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/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../LICENSE. */
/* */
/***********************************************************************/
/* Operations on strings */
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include "caml/alloc.h"
#include "caml/fail.h"
#include "caml/mlvalues.h"
#include "caml/misc.h"
#ifdef HAS_LOCALE
#include <locale.h>
#endif
CAMLexport mlsize_t caml_string_length(value s)
{
mlsize_t temp;
temp = Bosize_val(s) - 1;
Assert (Byte (s, temp - Byte (s, temp)) == 0);
return temp - Byte (s, temp);
}
CAMLprim value caml_ml_string_length(value s)
{
mlsize_t temp;
temp = Bosize_val(s) - 1;
Assert (Byte (s, temp - Byte (s, temp)) == 0);
return Val_long(temp - Byte (s, temp));
}
CAMLprim value caml_create_string(value len)
{
mlsize_t size = Long_val(len);
if (size > Bsize_wsize (Max_wosize) - 1){
caml_invalid_argument("String.create");
}
return caml_alloc_string(size);
}
CAMLprim value caml_string_get(value str, value index)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= caml_string_length(str)) caml_array_bound_error();
return Val_int(Byte_u(str, idx));
}
CAMLprim value caml_string_set(value str, value index, value newval)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= caml_string_length(str)) caml_array_bound_error();
Byte_u(str, idx) = Int_val(newval);
return Val_unit;
}
CAMLprim value caml_string_get16(value str, value index)
{
intnat res;
unsigned char b1, b2;
intnat idx = Long_val(index);
if (idx < 0 || idx + 1 >= caml_string_length(str)) caml_array_bound_error();
b1 = Byte_u(str, idx);
b2 = Byte_u(str, idx + 1);
#ifdef ARCH_BIG_ENDIAN
res = b1 << 8 | b2;
#else
res = b2 << 8 | b1;
#endif
return Val_int(res);
}
CAMLprim value caml_string_get32(value str, value index)
{
intnat res;
unsigned char b1, b2, b3, b4;
intnat idx = Long_val(index);
if (idx < 0 || idx + 3 >= caml_string_length(str)) caml_array_bound_error();
b1 = Byte_u(str, idx);
b2 = Byte_u(str, idx + 1);
b3 = Byte_u(str, idx + 2);
b4 = Byte_u(str, idx + 3);
#ifdef ARCH_BIG_ENDIAN
res = b1 << 24 | b2 << 16 | b3 << 8 | b4;
#else
res = b4 << 24 | b3 << 16 | b2 << 8 | b1;
#endif
return caml_copy_int32(res);
}
CAMLprim value caml_string_get64(value str, value index)
{
uint64 res;
unsigned char b1, b2, b3, b4, b5, b6, b7, b8;
intnat idx = Long_val(index);
if (idx < 0 || idx + 7 >= caml_string_length(str)) caml_array_bound_error();
b1 = Byte_u(str, idx);
b2 = Byte_u(str, idx + 1);
b3 = Byte_u(str, idx + 2);
b4 = Byte_u(str, idx + 3);
b5 = Byte_u(str, idx + 4);
b6 = Byte_u(str, idx + 5);
b7 = Byte_u(str, idx + 6);
b8 = Byte_u(str, idx + 7);
#ifdef ARCH_BIG_ENDIAN
res = (uint64) b1 << 56 | (uint64) b2 << 48
| (uint64) b3 << 40 | (uint64) b4 << 32
| (uint64) b5 << 24 | (uint64) b6 << 16
| (uint64) b7 << 8 | (uint64) b8;
#else
res = (uint64) b8 << 56 | (uint64) b7 << 48
| (uint64) b6 << 40 | (uint64) b5 << 32
| (uint64) b4 << 24 | (uint64) b3 << 16
| (uint64) b2 << 8 | (uint64) b1;
#endif
return caml_copy_int64(res);
}
CAMLprim value caml_string_set16(value str, value index, value newval)
