74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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/**
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* Compatibility / portability funcitons and constants for the MicroBit DAL.
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*/
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#ifndef MICROBIT_COMPAT_H
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#define MICROBIT_COMPAT_H
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#define PI 3.14159265359
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/*! \
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\brief Utility functions.
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Included here often to reduce the need to import a whole library for simple opertations.
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This helps to minimize our SRAM footprint.
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*/
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/*!
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\brief returns the smallest of the two numbers
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\param a the first number
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\param b the number to compare against a
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\return whichever value is the smallest
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*/
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inline int min(int a, int b)
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{
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return (a < b ? a : b);
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}
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/*!
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\brief returns the biggest of the two numbers
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\param a the first number
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\param b the number to compare against a
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\return whichever value is the biggest
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*/
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inline int max(int a, int b)
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{
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return (a > b ? a : b);
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}
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/*!
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\brief clears b number of bytes given the pointer a
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\param a the pointer to the beginning of the memory to clear
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\param b the number of bytes to clear.
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*/
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inline void *memclr(void *a, size_t b)
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{
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return memset(a,0,b);
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}
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/*!
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\brief returns true if the character c lies between ascii values 48 and 57 inclusive.
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\param c the character to check
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\return a bool, true if it is a digit, false otherwise
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*/
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inline bool isdigit(char c)
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{
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return (c > 47 && c < 58);
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}
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/*!
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\brief Performs an in buffer reverse of a given char array
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\param s the char* to reverse.
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\return the reversed char*
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*/
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void string_reverse(char *s);
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/*!
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\briefConverts a given integer into a base 10 ASCII equivalent.
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\param n The number to convert.
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\param s Pointer to a buffer in which to store the resulting string.
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*/
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void itoa(int n, char *s);
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#endif
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