C++ sexp_make_fixnum函数代码示例

static sexp sexp_free_sizes (sexp ctx, sexp self, sexp_sint_t n) {
  size_t freed;
  sexp_uint_t sizes[512];
  sexp_sint_t i;
  sexp_heap h = sexp_context_heap(ctx);
  sexp_free_list q;
  sexp_gc_var2(res, tmp);

  /* run gc once to remove unused variables */
  sexp_gc(ctx, &freed);

  /* initialize stats */
  for (i=0; i<512; i++)
    sizes[i]=0;

  /* loop over each free block */
  for ( ; h; h=h->next)
    for (q=h->free_list; q; q=q->next)
      sizes[sexp_heap_chunks(q->size) > 511 ? 511 : sexp_heap_chunks(q->size)]++;

  /* build and return results */
  sexp_gc_preserve2(ctx, res, tmp);
  res = SEXP_NULL;
  for (i=511; i>=0; i--)
    if (sizes[i]) {
      tmp = sexp_cons(ctx, sexp_make_fixnum(i), sexp_make_fixnum(sizes[i]));
      res = sexp_cons(ctx, tmp, res);
    }
  sexp_gc_release2(ctx);
  return res;
}

sexp sexp_string_count (sexp ctx, sexp self, sexp ch, sexp str, sexp start, sexp end) {
  const unsigned char *s, *e;
  sexp_sint_t c, count = 0;
#if SEXP_USE_UTF8_STRINGS
  sexp_sint_t i;
#endif
  sexp_assert_type(ctx, sexp_charp, SEXP_CHAR, ch);
  sexp_assert_type(ctx, sexp_stringp, SEXP_STRING, str);
  sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, start);
  if (sexp_not(end)) end = sexp_make_fixnum(sexp_string_size(str));
  else sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, end);
  c = sexp_unbox_character(ch);
#if SEXP_USE_UTF8_STRINGS
  if (c < 128) {
#endif
    s = (unsigned char*)sexp_string_data(str) + sexp_unbox_fixnum(start);
    e = (unsigned char*)sexp_string_data(str) + sexp_unbox_fixnum(end);
    if (e > (unsigned char*)sexp_string_data(str) + sexp_string_size(str))
      return sexp_user_exception(ctx, self, "string-count: end index out of range", end);
    /* fast case for ASCII chars */
    while (s < e) if (*s++ == c) count++;
#if SEXP_USE_UTF8_STRINGS
  } else {
    /* decode utf8 chars */
    s = (unsigned char*)sexp_string_data(str);
    for (i = sexp_unbox_fixnum(start); i < sexp_unbox_fixnum(end);
         i += sexp_utf8_initial_byte_count(s[i]))
      if (sexp_string_utf8_ref(ctx, str, sexp_make_fixnum(i)) == ch) count++;
  }
#endif
  return sexp_make_fixnum(count);
}

sexp sexp_init_library (sexp ctx, sexp self, sexp_sint_t n, sexp env, const char* version, sexp_abi_identifier_t abi) {
  sexp t;
  sexp_gc_var1(name);
  if (!(sexp_version_compatible(ctx, version, sexp_version)
        && sexp_abi_compatible(ctx, abi, SEXP_ABI_IDENTIFIER)))
    return SEXP_ABI_ERROR;

#if SEXP_USE_GREEN_THREADS

  sexp_gc_preserve1(ctx, name);

  sexp_global(ctx, SEXP_G_THREADS_MUTEX_ID) = sexp_lookup_named_type(ctx, env, "Mutex");
  name = sexp_c_string(ctx, "pollfds", -1);
  t = sexp_register_type(ctx, name, SEXP_FALSE, SEXP_FALSE,
                         SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO,
                         SEXP_ZERO, sexp_make_fixnum(sexp_sizeof_pollfds),
                         SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO,
                         SEXP_ZERO, SEXP_ZERO, NULL,
                         (sexp_proc2)sexp_free_pollfds);
  if (sexp_typep(t)) {
    sexp_global(ctx, SEXP_G_THREADS_POLLFDS_ID) = sexp_make_fixnum(sexp_type_tag(t));
  }

