/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "common.h"
#include "buffer.c"
int
_check_buf(PerlIO *infile, Buffer *buf, int min_wanted, int max_wanted)
{
int ret = 1;
// Do we have enough data?
if ( buffer_len(buf) < min_wanted ) {
// Read more data
uint32_t read;
uint32_t actual_wanted;
unsigned char *tmp;
#ifdef _MSC_VER
uint32_t pos_check = PerlIO_tell(infile);
#endif
if (min_wanted > max_wanted) {
max_wanted = min_wanted;
}
// Adjust actual amount to read by the amount we already have in the buffer
actual_wanted = max_wanted - buffer_len(buf);
New(0, tmp, actual_wanted, unsigned char);
DEBUG_TRACE("Buffering from file @ %d (min_wanted %d, max_wanted %d, adjusted to %d)\n",
(int)PerlIO_tell(infile), min_wanted, max_wanted, actual_wanted
);
if ( (read = PerlIO_read(infile, tmp, actual_wanted)) <= 0 ) {
if ( PerlIO_error(infile) ) {
warn("Error reading: %s (wanted %d)\n", strerror(errno), actual_wanted);
}
else {
// Avoid printing this warning, let image format routines handle warnings and errors
//warn("Error: Unable to read at least %d bytes from file.\n", min_wanted);
}
ret = 0;
goto out;
}
buffer_append(buf, tmp, read);
// Make sure we got enough
if ( buffer_len(buf) < min_wanted ) {
warn("Error: Unable to read at least %d bytes from file (only read %d).\n", min_wanted, read);
ret = 0;
goto out;
}
#ifdef _MSC_VER
// Bug 16095, weird off-by-one bug seen only on Win32 and only when reading a filehandle
if (PerlIO_tell(infile) != pos_check + read) {
//PerlIO_printf(PerlIO_stderr(), "Win32 bug, pos should be %d, but was %d\n", pos_check + read, PerlIO_tell(infile));
PerlIO_seek(infile, pos_check + read, SEEK_SET);
}
#endif
DEBUG_TRACE("Buffered %d bytes, new pos %d\n", read, (int)PerlIO_tell(infile));
out:
Safefree(tmp);
}
return ret;
}
off_t
_file_size(PerlIO *infile)
{
#ifdef _MSC_VER
// Win32 doesn't work right with fstat
off_t file_size;
PerlIO_seek(infile, 0, SEEK_END);
file_size = PerlIO_tell(infile);
PerlIO_seek(infile, 0, SEEK_SET);
return file_size;
#else
struct stat buf;
if ( !fstat( PerlIO_fileno(infile), &buf ) ) {
return buf.st_size;
}
warn("Unable to stat: %s\n", strerror(errno));
return 0;
#endif
}
#ifdef AUDIO_SCAN_DEBUG
void
hexdump(unsigned char *data, uint32_t size)
{
unsigned char c;
int i = 1;
int n;
char bytestr[4] = {0};
char hexstr[ 16*3 + 5] = {0};
char charstr[16*1 + 5] = {0};
if (!size) {
return;
}
for (n = 0; n < size; n++) {
c = data[n];
/* store hex str (for left side) */
snprintf(bytestr, sizeof(bytestr), "%02x ", c);
strncat(hexstr, bytestr, sizeof(hexstr)-strlen(hexstr)-1);
/* store char str (for right side) */
if (c < 21 || c > 0x7E) {
c = '.';
}
snprintf(bytestr, sizeof(bytestr), "%c", c);
strncat(charstr, bytestr, sizeof(charstr)-strlen(charstr)-1);
if (i % 16 == 0) {
/* line completed */
PerlIO_printf(PerlIO_stderr(), "%-50.50s %s\n", hexstr, charstr);
hexstr[0] = 0;
charstr[0] = 0;
}
i++;
}
if (strlen(hexstr) > 0) {
/* print rest of buffer if not empty */
PerlIO_printf(PerlIO_stderr(), "%-50.50s %s\n", hexstr, charstr);
}
}
#endif