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47 lines
1017 B
C
47 lines
1017 B
C
#include "fmt.h"
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#include "textcode.h"
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#include "str.h"
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#include "haveinline.h"
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unsigned long fmt_cescape(char* dest,const char* src,unsigned long len) {
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register const unsigned char* s=(const unsigned char*) src;
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unsigned long written=0,i;
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char c;
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for (i=0; i<len; ++i) {
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switch (s[i]) {
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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 '\e': 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[written]='\\';
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dest[written+1]=c;
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}
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written+=2;
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break;
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default:
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if (s[i]<' ') {
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if (dest) {
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dest[written]='\\';
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dest[written+1]='x';
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dest[written+2]=fmt_tohex(s[i]>>4);
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dest[written+3]=fmt_tohex(s[i]&0xf);
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}
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written+=4;
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} else {
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if (dest) dest[written]=s[i];
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++written;
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}
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break;
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}
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}
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return written;
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}
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