{
unsigned char b1, b2;
intnat val;
intnat idx = Long_val(index);
if (idx < 0 || idx + 1 >= caml_string_length(str)) caml_array_bound_error();
val = Long_val(newval);
#ifdef ARCH_BIG_ENDIAN
b1 = 0xFF & val >> 8;
b2 = 0xFF & val;
#else
b2 = 0xFF & val >> 8;
b1 = 0xFF & val;
#endif
Byte_u(str, idx) = b1;
Byte_u(str, idx + 1) = b2;
return Val_unit;
}
CAMLprim value caml_string_set32(value str, value index, value newval)
{
unsigned char b1, b2, b3, b4;
intnat val;
intnat idx = Long_val(index);
if (idx < 0 || idx + 3 >= caml_string_length(str)) caml_array_bound_error();
val = Int32_val(newval);
#ifdef ARCH_BIG_ENDIAN
b1 = 0xFF & val >> 24;
b2 = 0xFF & val >> 16;
b3 = 0xFF & val >> 8;
b4 = 0xFF & val;
#else
b4 = 0xFF & val >> 24;
b3 = 0xFF & val >> 16;
b2 = 0xFF & val >> 8;
b1 = 0xFF & val;
#endif
Byte_u(str, idx) = b1;
Byte_u(str, idx + 1) = b2;
Byte_u(str, idx + 2) = b3;
Byte_u(str, idx + 3) = b4;
return Val_unit;
}
CAMLprim value caml_string_set64(value str, value index, value newval)
{
unsigned char b1, b2, b3, b4, b5, b6, b7, b8;
int64 val;
intnat idx = Long_val(index);
if (idx < 0 || idx + 7 >= caml_string_length(str)) caml_array_bound_error();
val = Int64_val(newval);
#ifdef ARCH_BIG_ENDIAN
b1 = 0xFF & val >> 56;
b2 = 0xFF & val >> 48;
b3 = 0xFF & val >> 40;
b4 = 0xFF & val >> 32;
b5 = 0xFF & val >> 24;
b6 = 0xFF & val >> 16;
b7 = 0xFF & val >> 8;
b8 = 0xFF & val;
#else
b8 = 0xFF & val >> 56;
b7 = 0xFF & val >> 48;
b6 = 0xFF & val >> 40;
b5 = 0xFF & val >> 32;
b4 = 0xFF & val >> 24;
b3 = 0xFF & val >> 16;
b2 = 0xFF & val >> 8;
b1 = 0xFF & val;
#endif
Byte_u(str, idx) = b1;
Byte_u(str, idx + 1) = b2;
Byte_u(str, idx + 2) = b3;
Byte_u(str, idx + 3) = b4;
Byte_u(str, idx + 4) = b5;
Byte_u(str, idx + 5) = b6;
Byte_u(str, idx + 6) = b7;
Byte_u(str, idx + 7) = b8;
return Val_unit;
}
CAMLprim value caml_string_equal(value s1, value s2)
{
mlsize_t sz1, sz2;
value * p1, * p2;
if (s1 == s2) return Val_true;
sz1 = Wosize_val(s1);
sz2 = Wosize_val(s2);
if (sz1 != sz2) return Val_false;
for(p1 = Op_val(s1), p2 = Op_val(s2); sz1 > 0; sz1--, p1++, p2++)
if (*p1 != *p2) return Val_false;
return Val_true;
}
CAMLprim value caml_string_notequal(value s1, value s2)
{
return Val_not(caml_string_equal(s1, s2));
}
CAMLprim value caml_string_compare(value s1, value s2)
{
mlsize_t len1, len2;
int res;
if (s1 == s2) return Val_int(0);
len1 = caml_string_length(s1);
len2 = caml_string_length(s2);
res = memcmp(String_val(s1), String_val(s2), len1 <= len2 ? len1 : len2);
if (res < 0) return Val_int(-1);
if (res > 0) return Val_int(1);
if (len1 < len2) return Val_int(-1);
if (len1 > len2) return Val_int(1);
return Val_int(0);
}
CAMLprim value caml_string_lessthan(value s1, value s2)
{
return caml_string_compare(s1, s2) < Val_int(0) ? Val_true : Val_false;
}
CAMLprim value caml_string_lessequal(value s1, value s2)
{
return caml_string_compare(s1, s2) <= Val_int(0) ? Val_true : Val_false;
}
CAMLprim value caml_string_greaterthan(value s1, value s2)
{
return caml_string_compare(s1, s2) > Val_int(0) ? Val_true : Val_false;
