The Tor Browser: nsprpub/pr/src/io/prstdio.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "primpl.h"

     8 #include <string.h>

    10 /*

    11 ** fprintf to a PRFileDesc

    12 */

    13 PR_IMPLEMENT(PRUint32) PR_fprintf(PRFileDesc* fd, const char *fmt, ...)

    14 {

    15     va_list ap;

    16     PRUint32 rv;

    18     va_start(ap, fmt);

    19     rv = PR_vfprintf(fd, fmt, ap);

    20     va_end(ap);

    21     return rv;

    22 }

    24 PR_IMPLEMENT(PRUint32) PR_vfprintf(PRFileDesc* fd, const char *fmt, va_list ap)

    25 {

    26     /* XXX this could be better */

    27     PRUint32 rv, len;

    28     char* msg = PR_vsmprintf(fmt, ap);

    29     if (NULL == msg) {

    30         return -1;

    31     }

    32     len = strlen(msg);

    33 #ifdef XP_OS2

    34     /*

    35      * OS/2 really needs a \r for every \n.

    36      * In the future we should try to use scatter-gather instead of a

    37      * succession of PR_Write.

    38      */

    39     if (isatty(PR_FileDesc2NativeHandle(fd))) {

    40         PRUint32 last = 0, idx;

    41         PRInt32 tmp;

    42         rv = 0;

    43         for (idx = 0; idx < len+1; idx++) {

    44             if ((idx - last > 0) && (('\n' == msg[idx]) || (idx == len))) {

    45                 tmp = PR_Write(fd, msg + last, idx - last);

    46                 if (tmp >= 0) {

    47                     rv += tmp;

    48                 }

    49                 last = idx;

    50             }

    51             /*

    52              * if current character is \n, and

    53              * previous character isn't \r, and

    54              * next character isn't \r

    55              */

    56             if (('\n' == msg[idx]) &&

    57                 ((0 == idx) || ('\r' != msg[idx-1])) &&

    58                 ('\r' != msg[idx+1])) {

    59                 /* add extra \r */

    60                 tmp = PR_Write(fd, "\r", 1);

    61                 if (tmp >= 0) {

    62                     rv += tmp;

    63                 }

    64             }

    65         }

    66     } else {

    67         rv = PR_Write(fd, msg, len);

    68     }

    69 #else

    70     rv = PR_Write(fd, msg, len);

    71 #endif

    72     PR_DELETE(msg);

    73     return rv;

    74 }

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