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// -*- mode: c++; c-basic-offset: 2; -*-
#include "common.hh"
#include <string.h>
#include "gui_attrtext.hh"
#include "gui_hexdump.hh"
namespace {
AttributedText::Attribute const addr(0x90, 0x90, 0x90);
inline size_t append(char* out, size_t max, char const* in, size_t len) {
if (len <= max) {
memcpy(out, in, len);
return len;
}
return 0;
}
inline size_t safe(char* out, size_t max, char const* in, size_t len) {
size_t ret = 0;
for (; len--; ++in) {
if (*in >= ' ' && *in < '\x7f') {
ret += append(out + ret, max - ret, in, 1);
continue;
}
switch (*in) {
case '\r':
ret += append(out + ret, max - ret, "\xe2\x86\xb5", 3); // U+21B5
break;
case '\n':
ret += append(out + ret, max - ret, "\xc2\xb6", 2); // U+00B6
break;
case '\x8':
ret += append(out + ret, max - ret, "\xe2\x8c\xab", 3); // U+232B
break;
case '\t':
ret += append(out + ret, max - ret, "\xe2\x86\xb9", 3); // U+21B9
break;
default:
ret += append(out + ret, max - ret, "\xef\xbf\xbd", 3); // U+FFFD
break;
}
}
return ret;
}
} // namespace
// static
void HexDump::write(AttributedText* text, uint8_t flags, std::string const& str,
size_t start, size_t length) {
if (start >= str.size()) return;
length = std::min(length, str.size() - start);
if (length == 0) return;
AttributedText::Attribute box(0x90, 0x90, 0x90);
box.set_bold(true);
size_t i = 0;
auto data = str.data() + start;
char tmp[80];
char tmp2[64];
int len;
while (i + 16 <= length) {
if (flags & ADDRESS) {
len = snprintf(tmp, sizeof(tmp), "%08lx ", static_cast<unsigned long>(i));
text->append(tmp, len, addr);
}
auto x = tmp2;
for (char c = 0; c < 2; ++c) {
len = snprintf(tmp, sizeof(tmp), "%02x %02x %02x %02x %02x %02x %02x %02x",
data[i], data[i + 1], data[i + 2], data[i + 3], data[i + 4], data[i + 5], data[i + 6],
data[i + 7]);
if (flags & CHARS) {
x += safe(x, sizeof(tmp2) - (x - tmp2), data + i, 8);
}
i += 8;
text->append(tmp, len);
if (c == 0) text->append(" ", 2);
}
if (flags & CHARS) {
text->append(" |", 3, box);
text->append(tmp2, x - tmp2);
text->append("|\n", 2, box);
} else {
text->append("\n", 1);
}
}
if (i < length) {
if (flags & ADDRESS) {
len = snprintf(tmp, sizeof(tmp), "%08lx ", static_cast<unsigned long>(i));
text->append(tmp, len, addr);
}
auto x = tmp2;
if (i + 8 <= length) {
len = snprintf(tmp, sizeof(tmp), "%02x %02x %02x %02x %02x %02x %02x %02x",
data[i], data[i + 1], data[i + 2], data[i + 3], data[i + 4], data[i + 5], data[i + 6],
data[i + 7]);
if (flags & CHARS) {
x += safe(x, sizeof(tmp2) - (x - tmp2), data + i, 8);
}
i += 8;
text->append(tmp, len);
text->append(" ");
}
for (; i < length; ++i) {
len = snprintf(tmp, sizeof(tmp), "%02x ", data[i]);
if (flags & CHARS) x += safe(x, sizeof(tmp2) - (x - tmp2), data + i, 1);
text->append(tmp, len);
}
if (flags & CHARS) {
auto extra = 16 - length % 16;
extra = extra * 3 + (extra > 8 ? 1 : 0);
memset(tmp, ' ', extra);
text->append(tmp, extra);
text->append(" |", 2, box);
text->append(tmp2, x - tmp2);
text->append("|\n", 2, box);
} else {
text->append("\n", 1);
}
if (flags & ADDRESS) {
len = snprintf(tmp, sizeof(tmp), "%08lx\n", static_cast<unsigned long>(length));
text->append(tmp, len, addr);
}
}
}
// static
uint8_t const HexDump::ADDRESS = 1 << 0;
// static
uint8_t const HexDump::CHARS = 1 << 1;
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