return of venti

1 files changed, 252 insertions, 0 deletions

diff --git a/src/cmd/venti/srv/utils.c b/src/cmd/venti/srv/utils.c
new file mode 100644
index 00000000..03fd9065
--- /dev/null
+++ b/src/cmd/venti/srv/utils.c
@@ -0,0 +1,252 @@
+#include "stdinc.h"
+#include "dat.h"
+#include "fns.h"
+
+int
+namecmp(char *s, char *t)
+{
+	return strncmp(s, t, ANameSize);
+}
+
+void
+namecp(char *dst, char *src)
+{
+	strncpy(dst, src, ANameSize - 1);
+	dst[ANameSize - 1] = '\0';
+}
+
+int
+nameok(char *name)
+{
+	char *t;
+	int c;
+
+	if(name == nil)
+		return -1;
+	for(t = name; c = *t; t++)
+		if(t - name >= ANameSize
+		|| c < ' ' || c >= 0x7f)
+			return -1;
+	return 0;
+}
+
+int
+stru32int(char *s, u32int *r)
+{
+	char *t;
+	u32int n, nn, m;
+	int c;
+
+	m = TWID32 / 10;
+	n = 0;
+	for(t = s; ; t++){
+		c = *t;
+		if(c < '0' || c > '9')
+			break;
+		if(n > m)
+			return -1;
+		nn = n * 10 + c - '0';
+		if(nn < n)
+			return -1;
+		n = nn;
+	}
+	*r = n;
+	return s != t && *t == '\0';
+}
+
+int
+stru64int(char *s, u64int *r)
+{
+	char *t;
+	u64int n, nn, m;
+	int c;
+
+	m = TWID64 / 10;
+	n = 0;
+	for(t = s; ; t++){
+		c = *t;
+		if(c < '0' || c > '9')
+			break;
+		if(n > m)
+			return -1;
+		nn = n * 10 + c - '0';
+		if(nn < n)
+			return -1;
+		n = nn;
+	}
+	*r = n;
+	return s != t && *t == '\0';
+}
+
+int
+vttypevalid(int type)
+{
+	return type < VtMaxType;
+}
+
+static char*
+logit(int severity, char *fmt, va_list args)
+{
+	char *s;
+
+	s = vsmprint(fmt, args);
+	if(s == nil)
+		return nil;
+	if(argv0 == nil)
+		fprint(2, "%s: err %d: %s\n", argv0, severity, s);
+	else
+		fprint(2, "err %d: %s\n", severity, s);
+	return s;
+}
+
+void
+seterr(int severity, char *fmt, ...)
+{
+	char *s;
+	va_list args;
+
+	va_start(args, fmt);
+	s = logit(severity, fmt, args);
+	va_end(args);
+	if(s == nil)
+		werrstr("error setting error");
+	else{
+		werrstr("%s", s);
+		free(s);
+	}
+}
+
+void
+logerr(int severity, char *fmt, ...)
+{
+	char *s;
+	va_list args;
+
+	va_start(args, fmt);
+	s = logit(severity, fmt, args);
+	va_end(args);
+	free(s);
+}
+
+u32int
+now(void)
+{
+	return time(nil);
+}
+
+int abortonmem = 1;
+
+void *
+emalloc(ulong n)
+{
+	void *p;
+
+	p = malloc(n);
+	if(p == nil){
+		if(abortonmem)
+			abort();
+		sysfatal("out of memory allocating %lud", n);
+	}
+	memset(p, 0xa5, n);
+if(0)print("emalloc %p-%p by %lux\n", p, (char*)p+n, getcallerpc(&n));
+	return p;
+}
+
+void *
+ezmalloc(ulong n)
+{
+	void *p;
+
+	p = malloc(n);
+	if(p == nil){
+		if(abortonmem)
+			abort();
+		sysfatal("out of memory allocating %lud", n);
+	}
+	memset(p, 0, n);
+if(0)print("ezmalloc %p-%p by %lux\n", p, (char*)p+n, getcallerpc(&n));
+	return p;
+}
+
+void *
+erealloc(void *p, ulong n)
+{
+	p = realloc(p, n);
+	if(p == nil){
+		if(abortonmem)
+			abort();
+		sysfatal("out of memory allocating %lud", n);
+	}
+if(0)print("erealloc %p-%p by %lux\n", p, (char*)p+n, getcallerpc(&p));
+	return p;
+}
+
+char *
+estrdup(char *s)
+{
+	char *t;
+	int n;
+
+	n = strlen(s) + 1;
+	t = emalloc(n);
+	memmove(t, s, n);
+if(0)print("estrdup %p-%p by %lux\n", t, (char*)t+n, getcallerpc(&s));
+	return t;
+}
+
+/*
+ * return floor(log2(v))
+ */
+int
+u64log2(u64int v)
+{
+	int i;
+
+	for(i = 0; i < 64; i++)
+		if((v >> i) <= 1)
+			break;
+	return i;
+}
+
+int
+vtproc(void (*fn)(void*), void *arg)
+{
+	proccreate(fn, arg, 256*1024);
+	return 0;
+}
+
+int
+ientryfmt(Fmt *fmt)
+{
+	IEntry *ie;
+
+	ie = va_arg(fmt->args, IEntry*);
+	return fmtprint(fmt, "%V %22lld %3d %5d %3d",
+		ie->score, ie->ia.addr, ie->ia.type, ie->ia.size, ie->ia.blocks);
+}
+
+void
+ventifmtinstall(void)
+{
+	fmtinstall('F', vtfcallfmt);
+	fmtinstall('H', encodefmt);
+	fmtinstall('I', ientryfmt);
+	fmtinstall('V', vtscorefmt);
+}
+
+uint
+msec(void)
+{
+	return nsec()/1000000;
+}
+
+uint
+countbits(uint n)
+{
+	n = (n&0x55555555)+((n>>1)&0x55555555);
+	n = (n&0x33333333)+((n>>2)&0x33333333);
+	n = (n&0x0F0F0F0F)+((n>>4)&0x0F0F0F0F);
+	n = (n&0x00FF00FF)+((n>>8)&0x00FF00FF);
+	n = (n&0x0000FFFF)+((n>>16)&0x0000FFFF);
+	return n;
+}