Supported C Functions

You can use ANSI C functions that do not use the Windows operating system in your custom blocks or I/O drivers. The following includes a partial list of supported functions:

• Data conversion — abs, atof, atoi, atol, itoa, labs, ltoa, strtod, strtol, strtoul, ultoa

• Memory allocation — calloc, free, malloc

  Note   Memory allocation is not an operation that can be done in real time. To work with a Real-Time Windows Target application, memory management must occur before real-time simulation begins. Simulation switches into real-time after mdlStart, so you can allocate memory in mdlInitializeSizes or mdlStart. You cannot allocate memory in any function after mdlStart, such as mdlOutputs or mdlUpdate.

• Memory manipulation — _memccpy, memcpy, memchr, memcmp, _memicmp, memmove, memset

• String manipulation — strcat, strchr, strcmp, strcpy, strcspn, _strdup, _stricmp, strlen, _strlwr, strncat, strncmp, strncpy, _strnset, strpbrk, strrchr, _strrev, _strset, strspn, strstr, strtok, strupr

• Mathematical — acos, asin, atan, atan2, ceil, cos, cosh, div, exp, fabs, floor, fmod, frexp, ldexp, ldiv, log, log10, max, min, modf, pow, rand, sin, sinh, sqrt, srand, tan, tanh, uldiv

• Character class tests and conversion — isalnum, isalpha, _isascii, iscntrl, isdigit, isgraph, islower, isprint, ispunct, isspace, isupper, isxdigit, isxupper, isxlower, _toascii, tolower, toupper

• Searching and sorting — bsearch, qsort

• Dummy functions — exit, fprintf, prinf

Unsupported C Functions

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS