// {{{ includes

#include <ctype.h>
//#include "defines.h"
#include <errno.h>
#include <iconv.h>
#include <malloc.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "vbuf.h"
#include "generic.h"

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif

// }}}

int skip_nl( char *s ) // {{{ returns the width of the newline at s[0]
{
        if( s[0] == '\n' ) return 1;
        if( s[0] == '\r' && s[1] == '\n' ) return 2;
        if( s[0] == '\0' ) return 0;
        return -1;
} // }}}
int find_nl( vstr *vs ) // {{{ find newline of type type in b
{
        char *nextr, *nextn;

        nextr = memchr( vs->b, '\r', vs->dlen );
        nextn = memchr( vs->b, '\n', vs->dlen );

        //case 1: UNIX, we find \n first
        if( nextn && (nextr == NULL || nextr > nextn ) ) {
                return nextn - vs->b;
        }

        //case 2: DOS, we find \r\n
        if( NULL != nextr && NULL != nextn && 1 == (char*)nextn - (char*)nextr ) {
                return nextr - vs->b;
        }

        //case 3: we find nothing

        return -1;
} // }}}

// {{{ UTF8 <-> UTF16 <-> ISO8859 Character set conversion functions and (ack) their globals

//TODO: the following should not be
char *wwbuf=NULL;
size_t nwwbuf=0;
static int unicode_up=0;
iconv_t i16to8, i8to16, i8859_1to8, i8toi8859_1;

void unicode_init() // {{{
{
	char *wipe = "";
	char dump[4];

	if( unicode_up ) unicode_close();

	if( (iconv_t)-1 == (i16to8 = iconv_open( "UTF-8", "UTF-16" ) ) ) {
		fprintf(stderr, "doexport(): Couldn't open iconv descriptor for UTF-16 to UTF-8.\n");
		exit( 1 );
	}

	if( (iconv_t)-1 == (i8to16 = iconv_open( "UTF-16", "UTF-8" ) ) ) {
		fprintf(stderr, "doexport(): Couldn't open iconv descriptor for UTF-8 to UTF-16.\n");
		exit( 2 );
	}

	//iconv will prefix output with an FF FE (utf-16 start seq), the following dumps that.
	memset( dump, 'x', 4 );
	ASSERT( 0 == utf8to16( wipe, 1, dump, 4 ), "unicode_init(): attempt to dump FF FE failed." );

	if( (iconv_t)-1 == (i8859_1to8 = iconv_open( "UTF-8", "ISO_8859-1" ) ) ) {
		fprintf(stderr, "doexport(): Couldn't open iconv descriptor for ASCII to UTF-8.\n");
		exit( 1 );
	}


	if( (iconv_t)-1 == (i8toi8859_1 = iconv_open( "ISO_8859-1", "UTF-8" ) ) ) {
		fprintf(stderr, "doexport(): Couldn't open iconv descriptor for UTF-8 to ASCII.\n");
		exit( 1 );
	}

	unicode_up = 1;
}
// }}}
void unicode_close() // {{{
{
	unicode_up = 0;
	iconv_close( i8to16 );
	iconv_close( i16to8 );
	iconv_close( i8859_1to8 );
	iconv_close( i8toi8859_1 );
}
// }}}

