shithub: asif

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add estrdup and have erealloc zero out new memory

--- a/asif.h

+++ b/asif.h

@@ -44,8 +44,9 @@

 void	four1(double*, int, int);

 void	realft(double*, int, int);

-void*	erealloc(void*, ulong);

+char*	estrdup(char*);

+void*	erealloc(void*, ulong, ulong);

 void*	emalloc(ulong);

-#define MIN(a,b)	((a) < (b) ? (a) : (b))

-#define MAX(a,b)	((a) > (b) ? (a) : (b))

+#define MIN(a,b)	((a) <= (b) ? (a) : (b))

+#define MAX(a,b)	((a) >= (b) ? (a) : (b))

--- a/emalloc.c

+++ b/emalloc.c

@@ -2,12 +2,23 @@

 #include <libc.h>

 #include "asif.h"

+char *

+estrdup(char *s)

+{

+	if((s = strdup(s)) == nil)

+		sysfatal("estrdup: %r");

+	setmalloctag(s, getcallerpc(&s));

+	return s;

+}

+

 void *

-erealloc(void *p, ulong n)

+erealloc(void *p, ulong n, ulong oldn)

 {

 	if((p = realloc(p, n)) == nil)

 		sysfatal("realloc: %r");

 	setrealloctag(p, getcallerpc(&p));

+	if(n > oldn)

+		memset((uchar *)p + oldn, 0, n - oldn);

 	return p;

 }

--- a/varray.c

+++ b/varray.c

@@ -9,6 +9,8 @@

 void

 vfree(VArray *v)

 {

+	if(v == nil)

+		return;

 	free(v->p);

 	free(v);

 }

@@ -18,10 +20,11 @@

 {

 	int off;

+	assert(v != nil && u != nil);

 	off = v->n * v->elsize;

 	if(v->n++ >= v->bufsize){

+		v->p = erealloc(v->p, v->bufsize * 2, v->bufsize);

 		v->bufsize *= 2;

-		v->p = erealloc(v->p, v->bufsize);

 		v->vsize *= 2;

 	}

 	memcpy((char*)v->p+off, u, v->elsize);