  sexp_define_type_predicate_by_tag(ctx, env, "thread?", SEXP_CONTEXT);
  sexp_define_foreign(ctx, env, "thread-timeout?", 0, sexp_thread_timeoutp);
  sexp_define_foreign(ctx, env, "current-thread", 0, sexp_current_thread);
  sexp_define_foreign_opt(ctx, env, "make-thread", 2, sexp_make_thread, SEXP_FALSE);
  sexp_define_foreign(ctx, env, "thread-start!", 1, sexp_thread_start);
  sexp_define_foreign(ctx, env, "%thread-terminate!", 1, sexp_thread_terminate);
  sexp_define_foreign(ctx, env, "%thread-join!", 2, sexp_thread_join);
  sexp_define_foreign(ctx, env, "%thread-sleep!", 1, sexp_thread_sleep);
  sexp_define_foreign(ctx, env, "thread-name", 1, sexp_thread_name);
  sexp_define_foreign(ctx, env, "thread-specific", 1, sexp_thread_specific);
  sexp_define_foreign(ctx, env, "thread-specific-set!", 2, sexp_thread_specific_set);
  sexp_define_foreign(ctx, env, "%thread-end-result", 1, sexp_thread_end_result);
  sexp_define_foreign(ctx, env, "%thread-exception?", 1, sexp_thread_exceptionp);
  sexp_define_foreign(ctx, env, "mutex-state", 1, sexp_mutex_state);
  sexp_define_foreign(ctx, env, "%mutex-lock!", 3, sexp_mutex_lock);
  sexp_define_foreign(ctx, env, "%mutex-unlock!", 3, sexp_mutex_unlock);
  sexp_define_foreign(ctx, env, "condition-variable-signal!", 1, sexp_condition_variable_signal);
  sexp_define_foreign(ctx, env, "condition-variable-broadcast!", 1, sexp_condition_variable_broadcast);
  sexp_define_foreign(ctx, env, "pop-signal!", 0, sexp_pop_signal);
  sexp_define_foreign(ctx, env, "get-signal-handler", 1, sexp_get_signal_handler);

  sexp_global(ctx, SEXP_G_THREADS_SCHEDULER)
    = sexp_make_foreign(ctx, "scheduler", 1, 0, (sexp_proc1)sexp_scheduler, SEXP_FALSE);
  sexp_global(ctx, SEXP_G_THREADS_BLOCKER)
    = sexp_make_foreign(ctx, "blocker", 1, 0, (sexp_proc1)sexp_blocker, SEXP_FALSE);

  /* remember the env to lookup the runner later */
  sexp_global(ctx, SEXP_G_THREADS_SIGNAL_RUNNER) = env;

  sexp_gc_release1(ctx);

#endif  /* SEXP_USE_GREEN_THREADS */

  return SEXP_VOID;
}

static sexp sexp_pop_signal (sexp ctx, sexp self, sexp_sint_t n) {
  int allsigs, restsigs, signum;
  if (sexp_global(ctx, SEXP_G_THREADS_SIGNALS) == SEXP_ZERO) {
    return SEXP_FALSE;
  } else {
    allsigs = sexp_unbox_fixnum(sexp_global(ctx, SEXP_G_THREADS_SIGNALS));
    restsigs = allsigs & (allsigs-1);
    sexp_global(ctx, SEXP_G_THREADS_SIGNALS) = sexp_make_fixnum(restsigs);
    signum = sexp_log2_of_pow2(allsigs-restsigs);
    return sexp_make_fixnum(signum);
  }
}

