コード例 #1
0
ファイル: struct.c プロジェクト: Birdflying1005/h2o
static mrb_value
make_struct(mrb_state *mrb, mrb_value name, mrb_value members, struct RClass * klass)
{
  mrb_value nstr;
  mrb_sym id;
  struct RClass *c;

  if (mrb_nil_p(name)) {
    c = mrb_class_new(mrb, klass);
  }
  else {
    /* old style: should we warn? */
    name = mrb_str_to_str(mrb, name);
    id = mrb_obj_to_sym(mrb, name);
    if (!is_const_id(mrb, mrb_sym2name_len(mrb, id, NULL))) {
      mrb_name_error(mrb, id, "identifier %S needs to be constant", name);
    }
    if (mrb_const_defined_at(mrb, mrb_obj_value(klass), id)) {
      mrb_warn(mrb, "redefining constant Struct::%S", name);
      /* ?rb_mod_remove_const(klass, mrb_sym2name(mrb, id)); */
    }
    c = mrb_define_class_under(mrb, klass, RSTRING_PTR(name), klass);
  }
  MRB_SET_INSTANCE_TT(c, MRB_TT_ARRAY);
  nstr = mrb_obj_value(c);
  mrb_iv_set(mrb, nstr, mrb_intern_lit(mrb, "__members__"), members);

  mrb_define_class_method(mrb, c, "new", mrb_instance_new, MRB_ARGS_ANY());
  mrb_define_class_method(mrb, c, "[]", mrb_instance_new, MRB_ARGS_ANY());
  mrb_define_class_method(mrb, c, "members", mrb_struct_s_members_m, MRB_ARGS_NONE());
  /* RSTRUCT(nstr)->basic.c->super = c->c; */
  make_struct_define_accessors(mrb, members, c);
  return nstr;
}
コード例 #2
0
ファイル: class.c プロジェクト: Kazu-zamasu/mruby_efi_shell
/*!
 * Defines a class under the namespace of \a outer.
 * \param outer  a class which contains the new class.
 * \param id     name of the new class
 * \param super  a class from which the new class will derive.
 *               NULL means \c Object class.
 * \return the created class
 * \throw TypeError if the constant name \a name is already taken but
 *                  the constant is not a \c Class.
 * \throw NameError if the class is already defined but the class can not
 *                  be reopened because its superclass is not \a super.
 * \post top-level constant named \a name refers the returned class.
 *
 * \note if a class named \a name is already defined and its superclass is
 *       \a super, the function just returns the defined class.
 */
struct RClass *
mrb_define_class_under(mrb_state *mrb, struct RClass *outer, const char *name, struct RClass *super)
{
  struct RClass * c;
  mrb_sym id = mrb_intern(mrb, name);

  if (mrb_const_defined_at(mrb, outer, id)) {
    c = mrb_class_from_sym(mrb, outer, id);
    if (c->tt != MRB_TT_CLASS) {
        mrb_raise(mrb, E_TYPE_ERROR, "%s is not a class", mrb_sym2name(mrb, id));
    }
    if (mrb_class_real(c->super) != super) {
        mrb_name_error(mrb, id, "%s is already defined", mrb_sym2name(mrb, id));
    }
    return c;
  }
  if (!super) {
    mrb_warn("no super class for `%s::%s', Object assumed",
             mrb_obj_classname(mrb, mrb_obj_value(outer)), mrb_sym2name(mrb, id));
  }
  c = mrb_class_new(mrb, super);
  setup_class(mrb, mrb_obj_value(outer), c, id);
  mrb_const_set(mrb, mrb_obj_value(outer), id, mrb_obj_value(c));

  return c;
}
コード例 #3
0
ファイル: struct.c プロジェクト: Kazu-zamasu/mruby_efi_shell
static mrb_value
make_struct(mrb_state *mrb, mrb_value name, mrb_value members, struct RClass * klass)
{
    mrb_value nstr, *ptr_members;
    mrb_sym id;
    long i, len;
    struct RClass *c;

    //OBJ_FREEZE(members);
    if (mrb_nil_p(name)) {
      c = mrb_class_new(mrb, klass);
      //mrb_make_metaclass(nstr, RBASIC(klass)->c);
      //mrb_class_inherited(klass, nstr);
    }
    else {
      /* old style: should we warn? */
      name = mrb_str_to_str(mrb, name);
      id = mrb_to_id(mrb, name);
      if (!mrb_is_const_id(id)) {
          //mrb_name_error(id, "identifier %s needs to be constant", StringValuePtr(name));
          mrb_name_error(mrb, id, "identifier %s needs to be constant", mrb_string_value_ptr(mrb, name));
      }
      if (mrb_const_defined_at(mrb, klass, id)) {
          //mrb_warn("redefining constant Struct::%s", StringValuePtr(name));
          mrb_warn("redefining constant Struct::%s", mrb_string_value_ptr(mrb, name));
          //?rb_mod_remove_const(klass, mrb_sym2name(mrb, id));
      }
      c = mrb_define_class_under(mrb, klass, RSTRING_PTR(name), klass);
    }
    MRB_SET_INSTANCE_TT(c, MRB_TT_STRUCT);
    nstr = mrb_obj_value(c);
    mrb_iv_set(mrb, nstr, mrb_intern(mrb, "__members__"), members);

