100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <strings.h>
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int open_close(const char *filename){
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FILE *file = fopen(filename, "r");
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if(!file){
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//fclose(file) ;
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return 0;
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}
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fclose(file);
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return 1;
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}
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int read_n_bytes(const char *filename, size_t n){
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FILE *file = fopen(filename, "r");
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if (!file) return 1;
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char *cara = malloc((n + 1) * sizeof(char));
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if(!cara){
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fclose(file);
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return 1;
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}
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fread(cara, sizeof(char), n, file);
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cara[n+1] = '\0';
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printf("%s\n", cara);
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free(cara);
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fclose(file);
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return 0;
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}
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int read_bytes(const char *filename){
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FILE *file = fopen(filename, "r");
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if(!file) return 1;
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//fclose(file);
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int c = fgetc(file);
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int index = 0;
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while(c != EOF){
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index ++;
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c = fgetc(file);
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}
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/*
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char *cara = malloc((index + 1) * sizeof(char));
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if(!cara) {
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fclose(file);
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return 1;
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}*/
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/*
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fread(cara, sizeof(char), index, file);
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cara[index + 1] = '\0';
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printf("%s\n", cara);
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free(cara);
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fclose(file);
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*/
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fclose(file);
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int status = read_n_bytes(filename, index);
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if(status == 0) return 0;
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return 1;
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}
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/*
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$ cat does_exist.txt
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Hey, as you can see, this file is not empty and therefore you can open it, read it, and close it!
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*/
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/*
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int main()
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{
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int a = read_n_bytes("does_exist.txt", 32);
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printf(" | %d\n", a);
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// Expected:
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//Hey, as you can see, this file i
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// | 0
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int b = read_n_bytes("does_not_exist.txt", 5);
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printf(" | %d\n", b);
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// Expected:
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// | 1
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a = read_bytes("does_exist.txt");
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printf("--> Return code: %d\n", a);
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// Expected:
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//Hey, as you can see, this file is not empty and therefore you can open it, read it, and close it!
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//--> Return code: 0
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b = read_bytes("does_not_exist.txt");
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printf("--> Return code: %d\n", b);
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// Expected:
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//--> Return code: 1
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return 0;
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}
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*/
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