static sexp sexp_make_custom_port (sexp ctx, sexp self,
                                   char *mode, sexp read, sexp write,
                                   sexp seek, sexp close) {
  sexp vec;
  sexp_gc_var2(res, str);
  sexp_gc_preserve2(ctx, res, str);
  str = sexp_make_string(ctx, sexp_make_fixnum(SEXP_PORT_BUFFER_SIZE), SEXP_VOID);
  if (sexp_exceptionp(str)) return str;
  res = sexp_open_input_string(ctx, str);
  if (sexp_exceptionp(res)) return res;
  if (mode && mode[0] == 'w') {
    sexp_pointer_tag(res) = SEXP_OPORT;
    sexp_port_cookie(res) = str;
  } else {
    sexp_port_offset(res) = 0;
    sexp_port_size(res) = 0;
  }
  vec = sexp_make_vector(ctx, SEXP_SIX, SEXP_VOID);
  if (sexp_exceptionp(vec)) return vec;
  sexp_vector_set(vec, SEXP_ZERO, SEXP_FALSE);
  sexp_vector_set(vec, SEXP_ONE, sexp_port_cookie(res));
  sexp_vector_set(vec, SEXP_TWO, read);
  sexp_vector_set(vec, SEXP_THREE, write);
  sexp_vector_set(vec, SEXP_FOUR, seek);
  sexp_vector_set(vec, SEXP_FIVE, close);
  sexp_port_cookie(res) = vec;
  sexp_gc_release2(ctx);
  return res;
}

static sexp sexp_bit_and (sexp ctx, sexp self, sexp_sint_t n, sexp x, sexp y) {
  sexp res;
#if SEXP_USE_BIGNUMS
  sexp_sint_t len, i;
#endif
  if (sexp_fixnump(x)) {
    if (sexp_fixnump(y))
      res = (sexp) ((sexp_uint_t)x & (sexp_uint_t)y);
#if SEXP_USE_BIGNUMS
    else if (sexp_bignump(y))
      res = sexp_bit_and(ctx, self, n, y, x);
#endif
    else
      res = sexp_type_exception(ctx, self, SEXP_FIXNUM, y);
#if SEXP_USE_BIGNUMS
  } else if (sexp_bignump(x)) {
    if (sexp_fixnump(y)) {
      res = sexp_make_fixnum(sexp_unbox_fixnum(y) & sexp_bignum_data(x)[0]);
    } else if (sexp_bignump(y)) {
      if (sexp_bignum_length(x) < sexp_bignum_length(y))
        res = sexp_copy_bignum(ctx, NULL, x, 0);
      else
        res = sexp_copy_bignum(ctx, NULL, y, 0);
      for (i=0, len=sexp_bignum_length(res); i<len; i++)
        sexp_bignum_data(res)[i]
          = sexp_bignum_data(x)[i] & sexp_bignum_data(y)[i];
    } else {
      res = sexp_type_exception(ctx, self, SEXP_FIXNUM, y);
    }
#endif
  } else {
    res = sexp_type_exception(ctx, self, SEXP_FIXNUM, x);
  }
  return sexp_bignum_normalize(res);
}

static sexp sexp_rs_random_integer (sexp ctx, sexp self, sexp_sint_t n, sexp rs, sexp bound) {
  sexp res;
  int32_t m;
#if SEXP_USE_BIGNUMS
  int32_t hi, mod, len, i, *data;
#endif
  if (! sexp_random_source_p(rs))
    res = sexp_type_exception(ctx, self, rs_type_id, rs);
  if (sexp_fixnump(bound)) {
    sexp_call_random(rs, m);
    res = sexp_make_fixnum(m % sexp_unbox_fixnum(bound));
#if SEXP_USE_BIGNUMS
  } else if (sexp_bignump(bound)) {
    hi = sexp_bignum_hi(bound);
    len = hi * sizeof(sexp_uint_t) / sizeof(int32_t);
    res = sexp_make_bignum(ctx, hi);
    data = (int32_t*) sexp_bignum_data(res);
    for (i=0; i<len-1; i++) {
      sexp_call_random(rs, m);
      data[i] = m;
    }
    sexp_call_random(rs, m);
    mod = sexp_bignum_data(bound)[hi-1] * sizeof(int32_t) / sizeof(sexp_uint_t);
    if (mod)
      data[i] = m % mod;
#endif
  } else {
    res = sexp_type_exception(ctx, self, SEXP_FIXNUM, bound);
  }
  return res;
}