//int utf16_write( FILE* stream, const void *buf, size_t count ) // {{{ write utf-8 or iso_8869-1 to stream after converting it to utf-16
//{
//
//	//TODO: if anything big comes through here we are sunk, should do it
//	//bit-by-bit, not one-big-gulp
//	
//	size_t inbytesleft, outbytesleft;
//	char *inbuf, *outbuf;
//	size_t icresult;
//	size_t rl;
//
//	//do we have enough buffer space?
//	if( !wwbuf || nwwbuf < (count * 2 + 2) ) {
//		wwbuf = F_REALLOC( wwbuf, count * 2 +2 ); 
//
//		nwwbuf = count * 2 + 2;
//	}
//
//	inbytesleft = count; outbytesleft = nwwbuf;
//	inbuf = (char*)buf; outbuf = wwbuf;
//
////	fprintf(stderr, "X%s, %dX", (char*)buf, strlen( buf ));
////	fflush(stderr);
//
//	if( (rl = strlen( buf ) + 1) != count ) {
//		fprintf(stderr, "utf16_write(): reported buffer size (%d) does not match string length (%d)\n",
//				count,
//				rl);
//
//		//hexdump( (char*)buf, 0, count, 1 );
//
//		raise( SIGSEGV );
//		inbytesleft = rl;
//	}
//
////	fprintf(stderr, "  attempting to convert:\n");
////	hexdump( (char*)inbuf, 0, count, 1 );
//
//	icresult = iconv( i8to16, &inbuf, &inbytesleft, &outbuf, &outbytesleft );
//
////	fprintf(stderr, "  converted:\n");
////	hexdump( (char*)buf, 0, count, 1 );
//
////	fprintf(stderr, "  to:\n");
////	hexdump( (char*)wwbuf, 0, nwwbuf, 1 );
//
//	if( (size_t)-1  == icresult ) {
//		fprintf(stderr, "utf16_write(): iconv failure(%d): %s\n", errno, strerror( errno ) );
//		fprintf(stderr, "  attempted to convert:\n");
//		hexdump( (char*)inbuf, 0, count, 1 );
//
//		fprintf(stderr, "  result:\n");
//		hexdump( (char*)outbuf, 0, count, 1 );
//
//		fprintf(stderr, "I'm going to segfault now.\n");
//		raise( SIGSEGV );
//		exit(1);
//	}
//
//	if( inbytesleft > 0 ) {
//		fprintf(stderr, "utf16_write(): iconv returned a short count.\n");
//		exit(1);
//	}
//
//	return fwrite( wwbuf, nwwbuf - outbytesleft - 2, 1, stream  );
//}
// }}}

//char *utf16buf = NULL;
//int utf16buf_len = 0;
//
//int utf16_fprintf( FILE* stream, const char *fmt, ... ) // {{{
//{
//	int result=0;
//	va_list ap;
//
//	if( utf16buf == NULL ) {
//		utf16buf = (char*)F_MALLOC( SZ_MAX + 1 );
//
//		utf16buf_len = SZ_MAX + 1;
//	}
//
//	va_start( ap, fmt );
//
//	result = vsnprintf( utf16buf, utf16buf_len, fmt, ap );
//
//	if( result + 1 > utf16buf_len ) { //didn't have space, realloc() and try again
//		fprintf(stderr, "utf16_fprintf(): buffer too small (%d), F_MALLOC(%d)\n", utf16buf_len, result);
//		free( utf16buf );
//		utf16buf_len = result + 1;
//		utf16buf = (char*)F_MALLOC( utf16buf_len );
//
//		result = vsnprintf( utf16buf, utf16buf_len, fmt, ap );
//	}
//
//
//	//didn't have space...again...something weird is going on...
//	ASSERT( result + 1 <= utf16buf_len,  "utf16_fprintf(): Unpossible error!\n");
//
//	if( 1 != utf16_write( stream, utf16buf, result + 1 ) )
//		DIE( "Write error?  -> %s or %s\n", strerror( errno ), uerr_str( uerr_get() ) );
//
//	return result;
//}
//// }}}
//int utf16to8( char *inbuf_o, char *outbuf_o, int length ) // {{{
//{
//	int inbytesleft = length;
//	int outbytesleft = length;
//	char *inbuf = inbuf_o;
//	char *outbuf = outbuf_o;
//	int rlen = -1, tlen;
//	int icresult = -1; 
//
//	int i, strlen=-1;
//	
//	DEBUG(
//		fprintf(stderr, "  utf16to8(): attempting to convert:\n");
//		//hexdump( (char*)inbuf_o, 0, length, 1 );
//		fflush(stderr);
//	);
//
//	for( i=0; i<length ; i+=2 ) {
//		if( inbuf_o[i] == 0 && inbuf_o[i + 1] == 0 ) {
//			//fprintf(stderr, "End of string found at: %d\n", i );
//			strlen = i;
//		}
//	}
//
//	//hexdump( (char*)inbuf_o, 0, strlen, 1 );
//
//	if( -1 == strlen ) WARN("String is not zero-terminated.");
//
//	//iconv does not like it when the inbytesleft > actual string length
//	//enum: zero terminated, length valid
//	//      zero terminated, length short //we won't go beyond length ever, so this is same as NZT case
//	//      zero terminated, length long
//	//      not zero terminated
//	//      TODO: MEMORY BUG HERE!
//	for( tlen = 0; tlen <= inbytesleft - 2; tlen+=2 ) {
//		if( inbuf_o[tlen] == 0 && inbuf_o[tlen+1] == 0 ){
//			rlen = tlen + 2;
//			tlen = rlen;
//			break;
//		}
//		if( tlen == inbytesleft )fprintf(stderr, "Space allocated for string > actual string length.  Go windows!\n");
//	}
//
//	if( rlen >= 0 )
//		icresult = iconv( i16to8, &inbuf, &rlen, &outbuf, &outbytesleft );
//
//	if( icresult == (size_t)-1 ) {
//		fprintf(stderr, "utf16to8(): iconv failure(%d): %s\n", errno, strerror( errno ) );
//		fprintf(stderr, "  attempted to convert:\n");
//		hexdump( (char*)inbuf_o, 0, length, 1 );
//		fprintf(stderr, "  result:\n");
//		hexdump( (char*)outbuf_o, 0, length, 1 );
//		fprintf(stderr, "  MyDirtyOut:\n");
//		for( i=0; i<length; i++) {
//			if( inbuf_o[i] != '\0' ) fprintf(stderr, "%c", inbuf_o[i] );
//		}
//
//		fprintf( stderr, "\n" );
//		raise( SIGSEGV );
//		exit(1);
//	}
//
//	DEBUG(
//		fprintf(stderr, "  result:\n");
//		hexdump( (char*)outbuf_o, 0, length, 1 );
//	     )
//
//	//fprintf(stderr, "utf16to8() returning %s\n", outbuf );
//
//	return icresult;	
//}
//// }}}
int utf16_is_terminated( char *str, int length ) // {{{
{
	VSTR_STATIC( errbuf, 100 );
	int len = -1;
	int i;
	for( i=0; i<length ; i+=2 ) {
		if( str[i] == 0 && str[i + 1] == 0 ) {
			//fprintf(stderr, "End of string found at: %d\n", i );
			len = i;
		}
	}

