String handling Page 433
Page 433
UM017105-0511
Standard Header Files
Zilog Developer Studio II – ZNEO™
User Manual
405
Integer Arithmetic
String Handling
The <
string.h
> header declares several functions useful for manipulating character
arrays and other objects treated as character arrays. Various methods are used for deter-
mining the lengths of arrays, but in all cases a char* or void* argument points to the initial
(lowest addressed) character of the array. If an array is written beyond the end of an object,
the behavior is undefined.
Type
Macro
Functions
Copying
int abs(int j);
Finds absolute value of integer value.
div_t div(int numer, int denom);
Computes integer quotient and remainder.
long int labs(long int j);
Finds absolute value of long integer value.
ldiv_t ldiv(long int numer, long int denom);
Computes long quotient and remainder.
size_t
Unsigned integral type of the result of the sizeof operator.
NULL
Expands to a null pointer constant.
void *memcpy(void *s1, const void *s2, size_t n);
Copies a specified number of char-
acters from one buffer to another.
void *memmove(void *s1, const void *s2, size_t n); Moves a specified number of charac-
ters from one buffer to another.
char *strcpy(char *s1, const char *s2);
Copies one string to another.
char *strncpy(char *s1, const char *s2, size_t n);
Copies n characters of one string to
another.