// SPDX-License-Identifier: MIT
// Author: Giovanni Santini
// Github: @San7o

// Get number of separator charactes from the left of string
//
// Get the number of separator characters from the left of [input]
// until the first non-separator or [input_size]. Separator characters
// are specs, new lines and tabs. Updates [line] and/or [column] if
// non null.
int left_space(const char* input, int input_size,
               unsigned int* line, unsigned int* column)
{
  if (!input || input_size == 0) return 0;

  int pos = 0;
  while(pos < input_size &&
        (input[pos] == ' ' ||
         input[pos] == '\n' ||
         input[pos] == '\t'))
  {
    if (input[pos] == '\n') {
      if (line) (*line)++;
      if (column) *column = 0;
    } else {
      if (column) (*column)++;
    }
    pos++;
  }

  return pos;
}