}
CAMLprim value caml_string_greaterequal(value s1, value s2)
{
return caml_string_compare(s1, s2) >= Val_int(0) ? Val_true : Val_false;
}
CAMLprim value caml_blit_string(value s1, value ofs1, value s2, value ofs2,
value n)
{
memmove(&Byte(s2, Long_val(ofs2)), &Byte(s1, Long_val(ofs1)), Long_val(n));
return Val_unit;
}
CAMLprim value caml_fill_string(value s, value offset, value len, value init)
{
memset(&Byte(s, Long_val(offset)), Int_val(init), Long_val(len));
return Val_unit;
}
CAMLprim value caml_is_printable(value chr)
{
int c;
#ifdef HAS_LOCALE
static int locale_is_set = 0;
if (! locale_is_set) {
setlocale(LC_CTYPE, "");
locale_is_set = 1;
}
#endif
c = Int_val(chr);
return Val_bool(isprint(c));
}
CAMLprim value caml_bitvect_test(value bv, value n)
{
intnat pos = Long_val(n);
return Val_int(Byte_u(bv, pos >> 3) & (1 << (pos & 7)));
}
CAMLexport value caml_alloc_sprintf(const char * format, ...)
{
va_list args;
char buf[64];
int n;
value res;
#ifndef _WIN32
/* C99-compliant implementation */
va_start(args, format);
/* "vsnprintf(dest, sz, format, args)" writes at most "sz" characters
into "dest", including the terminating '\0'.
It returns the number of characters of the formatted string,
excluding the terminating '\0'. */
n = vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
/* Allocate a Caml string with length "n" as computed by vsnprintf. */
res = caml_alloc_string(n);
if (n < sizeof(buf)) {
/* All output characters were written to buf, including the
terminating '\0'. Just copy them to the result. */
memcpy(String_val(res), buf, n);
} else {
/* Re-do the formatting, outputting directly in the Caml string.
Note that caml_alloc_string left room for a '\0' at position n,
so the size passed to vsnprintf is n+1. */
va_start(args, format);
vsnprintf(String_val(res), n + 1, format, args);
va_end(args);
}
return res;
#else
/* Implementation specific to the Microsoft CRT library */
va_start(args, format);
/* "_vsnprintf(dest, sz, format, args)" writes at most "sz" characters
into "dest". Let "len" be the number of characters of the formatted
string.
If "len" < "sz", a null terminator was appended, and "len" is returned.
If "len" == "sz", no null termination, and "len" is returned.
If "len" > "sz", a negative value is returned. */
n = _vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
if (n >= 0 && n <= sizeof(buf)) {
/* All output characters were written to buf.
"n" is the actual length of the output.
Copy the characters to a Caml string of length n. */
res = caml_alloc_string(n);
memcpy(String_val(res), buf, n);
} else {
/* Determine actual length of output, excluding final '\0' */
va_start(args, format);
n = _vscprintf(format, args);
va_end(args);
res = caml_alloc_string(n);
/* Re-do the formatting, outputting directly in the Caml string.
Note that caml_alloc_string left room for a '\0' at position n,
so the size passed to _vsnprintf is n+1. */
va_start(args, format);
_vsnprintf(String_val(res), n + 1, format, args);
va_end(args);
}
return res;
#endif
}
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