OpenSystemsDevelopment / qpdf

Commit 6d81f014764e3bb9452d3697b84093bed0668f02

Authored by Jay Berkenbilt
1 parent 8c34d67b

Don't assume char is signed in int conversion tests (fixes #361)

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Showing 4 changed files with 21 additions and 5 deletions
ChangeLog
  View file @6d81f01
  1 +2019-09-17 Jay Berkenbilt <ejb@ql.org>
  2 +
  3 + * QIntC tests: don't assume char is signed. Fixes #361.
  4 +
1 5 2019-08-31 Jay Berkenbilt <ejb@ql.org>
2 6  
3 7 * 9.0.0: release
... ...
include/qpdf/QIntC.hh
  View file @6d81f01
... ... @@ -51,6 +51,13 @@ namespace QIntC // QIntC = qpdf Integer Conversion
51 51 };
52 52  
53 53 template <>
  54 + class to_u<signed char>
  55 + {
  56 + public:
  57 + typedef unsigned char type;
  58 + };
  59 +
  60 + template <>
54 61 class to_u<short>
55 62 {
56 63 public:
... ...
libtests/qintc.cc
  View file @6d81f01
... ... @@ -32,12 +32,13 @@ int main()
32 32 uint64_t ul1 = 1099511627776LL; // Too big for 32-bit
33 33 uint64_t ul2 = 12345; // Fits into 32-bit
34 34 int32_t i2 = 81; // Fits in char and uchar
35   - char c1 = '\xf7'; // Signed value when char
  35 + signed char c1 = static_cast<signed char>('\xf7'); // Signed value when char
  36 + char c2 = 'W'; // char; may be signed or unsigned
36 37  
37 38 // Verify i1 and u1 have same bit pattern
38 39 assert(static_cast<uint32_t>(i1) == u1);
39   - // Verify that we can unsafely convert between char and unsigned char
40   - assert(c1 == static_cast<char>(static_cast<unsigned char>(c1)));
  40 + // Verify that we can unsafely convert between signed and unsigned char
  41 + assert(c1 == static_cast<signed char>(static_cast<unsigned char>(c1)));
41 42  
42 43 try_convert(true, QIntC::to_int<int32_t>, i1);
43 44 try_convert(true, QIntC::to_uint<uint32_t>, u1);
... ... @@ -51,7 +52,9 @@ int main()
51 52 try_convert(false, QIntC::to_ulonglong<int32_t>, i1);
52 53 try_convert(true, QIntC::to_char<int32_t>, i2);
53 54 try_convert(true, QIntC::to_uchar<int32_t>, i2);
54   - try_convert(false, QIntC::to_uchar<char>, c1);
  55 + try_convert(false, QIntC::to_uchar<signed char>, c1);
  56 + try_convert(true, QIntC::to_uchar<char>, c2);
  57 + try_convert(true, QIntC::to_char<char>, c2);
55 58  
56 59 return 0;
57 60 }
... ...
libtests/qtest/qintc/qintc.out
  View file @6d81f01
... ... @@ -10,4 +10,6 @@ QIntC::to_offset&lt;int32_t&gt;(i1): -1153374643 -1153374643 PASSED
10 10 QIntC::to_ulonglong<int32_t>(i1): integer out of range converting -1153374643 from a 4-byte signed type to a 8-byte unsigned type PASSED
11 11 QIntC::to_char<int32_t>(i2): 81 Q PASSED
12 12 QIntC::to_uchar<int32_t>(i2): 81 Q PASSED
13   -QIntC::to_uchar<char>(c1): integer out of range converting ÷ from a 1-byte signed type to a 1-byte unsigned type PASSED
  13 +QIntC::to_uchar<signed char>(c1): integer out of range converting ÷ from a 1-byte signed type to a 1-byte unsigned type PASSED
  14 +QIntC::to_uchar<char>(c2): W W PASSED
  15 +QIntC::to_char<char>(c2): W W PASSED
... ...