stdlib/Makefile (tests): Add tst-atof1. * stdlib/tst-atof1.c: New file.
Diffstat (limited to 'stdlib')
-rw-r--r--stdlib/Makefile3
-rw-r--r--stdlib/strtod_l.c16
-rw-r--r--stdlib/tst-atof2.c55
3 files changed, 66 insertions, 8 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index a0ff427b7e..5387475400 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -66,7 +66,8 @@ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
test-canon test-canon2 tst-strtoll tst-environ \
tst-xpg-basename tst-random tst-random2 tst-bsearch \
tst-limits tst-rand48 bug-strtod tst-setcontext \
- test-a64l tst-qsort tst-system testmb2 bug-strtod2
+ test-a64l tst-qsort tst-system testmb2 bug-strtod2 \
+ tst-atof1 tst-atof2
include ../Makeconfig
diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c
index b9c2769224..6f7e62fbb8 100644
--- a/stdlib/strtod_l.c
+++ b/stdlib/strtod_l.c
@@ -759,13 +759,15 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
}
}
- /* We have the number digits in the integer part. Whether these are all or
- any is really a fractional digit will be decided later. */
+ /* We have the number of digits in the integer part. Whether these
+ are all or any is really a fractional digit will be decided
+ later. */
int_no = dig_no;
lead_zero = int_no == 0 ? -1 : 0;
- /* Read the fractional digits. A special case are the 'american style'
- numbers like `16.' i.e. with decimal but without trailing digits. */
+ /* Read the fractional digits. A special case are the 'american
+ style' numbers like `16.' i.e. with decimal point but without
+ trailing digits. */
if (
#ifdef USE_WIDE_CHAR
c == (wint_t) decimal
@@ -815,15 +817,16 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
if (base == 16)
exp_limit = (exp_negative ?
-MIN_EXP + MANT_DIG + 4 * int_no :
- MAX_EXP - 4 * int_no + lead_zero);
+ MAX_EXP - 4 * int_no + 4 * lead_zero + 3);
else
exp_limit = (exp_negative ?
-MIN_10_EXP + MANT_DIG + int_no :
- MAX_10_EXP - int_no + lead_zero);
+ MAX_10_EXP - int_no + lead_zero + 1);
do
{
exponent *= 10;
+ exponent += c - L_('0');
if (exponent > exp_limit)
/* The exponent is too large/small to represent a valid
@@ -853,7 +856,6 @@ ____STRTOF_INTERNAL (nptr, endptr, group, loc)
/* NOTREACHED */
}
- exponent += c - L_('0');
c = *++cp;
}
while (c >= L_('0') && c <= L_('9'));
diff --git a/stdlib/tst-atof2.c b/stdlib/tst-atof2.c
new file mode 100644
index 0000000000..74dac87b0d
--- /dev/null
+++ b/stdlib/tst-atof2.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static const struct
+{
+ const char *str;
+ const char *expected;
+} tests[] =
+ {
+ { "1e308", "1e+308" },
+ { "100000000e300", "1e+308" },
+ { "0x1p1023", "8.98847e+307" },
+ { "0x1000p1011", "8.98847e+307" },
+ { "0x1p1020", "1.12356e+307" },
+ { "0x0.00001p1040", "1.12356e+307" },
+ { "1e-307", "1e-307" },
+ { "0.000001e-301", "1e-307" },
+ { "0.0000001e-300", "1e-307" },
+ { "0.00000001e-299", "1e-307" },
+ { "1000000e-313", "1e-307" },
+ { "10000000e-314", "1e-307" },
+ { "100000000e-315", "1e-307" },
+ { "0x1p-1021", "4.45015e-308" },
+ { "0x1000p-1033", "4.45015e-308" },
+ { "0x10000p-1037", "4.45015e-308" },
+ { "0x0.001p-1009", "4.45015e-308" },
+ { "0x0.0001p-1005", "4.45015e-308" },
+ };
+#define NTESTS (sizeof (tests) / sizeof (tests[0]))
+
+
+static int
+do_test (void)
+{
+ int status = 0;
+
+ for (int i = 0; i < NTESTS; ++i)
+ {
+ char buf[100];
+ snprintf (buf, sizeof (buf), "%g", atof (tests[i].str));
+ if (strcmp (buf, tests[i].expected) != 0)
+ {
+ printf ("%d: got \"%s\", expected \"%s\"\n",
+ i, buf, tests[i].expected);
+ status = 1;
+ }
+ }
+
+ return status;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"