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ruby--ruby/pack.c
matz 88d5dcc8de * exception error messages updated. [ruby-core:04497] 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@8035 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2005-02-28 02:45:23 +00:00

2106 lines
51 KiB
C
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/**********************************************************************
pack.c -
$Author$
$Date$
created at: Thu Feb 10 15:17:05 JST 1994
Copyright (C) 1993-2003 Yukihiro Matsumoto
**********************************************************************/
#include "ruby.h"
#include <sys/types.h>
#include <ctype.h>
#define SIZE16 2
#define SIZE32 4
#if SIZEOF_SHORT != 2 || SIZEOF_LONG != 4
# define NATINT_PACK
#endif
#ifdef NATINT_PACK
# define OFF16B(p) ((char*)(p) + (natint?0:(sizeof(short) - SIZE16)))
# define OFF32B(p) ((char*)(p) + (natint?0:(sizeof(long) - SIZE32)))
# define NATINT_LEN(type,len) (natint?sizeof(type):(len))
# ifdef WORDS_BIGENDIAN
# define OFF16(p) OFF16B(p)
# define OFF32(p) OFF32B(p)
# endif
# define NATINT_HTOVS(x) (natint?htovs(x):htov16(x))
# define NATINT_HTOVL(x) (natint?htovl(x):htov32(x))
# define NATINT_HTONS(x) (natint?htons(x):hton16(x))
# define NATINT_HTONL(x) (natint?htonl(x):hton32(x))
#else
# define NATINT_LEN(type,len) sizeof(type)
# define NATINT_HTOVS(x) htovs(x)
# define NATINT_HTOVL(x) htovl(x)
# define NATINT_HTONS(x) htons(x)
# define NATINT_HTONL(x) htonl(x)
#endif
#ifndef OFF16
# define OFF16(p) (char*)(p)
# define OFF32(p) (char*)(p)
#endif
#ifndef OFF16B
# define OFF16B(p) (char*)(p)
# define OFF32B(p) (char*)(p)
#endif
#define define_swapx(x, xtype) \
static xtype \
TOKEN_PASTE(swap,x)(z) \
xtype z; \
{ \
xtype r; \
xtype *zp; \
unsigned char *s, *t; \
int i; \
\
zp = malloc(sizeof(xtype)); \
*zp = z; \
s = (unsigned char*)zp; \
t = malloc(sizeof(xtype)); \
for (i=0; i<sizeof(xtype); i++) { \
t[sizeof(xtype)-i-1] = s[i]; \
} \
r = *(xtype *)t; \
free(t); \
free(zp); \
return r; \
}
#ifndef swap16
#define swap16(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF))
#endif
#if SIZEOF_SHORT == 2
#define swaps(x) swap16(x)
#else
#if SIZEOF_SHORT == 4
#define swaps(x) ((((x)&0xFF)<<24) \
|(((x)>>24)&0xFF) \
|(((x)&0x0000FF00)<<8) \
|(((x)&0x00FF0000)>>8) )
#else
define_swapx(s,short)
#endif
#endif
#ifndef swap32
#define swap32(x) ((((x)&0xFF)<<24) \
|(((x)>>24)&0xFF) \
|(((x)&0x0000FF00)<<8) \
|(((x)&0x00FF0000)>>8) )
#endif
#if SIZEOF_LONG == 4
#define swapl(x) swap32(x)
#else
#if SIZEOF_LONG == 8
#define swapl(x) ((((x)&0x00000000000000FF)<<56) \
|(((x)&0xFF00000000000000)>>56) \
|(((x)&0x000000000000FF00)<<40) \
|(((x)&0x00FF000000000000)>>40) \
|(((x)&0x0000000000FF0000)<<24) \
|(((x)&0x0000FF0000000000)>>24) \
|(((x)&0x00000000FF000000)<<8) \
|(((x)&0x000000FF00000000)>>8))
#else
define_swapx(l,long)
#endif
#endif
#if SIZEOF_FLOAT == 4
#if SIZEOF_LONG == 4 /* SIZEOF_FLOAT == 4 == SIZEOF_LONG */
#define swapf(x) swapl(x)
#define FLOAT_SWAPPER unsigned long
#else
#if SIZEOF_SHORT == 4 /* SIZEOF_FLOAT == 4 == SIZEOF_SHORT */
#define swapf(x) swaps(x)
#define FLOAT_SWAPPER unsigned short
#else /* SIZEOF_FLOAT == 4 but undivide by known size of int */
define_swapx(f,float)
#endif /* #if SIZEOF_SHORT == 4 */
#endif /* #if SIZEOF_LONG == 4 */
#else /* SIZEOF_FLOAT != 4 */
define_swapx(f,float)
#endif /* #if SIZEOF_FLOAT == 4 */
#if SIZEOF_DOUBLE == 8
#if SIZEOF_LONG == 8 /* SIZEOF_DOUBLE == 8 == SIZEOF_LONG */
#define swapd(x) swapl(x)
#define DOUBLE_SWAPPER unsigned long
#else
#if SIZEOF_LONG == 4 /* SIZEOF_DOUBLE == 8 && 4 == SIZEOF_LONG */
static double
swapd(d)
const double d;
{
double dtmp = d;
unsigned long utmp[2];
unsigned long utmp0;
utmp[0] = 0; utmp[1] = 0;
memcpy(utmp,&dtmp,sizeof(double));
utmp0 = utmp[0];
utmp[0] = swapl(utmp[1]);
utmp[1] = swapl(utmp0);
memcpy(&dtmp,utmp,sizeof(double));
return dtmp;
}
#else
#if SIZEOF_SHORT == 4 /* SIZEOF_DOUBLE == 8 && 4 == SIZEOF_SHORT */
static double
swapd(d)
const double d;
{
double dtmp = d;
unsigned short utmp[2];
unsigned short utmp0;
utmp[0] = 0; utmp[1] = 0;
memcpy(utmp,&dtmp,sizeof(double));
utmp0 = utmp[0];
utmp[0] = swaps(utmp[1]);
utmp[1] = swaps(utmp0);
memcpy(&dtmp,utmp,sizeof(double));
return dtmp;
}
#else /* SIZEOF_DOUBLE == 8 but undivied by known size of int */
define_swapx(d, double)
#endif /* #if SIZEOF_SHORT == 4 */
#endif /* #if SIZEOF_LONG == 4 */
#endif /* #if SIZEOF_LONG == 8 */
#else /* SIZEOF_DOUBLE != 8 */
define_swapx(d, double)
#endif /* #if SIZEOF_DOUBLE == 8 */
#undef define_swapx
#ifdef DYNAMIC_ENDIAN
#ifdef ntohs
#undef ntohs
#undef ntohl
#undef htons
#undef htonl
#endif
static int
endian()
{
static int init = 0;
static int endian_value;
char *p;
if (init) return endian_value;
init = 1;
p = (char*)&init;
return endian_value = p[0]?0:1;
}
#define ntohs(x) (endian()?(x):swaps(x))
#define ntohl(x) (endian()?(x):swapl(x))
#define ntohf(x) (endian()?(x):swapf(x))
#define ntohd(x) (endian()?(x):swapd(x))
#define htons(x) (endian()?(x):swaps(x))
#define htonl(x) (endian()?(x):swapl(x))
#define htonf(x) (endian()?(x):swapf(x))
#define htond(x) (endian()?(x):swapd(x))
