#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define NEED_sv_2pvbyte
#include "ppport.h"
#include "src/csnappy_compress.c"
#include "src/csnappy_decompress.c"
MODULE = Compress::Snappy PACKAGE = Compress::Snappy
PROTOTYPES: ENABLE
SV *
compress (sv)
SV *sv
PREINIT:
char *src, *dest;
STRLEN src_len;
uint32_t dest_len;
void *working_memory;
CODE:
SvGETMAGIC(sv);
if (SvROK(sv) && ! SvAMAGIC(sv)) {
sv = SvRV(sv);
SvGETMAGIC(sv);
}
if (! SvOK(sv))
XSRETURN_NO;
src = SvPVbyte(sv, src_len);
if (! src_len)
XSRETURN_NO;
dest_len = csnappy_max_compressed_length(src_len);
if (! dest_len)
XSRETURN_UNDEF;
Newx(working_memory, CSNAPPY_WORKMEM_BYTES, void *);
if (! working_memory)
XSRETURN_UNDEF;
RETVAL = newSV(dest_len);
dest = SvPVX(RETVAL);
if (! dest)
XSRETURN_UNDEF;
csnappy_compress(src, src_len, dest, &dest_len, working_memory,
CSNAPPY_WORKMEM_BYTES_POWER_OF_TWO);
Safefree(working_memory);
SvCUR_set(RETVAL, dest_len);
SvPOK_on(RETVAL);
OUTPUT:
RETVAL
SV *
decompress (sv)
SV *sv
ALIAS:
uncompress = 1
PREINIT:
char *src, *dest;
STRLEN src_len;
uint32_t dest_len;
int header_len;
CODE:
PERL_UNUSED_VAR(ix); /* -W */
SvGETMAGIC(sv);
if (SvROK(sv) && ! SvAMAGIC(sv)) {
sv = SvRV(sv);
SvGETMAGIC(sv);
}
if (! SvOK(sv))
XSRETURN_NO;
src = SvPVbyte(sv, src_len);
if (! src_len)
XSRETURN_NO;
header_len = csnappy_get_uncompressed_length(src, src_len, &dest_len);
if (0 > header_len || ! dest_len)
XSRETURN_UNDEF;
RETVAL = newSV(dest_len);
dest = SvPVX(RETVAL);
if (! dest)
XSRETURN_UNDEF;
if (csnappy_decompress_noheader(src + header_len, src_len - header_len,
dest, &dest_len))
XSRETURN_UNDEF;
SvCUR_set(RETVAL, dest_len);
SvPOK_on(RETVAL);
OUTPUT:
RETVAL