    mrb_define_class_method(mrb, c, "new", mrb_class_new_instance_m, ARGS_ANY());
    mrb_define_class_method(mrb, c, "[]", mrb_class_new_instance_m, ARGS_ANY());
    mrb_define_class_method(mrb, c, "members", mrb_struct_s_members_m, ARGS_NONE());
    //RSTRUCT(nstr)->basic.c->super = c->c;
    ptr_members = RARRAY_PTR(members);
    len = RARRAY_LEN(members);
    for (i=0; i< len; i++) {
      mrb_sym id = SYM2ID(ptr_members[i]);
      if (mrb_is_local_id(id) || mrb_is_const_id(id)) {
          if (i < N_REF_FUNC) {
            mrb_define_method_id(mrb, c, id, (mrb_func_t)ref_func[i], 0);
          }
          else {
            mrb_define_method_id(mrb, c, id, mrb_struct_ref, 0);
          }
          mrb_define_method_id(mrb, c, mrb_id_attrset(id), (mrb_func_t)mrb_struct_set, 1);
      }
    }

    return nstr;
}
コード例 #4
0
ファイル: struct.c プロジェクト: nyanp/mruby
static mrb_value
make_struct(mrb_state *mrb, mrb_value name, mrb_value members, struct RClass * klass)
{
  mrb_value nstr, *ptr_members;
  mrb_sym id;
  mrb_int i, len;
  struct RClass *c;
  int ai;

  if (mrb_nil_p(name)) {
    c = mrb_class_new(mrb, klass);
  }
  else {
    /* old style: should we warn? */
    name = mrb_str_to_str(mrb, name);
    id = mrb_obj_to_sym(mrb, name);
    if (!mrb_is_const_id(id)) {
      mrb_name_error(mrb, id, "identifier %S needs to be constant", name);
    }
    if (mrb_const_defined_at(mrb, klass, id)) {
      mrb_warn(mrb, "redefining constant Struct::%S", name);
      /* ?rb_mod_remove_const(klass, mrb_sym2name(mrb, id)); */
    }
    c = mrb_define_class_under(mrb, klass, RSTRING_PTR(name), klass);
  }
  MRB_SET_INSTANCE_TT(c, MRB_TT_ARRAY);
  nstr = mrb_obj_value(c);
  mrb_iv_set(mrb, nstr, mrb_intern_lit(mrb, "__members__"), members);

  mrb_define_class_method(mrb, c, "new", mrb_instance_new, MRB_ARGS_ANY());
  mrb_define_class_method(mrb, c, "[]", mrb_instance_new, MRB_ARGS_ANY());
  mrb_define_class_method(mrb, c, "members", mrb_struct_s_members_m, MRB_ARGS_NONE());
  /* RSTRUCT(nstr)->basic.c->super = c->c; */
  ptr_members = RARRAY_PTR(members);
  len = RARRAY_LEN(members);
  ai = mrb_gc_arena_save(mrb);
  for (i=0; i< len; i++) {
    mrb_sym id = mrb_symbol(ptr_members[i]);
    if (mrb_is_local_id(id) || mrb_is_const_id(id)) {
      if (i < N_REF_FUNC) {
        mrb_define_method_id(mrb, c, id, ref_func[i], MRB_ARGS_NONE());
      }
      else {
        mrb_define_method_id(mrb, c, id, mrb_struct_ref, MRB_ARGS_NONE());
      }
      mrb_define_method_id(mrb, c, mrb_id_attrset(mrb, id), mrb_struct_set_m, MRB_ARGS_REQ(1));
      mrb_gc_arena_restore(mrb, ai);
    }
  }
  return nstr;
}
コード例 #5
0
ファイル: class.c プロジェクト: MichaelFrohberg/mruby
/*!
 * Defines a class under the namespace of \a outer.
 * \param outer  a class which contains the new class.
 * \param id     name of the new class
 * \param super  a class from which the new class will derive.
 *               NULL means \c Object class.
 * \return the created class
 * \throw TypeError if the constant name \a name is already taken but
 *                  the constant is not a \c Class.
 * \throw NameError if the class is already defined but the class can not
 *                  be reopened because its superclass is not \a super.
 * \post top-level constant named \a name refers the returned class.
 *
 * \note if a class named \a name is already defined and its superclass is
 *       \a super, the function just returns the defined class.
 */
struct RClass *
mrb_define_class_under(mrb_state *mrb, struct RClass *outer, const char *name, struct RClass *super)
{
  struct RClass * c;
  mrb_sym id = mrb_intern(mrb, name);

  if (mrb_const_defined_at(mrb, outer, id)) {
    c = class_from_sym(mrb, outer, id);
    if (mrb_class_real(c->super) != super) {
      mrb_name_error(mrb, id, "%S is already defined", name);
    }
    return c;
  }
  if (!super) {
    mrb_warn(mrb, "no super class for `%S::%S', Object assumed", outer, name);
  }
  c = mrb_class_new(mrb, super);
  setup_class(mrb, mrb_obj_value(outer), c, id);

  return c;
}
コード例 #6
0
ファイル: sprintf.c プロジェクト: Hozum/mruby
mrb_value
mrb_str_format(mrb_state *mrb, int argc, const mrb_value *argv, mrb_value fmt)
{
  const char *p, *end;
  char *buf;
  mrb_int blen;
  mrb_int bsiz;
  mrb_value result;
  mrb_int n;
  mrb_int width;
  mrb_int prec;
  int flags = FNONE;
  int nextarg = 1;
  int posarg = 0;
  mrb_value nextvalue;
  mrb_value tmp;
  mrb_value str;
  mrb_value hash = mrb_undef_value();

