root/src/liblink/go.c

DEFINITIONS

1. expandpkg
2. emallocz
3. estrdup
4. erealloc
5. double2ieee

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// go-specific code shared across loaders (5l, 6l, 8l).

#include <u.h>
#include <libc.h>
#include <bio.h>
#include <link.h>

// replace all "". with pkg.
char*
expandpkg(char *t0, char *pkg)
{
        int n;
        char *p;
        char *w, *w0, *t;

        n = 0;
        for(p=t0; (p=strstr(p, "\"\".")) != nil; p+=3)
                n++;

        if(n == 0)
                return estrdup(t0);

        w0 = emallocz(strlen(t0) + strlen(pkg)*n);
        w = w0;
        for(p=t=t0; (p=strstr(p, "\"\".")) != nil; p=t) {
                memmove(w, t, p - t);
                w += p-t;
                strcpy(w, pkg);
                w += strlen(pkg);
                t = p+2;
        }
        strcpy(w, t);
        return w0;
}

void*
emallocz(long n)
{
        void *p;

        p = malloc(n);
        if(p == nil)
                sysfatal("out of memory");
        memset(p, 0, n);
        return p;
}

char*
estrdup(char *p)
{
        p = strdup(p);
        if(p == nil)
                sysfatal("out of memory");
        return p;
}

void*
erealloc(void *p, long n)
{
        p = realloc(p, n);
        if(p == nil)
                sysfatal("out of memory");
        return p;
}

void
double2ieee(uint64 *ieee, float64 f)
{
        memmove(ieee, &f, 8);
}