diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/include/fxcrt/fx_string.h | 12 | ||||
| -rw-r--r-- | core/src/fxcrt/fx_basic_bstring.cpp | 2 | ||||
| -rw-r--r-- | core/src/fxcrt/fx_basic_bstring_unittest.cpp | 180 |
3 files changed, 177 insertions, 17 deletions
diff --git a/core/include/fxcrt/fx_string.h b/core/include/fxcrt/fx_string.h index 524d7efde5..eae1c15a04 100644 --- a/core/include/fxcrt/fx_string.h +++ b/core/include/fxcrt/fx_string.h @@ -15,6 +15,9 @@ class CFX_BinaryBuf; typedef int FX_STRSIZE; class CFX_ByteStringL; class CFX_WideStringL; + +// An immutable string with caller-provided storage which must outlive the +// string itself. class CFX_ByteStringC : public CFX_Object { public: @@ -38,6 +41,13 @@ public: m_Length = ptr ? (FX_STRSIZE)FXSYS_strlen(ptr) : 0; } + // |ch| must be an lvalue that outlives the the CFX_ByteStringC. However, + // the use of char rvalues are not caught at compile time. They are + // implicitly promoted to CFX_ByteString (see below) and then the + // CFX_ByteStringC is constructed from the CFX_ByteString via the alternate + // constructor below. The CFX_ByteString then typically goes out of scope + // and |m_Ptr| may be left pointing to invalid memory. Beware. + // TODO(tsepez): Mark single-argument string constructors as explicit. CFX_ByteStringC(FX_CHAR& ch) { m_Ptr = (FX_LPCBYTE)&ch; @@ -65,7 +75,7 @@ public: CFX_ByteStringC& operator = (FX_LPCSTR src) { m_Ptr = (FX_LPCBYTE)src; - m_Length = (FX_STRSIZE)FXSYS_strlen(src); + m_Length = m_Ptr ? (FX_STRSIZE)FXSYS_strlen(src) : 0; return *this; } diff --git a/core/src/fxcrt/fx_basic_bstring.cpp b/core/src/fxcrt/fx_basic_bstring.cpp index c54148d799..0d4f860b32 100644 --- a/core/src/fxcrt/fx_basic_bstring.cpp +++ b/core/src/fxcrt/fx_basic_bstring.cpp @@ -1082,7 +1082,7 @@ FX_DWORD CFX_ByteStringC::GetID(FX_STRSIZE start_pos) const if (m_Length == 0) { return 0; } - if (start_pos >= m_Length) { + if (start_pos < 0 || start_pos >= m_Length) { return 0; } FX_DWORD strid = 0; diff --git a/core/src/fxcrt/fx_basic_bstring_unittest.cpp b/core/src/fxcrt/fx_basic_bstring_unittest.cpp index 138f1bff2c..030b6aea10 100644 --- a/core/src/fxcrt/fx_basic_bstring_unittest.cpp +++ b/core/src/fxcrt/fx_basic_bstring_unittest.cpp @@ -13,30 +13,180 @@ TEST(fxcrt, ByteStringCNull) { EXPECT_TRUE(null_string.IsEmpty()); CFX_ByteStringC another_null_string; - EXPECT_TRUE(null_string == another_null_string); + EXPECT_EQ(null_string, another_null_string); - CFX_ByteString copied_null_string(null_string); - EXPECT_EQ(null_string.GetPtr(), nullptr); - EXPECT_EQ(null_string.GetLength(), 0); - EXPECT_TRUE(null_string.IsEmpty()); - EXPECT_TRUE(null_string == another_null_string); + CFX_ByteStringC copied_null_string(null_string); + EXPECT_EQ(copied_null_string.GetPtr(), nullptr); + EXPECT_EQ(copied_null_string.GetLength(), 0); + EXPECT_TRUE(copied_null_string.IsEmpty()); + EXPECT_EQ(null_string, copied_null_string); - CFX_ByteStringC empty_string(""); - EXPECT_EQ(null_string.GetPtr(), nullptr); - EXPECT_EQ(null_string.GetLength(), 0); - EXPECT_TRUE(null_string.IsEmpty()); - EXPECT_TRUE(null_string == empty_string); + CFX_ByteStringC empty_string(""); // Pointer to NUL, not NULL pointer. + EXPECT_NE(empty_string.GetPtr(), nullptr); + EXPECT_EQ(empty_string.GetLength(), 