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43 lines
861 B
C
43 lines
861 B
C
#include "fmt.h"
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#include "textcode.h"
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#include "scan.h"
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unsigned long scan_cescape(const char *src,char *dest,unsigned long *destlen) {
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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; s[i]; ++i) {
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if ((c=s[i])=='\\') {
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switch (s[i+1]) {
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case 'a': c='\a'; break;
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case 'b': c='\b'; break;
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case 'e': c='\e'; break;
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case 'f': c='\f'; break;
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case 'n': c='\n'; break;
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case 'r': c='\r'; break;
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case 't': c='\t'; break;
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case 'v': c='\v';
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case '\\': break;
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case 'x':
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{
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unsigned char a,b;
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a=scan_fromhex(s[i+2]);
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b=scan_fromhex(s[i+3]);
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if (a<16 && b<16) {
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c=(a<<4)+b;
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i+=2;
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}
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}
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break;
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default:
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--i;
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}
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++i;
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}
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dest[written]=c;
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++written;
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}
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*destlen=written;
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return i;
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}
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