mdw@git.distorted.org.uk Git - qmail/blob - substdo.c

   1 #include "substdio.h"
   2 #include "str.h"
   3 #include "byte.h"
   4 #include "error.h"
   5
   6 static int allwrite(op,fd,buf,len)
   7 register int (*op)();
   8 register int fd;
   9 register char *buf;
  10 register int len;
  11 {
  12   register int w;
  13
  14   while (len) {
  15     w = op(fd,buf,len);
  16     if (w == -1) {
  17       if (errno == error_intr) continue;
  18       return -1; /* note that some data may have been written */
  19     }
  20     if (w == 0) ; /* luser's fault */
  21     buf += w;
  22     len -= w;
  23   }
  24   return 0;
  25 }
  26
  27 int substdio_flush(s)
  28 register substdio *s;
  29 {
  30   register int p;
  31
  32   p = s->p;
  33   if (!p) return 0;
  34   s->p = 0;
  35   return allwrite(s->op,s->fd,s->x,p);
  36 }
  37
  38 int substdio_bput(s,buf,len)
  39 register substdio *s;
  40 register char *buf;
  41 register int len;
  42 {
  43   register int n;
  44
  45   while (len > (n = s->n - s->p)) {
  46     byte_copy(s->x + s->p,n,buf); s->p += n; buf += n; len -= n;
  47     if (substdio_flush(s) == -1) return -1;
  48   }
  49   /* now len <= s->n - s->p */
  50   byte_copy(s->x + s->p,len,buf);
  51   s->p += len;
  52   return 0;
  53 }
  54
  55 int substdio_put(s,buf,len)
  56 register substdio *s;
  57 register char *buf;
  58 register int len;
  59 {
  60   register int n;
  61
  62   n = s->n;
  63   if (len > n - s->p) {
  64     if (substdio_flush(s) == -1) return -1;
  65     /* now s->p == 0 */
  66     if (n < SUBSTDIO_OUTSIZE) n = SUBSTDIO_OUTSIZE;
  67     while (len > s->n) {
  68       if (n > len) n = len;
  69       if (allwrite(s->op,s->fd,buf,n) == -1) return -1;
  70       buf += n;
  71       len -= n;
  72     }
  73   }
  74   /* now len <= s->n - s->p */
  75   byte_copy(s->x + s->p,len,buf);
  76   s->p += len;
  77   return 0;
  78 }
  79
  80 int substdio_putflush(s,buf,len)
  81 register substdio *s;
  82 register char *buf;
  83 register int len;
  84 {
  85   if (substdio_flush(s) == -1) return -1;
  86   return allwrite(s->op,s->fd,buf,len);
  87 }
  88
  89 int substdio_bputs(s,buf)
  90 register substdio *s;
  91 register char *buf;
  92 {
  93   return substdio_bput(s,buf,str_len(buf));
  94 }
  95
  96 int substdio_puts(s,buf)
  97 register substdio *s;
  98 register char *buf;
  99 {
 100   return substdio_put(s,buf,str_len(buf));
 101 }
 102
 103 int substdio_putsflush(s,buf)
 104 register substdio *s;
 105 register char *buf;
 106 {
 107   return substdio_putflush(s,buf,str_len(buf));
 108 }