#define htovs(x) (endian()?swaps(x):(x))
#define htovl(x) (endian()?swapl(x):(x))
#define htovf(x) (endian()?swapf(x):(x))
#define htovd(x) (endian()?swapd(x):(x))
#define vtohs(x) (endian()?swaps(x):(x))
#define vtohl(x) (endian()?swapl(x):(x))
#define vtohf(x) (endian()?swapf(x):(x))
#define vtohd(x) (endian()?swapd(x):(x))
# ifdef NATINT_PACK
#define htov16(x) (endian()?swap16(x):(x))
#define htov32(x) (endian()?swap32(x):(x))
#define hton16(x) (endian()?(x):swap16(x))
#define hton32(x) (endian()?(x):swap32(x))
# endif
#else
#ifdef WORDS_BIGENDIAN
#ifndef ntohs
#define ntohs(x) (x)
#define ntohl(x) (x)
#define htons(x) (x)
#define htonl(x) (x)
#endif
#define ntohf(x) (x)
#define ntohd(x) (x)
#define htonf(x) (x)
#define htond(x) (x)
#define htovs(x) swaps(x)
#define htovl(x) swapl(x)
#define htovf(x) swapf(x)
#define htovd(x) swapd(x)
#define vtohs(x) swaps(x)
#define vtohl(x) swapl(x)
#define vtohf(x) swapf(x)
#define vtohd(x) swapd(x)
# ifdef NATINT_PACK
#define htov16(x) swap16(x)
#define htov32(x) swap32(x)
#define hton16(x) (x)
#define hton32(x) (x)
# endif
#else /* LITTLE ENDIAN */
#ifdef ntohs
#undef ntohs
#undef ntohl
#undef htons
#undef htonl
#endif
#define ntohs(x) swaps(x)
#define ntohl(x) swapl(x)
#define htons(x) swaps(x)
#define htonl(x) swapl(x)
#define ntohf(x) swapf(x)
#define ntohd(x) swapd(x)
#define htonf(x) swapf(x)
#define htond(x) swapd(x)
#define htovs(x) (x)
#define htovl(x) (x)
#define htovf(x) (x)
#define htovd(x) (x)
#define vtohs(x) (x)
#define vtohl(x) (x)
#define vtohf(x) (x)
#define vtohd(x) (x)
# ifdef NATINT_PACK
#define htov16(x) (x)
#define htov32(x) (x)
#define hton16(x) swap16(x)
#define hton32(x) swap32(x)
# endif
#endif
#endif
#ifdef FLOAT_SWAPPER
#define FLOAT_CONVWITH(y) FLOAT_SWAPPER y;
#define HTONF(x,y) (memcpy(&y,&x,sizeof(float)), \
y = htonf((FLOAT_SWAPPER)y), \
memcpy(&x,&y,sizeof(float)), \
x)
#define HTOVF(x,y) (memcpy(&y,&x,sizeof(float)), \
y = htovf((FLOAT_SWAPPER)y), \
memcpy(&x,&y,sizeof(float)), \
x)
#define NTOHF(x,y) (memcpy(&y,&x,sizeof(float)), \
y = ntohf((FLOAT_SWAPPER)y), \
memcpy(&x,&y,sizeof(float)), \
x)
#define VTOHF(x,y) (memcpy(&y,&x,sizeof(float)), \
y = vtohf((FLOAT_SWAPPER)y), \
memcpy(&x,&y,sizeof(float)), \
x)
#else
#define FLOAT_CONVWITH(y)
#define HTONF(x,y) htonf(x)
#define HTOVF(x,y) htovf(x)
#define NTOHF(x,y) ntohf(x)
#define VTOHF(x,y) vtohf(x)
#endif
#ifdef DOUBLE_SWAPPER
#define DOUBLE_CONVWITH(y) DOUBLE_SWAPPER y;
#define HTOND(x,y) (memcpy(&y,&x,sizeof(double)), \
y = htond((DOUBLE_SWAPPER)y), \
memcpy(&x,&y,sizeof(double)), \
x)
#define HTOVD(x,y) (memcpy(&y,&x,sizeof(double)), \
y = htovd((DOUBLE_SWAPPER)y), \
memcpy(&x,&y,sizeof(double)), \
x)
#define NTOHD(x,y) (memcpy(&y,&x,sizeof(double)), \
y = ntohd((DOUBLE_SWAPPER)y), \
memcpy(&x,&y,sizeof(double)), \
x)
#define VTOHD(x,y) (memcpy(&y,&x,sizeof(double)), \
y = vtohd((DOUBLE_SWAPPER)y), \
memcpy(&x,&y,sizeof(double)), \
x)
#else
#define DOUBLE_CONVWITH(y)
#define HTOND(x,y) htond(x)
#define HTOVD(x,y) htovd(x)
#define NTOHD(x,y) ntohd(x)
#define VTOHD(x,y) vtohd(x)
#endif
unsigned long rb_big2ulong_pack _((VALUE x));
static unsigned long
num2i32(x)
VALUE x;
{
x = rb_to_int(x); /* is nil OK? (should not) */
if (FIXNUM_P(x)) return FIX2LONG(x);
if (TYPE(x) == T_BIGNUM) {
return rb_big2ulong_pack(x);
}
rb_raise(rb_eTypeError, "can't convert %s to `integer'", rb_obj_classname(x));
return 0; /* not reached */
}
#if SIZEOF_LONG == SIZE32 || SIZEOF_INT == SIZE32
# define EXTEND32(x)
#else
/* invariant in modulo 1<<31 */
# define EXTEND32(x) do {if (!natint) {(x) = (I32)(((1<<31)-1-(x))^~(~0<<31))}} while(0)
#endif
#if SIZEOF_SHORT == SIZE16
# define EXTEND16(x)
#else
# define EXTEND16(x) do { if (!natint) {(x) = (short)(((1<<15)-1-(x))^~(~0<<15))}} while(0)
#endif
#ifdef HAVE_LONG_LONG
# define QUAD_SIZE sizeof(LONG_LONG)
#else
# define QUAD_SIZE 8
#endif
static char *toofew = "too few arguments";
static void encodes _((VALUE,char*,long,int));
static void qpencode _((VALUE,VALUE,long));
static int uv_to_utf8 _((char*,unsigned long));
static unsigned long utf8_to_uv _((char*,long*));
/*
* call-seq:
* arr.pack ( aTemplateString ) -> aBinaryString
*
* Packs the contents of <i>arr</i> into a binary sequence according to
* the directives in <i>aTemplateString</i> (see the table below)
* Directives ``A,'' ``a,'' and ``Z'' may be followed by a count,
* which gives the width of the resulting field. The remaining
* directives also may take a count, indicating the number of array
* elements to convert. If the count is an asterisk
* (``<code>*</code>''), all remaining array elements will be
* converted. Any of the directives ``<code>sSiIlL</code>'' may be
* followed by an underscore (``<code>_</code>'') to use the underlying
* platform's native size for the specified type; otherwise, they use a
* platform-independent size. Spaces are ignored in the template
* string. See also <code>String#unpack</code>.
*
* a = [ "a", "b", "c" ]
* n = [ 65, 66, 67 ]
* a.pack("A3A3A3") #=> "a b c "
* a.pack("a3a3a3") #=> "a\000\000b\000\000c\000\000"
* n.pack("ccc") #=> "ABC"
*
* Directives for +pack+.
