SeqChars

/*  Author: Leandro Soares
School: INETE
Date:   18-04-2012
Time:   11:25   */
#include <stdio.h>
#include <stdlib.h>

#define MaxLenght 1024

struct tagDados {
    char CHAR;
    int count;
    struct tagDados *pnext;
    struct tagDados *pprev;
};

struct tagDadosWrite {
    char CHAR;
    int count;
};

struct tagDados *Countline(FILE *finput);
struct tagDados *NewNode(void);
void InsertNode(struct tagDados **phead, struct tagDados *pnew);
void OutputTheResult(struct tagDados *phead);

int main() {
    FILE *finput, *foutput;
    char read[MaxLenght];
    struct tagDados *phead;
    struct tagDados *pnew;

    phead = pnew = NULL;
    finput = fopen("input.txt", "r+");

    while( fgets(read,MaxLenght+2,finput) != NULL ) {
        pnew = Countline(read);
        InsertNode(&phead, pnew);
    }
    OutputTheResult(phead);

    return 0;
}

struct tagDados *Countline(char read[]) {
    int idx, count, LASTcount;
    char cmp, LASTcmp;
    struct tagDados *Dados;

    Dados = NewNode();

    count = LASTcount = 0;
    cmp = LASTcmp = '\0';

    for(idx=0; read[idx] != '\0' && idx <= 1024; idx++) {
        if( read[idx] >= 32 && read[idx] <= 125 ) {
            if( cmp == '\0' ) {
                cmp = read[idx];
                count++;
            }
            else    if( read[idx] == cmp )
                count++;
            else    if( read[idx] != cmp ) {
                if( count > LASTcount ) {
                    LASTcmp = cmp;
                    LASTcount = count;
                }

                cmp = read[idx];
                count = 1;
            }
        }
    }
    if( count > LASTcount ) {
        LASTcmp = cmp;
        LASTcount = count;
    }
    Dados->CHAR = LASTcmp;
    Dados->count = LASTcount;

    return Dados;
}
struct tagDados *NewNode(void) {
    struct tagDados *Dados;

    Dados = (struct tagDados*) malloc(sizeof(struct tagDados));

    Dados->pnext = NULL;
    Dados->pprev = NULL;

    return Dados;
}
void InsertNode(struct tagDados **phead, struct tagDados *pnew) {
    struct tagDados *paux;
    paux = (*phead);

    if( (*phead) != NULL ) {
        pnew->pnext = (*phead);
        pnew->pprev = NULL;
    }
    (*phead) = pnew;
}
void OutputTheResult(struct tagDados *phead) {
    FILE *foutput, *foutputDEBUG;
    struct tagDadosWrite *pnew;
    foutput = fopen("output.txt", "wb");
    foutputDEBUG = fopen("outputDEBUG.txt", "w");

    pnew = (struct tagDadosWrite*) malloc(sizeof(struct tagDadosWrite));

    while( phead != NULL ) {
        pnew->CHAR = phead->CHAR;
        pnew->count = phead->count;
        fwrite(pnew,sizeof(struct tagDadosWrite), 1, foutput);
        fprintf(foutputDEBUG, "%c %d\n", pnew->CHAR, pnew->count);

        phead = phead->pnext;
    }
}