mirror of
https://git.tartarus.org/simon/putty.git
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49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
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/*
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* Escaping/unescaping functions to translate between a saved session
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* name, and the key name used to represent it in the Registry area
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* where we store saved sessions.
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*
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* The basic technique is to %-escape characters we can't use in
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* Registry keys.
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*/
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#include "putty.h"
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void escape_registry_key(const char *in, strbuf *out)
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{
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bool candot = false;
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static const char hex[16] = "0123456789ABCDEF";
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while (*in) {
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if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' ||
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*in == '%' || *in < ' ' || *in > '~' || (*in == '.'
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&& !candot)) {
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put_byte(out, '%');
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put_byte(out, hex[((unsigned char) *in) >> 4]);
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put_byte(out, hex[((unsigned char) *in) & 15]);
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} else
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put_byte(out, *in);
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in++;
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candot = true;
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}
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}
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void unescape_registry_key(const char *in, strbuf *out)
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{
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while (*in) {
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if (*in == '%' && in[1] && in[2]) {
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int i, j;
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i = in[1] - '0';
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i -= (i > 9 ? 7 : 0);
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j = in[2] - '0';
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j -= (j > 9 ? 7 : 0);
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put_byte(out, (i << 4) + j);
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in += 3;
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} else {
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put_byte(out, *in++);
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}
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}
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}
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