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Remove abs calls and pick correct floating point epsilon values (fixes #641)

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This commit is contained in:
Jay Berkenbilt 2022-02-11 07:17:51 -05:00
parent 4ff837f099
commit 956a272d62
3 changed files with 9 additions and 4 deletions
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5
README-maintainer
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@ -98,6 +98,11 @@ CODING RULES
* Avoid atoi. Use QUtil::string_to_int instead. It does
overflow/underflow checking.
* Avoid certain functions that tend to be macros or create compilation
errors on some platforms. Known cases: strcasecmp, abs. Avoid min
and max. If needed, std::min and std::max are okay to use in C++
code with <algorithm> included.
* Remember to avoid using `operator[]` with `std::string` or
`std::vector`. Instead, use `at()`. See README-hardening.md for
details.

2
qpdf/qpdf-ctest.c
View File

@ -714,7 +714,7 @@ static void test25(char const* infile,
double d = 0.0;
assert(qpdf_oh_get_value_as_number(qpdf, p_bool, &d) == QPDF_FALSE);
assert((qpdf_oh_get_value_as_number(qpdf, p_int, &d) == QPDF_TRUE) &&
(((d - 1.0) * (d - 1.0)) < 1e-100));
((d - 1.0) < 1e-6) && ((d - 1.0) > -1e-6));
assert(qpdf_oh_get_type_code(qpdf, p_int) == ot_integer);
assert(strcmp(qpdf_oh_get_type_name(qpdf, p_int), "integer") == 0);
assert(qpdf_oh_is_real(qpdf, p_real) &&

6
qpdf/test_driver.cc
View File

@ -3293,11 +3293,11 @@ static void test_85(QPDF& pdf, char const* arg2)
assert(s == "42.0");
double num = 0.0;
assert(oh_i.getValueAsNumber(num));
assert(abs(num - 1.0) < 1e-100);
assert(((num - 1.0) < 1e-6) && (num - 1.0 > -1e-6));
assert(oh_r.getValueAsNumber(num));
assert(abs(num - 42.0) < 1e-100);
assert(((num - 42.0) < 1e-6) && (num - 42.0 > -1e-6));
assert(! oh_b.getValueAsNumber(num));
assert(abs(num - 42.0) < 1e-100);
assert(((num - 42.0) < 1e-6) && (num - 42.0 > -1e-6));
s = "";
assert(oh_n.getValueAsName(s));
assert(s == "/Test") ;