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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"
#include <string.h>
static const char *texts[] = {
"NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL",
"BS", "HT", "LF", " VT", "FF", "CR", "SS", "SI",
"DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB",
"CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US",
"SP", "DEL"
};
enum libcharconv_result
libcharconv_control_character_representations(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
size_t i, len, found, found_len;
int indeterminate;
*n = 0;
for (; slen; s++, slen--, ++*n) {
if (*(const unsigned char *)s <= ' ') {
found = *(const unsigned char *)s;
goto conv_byte;
} else if (*(const unsigned char *)s == 0x7Fu) {
found = 0x21u;
goto conv_byte;
}
indeterminate = 0;
found = SIZE_MAX;
found_len = 0u;
for (i = 0u; i < sizeof(texts) / sizeof(*texts); i++) {
len = strlen(texts[i]);
if (strncmp(s, texts[i], len < slen ? len : slen))
continue;
if (slen < len) {
indeterminate = 1;
continue;
}
if (len > found_len) {
found = i;
found_len = len;
}
}
if (found_len)
goto conv;
if (*n)
goto no_conv;
if (indeterminate)
return LIBCHARCONV_INDETERMINATE;
}
no_conv:
return LIBCHARCONV_NO_CONVERT;
conv_byte:
found_len = 1u;
conv:
if (*n)
goto no_conv;
if (*ncp)
*cp = (uint_least32_t)UINT32_C(0x2400) | (uint_least32_t)found;
*n += found_len;
*ncp = 1u;
return indeterminate ? LIBCHARCONV_CONVERT_IF_END : LIBCHARCONV_CONVERTED;
}
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