#define CHECK_FOR_WIDTH(f)                                                  \
  if ((f) & FWIDTH) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "width given twice");         \
  }                                                                         \
  if ((f) & FPREC0) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "width after precision");     \
  }
#define CHECK_FOR_FLAGS(f)                                                  \
  if ((f) & FWIDTH) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "flag after width");          \
  }                                                                         \
  if ((f) & FPREC0) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "flag after precision");      \
  }

  ++argc;
  --argv;
  mrb_string_value(mrb, &fmt);
  p = RSTRING_PTR(fmt);
  end = p + RSTRING_LEN(fmt);
  blen = 0;
  bsiz = 120;
  result = mrb_str_buf_new(mrb, bsiz);
  buf = RSTRING_PTR(result);
  memset(buf, 0, bsiz);

  for (; p < end; p++) {
    const char *t;
    mrb_sym id = 0;

    for (t = p; t < end && *t != '%'; t++) ;
    PUSH(p, t - p);
    if (t >= end)
      goto sprint_exit; /* end of fmt string */

    p = t + 1;    /* skip `%' */

    width = prec = -1;
    nextvalue = mrb_undef_value();

retry:
    switch (*p) {
      default:
        mrb_raisef(mrb, E_ARGUMENT_ERROR, "malformed format string - \\%%S", mrb_str_new(mrb, p, 1));
        break;

      case ' ':
        CHECK_FOR_FLAGS(flags);
        flags |= FSPACE;
        p++;
        goto retry;

      case '#':
        CHECK_FOR_FLAGS(flags);
        flags |= FSHARP;
        p++;
        goto retry;

      case '+':
        CHECK_FOR_FLAGS(flags);
        flags |= FPLUS;
        p++;
        goto retry;

      case '-':
        CHECK_FOR_FLAGS(flags);
        flags |= FMINUS;
        p++;
        goto retry;

      case '0':
        CHECK_FOR_FLAGS(flags);
        flags |= FZERO;
        p++;
        goto retry;

      case '1': case '2': case '3': case '4':
      case '5': case '6': case '7': case '8': case '9':
        n = 0;
        GETNUM(n, width);
        if (*p == '$') {
          if (!mrb_undef_p(nextvalue)) {
            mrb_raisef(mrb, E_ARGUMENT_ERROR, "value given twice - %S$", mrb_fixnum_value(n));
          }
          nextvalue = GETPOSARG(n);
          p++;
          goto retry;
        }
        CHECK_FOR_WIDTH(flags);
        width = n;
        flags |= FWIDTH;
        goto retry;

      case '<':
      case '{': {
        const char *start = p;
        char term = (*p == '<') ? '>' : '}';
        mrb_value symname;

        for (; p < end && *p != term; )
          p++;
        if (id) {
          mrb_raisef(mrb, E_ARGUMENT_ERROR, "name%S after <%S>",
                     mrb_str_new(mrb, start, p - start + 1), mrb_sym2str(mrb, id));
        }
        symname = mrb_str_new(mrb, start + 1, p - start - 1);
        id = mrb_intern_str(mrb, symname);
        nextvalue = GETNAMEARG(mrb_symbol_value(id), start, (int)(p - start + 1));
        if (mrb_undef_p(nextvalue)) {
          mrb_raisef(mrb, E_KEY_ERROR, "key%S not found", mrb_str_new(mrb, start, p - start + 1));
        }
        if (term == '}') goto format_s;
        p++;
        goto retry;
      }

      case '*':
        CHECK_FOR_WIDTH(flags);
        flags |= FWIDTH;
        GETASTER(width);
        if (width < 0) {
          flags |= FMINUS;
          width = -width;
        }
        p++;
        goto retry;

      case '.':
        if (flags & FPREC0) {
          mrb_raise(mrb, E_ARGUMENT_ERROR, "precision given twice");
        }
        flags |= FPREC|FPREC0;

        prec = 0;
        p++;
        if (*p == '*') {
          GETASTER(prec);
          if (prec < 0) {  /* ignore negative precision */
            flags &= ~FPREC;
          }
          p++;
          goto retry;
        }

