memory_pool/logging.c at master · limmh/memory_pool · GitHub

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#include "logging.h"
#include <ctype.h>

void logging_display_memory_contents(const void *start, const void *last, FILE *fp)
{
	size_t byte_count, group_count, i, n;
	const size_t bytes_per_row = 32;
	const unsigned char *p = (const unsigned char*) start;
	byte_count = (const unsigned char*) last - (const unsigned char*) start + 1;
	group_count = byte_count / bytes_per_row;

	for (i = 0; i < group_count; i++) {
		fprintf(fp, "%p:", p);
		for (n = 0; n < bytes_per_row; n++)
			fprintf(fp, " %02X", p[n]);

		fprintf(fp, "\t");
		for (n = 0; n < bytes_per_row; n++) {
			if (isalnum(p[n]) || ispunct(p[n]))
				fprintf(fp, "%c", p[n]);
			else if (isspace(p[n]))
				fprintf(fp, " ");
			else
				fprintf(fp, ".");
		}

		fprintf(fp, "\n");
		p += bytes_per_row;
	}

	n = byte_count % bytes_per_row;
	if (0 == n)
		return;

	fprintf(fp, "%p:", p);
	for (i = 0; i < bytes_per_row; i++) {
		if ((p + i) <= (unsigned char*) last)
			fprintf(fp, " %02X", p[i]);
		else
			fprintf(fp, "   ");
	}

	fprintf(fp, "\t");
	for (i = 0; i < n; i++) {
		if (isalnum(p[i]) || ispunct(p[i]))
			fprintf(fp, "%c", p[i]);
		else if (isspace(p[i]))
			fprintf(fp, " ");
		else
			fprintf(fp, ".");
	}

	fprintf(fp, "\n");
}