Unnamed

#include <stdio.h>#include <stdlib.h>#include <string.h>struct luggage_t{    int bIsRelevant; /* Set to 0 for superseded and filtered-out records */    char *sField[6]; /* Timestamp, ID, Flight, Departing, Arriving, Comment */    struct luggage_t *pNext; /* For a linked-list of luggage records */};void list_insert(struct luggage_t **ppList, struct luggage_t *pLuggage){    while(NULL != *ppList) {        /* Luggage ID and departing airport identify a piece of luggage */        if(strcmp((**ppList).sField[1], pLuggage->sField[1]) == 0        && strcmp((**ppList).sField[3], pLuggage->sField[3]) == 0)            (**ppList).bIsRelevant = 0;        ppList = &(**ppList).pNext;    }    *ppList = pLuggage;    pLuggage->bIsRelevant = 1;    pLuggage->pNext = NULL;}int main(int argc, const char** argv){    struct luggage_t *pLuggage, *pLuggageList = NULL;    int iField, iBufferSize = 16;    /* 1) Load all luggage data */    for(;;) {        char *sLine = malloc(iBufferSize), *sNextWord;        if(!fgets(sLine, iBufferSize, stdin))            break;        if(sLine[strlen(sLine) - 1] != '\n' && !feof(stdin)) {            /* Buffer not large enough - double it until it is */            do {                int iBufferUsed = iBufferSize - 1; /* -1 for '\0' */                iBufferSize = iBufferSize * 2;                sLine = realloc(sLine, iBufferSize);                fgets(sLine + iBufferUsed, iBufferSize - iBufferUsed, stdin);            } while(sLine[strlen(sLine) - 1] != '\n' && !feof(stdin));        }        pLuggage = malloc(sizeof(struct luggage_t));        /* Blank or incomplete lines are ignored */        pLuggage->sField[0] = strtok(sLine, " \r\n");        if(!pLuggage->sField[0]) continue;        pLuggage->sField[1] = strtok(NULL, " \r\n");        if(!pLuggage->sField[1]) continue;        pLuggage->sField[2] = strtok(NULL, " \r\n");        if(!pLuggage->sField[2]) continue;        pLuggage->sField[3] = strtok(NULL, " \r\n");        if(!pLuggage->sField[3]) continue;        pLuggage->sField[4] = strtok(NULL, " \r\n");        if(!pLuggage->sField[4]) continue;        /* Previous fields are required, whereas comment is optional */        pLuggage->sField[5] = strtok(NULL, " \r\n");        if(pLuggage->sField[5]) {            /* Finish the token splitting, and just reinsert the spaces */            while((sNextWord = strtok(NULL, " ")))                sNextWord[-1] = ' ';        }        list_insert(&pLuggageList, pLuggage);    }    /* 2) Filter records using command line arguments */    for(pLuggage = pLuggageList; pLuggage; pLuggage = pLuggage->pNext) {        for(iField = 1; iField < 5 && iField < argc; ++iField) {            if(*argv[iField] == '-' && argv[iField][1] == '\0') /* Wildcard */                continue;            if(strcmp(argv[iField], pLuggage->sField[iField]) != 0)                pLuggage->bIsRelevant = 0;        }    }    /* 3) Print all records (which weren't superseded or filtered-out) */    for(pLuggage = pLuggageList; pLuggage; pLuggage = pLuggage->pNext) {        if(!pLuggage->bIsRelevant)            continue;        for(iField = 0; iField < 5; ++iField)            printf("%s ", pLuggage->sField[iField]);        if(pLuggage->sField[5])            fputs(pLuggage->sField[5], stdout); /* fgets kept the '\n' */        else            putc('\n', stdout);        putc('\r', stdout);    }    fputs("\n\r", stdout);    /* 4) We could free all our memory now, but the O.S. will do it for us */    return 0;}