	//hexdump( (char*)inbuf_o, 0, len, 1 );

	if( -1 == len ) {
		vshexdump( errbuf, str, 0, length, 1 );
		WARN("String is not zero terminated (probably broken data from registry) %s.", errbuf->b);
	}

	return (-1 == len )?0:1;
} // }}}
int vb_utf16to8( vbuf *dest, char *buf, int len ) // {{{
{
	int inbytesleft = len;
	char *inbuf = buf;
	//int rlen = -1, tlen;
	int icresult = -1; 
	VBUF_STATIC( dumpster, 100 );

	//int i; //, strlen=-1;
	int outbytesleft; 
	char *outbuf;

	ASSERT( unicode_up, "vb_utf16to8() called before unicode started." );

	if( 2 > dest->blen ) vbresize( dest, 2 );
	dest->dlen = 0;

	//Bad Things can happen if a non-zero-terminated utf16 string comes through here
	if( !utf16_is_terminated( buf, len ) ) return -1;

	do {
		outbytesleft = dest->blen - dest->dlen;
		outbuf = dest->b + dest->dlen;
		icresult = iconv( i16to8, &inbuf, &inbytesleft, &outbuf, &outbytesleft );
		dest->dlen = outbuf - dest->b;
		vbgrow( dest, inbytesleft);
	} while( (size_t)-1 == icresult && E2BIG == errno );

	if( 0 != vb_utf8to16T( dumpster, dest->b, dest->dlen ) )
		DIE("Reverse conversion failed.");

	if( icresult == (size_t)-1 ) {
		//TODO: error
		//ERR_UNIX( errno, "vb_utf16to8():iconv failure: %s", strerror( errno ) );
		unicode_init();
		return -1;
		/*
		fprintf(stderr, "  attempted to convert:\n");
		hexdump( (char*)cin, 0, inlen, 1 );
		fprintf(stderr, "  result:\n");
		hexdump( (char*)bout->b, 0, bout->dlen, 1 );
		fprintf(stderr, "  MyDirtyOut:\n");
		for( i=0; i<inlen; i++) {
			if( inbuf[i] != '\0' ) fprintf(stderr, "%c", inbuf[i] );
		}