0); + EXPECT_TRUE(empty_string.IsEmpty()); + EXPECT_EQ(null_string, empty_string); + + CFX_ByteStringC assigned_null_string("initially not NULL"); + assigned_null_string = null_string; + EXPECT_EQ(assigned_null_string.GetPtr(), nullptr); + EXPECT_EQ(assigned_null_string.GetLength(), 0); + EXPECT_TRUE(assigned_null_string.IsEmpty()); + EXPECT_EQ(null_string, assigned_null_string); + + CFX_ByteStringC assigned_nullptr_string("initially not NULL"); + assigned_nullptr_string = (FX_LPCSTR)nullptr; + EXPECT_EQ(assigned_nullptr_string.GetPtr(), nullptr); + EXPECT_EQ(assigned_nullptr_string.GetLength(), 0); + EXPECT_TRUE(assigned_nullptr_string.IsEmpty()); + EXPECT_EQ(null_string, assigned_nullptr_string); CFX_ByteStringC non_null_string("a"); - EXPECT_FALSE(null_string == non_null_string); + EXPECT_NE(null_string, non_null_string); +} + +TEST(fxcrt, ByteStringCNotNull) { + CFX_ByteStringC string3("abc"); + CFX_ByteStringC string6("abcdef"); + CFX_ByteStringC alternate_string3("abcdef", 3); + CFX_ByteStringC embedded_nul_string7("abc\0def", 7); + CFX_ByteStringC illegal_string7("abcdef", 7); + + EXPECT_EQ(3, string3.GetLength()); + EXPECT_EQ(6, string6.GetLength()); + EXPECT_EQ(3, alternate_string3.GetLength()); + EXPECT_EQ(7, embedded_nul_string7.GetLength()); + EXPECT_EQ(7, illegal_string7.GetLength()); + + EXPECT_NE(string3, string6); + EXPECT_EQ(string3, alternate_string3); + EXPECT_NE(string3, embedded_nul_string7); + EXPECT_NE(string3, illegal_string7); + EXPECT_NE(string6, alternate_string3); + EXPECT_NE(string6, embedded_nul_string7); + EXPECT_NE(string6, illegal_string7); + EXPECT_NE(alternate_string3, embedded_nul_string7); + EXPECT_NE(alternate_string3, illegal_string7); + EXPECT_NE(embedded_nul_string7, illegal_string7); + + CFX_ByteStringC copied_string3(string3); + CFX_ByteStringC copied_alternate_string3(alternate_string3); + CFX_ByteStringC copied_embedded_nul_string7(embedded_nul_string7); + + EXPECT_EQ(string3, copied_string3); + EXPECT_EQ(alternate_string3, copied_alternate_string3); + EXPECT_EQ(embedded_nul_string7, copied_embedded_nul_string7); + + CFX_ByteStringC assigned_string3("intially something else"); + CFX_ByteStringC assigned_alternate_string3("initally something else"); + CFX_ByteStringC assigned_ptr_string3("initially something else"); + CFX_ByteStringC assigned_embedded_nul_string7("initially something else"); + + assigned_string3 = string3; + assigned_alternate_string3 = alternate_string3; + assigned_ptr_string3 = "abc"; + assigned_embedded_nul_string7 = embedded_nul_string7; + EXPECT_EQ(string3, assigned_string3); + EXPECT_EQ(alternate_string3, assigned_alternate_string3); + EXPECT_EQ(alternate_string3, assigned_ptr_string3); + EXPECT_EQ(embedded_nul_string7, assigned_embedded_nul_string7); +} + +TEST(fxcrt, ByteStringCFromChar) { + CFX_ByteStringC null_string; + CFX_ByteStringC lower_a_string("a"); + + // Must have lvalues that outlive the corresponding ByteStringC. + char nul = '\0'; + char lower_a = 'a'; + CFX_ByteStringC nul_string_from_char(nul); + CFX_ByteStringC lower_a_string_from_char(lower_a); + + // Pointer to nul, not NULL ptr, hence length 1 ... + EXPECT_EQ(1, nul_string_from_char.GetLength()); + EXPECT_NE(null_string, nul_string_from_char); - // TODO(tsepez): fix assignment of a null ptr to a