*
* Directive Meaning
* ---------------------------------------------------------------
* @ | Moves to absolute position
* A | ASCII string (space padded, count is width)
* a | ASCII string (null padded, count is width)
* B | Bit string (descending bit order)
* b | Bit string (ascending bit order)
* C | Unsigned char
* c | Char
* D, d | Double-precision float, native format
* E | Double-precision float, little-endian byte order
* e | Single-precision float, little-endian byte order
* F, f | Single-precision float, native format
* G | Double-precision float, network (big-endian) byte order
* g | Single-precision float, network (big-endian) byte order
* H | Hex string (high nibble first)
* h | Hex string (low nibble first)
* I | Unsigned integer
* i | Integer
* L | Unsigned long
* l | Long
* M | Quoted printable, MIME encoding (see RFC2045)
* m | Base64 encoded string
* N | Long, network (big-endian) byte order
* n | Short, network (big-endian) byte-order
* P | Pointer to a structure (fixed-length string)
* p | Pointer to a null-terminated string
* Q, q | 64-bit number
* S | Unsigned short
* s | Short
* U | UTF-8
* u | UU-encoded string
* V | Long, little-endian byte order
* v | Short, little-endian byte order
* w | BER-compressed integer\fnm
* X | Back up a byte
* x | Null byte
* Z | Same as ``a'', except that null is added with *
*/
static VALUE
pack_pack(ary, fmt)
VALUE ary, fmt;
{
static char *nul10 = "\0\0\0\0\0\0\0\0\0\0";
static char *spc10 = " ";
char *p, *pend;
VALUE res, from, associates = 0;
char type;
long items, len, idx, plen;
char *ptr;
#ifdef NATINT_PACK
int natint; /* native integer */
#endif
StringValue(fmt);
p = RSTRING(fmt)->ptr;
pend = p + RSTRING(fmt)->len;
res = rb_str_buf_new(0);
items = RARRAY(ary)->len;
idx = 0;
#define THISFROM RARRAY(ary)->ptr[idx]
#define NEXTFROM (items-- > 0 ? RARRAY(ary)->ptr[idx++] : (rb_raise(rb_eArgError, toofew),0))
while (p < pend) {
if (RSTRING(fmt)->ptr + RSTRING(fmt)->len != pend) {
rb_raise(rb_eRuntimeError, "format string modified");
}
type = *p++; /* get data type */
#ifdef NATINT_PACK
natint = 0;
#endif
if (ISSPACE(type)) continue;
if (type == '#') {
while ((p < pend) && (*p != '\n')) {
p++;
}
continue;
}
if (*p == '_' || *p == '!') {
const char *natstr = "sSiIlL";
if (strchr(natstr, type)) {
#ifdef NATINT_PACK
natint = 1;
#endif
p++;
}
else {
rb_raise(rb_eArgError, "'%c' allowed only after types %s", *p, natstr);
}
}
if (*p == '*') { /* set data length */
len = strchr("@Xxu", type) ? 0 : items;
p++;
}
else if (ISDIGIT(*p)) {
len = strtoul(p, (char**)&p, 10);
}
else {
len = 1;
}
switch (type) {
case 'A': case 'a': case 'Z':
case 'B': case 'b':
case 'H': case 'h':
from = NEXTFROM;
if (NIL_P(from)) {
ptr = "";
plen = 0;
}
else {
StringValue(from);
ptr = RSTRING(from)->ptr;
plen = RSTRING(from)->len;
OBJ_INFECT(res, from);
}
if (p[-1] == '*')
len = plen;
switch (type) {
case 'a': /* arbitrary binary string (null padded) */
case 'A': /* ASCII string (space padded) */
case 'Z': /* null terminated ASCII string */
if (plen >= len) {
rb_str_buf_cat(res, ptr, len);
if (p[-1] == '*' && type == 'Z')
rb_str_buf_cat(res, nul10, 1);
}
else {
rb_str_buf_cat(res, ptr, plen);
len -= plen;
while (len >= 10) {
rb_str_buf_cat(res, (type == 'A')?spc10:nul10, 10);
len -= 10;
}
rb_str_buf_cat(res, (type == 'A')?spc10:nul10, len);
}
break;
case 'b': /* bit string (ascending) */
{
int byte = 0;
long i, j = 0;
if (len > plen) {
j = (len - plen + 1)/2;
len = plen;
}
for (i=0; i++ < len; ptr++) {
if (*ptr & 1)
byte |= 128;
if (i & 7)
byte >>= 1;
else {
char c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
byte = 0;
}
}
if (len & 7) {
char c;
byte >>= 7 - (len & 7);
c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
}
len = j;
goto grow;
}
break;
case 'B': /* bit string (descending) */
{
int byte = 0;
long i, j = 0;
if (len > plen) {
j = (len - plen + 1)/2;
len = plen;
}
for (i=0; i++ < len; ptr++) {
byte |= *ptr & 1;
if (i & 7)
byte <<= 1;
else {
char c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
byte = 0;
}
}
if (len & 7) {
char c;
byte <<= 7 - (len & 7);
c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
}
len = j;
goto grow;
}
break;
case 'h': /* hex string (low nibble first) */
{
int byte = 0;
long i, j = 0;
if (len > plen) {
j = (len - plen + 1)/2;
len = plen;
}
for (i=0; i++ < len; ptr++) {
if (ISALPHA(*ptr))
byte |= (((*ptr & 15) + 9) & 15) << 4;
else
byte |= (*ptr & 15) << 4;
if (i & 1)
byte >>= 4;
else {
char c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
byte = 0;
}
}
if (len & 1) {
char c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
}
len = j;
goto grow;
}
break;
case 'H': /* hex string (high nibble first) */
{
int byte = 0;
long i, j = 0;
if (len > plen) {
j = (len - plen + 1)/2;
len = plen;
}
for (i=0; i++ < len; ptr++) {
if (ISALPHA(*ptr))
byte |= ((*ptr & 15) + 9) & 15;
else
byte |= *ptr & 15;
if (i & 1)
byte <<= 4;
else {
char c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
byte = 0;
}
}
if (len & 1) {
char c = byte & 0xff;
rb_str_buf_cat(res, &c, 1);
}
len = j;
goto grow;
}
break;
}
break;
case 'c': /* signed char */
case 'C': /* unsigned char */
while (len-- > 0) {
char c;
from = NEXTFROM;
c = num2i32(from);
rb_str_buf_cat(res, &c, sizeof(char));
}
break;
case 's': /* signed short */
case 'S': /* unsigned short */
while (len-- > 0) {
short s;
from = NEXTFROM;
s = num2i32(from);
rb_str_buf_cat(res, OFF16(&s), NATINT_LEN(short,2));
}
break;
case 'i': /* signed int */
case 'I': /* unsigned int */
while (len-- > 0) {
long i;
from = NEXTFROM;
i = num2i32(from);
rb_str_buf_cat(res, OFF32(&i), NATINT_LEN(int,4));
}
break;
case 'l': /* signed long */
case 'L': /* unsigned long */
while (len-- > 0) {
long l;
from = NEXTFROM;
l = num2i32(from);
rb_str_buf_cat(res, OFF32(&l), NATINT_LEN(long,4));
