83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
// uhex (microhex) port for BlankOS; read-only version
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// Author: xamidev
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// Licensed under the Unlicense. See the repo below.
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// https://github.com/xamidev/blankos
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// This version is the port of a hex viewer which already was not great,
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// and now by being here it is even worse because it is RO and will have
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// hardcoded stuff in it (no ioctl, STDOUT, or other stuff here...)
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#define BYTES 1024
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#define round(x) (int)(x < 0 ? (x -0.5) : x + 0.5)
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#include "../libc/stdio.h"
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#include "../kernel/kmain.h"
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#include "../kernel/initrd.h"
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#include "../libc/string.h"
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#include "../kernel/kheap.h"
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int isprint(int c)
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{
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return (c >= 32 && c <= 126);
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}
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void print_hex(unsigned char* buf, int byteno, int pos, int BYTES_PER_LINE)
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{
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for (int i=0; i<byteno; i++)
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{
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if (i%BYTES_PER_LINE == 0)
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{
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if (i != 0)
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{
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printf(" ");
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for (int j=i-BYTES_PER_LINE; j<i; j++)
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{
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if (isprint(buf[j])) colorprintf(salmon, black, "%c", buf[j]);
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else printf(".");
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}
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}
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puts("\n");
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if (pos == 0) printf("%06d: ", i);
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else printf("%06d: ", pos);
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}
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printf("%2x ", buf[i]);
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}
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int padding = BYTES_PER_LINE - (byteno % BYTES_PER_LINE);
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if (padding < BYTES_PER_LINE)
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{
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for (int i=0; i<padding; i++) printf(" ");
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printf(" ");
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}
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int start = byteno-(byteno%BYTES_PER_LINE);
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for (int j=start; j<byteno; j++)
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{
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if (isprint(buf[j])) {
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colorprintf(salmon, black, "%c", buf[j]);
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} else {
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printf(".");
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}
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}
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puts("\n");
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}
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void program_uhex(int argc, char* argv[])
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{
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if (argc < 2)
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{
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puts("Usage: uhex <file>\n");
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return;
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}
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int BYTES_PER_LINE = 20;
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//unsigned char buf[BYTES]; // malloc with file_size next?
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uint32_t file_size = tar_get_file_size((uint8_t*)initrd_addr, argv[1]);
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unsigned char* buf = (unsigned char*)malloc(file_size);
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tar_file_to_buffer((uint8_t*)initrd_addr, argv[1], (char*)buf);
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print_hex(buf, file_size, 0, BYTES_PER_LINE);
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free(buf);
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}
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