CFX_ByteStringC. + EXPECT_EQ(1, lower_a_string_from_char.GetLength()); + EXPECT_EQ(lower_a_string, lower_a_string_from_char); + EXPECT_NE(nul_string_from_char, lower_a_string_from_char); + + CFX_ByteStringC longer_string("ab"); + EXPECT_NE(longer_string, lower_a_string_from_char); } TEST(fxcrt, ByteStringCGetID) { CFX_ByteStringC null_string; - EXPECT_EQ(null_string.GetID(), 0u); + EXPECT_EQ(0u, null_string.GetID()); + EXPECT_EQ(0u, null_string.GetID(1)); + EXPECT_EQ(0u, null_string.GetID(-1)); + EXPECT_EQ(0u, null_string.GetID(-1000000)); CFX_ByteStringC empty_string(""); - EXPECT_EQ(empty_string.GetID(), 0u); + EXPECT_EQ(0u, empty_string.GetID()); + EXPECT_EQ(0u, empty_string.GetID(1)); + EXPECT_EQ(0u, empty_string.GetID(-1)); + EXPECT_EQ(0u, empty_string.GetID(-1000000)); + + CFX_ByteStringC short_string("ab"); + EXPECT_EQ(FXBSTR_ID('a', 'b', 0, 0), short_string.GetID()); + EXPECT_EQ(FXBSTR_ID('b', 0, 0, 0), short_string.GetID(1)); + EXPECT_EQ(0u, short_string.GetID(2)); + EXPECT_EQ(0u, short_string.GetID(-1)); + EXPECT_EQ(0u, short_string.GetID(-1000000)); + + CFX_ByteStringC longer_string("abcdef"); + EXPECT_EQ(FXBSTR_ID('a', 'b', 'c', 'd'), longer_string.GetID()); + EXPECT_EQ(FXBSTR_ID('b', 'c', 'd', 'e'), longer_string.GetID(1)); + EXPECT_EQ(FXBSTR_ID('c', 'd', 'e', 'f'), longer_string.GetID(2)); + EXPECT_EQ(FXBSTR_ID('d', 'e', 'f', 0), longer_string.GetID(3)); + EXPECT_EQ(FXBSTR_ID('e', 'f', 0 , 0), longer_string.GetID(4)); + EXPECT_EQ(FXBSTR_ID('f', 0 , 0, 0), longer_string.GetID(5)); + EXPECT_EQ(0u, longer_string.GetID(6)); + EXPECT_EQ(0u, longer_string.GetID(-1)); + EXPECT_EQ(0u, longer_string.GetID(-1000000)); +} + +TEST(fxcrt, ByteStringCMid) { + CFX_ByteStringC null_string; + EXPECT_EQ(null_string, null_string.Mid(0, 1)); + EXPECT_EQ(null_string, null_string.Mid(1, 1)); + + CFX_ByteStringC empty_string(""); + EXPECT_EQ(empty_string, empty_string.Mid(0, 1)); + EXPECT_EQ(empty_string, empty_string.Mid(1, 1)); + + CFX_ByteStringC single_character("a"); + EXPECT_EQ(empty_string, single_character.Mid(0, 0)); + EXPECT_EQ(single_character, single_character.Mid(0, 1)); + EXPECT_EQ(empty_string, single_character.Mid(1, 0)); + EXPECT_EQ(empty_string, single_character.Mid(1, 1)); + + CFX_ByteStringC longer_string("abcdef"); + EXPECT_EQ(longer_string, longer_string.Mid(0, 6)); + EXPECT_EQ(longer_string, longer_string.Mid(0, 187)); + EXPECT_EQ(longer_string, longer_string.Mid(-42, 6)); + EXPECT_EQ(longer_string, longer_string.Mid(-42, 187)); + + CFX_ByteStringC leading_substring("ab"); + EXPECT_EQ(leading_substring, longer_string.Mid(0, 2)); + EXPECT_EQ(leading_substring, longer_string.Mid(-1, 2)); + + CFX_ByteStringC middle_substring("bcde"); + EXPECT_EQ(middle_substring, longer_string.Mid(1, 4)); + + CFX_ByteStringC trailing_substring("ef"); + EXPECT_EQ(trailing_substring, longer_string.Mid(4, 2)); + EXPECT_EQ(trailing_substring, longer_string.Mid(4, 3)); +} + +TEST(fxcrt, ByteStringCGetAt) { + CFX_ByteString short_string("a"); + CFX_ByteString longer_string("abc"); + CFX_ByteString embedded_nul_string("ab\0c", 4); + + EXPECT_EQ('a', short_string.GetAt(0)); + EXPECT_EQ('c', longer_string.GetAt(2)); + EXPECT_EQ('b', embedded_nul_string.GetAt(1)); + EXPECT_EQ('\0', embedded_nul_string.GetAt(2)); + EXPECT_EQ('c', embedded_nul_string.GetAt(3)); } |