mirror of https://github.com/tp4a/teleport
40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
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// #include <unistd.h>
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#include "ts_utils.h"
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#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
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int ts_url_decode(const char *src, int src_len, char *dst, int dst_len, int is_form_url_encoded)
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{
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int i, j, a, b;
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for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++)
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{
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if (src[i] == '%')
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{
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if (i < src_len - 2 && isxdigit(*(const unsigned char *)(src + i + 1)) &&
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isxdigit(*(const unsigned char *)(src + i + 2))) {
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a = tolower(*(const unsigned char *)(src + i + 1));
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b = tolower(*(const unsigned char *)(src + i + 2));
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dst[j] = (char)((HEXTOI(a) << 4) | HEXTOI(b));
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i += 2;
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}
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else
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{
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return -1;
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}
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}
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else if (is_form_url_encoded && src[i] == '+')
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{
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dst[j] = ' ';
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}
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else
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{
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dst[j] = src[i];
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}
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}
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dst[j] = '\0'; /* Null-terminate the destination */
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return i >= src_len ? j : -1;
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}
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