		fprintf( stderr, "\n" );
		raise( SIGSEGV );
		exit(1);
		*/
	}

	if( icresult ) {
		//ERR_UNIX( EILSEQ, "Uhhhh...vb_utf16to8() returning icresult == %d", icresult );
		return -1;
	}
	return icresult;	
}
// }}}

int utf8to16( char *inbuf_o, int iblen, char *outbuf_o, int oblen) // {{{ iblen, oblen: bytes including \0
{
	//TODO: this is *only* used to dump the utf16 preamble now...
	//TODO: This (and 8to16) are the most horrible things I have ever seen...
	int inbytesleft;
	int outbytesleft = oblen;
	char *inbuf = inbuf_o;
	char *outbuf = outbuf_o;
	//int rlen = -1, tlen;
	int icresult = -1; 

	char *stend;

	//int i; //, strlen=-1;
	
	DEBUG(
		fprintf(stderr, "  utf8to16(): attempting to convert:\n");
		//hexdump( (char*)inbuf_o, 0, length, 1 );
		fflush(stderr);
	);

	stend = memchr( inbuf_o, '\0', iblen );
	ASSERT( NULL != stend, "utf8to16(): in string not zero terminated." );

	inbytesleft = ( stend - inbuf_o + 1 < iblen )? stend - inbuf_o + 1: iblen;

	//iconv does not like it when the inbytesleft > actual string length
	//enum: zero terminated, length valid
	//      zero terminated, length short //we won't go beyond length ever, so this is same as NZT case
	//      zero terminated, length long
	//      not zero terminated
	//      TODO: MEMORY BUG HERE!
	//      
	/*
	for( tlen = 0; tlen <= inbytesleft - 2; tlen+=2 ) {
		if( inbuf_o[tlen] == 0 && inbuf_o[tlen+1] == 0 ){
			rlen = tlen + 2;
			tlen = rlen;
			break;
		}
		if( tlen == inbytesleft )fprintf(stderr, "Space allocated for string > actual string length.  Go windows!\n");
	}
	*/

	//if( rlen >= 0 )
		icresult = iconv( i8to16, &inbuf, &inbytesleft, &outbuf, &outbytesleft );

	if( icresult == (size_t)-1 ) {
		DIE("iconv failure(%d): %s\n", errno, strerror( errno ) );
		//fprintf(stderr, "  attempted to convert:\n");
		//hexdump( (char*)inbuf_o, 0, iblen, 1 );
		//fprintf(stderr, "  result:\n");
		//hexdump( (char*)outbuf_o, 0, oblen, 1 );
		//fprintf(stderr, "  MyDirtyOut:\n");
//		for( i=0; i<iblen; i++) {
//			if( inbuf_o[i] != '\0' ) fprintf(stderr, "%c", inbuf_o[i] );
//		}
//
//		fprintf( stderr, "\n" );
//		raise( SIGSEGV );
//		exit(1);
	}

//	DEBUG(
//		fprintf(stderr, "  result:\n");
//		hexdump( (char*)outbuf_o, 0, oblen, 1 );
//	     )

	//fprintf(stderr, "utf8to16() returning %s\n", outbuf );

	//TODO: error
	if( icresult ) printf("Uhhhh...utf8to16() returning icresult == %d\n", icresult );
	return icresult;	
}
// }}}

int vb_utf8to16T( vbuf *bout, char *cin, int inlen ) // {{{ 
{
	//TODO: This (and 8to16) are the most horrible things I have ever seen...
	int inbytesleft = inlen;
	char *inbuf = cin;
	//int rlen = -1, tlen;
	int icresult = -1; 

	//int i; //, strlen=-1;
	
