sh_classify.h

Go to the documentation of this file.

#pragma once
 
#include <stddef.h>
#include <stdint.h>
#include <string.h>

typedef enum : uint8_t {
  k_sh_fmt_rabook = 0U, 
  k_sh_fmt_epub   = 1U, 
  k_sh_fmt_cbz    = 2U, 
  k_sh_fmt_cbr    = 3U, 
  k_sh_fmt_cbt    = 4U, 
} sh_book_fmt_t;

static inline bool sh_fmt_is_comic(sh_book_fmt_t fmt)
{
  return (fmt == k_sh_fmt_cbz) || (fmt == k_sh_fmt_cbr) || (fmt == k_sh_fmt_cbt);
}

static inline char sh_ascii_lower(char c)
{
  return ((c >= 'A') && (c <= 'Z')) ? (char)(c + ('a' - 'A')) : c;
}

static inline bool sh_ext_match(const char* name, const char* ext)
{
  const size_t n = strlen(name);
  const size_t e = strlen(ext);
  if (n <= e) {
    return false;
  }
  for (size_t i = 0U; i < e; ++i) {
    if (sh_ascii_lower(name[n - e + i]) != sh_ascii_lower(ext[i])) {
      return false;
    }
  }
  return true;
}

static inline bool sh_book_classify(const char* name, sh_book_fmt_t* out_fmt)
{
  if (sh_ext_match(name, ".rabook") || sh_ext_match(name, ".rbk")) {
    *out_fmt = k_sh_fmt_rabook;
    return true;
  }
  if (sh_ext_match(name, ".epub") || sh_ext_match(name, ".epb")) {
    *out_fmt = k_sh_fmt_epub;
    return true;
  }
  if (sh_ext_match(name, ".cbz")) {
    *out_fmt = k_sh_fmt_cbz;
    return true;
  }
  if (sh_ext_match(name, ".cbr")) {
    *out_fmt = k_sh_fmt_cbr;
    return true;
  }
  if (sh_ext_match(name, ".cbt")) {
    *out_fmt = k_sh_fmt_cbt;
    return true;
  }
  return false;
}