37 lines
693 B
C
37 lines
693 B
C
#include "capwap.h"
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int cw_is_utf8(unsigned char *str, size_t len)
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{
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size_t i = 0;
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size_t j = 0;
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size_t bytes = 0;
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while (i < len) {
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j = i;
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if (str[i] < 0x20) {
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return 0;
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}
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if (str[i] <= 0x7F)
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bytes = 0;
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else if (str[i] >= 0xC0 /*11000000 */ && str[i] <= 0xDF /*11011111 */ )
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bytes = 1;
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else if (str[i] >= 0xE0 /*11100000 */ && str[i] <= 0xEF /*11101111 */ )
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bytes = 2;
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else if (str[i] >= 0xF0 /*11110000 */
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&& str[i] <= 0xF4 /* Cause of RFC 3629 */ )
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bytes = 3;
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else {
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return 0;
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}
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i += 1;
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while (i < len && bytes > 0 && str[i] >= 0x80 && str[i] <= 0xBF) {
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i += 1;
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bytes -= 1;
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}
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if (bytes != 0) {
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return 0;
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}
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}
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return 1;
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}
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