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[libscc] Remove outdated bits about pack/unpack

These functions were removed fom libscc long time ago
but there were some functions that still were in the library
and some declarations in scc.h.

--- a/include/scc/scc/scc.h

+++ b/include/scc/scc/scc.h

@@ -35,8 +35,4 @@

 extern void *new(Alloc *allocp);

 extern void delete(Alloc *allocp, void *p);

 extern int casecmp(const char *s1, const char *s2);

-extern int lpack(unsigned char *dst, char *fmt, ...);

-extern int lunpack(unsigned char *src, char *fmt, ...);

-extern int bpack(unsigned char *dst, char *fmt, ...);

-extern int bunpack(unsigned char *src, char *fmt, ...);

 extern unsigned genhash(char *name);

--- a/src/libscc/bpack.c

+++ /dev/null

@@ -1,64 +1,0 @@

-#include <ctype.h>

-#include <stdarg.h>

-

-#include <scc/scc.h>

-

-int

-bpack(unsigned char *dst, char *fmt, ...)

-{

-	unsigned char *bp, *cp;

-	unsigned s;

-	unsigned long l;

-	unsigned long long q;

-	size_t n;

-	int d;

-	va_list va;

-

-	bp = dst;

-	va_start(va, fmt);

-	while (*fmt) {

-		switch (*fmt++) {

-		case '\'':

-			for (n = 0; isdigit(*fmt); n += d) {

-				n *= 10;

-				d = *fmt++ - '0';

-			}

-			cp = va_arg(va, unsigned char *);

-			while (n--)

-				*bp++ = *cp++;

-			break;

-		case 'c':

-			*bp++ = va_arg(va, unsigned);

-			break;

-		case 's':

-			s = va_arg(va, unsigned);

-			*bp++ = s >> 8;

-			*bp++ = s;

-			break;

-		case 'l':

-			l = va_arg(va, unsigned long);

-			*bp++ = l >> 24;

-			*bp++ = l >> 16;

-			*bp++ = l >> 8;

-			*bp++ = l;

-			break;

-		case 'q':

-			q = va_arg(va, unsigned long long);

-			*bp++ = q >> 56;

-			*bp++ = q >> 48;

-			*bp++ = q >> 40;

-			*bp++ = q >> 32;

-			*bp++ = q >> 24;

-			*bp++ = q >> 16;

-			*bp++ = q >> 8;

-			*bp++ = q;

-			break;

-		default:

-			va_end(va);

-			return -1;

-		}

-	}

-	va_end(va);

-

-	return bp - dst;

-}