Subversion Repositories planix.SVN

/*
 * pANS stdio -- fwrite
 */
#include "iolib.h"
#include <string.h>

#define BIGN (BUFSIZ/2)

size_t fwrite(const void *p, size_t recl, size_t nrec, FILE *f){
        char *s;
        int n, d;

        s=(char *)p;
        n=recl*nrec;
        while(n>0){
                d=f->rp-f->wp;
                if(d>0){
                        if(d>n)
                                d=n;
                        memcpy(f->wp, s, d);
                        f->wp+=d;
                }else{
                        if(n>=BIGN && f->state==WR && !(f->flags&(STRING|LINEBUF)) && f->buf!=f->unbuf){
                                d=f->wp-f->buf;
                                if(d>0){
                                        if(f->flags&APPEND)
                                                lseek(f->fd, 0L, SEEK_END);
                                        if(write(f->fd, f->buf, d)!=d){
                                                f->state=ERR;
                                                goto ret;
                                        }
                                        f->wp=f->rp=f->buf;
                                }
                                if(f->flags&APPEND)
                                        lseek(f->fd, 0L, SEEK_END);
                                d=write(f->fd, s, n);
                                if(d<=0){
                                        f->state=ERR;
                                        goto ret;
                                }
                        }else{
                                if(_IO_putc(*s, f)==EOF)
                                        goto ret;
                                d=1;
                        }
                }
                s+=d;
                n-=d;
        }
    ret:
        if(recl)
                return (s-(char*)p)/recl;
        else
                return s-(char*)p;
}