475 lines
13 KiB
C
475 lines
13 KiB
C
/**************************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. */
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/* */
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/* All rights reserved. This file is distributed under the terms of */
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/* the GNU Lesser General Public License version 2.1, with the */
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/* special exception on linking described in the file LICENSE. */
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/* */
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/**************************************************************************/
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#define CAML_INTERNALS
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/* Operations on strings */
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "caml/alloc.h"
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#include "caml/fail.h"
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#include "caml/memory.h"
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#include "caml/mlvalues.h"
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#include "caml/misc.h"
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/* returns a number of bytes (chars) */
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CAMLexport mlsize_t caml_string_length(value s)
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{
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mlsize_t temp;
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temp = Bosize_val(s) - 1;
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CAMLassert (Byte (s, temp - Byte (s, temp)) == 0);
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return temp - Byte (s, temp);
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}
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/* returns a value that represents a number of bytes (chars) */
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CAMLprim value caml_ml_string_length(value s)
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{
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mlsize_t temp;
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temp = Bosize_val(s) - 1;
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CAMLassert (Byte (s, temp - Byte (s, temp)) == 0);
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return Val_long(temp - Byte (s, temp));
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}
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CAMLprim value caml_ml_bytes_length(value s)
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{
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return caml_ml_string_length(s);
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}
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CAMLexport int caml_string_is_c_safe (value s)
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{
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return strlen(String_val(s)) == caml_string_length(s);
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}
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/**
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* [caml_create_string] is deprecated,
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* use [caml_create_bytes] instead
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*/
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CAMLprim value caml_create_string(value len)
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{
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mlsize_t size = Long_val(len);
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if (size > Bsize_wsize (Max_wosize) - 1){
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caml_invalid_argument("String.create");
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}
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return caml_alloc_string(size);
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}
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/* [len] is a value that represents a number of bytes (chars) */
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CAMLprim value caml_create_bytes(value len)
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{
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mlsize_t size = Long_val(len);
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if (size > Bsize_wsize (Max_wosize) - 1){
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caml_invalid_argument("Bytes.create");
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}
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return caml_alloc_string(size);
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}
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CAMLprim value caml_string_get(value str, value index)
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{
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intnat idx = Long_val(index);
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if (idx < 0 || idx >= caml_string_length(str)) caml_array_bound_error();
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return Val_int(Byte_u(str, idx));
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}
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CAMLprim value caml_bytes_get(value str, value index)
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{
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return caml_string_get(str, index);
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}
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CAMLprim value caml_bytes_set(value str, value index, value newval)
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{
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intnat idx = Long_val(index);
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if (idx < 0 || idx >= caml_string_length(str)) caml_array_bound_error();
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Byte_u(str, idx) = Int_val(newval);
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return Val_unit;
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}
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/**
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* [caml_string_set] is deprecated,
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* use [caml_bytes_set] instead
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*/
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CAMLprim value caml_string_set(value str, value index, value newval)
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{
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return caml_bytes_set(str,index,newval);
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}
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CAMLprim value caml_string_get16(value str, value index)
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{
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intnat res;
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unsigned char b1, b2;
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intnat idx = Long_val(index);
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if (idx < 0 || idx + 1 >= caml_string_length(str)) caml_array_bound_error();
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b1 = Byte_u(str, idx);
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b2 = Byte_u(str, idx + 1);
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#ifdef ARCH_BIG_ENDIAN
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res = b1 << 8 | b2;
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#else
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res = b2 << 8 | b1;
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#endif
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return Val_int(res);
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}
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CAMLprim value caml_bytes_get16(value str, value index)
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{
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return caml_string_get16(str,index);
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}
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CAMLprim value caml_string_get32(value str, value index)
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{
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int32_t res;
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unsigned char b1, b2, b3, b4;
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intnat idx = Long_val(index);
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if (idx < 0 || idx + 3 >= caml_string_length(str)) caml_array_bound_error();
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b1 = Byte_u(str, idx);
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b2 = Byte_u(str, idx + 1);
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b3 = Byte_u(str, idx + 2);
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b4 = Byte_u(str, idx + 3);
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#ifdef ARCH_BIG_ENDIAN
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res = b1 << 24 | b2 << 16 | b3 << 8 | b4;
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#else
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res = b4 << 24 | b3 << 16 | b2 << 8 | b1;
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#endif
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return caml_copy_int32(res);
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}
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CAMLprim value caml_bytes_get32(value str, value index)
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{
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return caml_string_get32(str,index);
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}
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CAMLprim value caml_string_get64(value str, value index)
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{
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uint64_t res;
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unsigned char b1, b2, b3, b4, b5, b6, b7, b8;
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intnat idx = Long_val(index);
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if (idx < 0 || idx + 7 >= caml_string_length(str)) caml_array_bound_error();
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b1 = Byte_u(str, idx);
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b2 = Byte_u(str, idx + 1);
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b3 = Byte_u(str, idx + 2);
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b4 = Byte_u(str, idx + 3);
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b5 = Byte_u(str, idx + 4);
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b6 = Byte_u(str, idx + 5);
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b7 = Byte_u(str, idx + 6);
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b8 = Byte_u(str, idx + 7);
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#ifdef ARCH_BIG_ENDIAN
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res = (uint64_t) b1 << 56 | (uint64_t) b2 << 48
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| (uint64_t) b3 << 40 | (uint64_t) b4 << 32
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| (uint64_t) b5 << 24 | (uint64_t) b6 << 16
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| (uint64_t) b7 << 8 | (uint64_t) b8;
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#else
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res = (uint64_t) b8 << 56 | (uint64_t) b7 << 48
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| (uint64_t) b6 << 40 | (uint64_t) b5 << 32
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| (uint64_t) b4 << 24 | (uint64_t) b3 << 16
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| (uint64_t) b2 << 8 | (uint64_t) b1;
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#endif
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return caml_copy_int64(res);
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}
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CAMLprim value caml_bytes_get64(value str, value index)
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{
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return caml_string_get64(str,index);
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}
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CAMLprim value caml_bytes_set16(value str, value index, value newval)
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{
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unsigned char b1, b2;
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intnat val;
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intnat idx = Long_val(index);
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if (idx < 0 || idx + 1 >= caml_string_length(str)) caml_array_bound_error();
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val = Long_val(newval);
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#ifdef ARCH_BIG_ENDIAN
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b1 = 0xFF & val >> 8;
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b2 = 0xFF & val;
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#else
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b2 = 0xFF & val >> 8;
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b1 = 0xFF & val;
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#endif
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Byte_u(str, idx) = b1;
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Byte_u(str, idx + 1) = b2;
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return Val_unit;
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}
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CAMLprim value caml_bytes_set32(value str, value index, value newval)
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{
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unsigned char b1, b2, b3, b4;
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intnat val;
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intnat idx = Long_val(index);
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if (idx < 0 || idx + 3 >= caml_string_length(str)) caml_array_bound_error();
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val = Int32_val(newval);
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#ifdef ARCH_BIG_ENDIAN
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b1 = 0xFF & val >> 24;
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b2 = 0xFF & val >> 16;
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b3 = 0xFF & val >> 8;
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b4 = 0xFF & val;
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#else
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b4 = 0xFF & val >> 24;
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b3 = 0xFF & val >> 16;
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b2 = 0xFF & val >> 8;
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b1 = 0xFF & val;
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#endif
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Byte_u(str, idx) = b1;
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Byte_u(str, idx + 1) = b2;
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Byte_u(str, idx + 2) = b3;
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Byte_u(str, idx + 3) = b4;
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return Val_unit;
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}
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CAMLprim value caml_bytes_set64(value str, value index, value newval)
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{
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unsigned char b1, b2, b3, b4, b5, b6, b7, b8;
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int64_t val;
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intnat idx = Long_val(index);
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if (idx < 0 || idx + 7 >= caml_string_length(str)) caml_array_bound_error();
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val = Int64_val(newval);
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#ifdef ARCH_BIG_ENDIAN
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b1 = 0xFF & val >> 56;
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b2 = 0xFF & val >> 48;
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b3 = 0xFF & val >> 40;
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b4 = 0xFF & val >> 32;
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b5 = 0xFF & val >> 24;
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b6 = 0xFF & val >> 16;
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b7 = 0xFF & val >> 8;
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b8 = 0xFF & val;
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#else
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b8 = 0xFF & val >> 56;
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b7 = 0xFF & val >> 48;
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b6 = 0xFF & val >> 40;
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b5 = 0xFF & val >> 32;
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b4 = 0xFF & val >> 24;
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b3 = 0xFF & val >> 16;
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b2 = 0xFF & val >> 8;
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b1 = 0xFF & val;
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#endif
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Byte_u(str, idx) = b1;
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Byte_u(str, idx + 1) = b2;
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Byte_u(str, idx + 2) = b3;
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Byte_u(str, idx + 3) = b4;
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Byte_u(str, idx + 4) = b5;
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Byte_u(str, idx + 5) = b6;
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Byte_u(str, idx + 6) = b7;
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Byte_u(str, idx + 7) = b8;
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return Val_unit;
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}
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CAMLprim value caml_string_equal(value s1, value s2)
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{
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mlsize_t sz1, sz2;
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value * p1, * p2;
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if (s1 == s2) return Val_true;
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sz1 = Wosize_val(s1);
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sz2 = Wosize_val(s2);
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if (sz1 != sz2) return Val_false;
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for(p1 = Op_val(s1), p2 = Op_val(s2); sz1 > 0; sz1--, p1++, p2++)
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if (*p1 != *p2) return Val_false;
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return Val_true;
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}
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CAMLprim value caml_bytes_equal(value s1, value s2)
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{
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return caml_string_equal(s1,s2);
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}
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CAMLprim value caml_string_notequal(value s1, value s2)
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{
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return Val_not(caml_string_equal(s1, s2));
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}
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CAMLprim value caml_bytes_notequal(value s1, value s2)
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{
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return caml_string_notequal(s1,s2);
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}
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CAMLprim value caml_string_compare(value s1, value s2)
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{
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mlsize_t len1, len2;
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int res;
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if (s1 == s2) return Val_int(0);
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len1 = caml_string_length(s1);
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len2 = caml_string_length(s2);
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res = memcmp(String_val(s1), String_val(s2), len1 <= len2 ? len1 : len2);
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if (res < 0) return Val_int(-1);
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if (res > 0) return Val_int(1);
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if (len1 < len2) return Val_int(-1);
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if (len1 > len2) return Val_int(1);
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return Val_int(0);
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}
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CAMLprim value caml_bytes_compare(value s1, value s2)
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{
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return caml_string_compare(s1,s2);
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}
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CAMLprim value caml_string_lessthan(value s1, value s2)
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{
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return caml_string_compare(s1, s2) < Val_int(0) ? Val_true : Val_false;
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}
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CAMLprim value caml_bytes_lessthan(value s1, value s2)
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{
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return caml_string_lessthan(s1,s2);
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}
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CAMLprim value caml_string_lessequal(value s1, value s2)
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{
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return caml_string_compare(s1, s2) <= Val_int(0) ? Val_true : Val_false;
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}
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CAMLprim value caml_bytes_lessequal(value s1, value s2)
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{
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return caml_string_lessequal(s1,s2);
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}
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CAMLprim value caml_string_greaterthan(value s1, value s2)
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{
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return caml_string_compare(s1, s2) > Val_int(0) ? Val_true : Val_false;
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}
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CAMLprim value caml_bytes_greaterthan(value s1, value s2)
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{
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return caml_string_greaterthan(s1,s2);
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}
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CAMLprim value caml_string_greaterequal(value s1, value s2)
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{
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return caml_string_compare(s1, s2) >= Val_int(0) ? Val_true : Val_false;
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}
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CAMLprim value caml_bytes_greaterequal(value s1, value s2)
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{
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return caml_string_greaterequal(s1,s2);
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}
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CAMLprim value caml_blit_bytes(value s1, value ofs1, value s2, value ofs2,
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value n)
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{
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memmove(&Byte(s2, Long_val(ofs2)), &Byte(s1, Long_val(ofs1)), Long_val(n));
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return Val_unit;
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}
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CAMLprim value caml_blit_string(value s1, value ofs1, value s2, value ofs2,
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value n)
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{
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return caml_blit_bytes (s1, ofs1, s2, ofs2, n);
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}
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CAMLprim value caml_fill_bytes(value s, value offset, value len, value init)
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{
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memset(&Byte(s, Long_val(offset)), Int_val(init), Long_val(len));
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return Val_unit;
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}
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/**
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* [caml_fill_string] is deprecated, use [caml_fill_bytes] instead
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*/
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CAMLprim value caml_fill_string(value s, value offset, value len, value init)
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{
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return caml_fill_bytes (s, offset, len, init);
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}
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CAMLexport value caml_alloc_sprintf(const char * format, ...)
