Changeset 8fd04ba9 in mainline for uspace/srv/devman/util.c


Ignore:
Timestamp:
2011-07-24T12:48:28Z (13 years ago)
Author:
Jiri Svoboda <jiri@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
4022513
Parents:
e16e2ba4
Message:

read_all() and write_all().

File:
1 edited

Legend:

Unmodified
Added
Removed
  • uspace/srv/devman/util.c

    re16e2ba4 r8fd04ba9  
    111111}
    112112
    113 ssize_t safe_read(int fd, void *buffer, size_t size)
    114 {
    115         if (size == 0) {
    116                 return 0;
    117         }
    118 
    119         uint8_t *buf_ptr = (uint8_t *) buffer;
    120 
    121         size_t total_read = 0;
    122         while (total_read < size) {
    123                 ssize_t bytes_read = read(fd, buf_ptr, size - total_read);
    124                 if (bytes_read < 0) {
    125                         /* Error. */
    126                         return bytes_read;
    127                 } else if (bytes_read == 0) {
    128                         /* Possibly end of file. */
    129                         break;
    130                 } else {
    131                         /* Read at least something. */
    132                         buf_ptr += bytes_read;
    133                         total_read += bytes_read;
    134                 }
    135         }
    136 
    137         return (ssize_t) total_read;
    138 }
    139 
    140113/** @}
    141114 */
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