        GETNUM(prec, precision);
        goto retry;

      case '\n':
      case '\0':
        p--;

      case '%':
        if (flags != FNONE) {
          mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid format character - %");
        }
        PUSH("%", 1);
        break;

      case 'c': {
        mrb_value val = GETARG();
        mrb_value tmp;
        unsigned int c;

        tmp = mrb_check_string_type(mrb, val);
        if (!mrb_nil_p(tmp)) {
          if (RSTRING_LEN(tmp) != 1 ) {
            mrb_raise(mrb, E_ARGUMENT_ERROR, "%c requires a character");
          }
          c = RSTRING_PTR(tmp)[0];
          n = 1;
        }
        else {
          c = mrb_fixnum(val);
          n = 1;
        }
        if (n <= 0) {
          mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid character");
        }
        if (!(flags & FWIDTH)) {
          CHECK(n);
          buf[blen] = c;
          blen += n;
        }
        else if ((flags & FMINUS)) {
          CHECK(n);
          buf[blen] = c;
          blen += n;
          FILL(' ', width-1);
        }
        else {
          FILL(' ', width-1);
          CHECK(n);
          buf[blen] = c;
          blen += n;
        }
      }
      break;

      case 's':
      case 'p':
  format_s:
      {
        mrb_value arg = GETARG();
        mrb_int len;
        mrb_int slen;

        if (*p == 'p') arg = mrb_inspect(mrb, arg);
        str = mrb_obj_as_string(mrb, arg);
        len = RSTRING_LEN(str);
        RSTRING_LEN(result) = blen;
        if (flags&(FPREC|FWIDTH)) {
          slen = RSTRING_LEN(str);
          if (slen < 0) {
            mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid mbstring sequence");
          }
          if ((flags&FPREC) && (prec < slen)) {
            char *p = RSTRING_PTR(str) + prec;
            slen = prec;
            len = p - RSTRING_PTR(str);
          }
          /* need to adjust multi-byte string pos */
          if ((flags&FWIDTH) && (width > slen)) {
            width -= (int)slen;
            if (!(flags&FMINUS)) {
              CHECK(width);
              while (width--) {
                buf[blen++] = ' ';
              }
            }
            CHECK(len);
            memcpy(&buf[blen], RSTRING_PTR(str), len);
            blen += len;
            if (flags&FMINUS) {
              CHECK(width);
              while (width--) {
                buf[blen++] = ' ';
              }
            }
            break;
          }
        }
        PUSH(RSTRING_PTR(str), len);
      }
      break;

      case 'd':
      case 'i':
      case 'o':
      case 'x':
      case 'X':
      case 'b':
      case 'B':
      case 'u': {
        mrb_value val = GETARG();
        char fbuf[32], nbuf[64], *s;
        const char *prefix = NULL;
        int sign = 0, dots = 0;
        char sc = 0;
        mrb_int v = 0, org_v = 0;
        int base;
        mrb_int len;

        switch (*p) {
          case 'd':
          case 'i':
          case 'u':
            sign = 1; break;
          case 'o':
          case 'x':
          case 'X':
          case 'b':
          case 'B':
            if (flags&(FPLUS|FSPACE)) sign = 1;
            break;
          default:
            break;
        }
        if (flags & FSHARP) {
          switch (*p) {
            case 'o': prefix = "0"; break;
            case 'x': prefix = "0x"; break;
            case 'X': prefix = "0X"; break;
            case 'b': prefix = "0b"; break;
            case 'B': prefix = "0B"; break;
            default: break;
          }
        }

  bin_retry:
        switch (mrb_type(val)) {
          case MRB_TT_FLOAT:
            if (FIXABLE(mrb_float(val))) {
              val = mrb_fixnum_value((mrb_int)mrb_float(val));
              goto bin_retry;
            }
            val = mrb_flt2big(mrb, mrb_float(val));
            if (mrb_fixnum_p(val)) goto bin_retry;
            break;
          case MRB_TT_STRING:
            val = mrb_str_to_inum(mrb, val, 0, TRUE);
            goto bin_retry;
          case MRB_TT_FIXNUM:
            v = mrb_fixnum(val);
            break;
          default:
            val = mrb_Integer(mrb, val);
            goto bin_retry;
        }

        switch (*p) {
          case 'o':
            base = 8; break;
          case 'x':
          case 'X':
            base = 16; break;
          case 'b':
          case 'B':
            base = 2; break;
          case 'u':
          case 'd':
          case 'i':
          default:
            base = 10; break;
        }

        if (base == 2) {
          org_v = v;
          if ( v < 0 && !sign ) {
            val = mrb_fix2binstr(mrb, mrb_fixnum_value(v), base);
            dots = 1;
          }
          else {
            val = mrb_fix2str(mrb, mrb_fixnum_value(v), base);
          }
          v = mrb_fixnum(mrb_str_to_inum(mrb, val, 10, 0/*Qfalse*/));
        }
        if (sign) {
          char c = *p;
          if (c == 'i') c = 'd'; /* %d and %i are identical */
          if (base == 2) c = 'd';
          if (v < 0) {
            v = -v;
            sc = '-';
            width--;
          }
          else if (flags & FPLUS) {
            sc = '+';
            width--;
          }
          else if (flags & FSPACE) {
            sc = ' ';
            width--;
          }
          snprintf(fbuf, sizeof(fbuf), "%%l%c", c);
          snprintf(nbuf, sizeof(nbuf), fbuf, v);
          s = nbuf;
        }
        else {
          char c = *p;
          if (c == 'X') c = 'x';
          if (base == 2) c = 'd';
          s = nbuf;
          if (v < 0) {
            dots = 1;
          }
          snprintf(fbuf, sizeof(fbuf), "%%l%c", c);
          snprintf(++s, sizeof(nbuf) - 1, fbuf, v);
          if (v < 0) {
            char d;

