[HP aCC 6.16] Forming out of bound address in charmap.cpp

• Key: STDCXX-753
• Type: Sub-task
• Status: Resolved
• Resolution: Fixed
• Priority: Major
• Assignee: Martin Sebor
• Reporter: Scott (Yu) Zhong
• Component/s: 20. General Utilities
• Affects Version/s: 4.2.0
• Fix Version/s: 4.2.1

Environment

$ uname -sr && aCC -V
HP-UX B.11.31
aCC: HP C/aC++ B3910B A.06.16 [Nov 26 2007]

Description

aCC -c -mt -I/amd/devco/scottz/stdcxx/4.2.x/include -I/build/scottz/12d/include -AA +O2 +DD64 +w +W392 +W655 +W684 +W818 +W819 +W849 +W2193
+W2236 +W2261 +W2340 +W2401 +W2487 +W4227 +W4229 +W4231 +W4235 +W4237 +W4249 +W4255 +W4272 +W4284 +W4285 +W4286 /amd/devco/scottz/stdcxx/4.2.x/u
til/charmap.cpp

"/amd/devco/scottz/stdcxx/4.2.x/util/charmap.cpp", line 222, procedure convert_to_ucs: warning #20208-D: Forming out of bound address (In expression "(const unsigned char*)utf8_enc+num_bytes+-1", variable "utf8_enc" [/amd/devco/scottz/stdcxx/4.2.x/util/charmap.cpp:674] (type: char [5]) has byte range [0 .. 4], forming address byte range [-1 .. 5].)

Comments

[Scott (Yu) Zhong]

add compile line to description

[Martin Sebor]

This actually indicates at least a theoretical problem with the utility: the size of the destination buffer used for the conversion to UTF-8 is MB_LEN_MAX + 1 bytes. On HP-UX, the value of MB_LEN_MAX is 4, which is 2 less than the longest UTF-8 character the utility could otherwise process.

[Martin Sebor]

Warning silenced in r650678.