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Hardwarenahe_Programmierung
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a3: Einrückung

This commit is contained in:
Johannes Theiner 2018-11-15 08:00:36 +01:00
parent 19318517ca
commit 03014fb411
1 changed files with 8 additions and 9 deletions
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17
src/c/a3.c
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@ -11,17 +11,17 @@ void memdump(unsigned char *string) {
char array[columns * rows];
for(int i = 0; i < rows; i++) {
printf("0x%p\t", (void *) &string[i * columns]);
printf("%p\t", (void *) &string[i * columns]);
for (int j = i * columns; j < (i + 1) * columns; j++) {
printf("%02x ", string[j]);
if(string[j] <= 0x20 || string[j] >= 0x7e) array[j] = '.';
if(string[j] < 0x20 || string[j] > 0x7e) array[j] = '.';
else array[j] = string[j];
}
printf(" ");
for (int j = i * columns; j < (i + 1) * columns; j++) {
printf("%c", string[j]);
printf("%c", array[j]);
}
printf("\n");
@ -50,17 +50,16 @@ int main(int argc, char **argv) {
memdump((unsigned char *) argv[1]);
printf("Laenge der Zeichenkette (inkl \\0): %i Byte(s)\n", (int) strlen(argv[1]));
printf("Ersetzen: '%c' mit '%c'\n", *argv[2], *argv[3]);
printf("\tLaenge der Zeichenkette (inkl \\0): %i Byte(s)\n", (int) strlen(argv[1]));
printf("\tErsetzen: '%c' mit '%c'\n", *argv[2], *argv[3]);
unsigned char *copy = malloc(4 * 16 * sizeof(char));
strcpy((char *) copy, argv[1]);
char test = 't';
char *lastAddress = &test;
char *lastAddress = NULL;
int count = memreplace((char *) copy, *argv[2], *argv[3], &lastAddress);
printf("Suchzeichen wurde %i mal gefunden und ersetzt\n", count);
printf("zuletzt an Addresse 0x%p \n", (void *) lastAddress);
printf("\tSuchzeichen wurde %i mal gefunden und ersetzt\n", count);
printf("\tzuletzt an Addresse %p \n", (void *) lastAddress);
memdump(copy);
free(copy);