            s = remove_sign_bits(s, base);
            switch (base) {
              case 16: d = 'f'; break;
              case 8:  d = '7'; break;
              case 2:  d = '1'; break;
              default: d = 0; break;
            }

            if (d && *s != d) {
              *--s = d;
            }
          }
        }
        {
          size_t size;
          size = strlen(s);
          /* PARANOID: assert(size <= MRB_INT_MAX) */
          len = (mrb_int)size;
        }

        if (dots) {
          prec -= 2;
          width -= 2;
        }

        if (*p == 'X') {
          char *pp = s;
          int c;
          while ((c = (int)(unsigned char)*pp) != 0) {
            *pp = toupper(c);
            pp++;
          }
        }

        if (prefix && !prefix[1]) { /* octal */
          if (dots) {
            prefix = NULL;
          }
          else if (len == 1 && *s == '0') {
            len = 0;
            if (flags & FPREC) prec--;
          }
          else if ((flags & FPREC) && (prec > len)) {
            prefix = NULL;
          }
        }
        else if (len == 1 && *s == '0') {
          prefix = NULL;
        }

        if (prefix) {
          size_t size;
          size = strlen(prefix);
          /* PARANOID: assert(size <= MRB_INT_MAX).
           *  this check is absolutely paranoid. */
          width -= (mrb_int)size;
        }

        if ((flags & (FZERO|FMINUS|FPREC)) == FZERO) {
          prec = width;
          width = 0;
        }
        else {
          if (prec < len) {
            if (!prefix && prec == 0 && len == 1 && *s == '0') len = 0;
            prec = len;
          }
          width -= prec;
        }

        if (!(flags&FMINUS)) {
          CHECK(width);
          while (width-- > 0) {
            buf[blen++] = ' ';
          }
        }

        if (sc) PUSH(&sc, 1);

        if (prefix) {
          int plen = (int)strlen(prefix);
          PUSH(prefix, plen);
        }
        CHECK(prec - len);
        if (dots) PUSH("..", 2);

        if (v < 0 || (base == 2 && org_v < 0)) {
          char c = sign_bits(base, p);
          while (len < prec--) {
            buf[blen++] = c;
          }
        }
        else if ((flags & (FMINUS|FPREC)) != FMINUS) {
          char c = '0';
          while (len < prec--) {
            buf[blen++] = c;
          }
        }

        PUSH(s, len);
        CHECK(width);
        while (width-- > 0) {
          buf[blen++] = ' ';
        }
      }
      break;

      case 'f':
      case 'g':
      case 'G':
      case 'e':
      case 'E':
      case 'a':
      case 'A': {
        mrb_value val = GETARG();
        double fval;
        int i, need = 6;
        char fbuf[32];

        fval = mrb_float(mrb_Float(mrb, val));
        if (isnan(fval) || isinf(fval)) {
          const char *expr;
          const int elen = 3;

          if (isnan(fval)) {
            expr = "NaN";
          }
          else {
            expr = "Inf";
          }
          need = elen;
          if ((!isnan(fval) && fval < 0.0) || (flags & FPLUS))
            need++;
          if ((flags & FWIDTH) && need < width)
            need = width;

          CHECK(need + 1);
          n = snprintf(&buf[blen], need + 1, "%*s", need, "");
          if (flags & FMINUS) {
            if (!isnan(fval) && fval < 0.0)
              buf[blen++] = '-';
            else if (flags & FPLUS)
              buf[blen++] = '+';
            else if (flags & FSPACE)
              blen++;
            memcpy(&buf[blen], expr, elen);
          }
          else {
            if (!isnan(fval) && fval < 0.0)
              buf[blen + need - elen - 1] = '-';
            else if (flags & FPLUS)
              buf[blen + need - elen - 1] = '+';
            else if ((flags & FSPACE) && need > width)
              blen++;
            memcpy(&buf[blen + need - elen], expr, elen);
          }
          blen += strlen(&buf[blen]);
          break;
        }

        fmt_setup(fbuf, sizeof(fbuf), *p, flags, width, prec);
        need = 0;
        if (*p != 'e' && *p != 'E') {
          i = INT_MIN;
          frexp(fval, &i);
          if (i > 0)
            need = BIT_DIGITS(i);
        }
        need += (flags&FPREC) ? prec : 6;
        if ((flags&FWIDTH) && need < width)
          need = width;
        need += 20;

        CHECK(need);
        n = snprintf(&buf[blen], need, fbuf, fval);
        blen += n;
      }
      break;
    }
    flags = FNONE;
  }

  sprint_exit:
#if 0
  /* XXX - We cannot validate the number of arguments if (digit)$ style used.
   */
  if (posarg >= 0 && nextarg < argc) {
    const char *mesg = "too many arguments for format string";
    if (mrb_test(ruby_debug)) mrb_raise(mrb, E_ARGUMENT_ERROR, mesg);
    if (mrb_test(ruby_verbose)) mrb_warn("%s", mesg);
  }
#endif
  mrb_str_resize(mrb, result, blen);

  return result;
}
コード例 #7
0
ファイル: sprintf.c プロジェクト: IceDragon200/mruby
mrb_value
mrb_str_format(mrb_state *mrb, mrb_int argc, const mrb_value *argv, mrb_value fmt)
{
  const char *p, *end;
  char *buf;
  mrb_int blen;
  mrb_int bsiz;
  mrb_value result;
  mrb_int n;
  mrb_int width;
  mrb_int prec;
  int nextarg = 1;
  int posarg = 0;
  mrb_value nextvalue;
  mrb_value str;
  mrb_value hash = mrb_undef_value();

