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Bug fixes, error checking; V1 complete

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xamidev
2024-06-02 13:32:25 +02:00
parent 8c0255d502
commit e39f1989cf
5 changed files with 29 additions and 21 deletions
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33
hex.c
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@@ -1,7 +1,6 @@
#include <stdio.h>
#include <ctype.h>
// TODO: Stop appending garbage at file end
// TODO: Skip repeating lines
#define BYTES 1024
@@ -13,7 +12,6 @@ void print_hex(unsigned char* buf, int byteno, int pos)
{
if (i % BYTES_PER_LINE == 0)
{
//printf("%03d: ", lineno);
if (i != 0)
{
printf(" ");
@@ -26,7 +24,7 @@ void print_hex(unsigned char* buf, int byteno, int pos)
puts("");
// Here, we could print positions in hex but I prefer using integers. printf("%04X ", i);
if (pos == 0) printf("\x1b[1;34m%06d:\x1b[0m ", i);
else printf("\x1b[34m%06d:\x1b[0m ", pos);
else printf("\x1b[1;34m%06d:\x1b[0m ", pos);
}
printf("%.2X ", buf[i]);
}
@@ -58,7 +56,12 @@ int main(int argc, char** argv)
return -1;
}
FILE* f = fopen(argv[1], "r");
FILE* f = fopen(argv[1], "rb+");
if (!f)
{
printf("Error opening file %s\n", argv[1]);
return -1;
}
unsigned char buf[BYTES];
int byteno = fread(buf, 1, BYTES, f);
print_hex(buf, byteno, 0);
@@ -69,31 +72,25 @@ int main(int argc, char** argv)
int loc;
scanf(" %c", &cmd);
if (cmd == 'p' || cmd == 'P' || cmd == 'e' || cmd == 'E') scanf("%d", &loc);
if (cmd == 'p' || cmd == 'e') scanf("%d", &loc);
switch(cmd)
{
case 'p':
case 'P':
case 'p':
print_hex(buf + loc, BYTES_PER_LINE, loc);
break;
case 'e':
case 'E':
scanf("%hhx", buf + loc);
int value;
scanf("%x", &value);
if (loc < byteno) buf[loc] = (unsigned char)value;
break;
case 's':
case 'S':
fclose(f);
f = fopen(argv[1], "w");
if (!f) {
perror("Error opening file for writing");
return -1;
}
fwrite(buf, 1, BYTES, f);
fseek(f, 0, SEEK_SET);
fwrite(buf, 1, byteno, f);
fclose(f);
return 0;
break;
case 'q':
case 'Q':
return 0;
}
}