	//if( rlen >= 0 )
	int outbytesleft; 
	char *outbuf;
	if( 2 > bout->blen ) vbresize( bout, 2 );
	bout->dlen = 0;

	do {
		outbytesleft = bout->blen - bout->dlen;
		outbuf = bout->b + bout->dlen;
		icresult = iconv( i8to16, &inbuf, &inbytesleft, &outbuf, &outbytesleft );
		bout->dlen = outbuf - bout->b;
		vbgrow( bout, 20 );
	} while( (size_t)-1 == icresult && E2BIG == errno );

	if( icresult == (size_t)-1 ) {
		WARN("iconv failure: %s", strerror( errno ) );
		//ERR_UNIX( errno, "vb_utf8to16():iconv failure: %s", strerror( errno ) );
		unicode_init();
		return -1;
		/*
		fprintf(stderr, "vb_utf8to16(): iconv failure(%d == %d?): %s\n", errno, E2BIG, strerror( errno ) );
		fprintf(stderr, "  attempted to convert:\n");
		hexdump( (char*)cin, 0, inlen, 1 );
		fprintf(stderr, "  result:\n");
		hexdump( (char*)bout->b, 0, bout->dlen, 1 );
		fprintf(stderr, "  MyDirtyOut:\n");
		for( i=0; i<inlen; i++) {
			if( inbuf[i] != '\0' ) fprintf(stderr, "%c", inbuf[i] );
		}

		fprintf( stderr, "\n" );
		raise( SIGSEGV );
		exit(1);
		*/
	}

	//TODO: error
	if( icresult ) printf("Uhhhh...vb_utf8to16() returning icresult == %d\n", icresult );
	return icresult;	
}
// }}}
#if 1
void cheap_uni2ascii(char *src, char *dest, int l) /* {{{ Quick and dirty UNICODE to std. ascii */
{

	for (; l > 0; l -=2) {
		*dest = *src;
		dest++; src +=2;
	}
	*dest = 0;
}
// }}}
#endif

void cheap_ascii2uni(char *src, char *dest, int l) /* {{{ Quick and dirty ascii to unicode */
{
   for (; l > 0; l--) {
      *dest++ = *src++;
      *dest++ = 0;

   }
}
// }}}

// }}}
// {{{ VARBUF Functions 
vbuf *vballoc( size_t len ) // {{{
{
	struct varbuf *result;

	result = F_MALLOC( sizeof( struct varbuf ) );

	result->dlen = 0;
	result->blen = 0;
	result->buf = NULL;

	vbresize( result, len );

	return result;

} // }}}
void vbcheck( vbuf *vb ) // {{{
{
	ASSERT( vb->b - vb->buf <= vb->blen, "vbcheck(): vb->b outside of buffer range.");
	ASSERT( vb->dlen <= vb->blen, "vbcheck(): data length > buffer length.");

	ASSERT( vb->blen < 1024*1024, "vbcheck(): blen is a bit large...hmmm.");
} // }}}
void vbfree( vbuf *vb ) // {{{
{
	free( vb->buf );
	free( vb );
} // }}}
void vbclear( struct varbuf *vb ) // {{{ditch the data, keep the buffer
{
	vbresize( vb, 0 );
} // }}}
void vbresize( struct varbuf *vb, size_t len ) // {{{ DESTRUCTIVELY grow or shrink buffer
{
	vb->dlen = 0;

	if( vb->blen >= len ) {
		vb->b = vb->buf;
		return;
	}

	vb->buf = F_REALLOC( vb->buf, len );
	vb->b = vb->buf;
	vb->blen = len;
} // }}}
int vbavail( vbuf *vb ) // {{{
{
	return vb->blen - ((char*)vb->b - (char*)vb->buf + vb->dlen);
} // }}}
//void vbdump( vbuf *vb ) // {{{ TODO: to stdout?  Yuck
//{
//	printf("vb dump-------------\n");
//        printf("dlen: %d\n", vb->dlen );
//	printf("blen: %d\n", vb->blen );
//	printf("b - buf: %d\n", vb->b - vb->buf );
//	printf("buf:\n");
//	hexdump( vb->buf, 0, vb->blen, 1 );
//	printf("b:\n");
//	hexdump( vb->b, 0, vb->dlen, 1 );
//	printf("^^^^^^^^^^^^^^^^^^^^\n");
//} // }}}
void vbgrow( struct varbuf *vb, size_t len ) // {{{ out: vbavail(vb) >= len, data are preserved
{
	if( 0 == len ) return;

	if( 0 == vb->blen ) {
		vbresize( vb, len );
		return;
	}

	if( vb->dlen + len > vb->blen ) {
		if( vb->dlen + len < vb->blen * 1.5 ) len = vb->blen * 1.5;
		char *nb = F_MALLOC( vb->blen + len );
		//printf("vbgrow() got %p back from malloc(%d)\n", nb, vb->blen + len);
		vb->blen = vb->blen + len;
		memcpy( nb, vb->b, vb->dlen );