#define CHECK_FOR_WIDTH(f)                                                  \
  if ((f) & FWIDTH) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "width given twice");         \
  }                                                                         \
  if ((f) & FPREC0) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "width after precision");     \
  }
#define CHECK_FOR_FLAGS(f)                                                  \
  if ((f) & FWIDTH) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "flag after width");          \
  }                                                                         \
  if ((f) & FPREC0) {                                                       \
    mrb_raise(mrb, E_ARGUMENT_ERROR, "flag after precision");      \
  }

  ++argc;
  --argv;
  mrb_to_str(mrb, fmt);
  p = RSTRING_PTR(fmt);
  end = p + RSTRING_LEN(fmt);
  blen = 0;
  bsiz = 120;
  result = mrb_str_new_capa(mrb, bsiz);
  buf = RSTRING_PTR(result);
  memset(buf, 0, bsiz);

  for (; p < end; p++) {
    const char *t;
    mrb_sym id = 0;
    int flags = FNONE;

    for (t = p; t < end && *t != '%'; t++) ;
    if (t + 1 == end) ++t;
    PUSH(p, t - p);
    if (t >= end)
      goto sprint_exit; /* end of fmt string */

    p = t + 1;    /* skip '%' */

    width = prec = -1;
    nextvalue = mrb_undef_value();

retry:
    switch (*p) {
      default:
        mrb_raisef(mrb, E_ARGUMENT_ERROR, "malformed format string - \\%%S", mrb_str_new(mrb, p, 1));
        break;

      case ' ':
        CHECK_FOR_FLAGS(flags);
        flags |= FSPACE;
        p++;
        goto retry;

      case '#':
        CHECK_FOR_FLAGS(flags);
        flags |= FSHARP;
        p++;
        goto retry;

      case '+':
        CHECK_FOR_FLAGS(flags);
        flags |= FPLUS;
        p++;
        goto retry;

      case '-':
        CHECK_FOR_FLAGS(flags);
        flags |= FMINUS;
        p++;
        goto retry;

      case '0':
        CHECK_FOR_FLAGS(flags);
        flags |= FZERO;
        p++;
        goto retry;

      case '1': case '2': case '3': case '4':
      case '5': case '6': case '7': case '8': case '9':
        n = 0;
        GETNUM(n, width);
        if (*p == '$') {
          if (!mrb_undef_p(nextvalue)) {
            mrb_raisef(mrb, E_ARGUMENT_ERROR, "value given twice - %S$", mrb_fixnum_value(n));
          }
          nextvalue = GETPOSARG(n);
          p++;
          goto retry;
        }
        CHECK_FOR_WIDTH(flags);
        width = n;
        flags |= FWIDTH;
        goto retry;

      case '<':
      case '{': {
        const char *start = p;
        char term = (*p == '<') ? '>' : '}';
        mrb_value symname;

        for (; p < end && *p != term; )
          p++;
        if (id) {
          mrb_raisef(mrb, E_ARGUMENT_ERROR, "name%S after <%S>",
                     mrb_str_new(mrb, start, p - start + 1), mrb_sym2str(mrb, id));
        }
        symname = mrb_str_new(mrb, start + 1, p - start - 1);
        id = mrb_intern_str(mrb, symname);
        nextvalue = GETNAMEARG(mrb_symbol_value(id), start, (mrb_int)(p - start + 1));
        if (mrb_undef_p(nextvalue)) {
          mrb_raisef(mrb, E_KEY_ERROR, "key%S not found", mrb_str_new(mrb, start, p - start + 1));
        }
        if (term == '}') goto format_s;
        p++;
        goto retry;
      }

      case '*':
        CHECK_FOR_WIDTH(flags);
        flags |= FWIDTH;
        GETASTER(width);
        if (width < 0) {
          flags |= FMINUS;
          width = -width;
        }
        p++;
        goto retry;

      case '.':
        if (flags & FPREC0) {
          mrb_raise(mrb, E_ARGUMENT_ERROR, "precision given twice");
        }
        flags |= FPREC|FPREC0;

        prec = 0;
        p++;
        if (*p == '*') {
          GETASTER(prec);
          if (prec < 0) {  /* ignore negative precision */
            flags &= ~FPREC;
          }
          p++;
          goto retry;
        }

