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53 lines
783 B
C++
53 lines
783 B
C++
// SPDX-License-Identifier: MIT
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#include "util.hpp"
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#include <ctype.h>
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#include <stdint.h>
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#include <stdio.h>
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char const *printChar(int c) {
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// "'A'" + '\0': 4 bytes
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// "'\\n'" + '\0': 5 bytes
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// "0xFF" + '\0': 5 bytes
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static char buf[5];
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if (c == EOF) {
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return "EOF";
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}
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if (isprint(c)) {
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buf[0] = '\'';
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buf[1] = c;
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buf[2] = '\'';
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buf[3] = '\0';
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return buf;
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}
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switch (c) {
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case '\n':
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buf[2] = 'n';
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break;
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case '\r':
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buf[2] = 'r';
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break;
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case '\t':
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buf[2] = 't';
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break;
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case '\0':
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buf[2] = '0';
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break;
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default: // Print as hex
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buf[0] = '0';
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buf[1] = 'x';
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snprintf(&buf[2], 3, "%02hhX", static_cast<uint8_t>(c)); // includes the '\0'
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return buf;
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}
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buf[0] = '\'';
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buf[1] = '\\';
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buf[3] = '\'';
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buf[4] = '\0';
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return buf;
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}
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