}
break;
case 'q': /* signed quad (64bit) int */
case 'Q': /* unsigned quad (64bit) int */
while (len-- > 0) {
char tmp[QUAD_SIZE];
from = NEXTFROM;
rb_quad_pack(tmp, from);
rb_str_buf_cat(res, (char*)&tmp, QUAD_SIZE);
}
break;
case 'n': /* unsigned short (network byte-order) */
while (len-- > 0) {
unsigned short s;
from = NEXTFROM;
s = num2i32(from);
s = NATINT_HTONS(s);
rb_str_buf_cat(res, OFF16(&s), NATINT_LEN(short,2));
}
break;
case 'N': /* unsigned long (network byte-order) */
while (len-- > 0) {
unsigned long l;
from = NEXTFROM;
l = num2i32(from);
l = NATINT_HTONL(l);
rb_str_buf_cat(res, OFF32(&l), NATINT_LEN(long,4));
}
break;
case 'v': /* unsigned short (VAX byte-order) */
while (len-- > 0) {
unsigned short s;
from = NEXTFROM;
s = num2i32(from);
s = NATINT_HTOVS(s);
rb_str_buf_cat(res, OFF16(&s), NATINT_LEN(short,2));
}
break;
case 'V': /* unsigned long (VAX byte-order) */
while (len-- > 0) {
unsigned long l;
from = NEXTFROM;
l = num2i32(from);
l = NATINT_HTOVL(l);
rb_str_buf_cat(res, OFF32(&l), NATINT_LEN(long,4));
}
break;
case 'f': /* single precision float in native format */
case 'F': /* ditto */
while (len-- > 0) {
float f;
from = NEXTFROM;
f = RFLOAT(rb_Float(from))->value;
rb_str_buf_cat(res, (char*)&f, sizeof(float));
}
break;
case 'e': /* single precision float in VAX byte-order */
while (len-- > 0) {
float f;
FLOAT_CONVWITH(ftmp);
from = NEXTFROM;
f = RFLOAT(rb_Float(from))->value;
f = HTOVF(f,ftmp);
rb_str_buf_cat(res, (char*)&f, sizeof(float));
}
break;
case 'E': /* double precision float in VAX byte-order */
while (len-- > 0) {
double d;
DOUBLE_CONVWITH(dtmp);
from = NEXTFROM;
d = RFLOAT(rb_Float(from))->value;
d = HTOVD(d,dtmp);
rb_str_buf_cat(res, (char*)&d, sizeof(double));
}
break;
case 'd': /* double precision float in native format */
case 'D': /* ditto */
while (len-- > 0) {
double d;
from = NEXTFROM;
d = RFLOAT(rb_Float(from))->value;
rb_str_buf_cat(res, (char*)&d, sizeof(double));
}
break;
case 'g': /* single precision float in network byte-order */
while (len-- > 0) {
float f;
FLOAT_CONVWITH(ftmp);
from = NEXTFROM;
f = RFLOAT(rb_Float(from))->value;
f = HTONF(f,ftmp);
rb_str_buf_cat(res, (char*)&f, sizeof(float));
}
break;
case 'G': /* double precision float in network byte-order */
while (len-- > 0) {
double d;
DOUBLE_CONVWITH(dtmp);
from = NEXTFROM;
d = RFLOAT(rb_Float(from))->value;
d = HTOND(d,dtmp);
rb_str_buf_cat(res, (char*)&d, sizeof(double));
}
break;
case 'x': /* null byte */
grow:
while (len >= 10) {
rb_str_buf_cat(res, nul10, 10);
len -= 10;
}
rb_str_buf_cat(res, nul10, len);
break;
case 'X': /* back up byte */
shrink:
plen = RSTRING(res)->len;
if (plen < len)
rb_raise(rb_eArgError, "X outside of string");
RSTRING(res)->len = plen - len;
RSTRING(res)->ptr[plen - len] = '\0';
break;
case '@': /* null fill to absolute position */
len -= RSTRING(res)->len;
if (len > 0) goto grow;
len = -len;
if (len > 0) goto shrink;
break;
case '%':
rb_raise(rb_eArgError, "%% is not supported");
break;
case 'U': /* Unicode character */
while (len-- > 0) {
long l;
char buf[8];
int le;
from = NEXTFROM;
from = rb_to_int(from);
l = NUM2INT(from);
if (l < 0) {
rb_raise(rb_eRangeError, "pack(U): value out of range");
}
le = uv_to_utf8(buf, l);
rb_str_buf_cat(res, (char*)buf, le);
}
break;
case 'u': /* uuencoded string */
case 'm': /* base64 encoded string */
from = NEXTFROM;
StringValue(from);
ptr = RSTRING(from)->ptr;
plen = RSTRING(from)->len;
if (len <= 2)
len = 45;
else
len = len / 3 * 3;
while (plen > 0) {
long todo;
if (plen > len)
todo = len;
else
todo = plen;
encodes(res, ptr, todo, type);
plen -= todo;
ptr += todo;
}
break;
case 'M': /* quoted-printable encoded string */
from = rb_obj_as_string(NEXTFROM);
if (len <= 1)
len = 72;
qpencode(res, from, len);
break;
case 'P': /* pointer to packed byte string */
from = THISFROM;
if (!NIL_P(from)) {
StringValue(from);
if (RSTRING(from)->len < len) {
rb_raise(rb_eArgError, "too short buffer for P(%ld for %ld)",
RSTRING(from)->len, len);
}
}
len = 1;
/* FALL THROUGH */
case 'p': /* pointer to string */
while (len-- > 0) {
char *t;
from = NEXTFROM;
if (NIL_P(from)) {
t = 0;
}
else {
t = StringValuePtr(from);
}
if (!associates) {
associates = rb_ary_new();
}
rb_ary_push(associates, from);
rb_str_buf_cat(res, (char*)&t, sizeof(char*));
}
break;
case 'w': /* BER compressed integer */
while (len-- > 0) {
unsigned long ul;
VALUE buf = rb_str_new(0, 0);
char c, *bufs, *bufe;
from = NEXTFROM;
if (TYPE(from) == T_BIGNUM) {
VALUE big128 = rb_uint2big(128);
while (TYPE(from) == T_BIGNUM) {
from = rb_big_divmod(from, big128);
c = NUM2INT(RARRAY(from)->ptr[1]) | 0x80; /* mod */
rb_str_buf_cat(buf, &c, sizeof(char));
from = RARRAY(from)->ptr[0]; /* div */
}
}
{
long l = NUM2LONG(from);
if (l < 0) {
rb_raise(rb_eArgError, "can't compress negative numbers");
}
ul = l;
}
while (ul) {
c = ((ul & 0x7f) | 0x80);
rb_str_buf_cat(buf, &c, sizeof(char));
ul >>= 7;
}
if (RSTRING(buf)->len) {
bufs = RSTRING(buf)->ptr;
bufe = bufs + RSTRING(buf)->len - 1;
*bufs &= 0x7f; /* clear continue bit */
while (bufs < bufe) { /* reverse */
c = *bufs;
*bufs++ = *bufe;
*bufe-- = c;
}
rb_str_buf_cat(res, RSTRING(buf)->ptr, RSTRING(buf)->len);
}
else {
c = 0;
rb_str_buf_cat(res, &c, sizeof(char));
}
}
break;
default:
break;
}
}
if (associates) {
rb_str_associate(res, associates);
}
return res;
}
static char uu_table[] =
"`!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
static char b64_table[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static void
encodes(str, s, len, type)
VALUE str;
char *s;
long len;
int type;
{
char *buff = ALLOCA_N(char, len * 4 / 3 + 6);
long i = 0;
char *trans = type == 'u' ? uu_table : b64_table;
int padding;
if (type == 'u') {
buff[i++] = len + ' ';
padding = '`';
}
else {
padding = '=';
}