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{
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va_list args;
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char buf[128];
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int n;
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value res;
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#if !defined(_WIN32) || defined(_UCRT)
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/* C99-compliant implementation */
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va_start(args, format);
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/* "vsnprintf(dest, sz, format, args)" writes at most "sz" characters
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into "dest", including the terminating '\0'.
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It returns the number of characters of the formatted string,
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excluding the terminating '\0'. */
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n = vsnprintf(buf, sizeof(buf), format, args);
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va_end(args);
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if (n < sizeof(buf)) {
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/* All output characters were written to buf, including the
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terminating '\0'. Allocate a Caml string with length "n"
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as computed by vsnprintf, and copy the output of vsnprintf into it. */
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res = caml_alloc_initialized_string(n, buf);
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} else {
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/* PR#7568: if the format is in the Caml heap, the following
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caml_alloc_string could move or free the format. To prevent
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this, take a copy of the format outside the Caml heap. */
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char * saved_format = caml_stat_strdup(format);
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/* Allocate a Caml string with length "n" as computed by vsnprintf. */
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res = caml_alloc_string(n);
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/* Re-do the formatting, outputting directly in the Caml string.
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Note that caml_alloc_string left room for a '\0' at position n,
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so the size passed to vsnprintf is n+1. */
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va_start(args, format);
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vsnprintf((char *)String_val(res), n + 1, saved_format, args);
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va_end(args);
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caml_stat_free(saved_format);
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}
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return res;
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#else
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/* Implementation specific to the Microsoft CRT library */
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va_start(args, format);
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/* "_vsnprintf(dest, sz, format, args)" writes at most "sz" characters
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into "dest". Let "len" be the number of characters of the formatted
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string.
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If "len" < "sz", a null terminator was appended, and "len" is returned.
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If "len" == "sz", no null termination, and "len" is returned.
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If "len" > "sz", a negative value is returned. */
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n = _vsnprintf(buf, sizeof(buf), format, args);
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va_end(args);
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if (n >= 0 && n <= sizeof(buf)) {
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/* All output characters were written to buf.
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"n" is the actual length of the output.
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Allocate a Caml string of length "n" and copy the characters into it. */
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res = caml_alloc_string(n);
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memcpy((char *)String_val(res), buf, n);
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} else {
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/* PR#7568: if the format is in the Caml heap, the following
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caml_alloc_string could move or free the format. To prevent
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this, take a copy of the format outside the Caml heap. */
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char * saved_format = caml_stat_strdup(format);
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/* Determine actual length of output, excluding final '\0' */
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va_start(args, format);
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n = _vscprintf(format, args);
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va_end(args);
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res = caml_alloc_string(n);
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/* Re-do the formatting, outputting directly in the Caml string.
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Note that caml_alloc_string left room for a '\0' at position n,
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so the size passed to _vsnprintf is n+1. */
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va_start(args, format);
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_vsnprintf((char *)String_val(res), n + 1, saved_format, args);
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va_end(args);
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caml_stat_free(saved_format);
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}
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return res;
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#endif
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}
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CAMLprim value caml_string_of_bytes(value bv)
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{
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return bv;
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}
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CAMLprim value caml_bytes_of_string(value bv)
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{
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return bv;
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}
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