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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 26 | pmbaty | 1 | /* ACC -- Automatic Compiler Configuration |
| 2 | |||
| 3 | Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer |
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| 4 | All Rights Reserved. |
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| 5 | |||
| 6 | This software is a copyrighted work licensed under the terms of |
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| 7 | the GNU General Public License. Please consult the file "ACC_LICENSE" |
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| 8 | for details. |
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| 9 | |||
| 10 | Markus F.X.J. Oberhumer |
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| 11 | <markus@oberhumer.com> |
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| 12 | http://www.oberhumer.com/ |
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| 13 | */ |
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| 14 | |||
| 15 | |||
| 16 | #define __ACCLIB_HSREAD_CH_INCLUDED 1 |
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| 17 | #if !defined(ACCLIB_PUBLIC) |
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| 18 | # define ACCLIB_PUBLIC(r,f) r __ACCLIB_FUNCNAME(f) |
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| 19 | #endif |
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| 20 | |||
| 21 | |||
| 22 | /*********************************************************************** |
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| 23 | // huge pointer layer - safe read/write |
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| 24 | // handles partial pipe writes and interrupted system calls |
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| 25 | ************************************************************************/ |
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| 26 | |||
| 27 | ACCLIB_PUBLIC(long, acc_safe_hread) (int fd, acc_hvoid_p buf, long size) |
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| 28 | { |
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| 29 | acc_hbyte_p b = (acc_hbyte_p) buf; |
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| 30 | long l = 0; |
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| 31 | int saved_errno; |
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| 32 | |||
| 33 | saved_errno = errno; |
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| 34 | while (l < size) |
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| 35 | { |
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| 36 | long n = size - l; |
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| 37 | #if (ACC_HAVE_MM_HUGE_PTR) |
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| 38 | # define __ACCLIB_REQUIRE_HREAD_CH 1 |
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| 39 | errno = 0; n = acc_hread(fd, b, n); |
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| 40 | #elif (ACC_OS_DOS32) && defined(__DJGPP__) |
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| 41 | errno = 0; n = _read(fd, b, n); |
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| 42 | #else |
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| 43 | errno = 0; n = read(fd, b, n); |
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| 44 | #endif |
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| 45 | if (n == 0) |
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| 46 | break; |
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| 47 | if (n < 0) { |
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| 48 | #if defined(EINTR) |
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| 49 | if (errno == (EINTR)) continue; |
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| 50 | #endif |
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| 51 | if (errno == 0) errno = 1; |
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| 52 | return l; |
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| 53 | } |
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| 54 | b += n; l += n; |
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| 55 | } |
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| 56 | errno = saved_errno; |
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| 57 | return l; |
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| 58 | } |
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| 59 | |||
| 60 | |||
| 61 | ACCLIB_PUBLIC(long, acc_safe_hwrite) (int fd, const acc_hvoid_p buf, long size) |
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| 62 | { |
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| 63 | const acc_hbyte_p b = (const acc_hbyte_p) buf; |
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| 64 | long l = 0; |
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| 65 | int saved_errno; |
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| 66 | |||
| 67 | saved_errno = errno; |
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| 68 | while (l < size) |
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| 69 | { |
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| 70 | long n = size - l; |
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| 71 | #if (ACC_HAVE_MM_HUGE_PTR) |
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| 72 | # define __ACCLIB_REQUIRE_HREAD_CH 1 |
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| 73 | errno = 0; n = acc_hwrite(fd, b, n); |
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| 74 | #elif (ACC_OS_DOS32) && defined(__DJGPP__) |
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| 75 | errno = 0; n = _write(fd, b, n); |
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| 76 | #else |
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| 77 | errno = 0; n = write(fd, b, n); |
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| 78 | #endif |
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| 79 | if (n == 0) |
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| 80 | break; |
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| 81 | if (n < 0) { |
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| 82 | #if defined(EINTR) |
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| 83 | if (errno == (EINTR)) continue; |
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| 84 | #endif |
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| 85 | if (errno == 0) errno = 1; |
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| 86 | return l; |
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| 87 | } |
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| 88 | b += n; l += n; |
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| 89 | } |
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| 90 | errno = saved_errno; |
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| 91 | return l; |
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| 92 | } |
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| 93 | |||
| 94 | |||
| 95 | /* |
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| 96 | vi:ts=4:et |
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| 97 | */ |