while (len >= 3) {
buff[i++] = trans[077 & (*s >> 2)];
buff[i++] = trans[077 & (((*s << 4) & 060) | ((s[1] >> 4) & 017))];
buff[i++] = trans[077 & (((s[1] << 2) & 074) | ((s[2] >> 6) & 03))];
buff[i++] = trans[077 & s[2]];
s += 3;
len -= 3;
}
if (len == 2) {
buff[i++] = trans[077 & (*s >> 2)];
buff[i++] = trans[077 & (((*s << 4) & 060) | ((s[1] >> 4) & 017))];
buff[i++] = trans[077 & (((s[1] << 2) & 074) | (('\0' >> 6) & 03))];
buff[i++] = padding;
}
else if (len == 1) {
buff[i++] = trans[077 & (*s >> 2)];
buff[i++] = trans[077 & (((*s << 4) & 060) | (('\0' >> 4) & 017))];
buff[i++] = padding;
buff[i++] = padding;
}
buff[i++] = '\n';
rb_str_buf_cat(str, buff, i);
}
static char hex_table[] = "0123456789ABCDEF";
static void
qpencode(str, from, len)
VALUE str, from;
long len;
{
char buff[1024];
long i = 0, n = 0, prev = EOF;
unsigned char *s = (unsigned char*)RSTRING(from)->ptr;
unsigned char *send = s + RSTRING(from)->len;
while (s < send) {
if ((*s > 126) ||
(*s < 32 && *s != '\n' && *s != '\t') ||
(*s == '=')) {
buff[i++] = '=';
buff[i++] = hex_table[*s >> 4];
buff[i++] = hex_table[*s & 0x0f];
n += 3;
prev = EOF;
}
else if (*s == '\n') {
if (prev == ' ' || prev == '\t') {
buff[i++] = '=';
buff[i++] = *s;
}
buff[i++] = *s;
n = 0;
prev = *s;
}
else {
buff[i++] = *s;
n++;
prev = *s;
}
if (n > len) {
buff[i++] = '=';
buff[i++] = '\n';
n = 0;
prev = '\n';
}
if (i > 1024 - 5) {
rb_str_buf_cat(str, buff, i);
i = 0;
}
s++;
}
if (n > 0) {
buff[i++] = '=';
buff[i++] = '\n';
}
if (i > 0) {
rb_str_buf_cat(str, buff, i);
}
}
static inline int
hex2num(c)
char c;
{
switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
return c - '0';
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
return c - 'a' + 10;
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
return c - 'A' + 10;
default:
return -1;
}
}
#define PACK_LENGTH_ADJUST_SIZE(sz) do { \
tmp = 0; \
if (len > (send-s)/sz) { \
if (!star) { \
tmp = len-(send-s)/sz; \
} \
len = (send-s)/sz; \
} \
} while (0)
#ifdef NATINT_PACK
#define PACK_LENGTH_ADJUST(type,sz) do { \
int t__len = NATINT_LEN(type,(sz)); \
PACK_LENGTH_ADJUST_SIZE(t__len); \
} while (0)
#else
#define PACK_LENGTH_ADJUST(type,sz) \
PACK_LENGTH_ADJUST_SIZE(sizeof(type))
#endif
#define PACK_ITEM_ADJUST() while (tmp--) rb_ary_push(ary, Qnil)
static VALUE
infected_str_new(ptr, len, str)
const char *ptr;
long len;
VALUE str;
{
VALUE s = rb_str_new(ptr, len);
OBJ_INFECT(s, str);
return s;
}
/*
* call-seq:
* str.unpack(format) => anArray
*
* Decodes <i>str</i> (which may contain binary data) according to the
* format string, returning an array of each value extracted. The
* format string consists of a sequence of single-character directives,
* summarized in the table at the end of this entry.
* Each directive may be followed
* by a number, indicating the number of times to repeat with this
* directive. An asterisk (``<code>*</code>'') will use up all
* remaining elements. The directives <code>sSiIlL</code> may each be
* followed by an underscore (``<code>_</code>'') to use the underlying
* platform's native size for the specified type; otherwise, it uses a
* platform-independent consistent size. Spaces are ignored in the
* format string. See also <code>Array#pack</code>.
*
* "abc \0\0abc \0\0".unpack('A6Z6') #=> ["abc", "abc "]
* "abc \0\0".unpack('a3a3') #=> ["abc", " \000\000"]
* "abc \0abc \0".unpack('Z*Z*') #=> ["abc ", "abc "]
* "aa".unpack('b8B8') #=> ["10000110", "01100001"]
* "aaa".unpack('h2H2c') #=> ["16", "61", 97]
* "\xfe\xff\xfe\xff".unpack('sS') #=> [-2, 65534]
* "now=20is".unpack('M*') #=> ["now is"]
* "whole".unpack('xax2aX2aX1aX2a') #=> ["h", "e", "l", "l", "o"]
*
* This table summarizes the various formats and the Ruby classes
* returned by each.
*
* Format | Returns | Function
* -------+---------+-----------------------------------------
* A | String | with trailing nulls and spaces removed
* -------+---------+-----------------------------------------
* a | String | string
* -------+---------+-----------------------------------------
* B | String | extract bits from each character (msb first)
* -------+---------+-----------------------------------------
* b | String | extract bits from each character (lsb first)
* -------+---------+-----------------------------------------
* C | Fixnum | extract a character as an unsigned integer
* -------+---------+-----------------------------------------
* c | Fixnum | extract a character as an integer
* -------+---------+-----------------------------------------
* d,D | Float | treat sizeof(double) characters as
* | | a native double
* -------+---------+-----------------------------------------
* E | Float | treat sizeof(double) characters as
* | | a double in little-endian byte order
* -------+---------+-----------------------------------------
* e | Float | treat sizeof(float) characters as
* | | a float in little-endian byte order
* -------+---------+-----------------------------------------
* f,F | Float | treat sizeof(float) characters as
* | | a native float
* -------+---------+-----------------------------------------
* G | Float | treat sizeof(double) characters as
* | | a double in network byte order
* -------+---------+-----------------------------------------
* g | Float | treat sizeof(float) characters as a
* | | float in network byte order
* -------+---------+-----------------------------------------
* H | String | extract hex nibbles from each character
* | | (most significant first)
* -------+---------+-----------------------------------------
* h | String | extract hex nibbles from each character
* | | (least significant first)
* -------+---------+-----------------------------------------
* I | Integer | treat sizeof(int) (modified by _)
* | | successive characters as an unsigned
* | | native integer