		//printf("vbgrow() I am going to free %p\n", vb->buf );
		free( vb->buf );
		vb->buf = nb;
		vb->b = vb->buf;
	} else {
		if( vb->b != vb->buf ) 
			memcpy( vb->buf, vb->b, vb->dlen );
	}

	vb->b = vb->buf;

	ASSERT( vbavail( vb ) >= len, "vbgrow(): I have failed in my mission." );
} // }}}
void vbset( vbuf *vb, void *b, size_t len ) // {{{ set vbuf b size=len, resize if necessary, relen = how much to over-allocate
{
	vbresize( vb, len );

	memcpy( vb->b, b, len );
	vb->dlen = len;
} // }}}
void vsskipws( vstr *vs ) // {{{
{
	char *p = vs->b;
	while( p - vs->b < vs->dlen && isspace( p[0] ) ) p++;

	vbskip( (vbuf*)vs, p - vs->b );
} // }}}
void vbappend( struct varbuf *vb, void *b, size_t len ) // {{{ append len bytes of b to vbuf, resize if necessary
{
	if( 0 == vb->dlen ) {
		vbset( vb, b, len );
		return;
	}

	vbgrow( vb, len );

	memcpy( vb->b + vb->dlen, b, len );
	vb->dlen += len;

	//printf("vbappend() end: >%s/%d<\n", vbuf->b, vbuf->dlen );
} // }}}
void vbskip( struct varbuf *vb, size_t skip ) // {{{ dumps the first skip bytes from vbuf
{
	ASSERT( skip <= vb->dlen, "vbskip(): Attempt to seek past end of buffer." );
	//memmove( vbuf->b, vbuf->b + skip, vbuf->dlen - skip );
	vb->b += skip;
	vb->dlen -= skip;
} // }}}
void vboverwrite( struct varbuf *vbdest, struct varbuf *vbsrc ) // {{{ overwrite vbdest with vbsrc
{
	vbresize( vbdest, vbsrc->blen );
	memcpy( vbdest->b, vbsrc->b, vbsrc->dlen );
	vbdest->blen = vbsrc->blen;
	vbdest->dlen = vbsrc->dlen;
} // }}}
// }}}
// {{{ VARSTR Functions
vstr *vsalloc( size_t len ) // {{{
{
	vstr *result = (vstr*)vballoc( len + 1 );
	vsset( result, "" );
	return result;
} // }}}
char *vsstr( vstr *vs ) // {{{
{
	return vs->b;
} // }}}
size_t vslen( vstr *vs ) // {{{
{
	return strlen( vsstr( vs ));
} // }}}
void vsfree( vstr *vs ) // {{{
{
	vbfree( (vbuf*)vs );
} // }}}
void vscharcat( vstr *vb, int ch ) // {{{
{
	vbgrow( (vbuf*)vb, 1);
	vb->b[vb->dlen-1] = ch;
	vb->b[vb->dlen] = '\0';
	vb->dlen++;
} // }}}
void vsnprepend( vstr *vb, char *str, size_t len ) // {{{ prependappend string str to vbuf, vbuf must already contain a valid string 
{
	ASSERT( vb->b[vb->dlen-1] == '\0', "vsncat(): attempt to append string to non-string.");
	int sl = strlen( str );
	int n = (sl<len)?sl:len;
	//string append
	vbgrow( (vbuf*)vb, n + 1 );
	memmove( vb->b + n, vb->b, vb->dlen - 1 );
	memcpy( vb->b, str, n );
	//strncat( vb->b, str, n );

