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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"
#include <string.h>
static struct {
uint_least32_t cp;
const char *s;
} symbols[] = {
{UINT32_C(0x00), "NUL"}, /* NULL */
{UINT32_C(0x01), "SOH"}, /* START OF HEADING */
{UINT32_C(0x02), "STX"}, /* START OF TEXT */
{UINT32_C(0x03), "ETX"}, /* END OF TEXT */
{UINT32_C(0x04), "EOT"}, /* END OF TRANSMISSION */
{UINT32_C(0x05), "ENQ"}, /* ENQUIRY */
{UINT32_C(0x06), "ACK"}, /* ACKNOWLEDGE */
{UINT32_C(0x07), "BEL"}, /* BELL */
{UINT32_C(0x08), "BS"}, /* BACKSPACE */
{UINT32_C(0x09), "HT"}, /* CHARACTER TABULATION */
{UINT32_C(0x0A), "LF"}, /* LINE FEED */
{UINT32_C(0x0B), "VT"}, /* LINE TABULATION */
{UINT32_C(0x0C), "FF"}, /* FORM FEED */
{UINT32_C(0x0D), "CR"}, /* CARRIAGE RETURN */
{UINT32_C(0x0E), "SS"}, /* SHIFT OUT */
{UINT32_C(0x0F), "SI"}, /* SHIFT IN */
{UINT32_C(0x10), "DLE"}, /* DATA LINK ESCAPE */
{UINT32_C(0x11), "DC1"}, /* DEVICE CONTROL ONE */
{UINT32_C(0x12), "DC2"}, /* DEVICE CONTROL TWO */
{UINT32_C(0x13), "DC3"}, /* DEVICE CONTROL THREE */
{UINT32_C(0x14), "DC4"}, /* DEVICE CONTROL FOUR */
{UINT32_C(0x15), "NAK"}, /* NEGATIVE ACKNOWLEDGE */
{UINT32_C(0x16), "SYN"}, /* SYNCHRONOUS IDLE */
{UINT32_C(0x17), "ETB"}, /* END OF TRANSMISSION BLOCK */
{UINT32_C(0x18), "CAN"}, /* CANCEL */
{UINT32_C(0x19), "EM"}, /* END OF MEDIUM */
{UINT32_C(0x1A), "SUB"}, /* SUBSTITUTE */
{UINT32_C(0x1B), "ESC"}, /* ESCAPE */
{UINT32_C(0x1C), "FS"}, /* INFORMATION SEPARATOR FOUR */
{UINT32_C(0x1D), "GS"}, /* INFORMATION SEPARATOR THREE */
{UINT32_C(0x1E), "RS"}, /* INFORMATION SEPARATOR TWO */
{UINT32_C(0x1F), "US"}, /* INFORMATION SEPARATOR ONE */
{UINT32_C(0x7F), "DEL"}, /* DELETE */
{UINT32_C(0x0080), "PAD"}, /* Padding Character */
{UINT32_C(0x0081), "HOP"}, /* High Octet Preset */
{UINT32_C(0x0082), "BPH"}, /* BREAK PERMITTED HERE */
{UINT32_C(0x0083), "NBP"}, /* NO BREAK HERE */
{UINT32_C(0x0084), "IND"}, /* INDEX */
{UINT32_C(0x0085), "NEL"}, /* NEXT LINE */
{UINT32_C(0x0086), "SSA"}, /* START OF SELECTED AREA */
{UINT32_C(0x0087), "ESA"}, /* END OF SELECTED AREA */
{UINT32_C(0x0088), "HTS"}, /* CHARACTER TABULATION SET */
{UINT32_C(0x0089), "HTJ"}, /* CHARACTER TABULATION WITH JUSTIFICATION */
{UINT32_C(0x008A), "LTS"}, /* LINE TABULATION SET */
{UINT32_C(0x008B), "PLD"}, /* PARTIAL LINE FORWARD */
