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JAM_FindUser(3) JAM subroutine library JAM_FindUser(3)

JAM_FindUser - Find message to a user

#include <jamlib/jam.h>
int JAM_FindUser(s_JamBase* Base_PS,
                 ulong      UserCrc_I,
                 ulong      StartMsg_I,
                 ulong*     MsgNo_PI);

Scans the message base looking for a message written to a specific user.

Base_PS
The message base to use
UserCrc_I
The CRC32 value for the searched name
StartMsg_I
The first message number to look at. This value is not the message´s unique number, but rather the absolute position of the message in the message base. Message 0 therefore means the first message.
MsgNo_PI
A pointer to a variable where the message number for the found message will be stored. This number is the absolute message position in the message base. Message 0 means the first message.

0
if successful
JAM_IO_ERROR
if an I/O error occured. See JAM_Errno(3)
JAM_NO_USER
if no message was found

uchar Name_AC[32];
int   Result_I;
ulong Crc_I;
ulong Msg_I;
strcpy(Name_AC, "Bjorn Stenberg");
Crc_I = JAM_Crc32(Name_AC, strlen(Name_AC));
Result_I = JAM_FindUser(Base_PS, Crc_I, 0, &Msg_I);
switch (Result_I) {
  case JAM_NO_USER:
    printf("No message for me.\n");
    break;
  case JAM_IO_ERROR:
    printf("IO error %d\n", JAM_Errno());
    break;
}

This manual page was created by Sir Raorn <raorn@altlinux.ru>, based on original JAMlib documentation by Bjorn Stenberg <bjorn@haxx.nu> and Johan Billing <billing@df.lth.se>.

jamlib(3), JAM_Crc32(3), JAM_Errno(3)
2002-11-07

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