Add control characters

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 169 insertions, 0 deletions

diff --git a/libcharconv_control_characters.c b/libcharconv_control_characters.c
new file mode 100644
index 0000000..55e4bbf
--- /dev/null
+++ b/libcharconv_control_characters.c
@@ -0,0 +1,169 @@
+/* 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) {
+		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:
+	if (*n)
+		goto no_conv;
+	if (*ncp)
+		*cp = symbols[found].cp;
+	*n += found_len;
+	*ncp = 1u;
+	return indeterminate ? LIBCHARCONV_CONVERT_IF_END : LIBCHARCONV_CONVERTED;
+}