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37 lines
762 B
C
37 lines
762 B
C
#include "fmt.h"
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static void fmt_oct3(char* dest,uint8_t w) {
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dest[2]=(char)((w&7)+'0'); w>>=3;
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dest[1]=(char)((w&7)+'0'); w>>=3;
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dest[0]=(char)((w&7)+'0');
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}
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size_t fmt_escapecharc(char* dest,uint32_t ch) {
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char c;
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if (ch>0xff) return 0;
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switch (ch) {
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case '\a': c='a'; goto doescape;
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case '\b': c='b'; goto doescape;
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case 0x1b: c='e'; goto doescape;
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case '\f': c='f'; goto doescape;
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case '\n': c='n'; goto doescape;
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case '\r': c='r'; goto doescape;
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case '\t': c='t'; goto doescape;
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case '\v': c='v'; goto doescape;
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case '\\':
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c='\\';
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doescape:
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if (dest) {
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dest[0]='\\';
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dest[1]=c;
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}
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return 2;
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default:
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if (dest) {
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dest[0]='\\';
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fmt_oct3(dest+1,ch&0xff);
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}
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return 4;
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}
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}
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