	vb->dlen += n;
	vb->b[ vb->dlen - 1 ] = '\0';
} // }}}
void vsskip( vstr *vs, size_t len ) // {{{ len < dlen-1 -> skip len chars, else DIE
{
	ASSERT( len < vs->dlen - 1, "Attempt to skip past end of string" );
	vbskip( (vbuf*)vs, len );
} // }}}
int vsskipline( vstr *vs ) // {{{ in: vb->b == "stuff\nmore_stuff"; out: vb->b == "more_stuff"
{
	int nloff = find_nl( vs );
	int nll = skip_nl( vs->b + nloff );

	if( nloff < 0 ) {
		//TODO: error
		printf("vb_skipline(): there seems to be no newline here.\n");
		return -1;
	}
	if( skip_nl < 0 ) {
		//TODO: error
		printf("vb_skipline(): there seems to be no newline here...except there should be. :P\n");
		return -1;
	}

	memmove( vs->b, vs->b + nloff + nll, vs->dlen - nloff - nll );

	vs->dlen -= nloff + nll;

	return 0;
} // }}}
int vscatprintf( vstr *vs, char *fmt, ... ) // {{{
{
	int size;
	va_list ap;

	/* Guess we need no more than 100 bytes. */
	//vsresize( vb, 100 );
	if(!vs->b || vs->dlen == 0) {
		vsset( vs, "" );
	}

	while (1) {
		/* Try to print in the allocated space. */
		va_start(ap, fmt);
		size = vsnprintf (vs->b + vs->dlen - 1, vs->blen - vs->dlen, fmt, ap);
		va_end(ap);

		/* If that worked, return the string. */
		if (size > -1 && size < vs->blen - vs->dlen ) {
			vs->dlen += size;
			return size;
		}
		/* Else try again with more space. */
		if ( size >= 0 )    /* glibc 2.1 */
			vbgrow( (vbuf*)vs, size+1 ); /* precisely what is needed */
		else           /* glibc 2.0 */
			vbgrow( (vbuf*)vs, vs->blen);
	}
} // }}}
int vslast( vstr *vs ) // {{{ returns the last character stored in a vstr 
{
	if( vs->dlen < 1 ) return -1;
	if( vs->b[vs->dlen-1] != '\0' ) return -1;
	if( vs->dlen == 1 ) return '\0';
	return vs->b[vs->dlen-2];
} // }}}
void vs_printf( vstr *vs, char *fmt, ... ) // {{{ print over vb
{
	int size;
	va_list ap;

	/* Guess we need no more than 100 bytes. */
	vbresize( (vbuf*)vs, 100 );

	while (1) {
		/* Try to print in the allocated space. */
		va_start(ap, fmt);
		size = vsnprintf (vs->b, vs->blen, fmt, ap);
		va_end(ap);

		/* If that worked, return the string. */
		if (size > -1 && size < vs->blen) {
			vs->dlen = size + 1;
			return;
		}
		/* Else try again with more space. */
		if ( size >= 0 )    /* glibc 2.1 */
			vbresize( (vbuf*)vs, size+1 ); /* precisely what is needed */
		else           /* glibc 2.0 */
			vbresize( (vbuf*)vs, vs->blen*2);
	}
} // }}}
void vs_printfa( vstr *vs, char *fmt, ... ) // {{{ printf append to vs
{
	int size;
	va_list ap;

	if( vs->blen - vs->dlen < 50 )
		vbgrow( (vbuf*)vs, 100 );

	while (1) {
		/* Try to print in the allocated space. */
		va_start(ap, fmt);
		size = vsnprintf (vs->b + vs->dlen - 1, vs->blen - vs->dlen + 1, fmt, ap);
		va_end(ap);

		/* If that worked, return the string. */
		if (size > -1 && size < vs->blen) {
			vs->dlen += size;
			return;
		}
		/* Else try again with more space. */
		if ( size >= 0 )    /* glibc 2.1 */
			vbgrow( (vbuf*)vs, size+1 - vs->dlen ); /* precisely what is needed */
		else           /* glibc 2.0 */
			vbgrow( (vbuf*)vs, size );
	}
} // }}}
void vshexdump( vstr *vs, char *b, size_t start, size_t stop, int ascii ) // {{{
{
	char c;
	int diff,i;

	while (start < stop ) {
		diff = stop - start;
		if (diff > 16) diff = 16;

