66 lines
1.4 KiB
Plaintext
66 lines
1.4 KiB
Plaintext
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#include <stdint.h>
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#include <stdbool.h>
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#include <rom.h>
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static char space[]=" ";
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static char blank[]=".. ";
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static char brk[] = " | ";
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static char addrfmt[]="\n%08x: ";
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static char fmt[]="%02x ";
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static char eol[]="\n";
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static char onechar[]="%c";
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void hexdump (char *src, uint32_t len, uint32_t base_addr)
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{
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bool nl = true;
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char *p = (char *)base_addr;
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while (len)
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{
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uint32_t line_addr = (unsigned)p & ~0xf;
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union {
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uint32_t dw[4];
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char b[16];
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} cache;
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for (int i = 0; i < 4; ++i)
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cache.dw[i] = ((uint32_t*)(p + (uint32_t)src - base_addr))[i];
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if (nl)
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{
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ets_printf(addrfmt, line_addr);
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nl = false;
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}
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uint32_t skips = ((unsigned)p > line_addr) ? ((unsigned)p - line_addr) : 0;
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uint32_t skipe = (len < 16) ? 16-len : 16;
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for (int i = 0; i < 16; ++i)
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{
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if (i < skips || i >= skipe)
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ets_printf(blank);
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else
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{
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ets_printf(fmt, cache.b[i]);
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++p;
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--len;
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}
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if (i == 7)
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ets_printf(space);
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}
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ets_printf (brk);
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for (int i = 0; i < 16; ++i)
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{
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char c = ' ';
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if (i >= skips && i < skipe)
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{
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if (cache.b[i] >= 0x20 && cache.b[i] < 0x80)
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c = cache.b[i];
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else
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c = '.';
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}
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ets_printf(onechar, c);
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if (i == 7)
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ets_printf(space);
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}
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nl = true;
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}
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ets_printf(eol);
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}
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