* -------+---------+-----------------------------------------
* i | Integer | treat sizeof(int) (modified by _)
* | | successive characters as a signed
* | | native integer
* -------+---------+-----------------------------------------
* L | Integer | treat four (modified by _) successive
* | | characters as an unsigned native
* | | long integer
* -------+---------+-----------------------------------------
* l | Integer | treat four (modified by _) successive
* | | characters as a signed native
* | | long integer
* -------+---------+-----------------------------------------
* M | String | quoted-printable
* -------+---------+-----------------------------------------
* m | String | base64-encoded
* -------+---------+-----------------------------------------
* N | Integer | treat four characters as an unsigned
* | | long in network byte order
* -------+---------+-----------------------------------------
* n | Fixnum | treat two characters as an unsigned
* | | short in network byte order
* -------+---------+-----------------------------------------
* P | String | treat sizeof(char *) characters as a
* | | pointer, and return \emph{len} characters
* | | from the referenced location
* -------+---------+-----------------------------------------
* p | String | treat sizeof(char *) characters as a
* | | pointer to a null-terminated string
* -------+---------+-----------------------------------------
* Q | Integer | treat 8 characters as an unsigned
* | | quad word (64 bits)
* -------+---------+-----------------------------------------
* q | Integer | treat 8 characters as a signed
* | | quad word (64 bits)
* -------+---------+-----------------------------------------
* S | Fixnum | treat two (different if _ used)
* | | successive characters as an unsigned
* | | short in native byte order
* -------+---------+-----------------------------------------
* s | Fixnum | Treat two (different if _ used)
* | | successive characters as a signed short
* | | in native byte order
* -------+---------+-----------------------------------------
* U | Integer | UTF-8 characters as unsigned integers
* -------+---------+-----------------------------------------
* u | String | UU-encoded
* -------+---------+-----------------------------------------
* V | Fixnum | treat four characters as an unsigned
* | | long in little-endian byte order
* -------+---------+-----------------------------------------
* v | Fixnum | treat two characters as an unsigned
* | | short in little-endian byte order
* -------+---------+-----------------------------------------
* w | Integer | BER-compressed integer (see Array.pack)
* -------+---------+-----------------------------------------
* X | --- | skip backward one character
* -------+---------+-----------------------------------------
* x | --- | skip forward one character
* -------+---------+-----------------------------------------
* Z | String | with trailing nulls removed
* | | upto first null with *
* -------+---------+-----------------------------------------
* @ | --- | skip to the offset given by the
* | | length argument
* -------+---------+-----------------------------------------
*/
static VALUE
pack_unpack(str, fmt)
VALUE str, fmt;
{
static char *hexdigits = "0123456789abcdef0123456789ABCDEFx";
char *s, *send;
char *p, *pend;
VALUE ary;
char type;
long len;
int tmp, star;
#ifdef NATINT_PACK
int natint; /* native integer */
#endif
StringValue(str);
StringValue(fmt);
s = RSTRING(str)->ptr;
send = s + RSTRING(str)->len;
p = RSTRING(fmt)->ptr;
pend = p + RSTRING(fmt)->len;
ary = rb_ary_new();
while (p < pend) {
type = *p++;
#ifdef NATINT_PACK
natint = 0;
#endif
if (ISSPACE(type)) continue;
if (type == '#') {
while ((p < pend) && (*p != '\n')) {
p++;
}
continue;
}
star = 0;
if (*p == '_' || *p == '!') {
char *natstr = "sSiIlL";
if (strchr(natstr, type)) {
#ifdef NATINT_PACK
natint = 1;
#endif
p++;
}
else {
rb_raise(rb_eArgError, "'%c' allowed only after types %s", *p, natstr);
}
}
if (p >= pend)
len = 1;
else if (*p == '*') {
star = 1;
len = send - s;
p++;
}
else if (ISDIGIT(*p)) {
len = strtoul(p, (char**)&p, 10);
}
else {
len = (type != '@');
}
switch (type) {
case '%':
rb_raise(rb_eArgError, "%% is not supported");
break;
case 'A':
if (len > send - s) len = send - s;
{
long end = len;
char *t = s + len - 1;
while (t >= s) {
if (*t != ' ' && *t != '\0') break;
t--; len--;
}
rb_ary_push(ary, infected_str_new(s, len, str));
s += end;
}
break;
case 'Z':
{
char *t = s;
if (len > send-s) len = send-s;
while (t < s+len && *t) t++;
rb_ary_push(ary, infected_str_new(s, t-s, str));
if (t < send) t++;
s = star ? t : s+len;
}
break;
case 'a':
if (len > send - s) len = send - s;
rb_ary_push(ary, infected_str_new(s, len, str));
s += len;
break;
case 'b':
{
VALUE bitstr;
char *t;
int bits;
long i;
if (p[-1] == '*' || len > (send - s) * 8)
len = (send - s) * 8;
bits = 0;
rb_ary_push(ary, bitstr = rb_str_new(0, len));
t = RSTRING(bitstr)->ptr;
for (i=0; i<len; i++) {
if (i & 7) bits >>= 1;
else bits = *s++;
*t++ = (bits & 1) ? '1' : '0';
}
}
break;
case 'B':
{
VALUE bitstr;
char *t;
int bits;
long i;
if (p[-1] == '*' || len > (send - s) * 8)
len = (send - s) * 8;
bits = 0;
rb_ary_push(ary, bitstr = rb_str_new(0, len));
t = RSTRING(bitstr)->ptr;
for (i=0; i<len; i++) {
if (i & 7) bits <<= 1;
else bits = *s++;
*t++ = (bits & 128) ? '1' : '0';
}
}
break;
case 'h':
{
VALUE bitstr;
char *t;
int bits;
long i;
if (p[-1] == '*' || len > (send - s) * 2)
len = (send - s) * 2;
bits = 0;
rb_ary_push(ary, bitstr = rb_str_new(0, len));
t = RSTRING(bitstr)->ptr;
for (i=0; i<len; i++) {
if (i & 1)
bits >>= 4;
else
bits = *s++;
*t++ = hexdigits[bits & 15];
}
}
break;
case 'H':
{
VALUE bitstr;
char *t;
int bits;
long i;
if (p[-1] == '*' || len > (send - s) * 2)
len = (send - s) * 2;
bits = 0;