static sexp sexp_object_size (sexp ctx, sexp self, sexp_sint_t n, sexp x) {
  sexp t;
  if ((! sexp_pointerp(x)) || (sexp_pointer_tag(x) >= sexp_context_num_types(ctx)))
    return SEXP_ZERO;
  t = sexp_object_type(ctx, x);
  return sexp_make_fixnum(sexp_type_size_of_object(t, x));
}

static sexp sexp_string_contains (sexp ctx, sexp self, sexp_sint_t n, sexp x, sexp y) {
  const char *res;
  sexp_assert_type(ctx, sexp_stringp, SEXP_STRING, x);
  sexp_assert_type(ctx, sexp_stringp, SEXP_STRING, y);
  res = strstr(sexp_string_data(x), sexp_string_data(y));
  return res ? sexp_make_fixnum(res-sexp_string_data(x)) : SEXP_FALSE;
}

static sexp sexp_duplicate_file_descriptor_stub (sexp ctx, sexp self, sexp_sint_t n, sexp arg0) {
  sexp res;
  if (! (sexp_filenop(arg0) || sexp_fixnump(arg0)))
    return sexp_type_exception(ctx, self, SEXP_FILENO, arg0);
  res = sexp_make_fileno(ctx, sexp_make_fixnum(dup((sexp_filenop(arg0) ? sexp_fileno_fd(arg0) : sexp_unbox_fixnum(arg0)))), SEXP_FALSE);
  return res;
}

static sexp sexp_errno (sexp ctx, sexp self, sexp_sint_t n) {
#ifdef PLAN9
  return SEXP_FALSE;
#else
  return sexp_make_fixnum(errno);
#endif
}

static sexp sexp_string_cursor_copy (sexp ctx, sexp self, sexp_sint_t n, sexp dst, sexp sfrom, sexp src, sexp sstart, sexp send) {
  unsigned char *pfrom, *pto, *pstart, *pend, *prev, *p;
  sexp_sint_t from = sexp_unbox_fixnum(sfrom), to = sexp_string_size(dst),
    start = sexp_unbox_fixnum(sstart), end = sexp_unbox_fixnum(send);
  sexp_assert_type(ctx, sexp_stringp, SEXP_STRING, dst);
  sexp_assert_type(ctx, sexp_stringp, SEXP_STRING, src);
  sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, sfrom);
  sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, sstart);
  sexp_assert_type(ctx, sexp_fixnump, SEXP_FIXNUM, send);
  if (from < 0 || from > to)
    return sexp_user_exception(ctx, self, "string-cursor-copy!: from out of range", sfrom);
  if (start < 0 || start > sexp_string_size(src))
    return sexp_user_exception(ctx, self, "string-cursor-copy!: start out of range", sstart);
  if (end < start || end > sexp_string_size(src))
    return sexp_user_exception(ctx, self, "string-cursor-copy!: end out of range", send);
  pfrom = (unsigned char*)sexp_string_data(dst) + from;
  pto = (unsigned char*)sexp_string_data(dst) + to;
  pstart = (unsigned char*)sexp_string_data(src) + start;
  pend = (unsigned char*)sexp_string_data(src) + end;
  for ( ; pfrom < pto && pstart < pend; ++pfrom, ++pstart)
    *pfrom = *pstart;
  /* adjust for incomplete trailing chars */
  prev = (unsigned char*)sexp_string_utf8_prev(pfrom);
  if (sexp_utf8_initial_byte_count(*prev) > pfrom - prev) {
    for (p = prev; p < pfrom; ++p)
      *p = '\0';
    pstart -= pfrom - prev;
  }
  return sexp_make_fixnum(pstart - (unsigned char*)sexp_string_data(src));
}

static sexp sexp_heap_walk (sexp ctx, int depth, int printp) {
  size_t freed;
  sexp_uint_t stats[256], hi_type=0, i;
  sexp_heap h = sexp_context_heap(ctx);
  sexp p, out=SEXP_FALSE;
  sexp_free_list q, r;
  char *end;
  sexp_gc_var3(res, tmp, name);

  if (printp)
    out = sexp_parameter_ref(ctx,
                             sexp_env_ref(ctx,
                                          sexp_context_env(ctx),
                                          sexp_global(ctx,SEXP_G_CUR_OUT_SYMBOL),
                                          SEXP_FALSE));

