iswblank Function

Test for a space or tab wide character.

Attention: This function is implemented only by MPLAB XC32 C compilers.




int iswblank(wint_t wc);


The wide character to test.

Return Value

Returns a non-zero integer value if the wide character, wc, is a space or tab wide character; otherwise, returns a zero.


A wide character is considered to be a white-space wide character if it is one of the following: space (L' ') or horizontal tab (L'\t').


See the notes at the beginning of this chapter or section for information on using printf() or scanf() (and other functions reading and writing the stdin or stdout streams) in the example code.

#include <wctype.h>
#include <stdio.h>
#include <stdbool.h>

int main(void)
  wint_t wStr[] = L"A string, 2 wide 4 some.\n";
  wint_t wc;
  unsigned idx = 0;
  bool found = false;

  do {
    wc = wStr[idx];
    if(iswblank(wc)) {
      if( ! found)
        printf("Found matching wide char at position: ");
      printf("%s%u", found ? ", " : "", idx);
      found = true;
  } while(wStr[idx]);

Example Output

Found matching wide char at position: 1, 9, 11, 16, 18