        GETNUM(prec, precision);
        goto retry;

      case '\n':
      case '\0':
        p--;
        /* fallthrough */
      case '%':
        if (flags != FNONE) {
          mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid format character - %");
        }
        PUSH("%", 1);
        break;

      case 'c': {
        mrb_value val = GETARG();
        mrb_value tmp;
        char *c;

        tmp = mrb_check_string_type(mrb, val);
        if (!mrb_nil_p(tmp)) {
          if (RSTRING_LEN(tmp) != 1) {
            mrb_raise(mrb, E_ARGUMENT_ERROR, "%c requires a character");
          }
        }
        else if (mrb_fixnum_p(val)) {
          mrb_int n = mrb_fixnum(val);

          if (n < 0x80) {
            char buf[1];

            buf[0] = (char)n;
            tmp = mrb_str_new(mrb, buf, 1);
          }
          else {
            tmp = mrb_funcall(mrb, val, "chr", 0);
            mrb_check_type(mrb, tmp, MRB_TT_STRING);
          }
        }
        else {
          mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid character");
        }
        c = RSTRING_PTR(tmp);
        n = RSTRING_LEN(tmp);
        if (!(flags & FWIDTH)) {
          PUSH(c, n);
        }
        else if ((flags & FMINUS)) {
          PUSH(c, n);
          if (width>0) FILL(' ', width-1);
        }
        else {
          if (width>0) FILL(' ', width-1);
          PUSH(c, n);
        }
      }
      break;

      case 's':
      case 'p':
  format_s:
      {
        mrb_value arg = GETARG();
        mrb_int len;
        mrb_int slen;

        if (*p == 'p') arg = mrb_inspect(mrb, arg);
        str = mrb_obj_as_string(mrb, arg);
        len = RSTRING_LEN(str);
        if (RSTRING(result)->flags & MRB_STR_EMBED) {
          mrb_int tmp_n = len;
          RSTRING(result)->flags &= ~MRB_STR_EMBED_LEN_MASK;
          RSTRING(result)->flags |= tmp_n << MRB_STR_EMBED_LEN_SHIFT;
        }
        else {
          RSTRING(result)->as.heap.len = blen;
        }
        if (flags&(FPREC|FWIDTH)) {
          slen = RSTRING_LEN(str);
          if (slen < 0) {
            mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid mbstring sequence");
          }
          if ((flags&FPREC) && (prec < slen)) {
            char *p = RSTRING_PTR(str) + prec;
            slen = prec;
            len = (mrb_int)(p - RSTRING_PTR(str));
          }
          /* need to adjust multi-byte string pos */
          if ((flags&FWIDTH) && (width > slen)) {
            width -= (int)slen;
            if (!(flags&FMINUS)) {
              FILL(' ', width);
            }
            PUSH(RSTRING_PTR(str), len);
            if (flags&FMINUS) {
              FILL(' ', width);
            }
            break;
          }
        }
        PUSH(RSTRING_PTR(str), len);
      }
      break;

      case 'd':
      case 'i':
      case 'o':
      case 'x':
      case 'X':
      case 'b':
      case 'B':
      case 'u': {
        mrb_value val = GETARG();
        char nbuf[68], *s;
        const char *prefix = NULL;
        int sign = 0, dots = 0;
        char sc = 0;
        mrb_int v = 0;
        int base;
        mrb_int len;

        if (flags & FSHARP) {
          switch (*p) {
            case 'o': prefix = "0"; break;
            case 'x': prefix = "0x"; break;
            case 'X': prefix = "0X"; break;
            case 'b': prefix = "0b"; break;
            case 'B': prefix = "0B"; break;
            default: break;
          }
        }

  bin_retry:
        switch (mrb_type(val)) {
#ifndef MRB_WITHOUT_FLOAT
          case MRB_TT_FLOAT:
            val = mrb_flo_to_fixnum(mrb, val);
            if (mrb_fixnum_p(val)) goto bin_retry;
            break;
#endif
          case MRB_TT_STRING:
            val = mrb_str_to_inum(mrb, val, 0, TRUE);
            goto bin_retry;
          case MRB_TT_FIXNUM:
            v = mrb_fixnum(val);
            break;
          default:
            val = mrb_Integer(mrb, val);
            goto bin_retry;
        }

        switch (*p) {
          case 'o':
            base = 8; break;
          case 'x':
          case 'X':
            base = 16; break;
          case 'b':
          case 'B':
            base = 2; break;
          case 'u':
          case 'd':
          case 'i':
            sign = 1;
          default:
            base = 10; break;
        }

        if (sign) {
          if (v >= 0) {
            if (flags & FPLUS) {
              sc = '+';
              width--;
            }
            else if (flags & FSPACE) {
              sc = ' ';
              width--;
            }
          }
          else {
            sc = '-';
            width--;
          }
          mrb_assert(base == 10);
          snprintf(nbuf, sizeof(nbuf), "%" MRB_PRId, v);
          s = nbuf;
          if (v < 0) s++;       /* skip minus sign */
        }
        else {
          s = nbuf;
          if (v < 0) {
            dots = 1;
          }
          switch (base) {
          case 2:
            if (v < 0) {
              val = mrb_fix2binstr(mrb, mrb_fixnum_value(v), base);
            }
            else {
              val = mrb_fixnum_to_str(mrb, mrb_fixnum_value(v), base);
            }
            strncpy(++s, RSTRING_PTR(val), sizeof(nbuf)-1);
            break;
          case 8:
            snprintf(++s, sizeof(nbuf)-1, "%" MRB_PRIo, v);
            break;
          case 16:
            snprintf(++s, sizeof(nbuf)-1, "%" MRB_PRIx, v);
            break;
          }
          if (v < 0) {
            char d;

            s = remove_sign_bits(s, base);
            switch (base) {
              case 16: d = 'f'; break;
              case 8:  d = '7'; break;
              case 2:  d = '1'; break;
              default: d = 0; break;
            }