rb_ary_push(ary, bitstr = rb_str_new(0, len));
t = RSTRING(bitstr)->ptr;
for (i=0; i<len; i++) {
if (i & 1)
bits <<= 4;
else
bits = *s++;
*t++ = hexdigits[(bits >> 4) & 15];
}
}
break;
case 'c':
PACK_LENGTH_ADJUST(char,sizeof(char));
while (len-- > 0) {
int c = *s++;
if (c > (char)127) c-=256;
rb_ary_push(ary, INT2FIX(c));
}
PACK_ITEM_ADJUST();
break;
case 'C':
PACK_LENGTH_ADJUST(unsigned char,sizeof(unsigned char));
while (len-- > 0) {
unsigned char c = *s++;
rb_ary_push(ary, INT2FIX(c));
}
PACK_ITEM_ADJUST();
break;
case 's':
PACK_LENGTH_ADJUST(short,2);
while (len-- > 0) {
short tmp = 0;
memcpy(OFF16(&tmp), s, NATINT_LEN(short,2));
EXTEND16(tmp);
s += NATINT_LEN(short,2);
rb_ary_push(ary, INT2FIX(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'S':
PACK_LENGTH_ADJUST(unsigned short,2);
while (len-- > 0) {
unsigned short tmp = 0;
memcpy(OFF16(&tmp), s, NATINT_LEN(unsigned short,2));
s += NATINT_LEN(unsigned short,2);
rb_ary_push(ary, INT2FIX(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'i':
PACK_LENGTH_ADJUST(int,sizeof(int));
while (len-- > 0) {
int tmp;
memcpy(&tmp, s, sizeof(int));
s += sizeof(int);
rb_ary_push(ary, INT2NUM(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'I':
PACK_LENGTH_ADJUST(unsigned int,sizeof(unsigned int));
while (len-- > 0) {
unsigned int tmp;
memcpy(&tmp, s, sizeof(unsigned int));
s += sizeof(unsigned int);
rb_ary_push(ary, UINT2NUM(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'l':
PACK_LENGTH_ADJUST(long,4);
while (len-- > 0) {
long tmp = 0;
memcpy(OFF32(&tmp), s, NATINT_LEN(long,4));
EXTEND32(tmp);
s += NATINT_LEN(long,4);
rb_ary_push(ary, LONG2NUM(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'L':
PACK_LENGTH_ADJUST(unsigned long,4);
while (len-- > 0) {
unsigned long tmp = 0;
memcpy(OFF32(&tmp), s, NATINT_LEN(unsigned long,4));
s += NATINT_LEN(unsigned long,4);
rb_ary_push(ary, ULONG2NUM(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'q':
PACK_LENGTH_ADJUST_SIZE(QUAD_SIZE);
while (len-- > 0) {
char *tmp = (char*)s;
s += QUAD_SIZE;
rb_ary_push(ary, rb_quad_unpack(tmp, 1));
}
PACK_ITEM_ADJUST();
break;
case 'Q':
PACK_LENGTH_ADJUST_SIZE(QUAD_SIZE);
while (len-- > 0) {
char *tmp = (char*)s;
s += QUAD_SIZE;
rb_ary_push(ary, rb_quad_unpack(tmp, 0));
}
break;
case 'n':
PACK_LENGTH_ADJUST(unsigned short,2);
while (len-- > 0) {
unsigned short tmp = 0;
memcpy(OFF16B(&tmp), s, NATINT_LEN(unsigned short,2));
s += NATINT_LEN(unsigned short,2);
rb_ary_push(ary, UINT2NUM(ntohs(tmp)));
}
PACK_ITEM_ADJUST();
break;
case 'N':
PACK_LENGTH_ADJUST(unsigned long,4);
while (len-- > 0) {
unsigned long tmp = 0;
memcpy(OFF32B(&tmp), s, NATINT_LEN(unsigned long,4));
s += NATINT_LEN(unsigned long,4);
rb_ary_push(ary, ULONG2NUM(ntohl(tmp)));
}
PACK_ITEM_ADJUST();
break;
case 'v':
PACK_LENGTH_ADJUST(unsigned short,2);
while (len-- > 0) {
unsigned short tmp = 0;
memcpy(OFF16(&tmp), s, NATINT_LEN(unsigned short,2));
s += NATINT_LEN(unsigned short,2);
rb_ary_push(ary, UINT2NUM(vtohs(tmp)));
}
PACK_ITEM_ADJUST();
break;
case 'V':
PACK_LENGTH_ADJUST(unsigned long,4);
while (len-- > 0) {
unsigned long tmp = 0;
memcpy(OFF32(&tmp), s, NATINT_LEN(long,4));
s += NATINT_LEN(long,4);
rb_ary_push(ary, ULONG2NUM(vtohl(tmp)));
}
PACK_ITEM_ADJUST();
break;
case 'f':
case 'F':
PACK_LENGTH_ADJUST(float,sizeof(float));
while (len-- > 0) {
float tmp;
memcpy(&tmp, s, sizeof(float));
s += sizeof(float);
rb_ary_push(ary, rb_float_new((double)tmp));
}
PACK_ITEM_ADJUST();
break;
case 'e':
PACK_LENGTH_ADJUST(float,sizeof(float));
while (len-- > 0) {
float tmp;
FLOAT_CONVWITH(ftmp);
memcpy(&tmp, s, sizeof(float));
s += sizeof(float);
tmp = VTOHF(tmp,ftmp);
rb_ary_push(ary, rb_float_new((double)tmp));
}
PACK_ITEM_ADJUST();
break;
case 'E':
PACK_LENGTH_ADJUST(double,sizeof(double));
while (len-- > 0) {
double tmp;
DOUBLE_CONVWITH(dtmp);
memcpy(&tmp, s, sizeof(double));
s += sizeof(double);
tmp = VTOHD(tmp,dtmp);
rb_ary_push(ary, rb_float_new(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'D':
case 'd':
PACK_LENGTH_ADJUST(double,sizeof(double));
while (len-- > 0) {
double tmp;
memcpy(&tmp, s, sizeof(double));
s += sizeof(double);
rb_ary_push(ary, rb_float_new(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'g':
PACK_LENGTH_ADJUST(float,sizeof(float));
while (len-- > 0) {
float tmp;
FLOAT_CONVWITH(ftmp;)
memcpy(&tmp, s, sizeof(float));
s += sizeof(float);
tmp = NTOHF(tmp,ftmp);
rb_ary_push(ary, rb_float_new((double)tmp));
}
PACK_ITEM_ADJUST();
break;
case 'G':
PACK_LENGTH_ADJUST(double,sizeof(double));
while (len-- > 0) {
double tmp;
DOUBLE_CONVWITH(dtmp);
memcpy(&tmp, s, sizeof(double));
s += sizeof(double);
tmp = NTOHD(tmp,dtmp);
rb_ary_push(ary, rb_float_new(tmp));
}
PACK_ITEM_ADJUST();
break;
case 'U':
if (len > send - s) len = send - s;
while (len > 0 && s < send) {
long alen = send - s;
unsigned long l;
l = utf8_to_uv(s, &alen);
s += alen; len--;
rb_ary_push(ary, ULONG2NUM(l));
}
break;
case 'u':
{
VALUE buf = infected_str_new(0, (send - s)*3/4, str);
char *ptr = RSTRING(buf)->ptr;
long total = 0;
while (s < send && *s > ' ' && *s < 'a') {
long a,b,c,d;
char hunk[4];
hunk[3] = '\0';
len = (*s++ - ' ') & 077;
total += len;
if (total > RSTRING(buf)->len) {
len -= total - RSTRING(buf)->len;
total = RSTRING(buf)->len;
}
while (len > 0) {
long mlen = len > 3 ? 3 : len;
if (s < send && *s >= ' ')
a = (*s++ - ' ') & 077;
else
a = 0;
if (s < send && *s >= ' ')
b = (*s++ - ' ') & 077;
else
b = 0;
if (s < send && *s >= ' ')
c = (*s++ - ' ') & 077;
else
c = 0;
if (s < send && *s >= ' ')
d = (*s++ - ' ') & 077;
else
d = 0;
hunk[0] = a << 2 | b >> 4;
hunk[1] = b << 4 | c >> 2;
hunk[2] = c << 6 | d;
memcpy(ptr, hunk, mlen);
ptr += mlen;
len -= mlen;
}
if (*s == '\r') s++;
if (*s == '\n') s++;
else if (s < send && (s+1 == send || s[1] == '\n'))
s += 2; /* possible checksum byte */
