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51 lines
1.1 KiB
C
51 lines
1.1 KiB
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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size_t fmt_cescape2(char* dest,const char* src,size_t len,const char* escapeme) {
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register const unsigned char* s=(const unsigned char*) src;
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size_t 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 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[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]<' ' || escapeme[str_chr(escapeme,s[i])]==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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size_t fmt_cescape(char* dest,const char* src,size_t len) {
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return fmt_cescape2(dest,src,len,"");
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}
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