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https://github.com/gbdev/rgbds.git
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72 lines
1.0 KiB
C++
72 lines
1.0 KiB
C++
/* SPDX-License-Identifier: MIT */
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#include <ctype.h>
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#include <stdint.h>
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#include "asm/main.hpp"
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#include "asm/util.hpp"
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#include "asm/warning.hpp"
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#include "extern/utf8decoder.hpp"
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char const *printChar(int c)
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{
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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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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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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", (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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size_t readUTF8Char(uint8_t *dest, char const *src)
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{
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uint32_t state = 0;
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uint32_t codep;
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size_t i = 0;
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for (;;) {
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if (decode(&state, &codep, src[i]) == 1)
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return 0;
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if (dest)
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dest[i] = src[i];
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i++;
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if (state == 0)
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return i;
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}
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}
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