}
RSTRING(buf)->ptr[total] = '\0';
RSTRING(buf)->len = total;
rb_ary_push(ary, buf);
}
break;
case 'm':
{
VALUE buf = infected_str_new(0, (send - s)*3/4, str);
char *ptr = RSTRING(buf)->ptr;
int a = -1,b = -1,c = 0,d;
static int first = 1;
static int b64_xtable[256];
if (first) {
int i;
first = 0;
for (i = 0; i < 256; i++) {
b64_xtable[i] = -1;
}
for (i = 0; i < 64; i++) {
b64_xtable[(int)b64_table[i]] = i;
}
}
while (s < send) {
while (s[0] == '\r' || s[0] == '\n') { s++; }
if ((a = b64_xtable[(int)s[0]]) == -1) break;
if ((b = b64_xtable[(int)s[1]]) == -1) break;
if ((c = b64_xtable[(int)s[2]]) == -1) break;
if ((d = b64_xtable[(int)s[3]]) == -1) break;
*ptr++ = a << 2 | b >> 4;
*ptr++ = b << 4 | c >> 2;
*ptr++ = c << 6 | d;
s += 4;
}
if (a != -1 && b != -1) {
if (s + 2 < send && s[2] == '=')
*ptr++ = a << 2 | b >> 4;
if (c != -1 && s + 3 < send && s[3] == '=') {
*ptr++ = a << 2 | b >> 4;
*ptr++ = b << 4 | c >> 2;
}
}
*ptr = '\0';
RSTRING(buf)->len = ptr - RSTRING(buf)->ptr;
rb_ary_push(ary, buf);
}
break;
case 'M':
{
VALUE buf = infected_str_new(0, send - s, str);
char *ptr = RSTRING(buf)->ptr;
int c1, c2;
while (s < send) {
if (*s == '=') {
if (++s == send) break;
if (*s != '\n') {
if ((c1 = hex2num(*s)) == -1) break;
if (++s == send) break;
if ((c2 = hex2num(*s)) == -1) break;
*ptr++ = c1 << 4 | c2;
}
}
else {
*ptr++ = *s;
}
s++;
}
*ptr = '\0';
RSTRING(buf)->len = ptr - RSTRING(buf)->ptr;
rb_ary_push(ary, buf);
}
break;
case '@':
if (len > RSTRING(str)->len)
rb_raise(rb_eArgError, "@ outside of string");
s = RSTRING(str)->ptr + len;
break;
case 'X':
if (len > s - RSTRING(str)->ptr)
rb_raise(rb_eArgError, "X outside of string");
s -= len;
break;
case 'x':
if (len > send - s)
rb_raise(rb_eArgError, "x outside of string");
s += len;
break;
case 'P':
if (sizeof(char *) <= send - s) {
char *t;
VALUE tmp;
memcpy(&t, s, sizeof(char *));
s += sizeof(char *);
if (t) {
VALUE a, *p, *pend;
if (!(a = rb_str_associated(str))) {
rb_raise(rb_eArgError, "no associated pointer");
}
p = RARRAY(a)->ptr;
pend = p + RARRAY(a)->len;
while (p < pend) {
if (TYPE(*p) == T_STRING && RSTRING(*p)->ptr == t) {
if (len > RSTRING(*p)->len) {
len = RSTRING(*p)->len;
}
break;
}
p++;
}
if (p == pend) {
rb_raise(rb_eArgError, "non associated pointer");
}
tmp = rb_tainted_str_new(t, len);
}
else {
tmp = Qnil;
}
rb_ary_push(ary, tmp);
}
break;
case 'p':
if (len > (send - s) / sizeof(char *))
len = (send - s) / sizeof(char *);
while (len-- > 0) {
if (send - s < sizeof(char *))
break;
else {
VALUE tmp;
char *t;
memcpy(&t, s, sizeof(char *));
s += sizeof(char *);
if (t) {
VALUE a, *p, *pend;
if (!(a = rb_str_associated(str))) {
rb_raise(rb_eArgError, "no associated pointer");
}
p = RARRAY(a)->ptr;
pend = p + RARRAY(a)->len;
while (p < pend) {
if (TYPE(*p) == T_STRING && RSTRING(*p)->ptr == t) {
break;
}
p++;
}
if (p == pend) {
rb_raise(rb_eArgError, "non associated pointer");
}
tmp = rb_str_new2(t);
OBJ_INFECT(tmp, str);
}
else {
tmp = Qnil;
}
rb_ary_push(ary, tmp);
}
}
break;
case 'w':
{
unsigned long ul = 0;
unsigned long ulmask = 0xfeL << ((sizeof(unsigned long) - 1) * 8);
while (len > 0 && s < send) {
ul <<= 7;
ul |= (*s & 0x7f);
if (!(*s++ & 0x80)) {
rb_ary_push(ary, ULONG2NUM(ul));
len--;
ul = 0;
}
else if (ul & ulmask) {
VALUE big = rb_uint2big(ul);
VALUE big128 = rb_uint2big(128);
while (s < send) {
big = rb_big_mul(big, big128);
big = rb_big_plus(big, rb_uint2big(*s & 0x7f));
if (!(*s++ & 0x80)) {
rb_ary_push(ary, big);
len--;
ul = 0;
break;
}
}
}
}
}
break;
default:
break;
}
}
return ary;
}
#define BYTEWIDTH 8
static int
uv_to_utf8(buf, uv)
char *buf;
unsigned long uv;
{
if (uv <= 0x7f) {
buf[0] = (char)uv;
return 1;
}
if (uv <= 0x7ff) {
buf[0] = ((uv>>6)&0xff)|0xc0;
buf[1] = (uv&0x3f)|0x80;
return 2;
}
if (uv <= 0xffff) {
buf[0] = ((uv>>12)&0xff)|0xe0;
buf[1] = ((uv>>6)&0x3f)|0x80;
buf[2] = (uv&0x3f)|0x80;
return 3;
}
if (uv <= 0x1fffff) {
buf[0] = ((uv>>18)&0xff)|0xf0;
buf[1] = ((uv>>12)&0x3f)|0x80;
buf[2] = ((uv>>6)&0x3f)|0x80;
buf[3] = (uv&0x3f)|0x80;
return 4;
}
if (uv <= 0x3ffffff) {
buf[0] = ((uv>>24)&0xff)|0xf8;
buf[1] = ((uv>>18)&0x3f)|0x80;
buf[2] = ((uv>>12)&0x3f)|0x80;
buf[3] = ((uv>>6)&0x3f)|0x80;
buf[4] = (uv&0x3f)|0x80;
return 5;
}
if (uv <= 0x7fffffff) {
buf[0] = ((uv>>30)&0xff)|0xfc;
buf[1] = ((uv>>24)&0x3f)|0x80;
buf[2] = ((uv>>18)&0x3f)|0x80;
buf[3] = ((uv>>12)&0x3f)|0x80;
buf[4] = ((uv>>6)&0x3f)|0x80;
buf[5] = (uv&0x3f)|0x80;
return 6;
}
rb_raise(rb_eRangeError, "pack(U): value out of range");
}
static const long utf8_limits[] = {
0x0, /* 1 */
0x80, /* 2 */
0x800, /* 3 */
0x10000, /* 4 */
0x200000, /* 5 */
0x4000000, /* 6 */
0x80000000, /* 7 */
};
static unsigned long
utf8_to_uv(p, lenp)
char *p;
long *lenp;
{
int c = *p++ & 0xff;
unsigned long uv = c;
long n;
if (!(uv & 0x80)) {
*lenp = 1;
return uv;
}
if (!(uv & 0x40)) {
*lenp = 1;
rb_raise(rb_eArgError, "malformed UTF-8 character");
}
if (!(uv & 0x20)) { n = 2; uv &= 0x1f; }
else if (!(uv & 0x10)) { n = 3; uv &= 0x0f; }
else if (!(uv & 0x08)) { n = 4; uv &= 0x07; }
else if (!(uv & 0x04)) { n = 5; uv &= 0x03; }
else if (!(uv & 0x02)) { n = 6; uv &= 0x01; }
else {
*lenp = 1;
rb_raise(rb_eArgError, "malformed UTF-8 character");
}
if (n > *lenp) {
rb_raise(rb_eArgError, "malformed UTF-8 character (expected %d bytes, given %d bytes)",
n, *lenp);
}
*lenp = n--;
if (n != 0) {
while (n--) {
c = *p++ & 0xff;
if ((c & 0xc0) != 0x80) {
*lenp -= n + 1;
rb_raise(rb_eArgError, "malformed UTF-8 character");
}
else {
c &= 0x3f;
uv = uv << 6 | c;
}
}
}
n = *lenp - 1;
if (uv < utf8_limits[n]) {
rb_raise(rb_eArgError, "redundant UTF-8 sequence");
}
return uv;
}
void
Init_pack()
{
rb_define_method(rb_cArray, "pack", pack_pack, 1);
rb_define_method(rb_cString, "unpack", pack_unpack, 1);
}
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