[]Use braces {} for conditional statements.
[]Do not abbreviate variable names.
[]Limit use of goto for one section of code.
[]Use const for variables that should not be modified.
[]operators need a space before and after. ex) if while switch return + - 
[]indentations are 4 spaces, do not use tab character (0x09)
[]blank line before and after each structured block of code such as if, while etc...
[]no non-printing characters such as CR (carriage return)
[]use snake_case for module names, functions, and variables
[]initialize variables before use
[]Do not use comma , operator with variable declarations.
[]Set variables to zero before and after usage. Zeroing after, increases code security.
[]Limit functions to 100 lines
[]Private functions are declared static
[]no variables in header files
[]do not use absolute file paths
[]The names of all new data types, including structures, unions, and enumerations, shall consist only of lowercase characters and internal underscores and end with ‘_t ’
[]Use the C99 type names float32_t , float64_t, and float128_t 
[]Append an ‘f ’ to all single-precision constants (e.g., pi = 3.141592f )
[]many goto statements jump to only one label
[]minimize and avoid use of goto if possible
[]Ensure double precision
#include <limits.h>
#if (DBL_DIG < 10) // Ensure the compiler supports double precision.
# error “Double precision is not available!”
#endif

[]Prevent or stop struct padding
typedef struct
{
uint16_t count; // offset 0
uint16_t max_count; // offset 2
uint16_t _unused; // offset 4
uint16_t enable : 2; // offset 6 bits 15-14
uint16_t b_interrupt : 1; // offset 6 bit 13
uint16_t _unused1 : 7; // offset 6 bits 12-6
uint16_t b_complete : 1; // offset 6 bit 5
uint16_t _unused2 : 4; // offset 6 bits 4-1
uint16_t b_periodic : 1; // offset 6 bit 0
} timer_reg_t;
// Preprocessor check of timer register layout byte count.
#if ((8 != sizeof(timer_reg_t))
# error “timer_reg_t struct size incorrect (expected 8 bytes)”
#endif

[]use type bool for boolean
#include <stdbool.h>
...
bool b_in_motion = (0 != speed_in_mph);

[]Use functions instead of parameterized macros.
[]All functions that encapsulate threads of execution (a.k.a., tasks, processes) shall be given names ending with “_thread ” (or “_task ”, “_process ”).
[]Interrupt Service Routines need special handling. See the Barr Guide.
[]No 'magic numbers'. Replace constants with meaningful variables.

#Other checks not related to BARR C
[]No use after free
[]Memory is managed properly
[]Check for Errors after memory allocation
[]Prevent buffer overflow
[]Prevent integer overflow/underflow