{UINT32_C(0x008C), "PLU"}, /* PARTIAL LINE BACKWARD */
{UINT32_C(0x008D), "RI"}, /* REVERSE LINE FEED */
{UINT32_C(0x008E), "SS2"}, /* SINGLE SHIFT TWO */
{UINT32_C(0x008F), "SS3"}, /* SINGLE SHIFT THREE */
{UINT32_C(0x0090), "DCS"}, /* DEVICE CONTROL STRING */
{UINT32_C(0x0091), "PU1"}, /* PRIVATE USE ONE */
{UINT32_C(0x0092), "PU2"}, /* PRIVATE USE TWO */
{UINT32_C(0x0093), "STS"}, /* SET TRANSMIT STATE */
{UINT32_C(0x0094), "CCH"}, /* CANCEL CHARACTER */
{UINT32_C(0x0095), "MW"}, /* MESSAGE WAITING */
{UINT32_C(0x0096), "SPA"}, /* START OF GUARDED AREA */
{UINT32_C(0x0097), "EPA"}, /* END OF GUARDED AREA */
{UINT32_C(0x0098), "SOS"}, /* START OF STRING */
{UINT32_C(0x0099), "SGCI"}, /* Single Graphic Character Introducer */
{UINT32_C(0x009A), "SSI"}, /* SINGLE CHARACTER INTRODUCER */
{UINT32_C(0x009B), "CSI"}, /* CONTROL SEQUENCE INTRODUCER */
{UINT32_C(0x009C), "ST"}, /* STRING TERMINATOR */
{UINT32_C(0x009D), "OSC"}, /* OPERATING SYSTEM COMMAND */
{UINT32_C(0x009E), "PM"}, /* PRIVACY MESSAGE */
{UINT32_C(0x009F), "APC"}, /* APPLICATION PROGRAM COMMAND */
{UINT32_C(0x200B), "ZWS"}, /* ZERO WIDTH SPACE */
{UINT32_C(0x200C), "ZWNJ"}, /* ZERO WIDTH NON-JOINER */
{UINT32_C(0x200D), "ZWJ"}, /* ZERO WIDTH JOINER */
{UINT32_C(0x200E), "LTRM"}, /* LEFT-TO-RIGHT MARK */
{UINT32_C(0x200F), "RTLM"}, /* RIGHT-TO-LEFT MARK */
{UINT32_C(0x202A), "LTRE"}, /* LEFT-TO-RIGHT EMBEDDING */
{UINT32_C(0x202B), "RTLE"}, /* RIGHT-TO-LEFT EMBEDDING */
{UINT32_C(0x202C), "PDF"}, /* POP DIRECTIONAL FORMATTING */
{UINT32_C(0x202D), "LTRO"}, /* LEFT-TO-RIGHT OVERRIDE */
{UINT32_C(0x202E), "RTLO"}, /* RIGHT-TO-LEFT OVERRIDE */
{UINT32_C(0x2060), "WJ"}, /* WORD JOINER */
{UINT32_C(0x2066), "LTRI"}, /* LEFT-TO-RIGHT ISOLATE */
{UINT32_C(0x2067), "RTLI"}, /* RIGHT-TO-LEFT ISOLATE */
{UINT32_C(0x2068), "FSI"}, /* FIRST STRONG ISOLATE */
{UINT32_C(0x2069), "PDI"}, /* POP DIRECTIONAL ISOLATE */
{UINT32_C(0x206A), "ISS"}, /* INHIBIT SYMMETRIC SWAPPING */
{UINT32_C(0x206B), "ASS"}, /* ACTIVATE SYMMETRIC SWAPPING */
{UINT32_C(0x206C), "IAFS"}, /* INHIBIT ARABIC FORM SHAPING */
{UINT32_C(0x206D), "AAFS"}, /* ACTIVATE ARABIC FORM SHAPING */
{UINT32_C(0x206E), "NADS"}, /* NATIONAL DIGIT SHAPES */
{UINT32_C(0x206F), "NODS"}, /* NOMINAL DIGIT SHAPES */
{UINT32_C(0xFFF9), "IAA"}, /* INTERLINEAR ANNOTATION ANCHOR */
