Fail-Safe C: Features

Basic Features

• Almost all core language features of ISO C90 (ISO/IEC 9899:1990, so-called “ANSI-C”) specification
  • Includes full-support for ISO-specified semantics of casts and unions
• Support for many ad-hoc tricks beyond ANSI C specifications, which are common among many C programmers
• Complete protection against memory block over-boundary accesses
  • As safe as Java and C#
• More than 500 standard library functions

Programs not to be supported

• Programs which uses custom memory managements
  • However, some of such programs can be run with Fail-Safe C (with performance degradation)
  • Support for some non-standard memory management libraries may be added
• Low-level, self-standing programs such as OS kernels

Features not yet supported

• True support for long double (degraded to double)
• Threading support
• wide-character support
• “shm” functions
• ISO C99 extensions

Support for those features may be added in future. See status page for more information about implementation bugs/unintended limitations.