            if (d && *s != d) {
              *--s = d;
            }
          }
        }
        {
          size_t size;
          size = strlen(s);
          /* PARANOID: assert(size <= MRB_INT_MAX) */
          len = (mrb_int)size;
        }

        if (*p == 'X') {
          char *pp = s;
          int c;
          while ((c = (int)(unsigned char)*pp) != 0) {
            *pp = toupper(c);
            pp++;
          }
        }

        if (prefix && !prefix[1]) { /* octal */
          if (dots) {
            prefix = NULL;
          }
          else if (len == 1 && *s == '0') {
            len = 0;
            if (flags & FPREC) prec--;
          }
          else if ((flags & FPREC) && (prec > len)) {
            prefix = NULL;
          }
        }
        else if (len == 1 && *s == '0') {
          prefix = NULL;
        }

        if (prefix) {
          size_t size;
          size = strlen(prefix);
          /* PARANOID: assert(size <= MRB_INT_MAX).
           *  this check is absolutely paranoid. */
          width -= (mrb_int)size;
        }

        if ((flags & (FZERO|FMINUS|FPREC)) == FZERO) {
          prec = width;
          width = 0;
        }
        else {
          if (prec < len) {
            if (!prefix && prec == 0 && len == 1 && *s == '0') len = 0;
            prec = len;
          }
          width -= prec;
        }

        if (!(flags&FMINUS) && width > 0) {
          FILL(' ', width);
          width = 0;
        }

        if (sc) PUSH(&sc, 1);

        if (prefix) {
          int plen = (int)strlen(prefix);
          PUSH(prefix, plen);
        }
        if (dots) {
          prec -= 2;
          width -= 2;
          PUSH("..", 2);
        }

        if (prec > len) {
          CHECK(prec - len);
          if ((flags & (FMINUS|FPREC)) != FMINUS) {
            char c = '0';
            FILL(c, prec - len);
          } else if (v < 0) {
            char c = sign_bits(base, p);
            FILL(c, prec - len);
          }
        }
        PUSH(s, len);
        if (width > 0) {
          FILL(' ', width);
        }
      }
      break;

#ifndef MRB_WITHOUT_FLOAT
      case 'f':
      case 'g':
      case 'G':
      case 'e':
      case 'E':
      case 'a':
      case 'A': {
        mrb_value val = GETARG();
        double fval;
        mrb_int i;
        mrb_int need = 6;
        char fbuf[32];
        int frexp_result;

        fval = mrb_float(mrb_Float(mrb, val));
        if (!isfinite(fval)) {
          const char *expr;
          const mrb_int elen = 3;
          char sign = '\0';

          if (isnan(fval)) {
            expr = "NaN";
          }
          else {
            expr = "Inf";
          }
          need = elen;
          if (!isnan(fval) && fval < 0.0)
            sign = '-';
          else if (flags & (FPLUS|FSPACE))
            sign = (flags & FPLUS) ? '+' : ' ';
          if (sign)
            ++need;
          if ((flags & FWIDTH) && need < width)
            need = width;

          if (need < 0) {
            mrb_raise(mrb, E_ARGUMENT_ERROR, "width too big");
          }
          FILL(' ', need);
          if (flags & FMINUS) {
            if (sign)
              buf[blen - need--] = sign;
            memcpy(&buf[blen - need], expr, elen);
          }
          else {
            if (sign)
              buf[blen - elen - 1] = sign;
            memcpy(&buf[blen - elen], expr, elen);
          }
          break;
        }

        fmt_setup(fbuf, sizeof(fbuf), *p, flags, width, prec);
        need = 0;
        if (*p != 'e' && *p != 'E') {
          i = INT_MIN;
          frexp(fval, &frexp_result);
          i = (mrb_int)frexp_result;
          if (i > 0)
            need = BIT_DIGITS(i);
        }
        if (need > MRB_INT_MAX - ((flags&FPREC) ? prec : 6)) {
        too_big_width:
          mrb_raise(mrb, E_ARGUMENT_ERROR,
                    (width > prec ? "width too big" : "prec too big"));
        }
        need += (flags&FPREC) ? prec : 6;
        if ((flags&FWIDTH) && need < width)
          need = width;
        if (need > MRB_INT_MAX - 20) {
          goto too_big_width;
        }
        need += 20;

        CHECK(need);
        n = snprintf(&buf[blen], need, fbuf, fval);
        if (n < 0 || n >= need) {
          mrb_raise(mrb, E_RUNTIME_ERROR, "formatting error");
        }
        blen += n;
      }
      break;
#endif
    }
    flags = FNONE;
  }

  sprint_exit:
#if 0
  /* XXX - We cannot validate the number of arguments if (digit)$ style used.
   */
  if (posarg >= 0 && nextarg < argc) {
    const char *mesg = "too many arguments for format string";
    if (mrb_test(ruby_debug)) mrb_raise(mrb, E_ARGUMENT_ERROR, mesg);
    if (mrb_test(ruby_verbose)) mrb_warn(mrb, "%S", mrb_str_new_cstr(mrb, mesg));
  }
#endif
  mrb_str_resize(mrb, result, blen);

  return result;
}