{UINT32_C(0xFFFA), "IAS"}, /* INTERLINEAR ANNOTATION SEPARATOR */
{UINT32_C(0xFFFB), "IAT"}, /* INTERLINEAR ANNOTATION TERMINATOR */
{UINT32_C(0x1BCA0), "SFLO"}, /* SHORTHAND FORMAT LETTER OVERLAP */
{UINT32_C(0x1BCA1), "SFCO"}, /* SHORTHAND FORMAT CONTINUING OVERLAP */
{UINT32_C(0x1BCA2), "SFDS"}, /* SHORTHAND FORMAT DOWN STEP */
{UINT32_C(0x1BCA3), "SFUS"}, /* SHORTHAND FORMAT UP STEP */
{UINT32_C(0xE0001), "LTAG"}, /* LANGUAGE TAG */
{UINT32_C(0xE007F), "CTAG"}, /* CANCEL TAG */
{UINT32_C(0x20), "SP"}, /* SPACE */
{UINT32_C(0x00A0), "NBSP"}, /* NO-BREAK SPACE */
{UINT32_C(0x2000), "NQ"}, /* EN QUAD */
{UINT32_C(0x2001), "MQ"}, /* EM QUAD */
{UINT32_C(0x2002), "NSP"}, /* EN SPACE */
{UINT32_C(0x2003), "MSP"}, /* EM SPACE */
{UINT32_C(0x2004), "3MSP"}, /* THREE-PER-EM SPACE */
{UINT32_C(0x2005), "4MSP"}, /* FOUR-PER-EM SPACE */
{UINT32_C(0x2006), "6MSP"}, /* SIX-PER-EM SPACE */
{UINT32_C(0x2007), "FSP"}, /* FIGURE SPACE */
{UINT32_C(0x2008), "PSP"}, /* PUNCTUATION SPACE */
{UINT32_C(0x2009), "TSP"}, /* THIN SPACE */
{UINT32_C(0x200A), "HSP"}, /* HAIR SPACE */
{UINT32_C(0x2028), "LS"}, /* LINE SEPARATOR */
{UINT32_C(0x2029), "PS"}, /* PARAGRAPH SEPARATOR */
{UINT32_C(0x202F), "NNBSP"}, /* NARROW NO-BREAK SPACE */
{UINT32_C(0x205F), "MMSP"}, /* MEDIUM MATHEMATICAL SPACE */
{UINT32_C(0x00AD), "SHY"} /* SOFT HYPHEN */
};
enum libcharconv_result
libcharconv_control_characters(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 (s[0] == '\xE2') {
if (slen == 1u)
return LIBCHARCONV_INDETERMINATE;
if (s[1] != '\x90')
goto search;
if (slen == 2u)
return LIBCHARCONV_INDETERMINATE;
i = ((const unsigned char *)s)[2];
if (0x80u > i || i > 0xA1u)
goto search;
i &= 0x3Fu;
i = i == 0x21u ? 0x7Fu : i;
goto conv_repr;
}
search:
indeterminate = 0;
found = SIZE_MAX;
found_len = 0u;
for (i = 0u; i < sizeof(symbols) / sizeof(*symbols); i++) {
len = strlen(symbols[i].s);
if (strncmp(s, symbols[i].s, 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_repr:
if (*n)
goto no_conv;
if (*ncp)
*cp = (uint_least32_t)i;
*n += 3u;
*ncp = 1u;
return LIBCHARCONV_CONVERTED;
conv:
if (*n)
goto no_conv;
if (*ncp)
*cp = symbols[found].cp;
*n += found_len;
*ncp = 1u;
return indeterminate ? LIBCHARCONV_CONVERT_IF_END : LIBCHARCONV_CONVERTED;
}
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