  /* run gc once to remove unused variables */
  sexp_gc(ctx, &freed);

  /* initialize stats */
  for (i=0; i<256; i++) stats[i]=0;

  /* loop over each heap chunk */
  for ( ; h; h=h->next) {
    p = (sexp) (h->data + sexp_heap_align(sexp_sizeof(pair)));
    q = h->free_list;
    end = (char*)h->data + h->size;
    while (((char*)p) < end) {
      /* find the preceding and succeeding free list pointers */
      for (r=q->next; r && ((char*)r<(char*)p); q=r, r=r->next)
        ;
      if ((char*)r == (char*)p) { /* this is a free block, skip */
        p = (sexp) (((char*)p) + r->size);
        continue;
      }
      /* otherwise maybe print, then increment the stat and continue */
      if (sexp_oportp(out)) {
        sexp_print_simple(ctx, p, out, depth);
        sexp_write_char(ctx, '\n', out);
      }
      stats[sexp_pointer_tag(p)]++;
      if (sexp_pointer_tag(p) > hi_type)
        hi_type = sexp_pointer_tag(p);
      p = (sexp) (((char*)p) + sexp_heap_align(sexp_allocated_bytes(ctx, p)));
    }
  }

  /* build and return results */
  sexp_gc_preserve3(ctx, res, tmp, name);
  res = SEXP_NULL;
  for (i=hi_type; i>0; i--)
    if (stats[i]) {
      name = sexp_string_to_symbol(ctx, sexp_type_name_by_index(ctx, i));
      tmp = sexp_cons(ctx, name, sexp_make_fixnum(stats[i]));
      res = sexp_cons(ctx, tmp, res);
    }
  sexp_gc_release3(ctx);
  return res;
}

static void sexp_define_accessors (sexp ctx, sexp env, sexp_uint_t ctype,
                                   sexp_uint_t cindex, char* get, char *set) {
  sexp type, index;
  sexp_gc_var2(name, op);
  sexp_gc_preserve2(ctx, name, op);
  type = sexp_make_fixnum(ctype);
  index = sexp_make_fixnum(cindex);
  if (get) {
    op = sexp_make_getter(ctx, name=sexp_c_string(ctx, get, -1), type, index);
    sexp_env_define(ctx, env, name=sexp_intern(ctx, get, -1), op);
  }
  if (set) {
    op = sexp_make_setter(ctx, name=sexp_c_string(ctx, set, -1), type, index);
    sexp_env_define(ctx, env, name=sexp_intern(ctx, set, -1), op);
  }
  sexp_gc_release2(ctx);
}

static ssize_t sexp_cookie_writer (void *cookie, const char *buffer, size_t size)
#endif
{
  sexp vec = (sexp)cookie, ctx, res;
  if (! sexp_procedurep(sexp_cookie_write(vec))) return -1;
  sexp_gc_var2(ctx2, args);
  ctx = sexp_cookie_ctx(vec);
  ctx2 = sexp_last_context(ctx, (sexp*)&cookie);
  sexp_gc_preserve2(ctx, ctx2, args);
  if (size > sexp_string_length(sexp_cookie_buffer(vec)))
    sexp_cookie_buffer_set(vec, sexp_make_string(ctx, sexp_make_fixnum(size), SEXP_VOID));
  memcpy(sexp_string_data(sexp_cookie_buffer(vec)), buffer, size);
  args = sexp_list2(ctx, sexp_cookie_buffer(vec), sexp_make_fixnum(size));
  res = sexp_apply(ctx, sexp_cookie_write(vec), args);
  sexp_gc_release2(ctx);
  return (sexp_fixnump(res) ? sexp_unbox_fixnum(res) : -1);
}