Texas Instruments TMS320C2x, User Manual

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Header Files
7-6
7.2.3 Error Reporting (errno.h)
Errors can occur in a math function if invalid parameter values are passed to
the function or if the function returns a result that is outside the defined range
for the type of the result. When this happens, a variable named
errno is set to
the value of one of the following macros:
-
EDOM, for domain errors (invalid parameter)
-
ERANGE, for range errors (invalid result)
C code that calls a math function can read the value of errno to check for error
conditions. The errno variable is declared in errno.h and defined in errno.c.
7.2.4 Limits (float.h and limits.h)
The float.h and limits.h headers define macros that expand to useful limits and
parameters of the TMS320C2x/C2xx/C5x’s numeric representations.
Table 7
− 1 and Table 7 − 2 list these macros and their limits.
Table 7 − 1. Macros That Supply Integer Type Range Limits ( limits.h )
Macro Value Description
CHAR_BIT 16 Maximum number of bits for the smallest
object that is not a bit field
SCHAR_MIN − 32768 Minimum value for a signed char
SCHAR_MAX 32767 Maximum value for a signed char
UCHAR_MAX 65535 Maximum value for an unsigned char
CHAR_MIN SCHAR_MIN Minimum value for a char
CHAR_MAX SCHAR_MAX Maximum value for a char
SHRT_MIN − 32768 Minimum value for a short int
SHRT_MAX 32767 Maximum value for a short int
USHRT_MAX 65535 Maximum value for an unsigned short int
INT_MIN − 32768 Minimum value for an int
INT_MAX 32767 Maximum value for an int
UINT_MAX 65535 Maximum value for an unsigned int
LONG_MIN − 2147483648 Minimum value for a long int
LONG_MAX 2147483647 Maximum value for a long int
ULONG_MAX 4294967295 Maximum value for an unsigned long int