		vs_printfa(vs, ":%08X  ",start);

		for (i = 0; i < diff; i++) {
			if( 8 == i ) vs_printfa( vs, " " );
			vs_printfa(vs, "%02X ",(unsigned char)*(b+start+i));
		}
		if (ascii) {
			for (i = diff; i < 16; i++) vs_printfa(vs, "   ");
			for (i = 0; i < diff; i++) {
				c = *(b+start+i);
				vs_printfa(vs, "%c", isprint(c) ? c : '.');
			}
		}
		vs_printfa(vs, "\n");
		start += 16;
	}
} // }}}
void vsset( vstr *vs, char *s ) // {{{ Store string s in vs
{
	vsnset( vs, s, strlen( s ) );
} // }}}
void vsnset( vstr *vs, char *s, size_t n ) // {{{ Store string s in vs
{
	vbresize( (vbuf*)vs, n + 1 );
	memcpy( vs->b, s, n);
	vs->b[n] = '\0';
	vs->dlen = n+1;
} // }}}
void vsgrow(      vstr *vs, size_t len ) // {{{ grow buffer by len bytes, data are preserved
{
	vbgrow( (vbuf*)vs, len );
} // }}}
size_t vsavail( vstr *vs ) // {{{
{
	return vbavail( (vbuf*)vs );
} // }}}
void vsnset16( vstr *vs, char *s, size_t len ) // {{{ Like vbstrnset, but for UTF16
{
	vbresize( (vbuf*)vs, len+1 );
	memcpy( vs->b, s, len );
	
	vs->b[len] = '\0';
	vs->dlen = len+1;
	vs->b[len] = '\0';
} // }}}
void vscat( vstr *vs, char *str ) // {{{
{
	vsncat( vs, str, strlen(str ) );
} // }}}
int vscmp( vstr *vs, char *str ) // {{{
{
	return strcmp( vs->b, str );
} // }}}
void vsncat( vstr *vs, char *str, size_t len ) // {{{ append string str to vstr, vstr must already contain a valid string 
{
	ASSERT( vs->b[vs->dlen-1] == '\0', "vsncat(): attempt to append string to non-string.");
	int sl = strlen( str );
	int n = (sl<len)?sl:len;
	//string append
	vbgrow( (vbuf*)vs, n + 1 );
	memcpy( vs->b + vs->dlen - 1, str, n );
	//strncat( vs->b, str, n );

	vs->dlen += n;
	vs->b[ vs->dlen - 1 ] = '\0';
} // }}}
void vstrunc( vstr *v, int off ) // {{{ Drop chars [off..dlen] 
{
	if( off >= v->dlen - 1 ) return; //nothing to do
	v->b[off] = '\0';
	v->dlen = off + 1;
}
// }}}
// }}}
// {{{ User input
// TODO: not sure how useful this stuff is here
int fmyinput(char *prmpt, char *ibuf, int maxlen) /* {{{ get user input */
{
	printf("%s",prmpt);

	fgets(ibuf,maxlen+1,stdin);

	ibuf[strlen(ibuf)-1] = 0;

	return(strlen(ibuf));
}
// }}}
//}}}
//
//
//{{{ String formatting and output to FILE *stream or just stdout, etc 
// TODO: a lot of old, unused stuff in here
void vswinhex8(vstr *vs, unsigned char *hbuf, int start, int stop, int loff ) // {{{ Produce regedit-style hex output */
{
	int i;
	int lineflag=0;

	for( i=start; i<stop; i++)
	{
		loff += vscatprintf( vs, "%02x", hbuf[i] );
		if( i < stop - 1 ) {
			loff+=vscatprintf( vs, "," );
			switch( lineflag ) {
				case 0:
				if( loff >= 77) {
					lineflag=1;
					loff=0;
					vscatprintf( vs, "\\%s  ", STUPID_CR );
				}
				break;
				case 1:
				if( loff >= 75 ) {
					loff=0;
					vscatprintf( vs, "\\%s  ", STUPID_CR );
				}
				break;
			}
			//	if( 24 < i || 0 == (i - 17) % 25 ) fprintf( stream, "\\\n  " );
		}
	}

	//   fprintf( stream, "\n" );
} // }}}