trezor-firmware/legacy/gen/strwidth.c

#include <readline/history.h>
#include <readline/readline.h>
#include <stdio.h>
#include <stdlib.h>

#include "fonts.h"

static inline char convert(char c) {
  if (c < 0x80) {
    return c;
  } else if (c >= 0xC0) {
    return 0x7f;
  } else {
    return '\0';
  }
}

int main(int argc, char **argv) {
  char *line = NULL;
  int font = FONT_STANDARD;
  while ((line = readline(NULL)) != NULL) {
    size_t length = strlen(line);
    if (length) {
      add_history(line);
    }

    size_t width = 0;
    for (size_t i = 0; i < length; i++) {
      width += fontCharWidth(font, convert(line[i])) + 1;
    }

    printf("%zu\n", width);
    free(line);
  }
}