Use C-style comments to support using a C89 compiler.

CHANGELOG.md

 *  Add `iswblank` and `iswxdigit` compatibility.
 *  Improve ctype compatibility.
 *  PropList and emoji-data property lookup.
+*  Support building with a C89 compiler.
 
 ## 9.0.0 - 2016-12-28
 

src/case.c

  * along with ucd-tools.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-// NOTE: This file is automatically generated from the UnicodeData.txt file in
-// the Unicode Character database by the ucd-tools/tools/categories.py script.
+/* NOTE: This file is automatically generated from the UnicodeData.txt file in
+ * the Unicode Character database by the ucd-tools/tools/categories.py script.
+ */
 
 #include "ucd/ucd.h"
 
 #include <stddef.h>
 
-// Unicode Character Data 9.0.0
+/* Unicode Character Data 9.0.0 */
 
 struct case_conversion_entry
 {

src/ctype.c

 	switch (ucd_lookup_category(c))
 	{
 	case UCD_CATEGORY_Zs:
-		switch (c) // Exclude characters with the <noBreak> DispositionType
+		switch (c) /* Exclude characters with the <noBreak> DispositionType */
 		{
-		case 0x00A0: // U+00A0 : NO-BREAK SPACE
-		case 0x2007: // U+2007 : FIGURE SPACE
-		case 0x202F: // U+202F : NARROW NO-BREAK SPACE
+		case 0x00A0: /* U+00A0 : NO-BREAK SPACE */
+		case 0x2007: /* U+2007 : FIGURE SPACE */
+		case 0x202F: /* U+202F : NARROW NO-BREAK SPACE */
 			return 0;
 		}
 		return 1;
 	case UCD_CATEGORY_Cc:
-		return c == 0x09; // U+0009 : CHARACTER TABULATION
+		return c == 0x09; /* U+0009 : CHARACTER TABULATION */
 	default:
 		return 0;
 	}
 
 int ucd_isdigit(codepoint_t c)
 {
-	return (c >= 0x30 && c <= 0x39); // [0-9]
+	return (c >= 0x30 && c <= 0x39); /* [0-9] */
 }
 
 int ucd_isgraph(codepoint_t c)
 	case UCD_CATEGORY_Zp:
 		return 1;
 	case UCD_CATEGORY_Zs:
-		switch (c) // Exclude characters with the <noBreak> DispositionType
+		switch (c) /* Exclude characters with the <noBreak> DispositionType */
 		{
-		case 0x00A0: // U+00A0 : NO-BREAK SPACE
-		case 0x2007: // U+2007 : FIGURE SPACE
-		case 0x202F: // U+202F : NARROW NO-BREAK SPACE
+		case 0x00A0: /* U+00A0 : NO-BREAK SPACE */
+		case 0x2007: /* U+2007 : FIGURE SPACE */
+		case 0x202F: /* U+202F : NARROW NO-BREAK SPACE */
 			return 0;
 		}
 		return 1;
 	case UCD_CATEGORY_Cc:
-		switch (c) // Include control characters marked as White_Space
+		switch (c) /* Include control characters marked as White_Space */
 		{
-		case 0x09: // U+0009 : CHARACTER TABULATION
-		case 0x0A: // U+000A : LINE FEED
-		case 0x0B: // U+000B : LINE TABULATION
-		case 0x0C: // U+000C : FORM FEED
-		case 0x0D: // U+000D : CARRIAGE RETURN
-		case 0x85: // U+0085 : NEXT LINE
+		case 0x09: /* U+0009 : CHARACTER TABULATION */
+		case 0x0A: /* U+000A : LINE FEED */
+		case 0x0B: /* U+000B : LINE TABULATION */
+		case 0x0C: /* U+000C : FORM FEED */
+		case 0x0D: /* U+000D : CARRIAGE RETURN */
+		case 0x85: /* U+0085 : NEXT LINE */
 			return 1;
 		}
 	default:
 
 int ucd_isxdigit(codepoint_t c)
 {
-	return (c >= 0x30 && c <= 0x39)  // [0-9]
-	    || (c >= 0x41 && c <= 0x46)  // [A-Z]
-	    || (c >= 0x61 && c <= 0x66); // [a-z]
+	return (c >= 0x30 && c <= 0x39)  /* [0-9] */
+	    || (c >= 0x41 && c <= 0x46)  /* [A-Z] */
+	    || (c >= 0x61 && c <= 0x66); /* [a-z] */
 }

src/proplist.c

 		if (c == 0x029D)                return UCD_PROPERTY_SOFT_DOTTED;
 		break;
 	case 0x0300:
-		if (c >= 0x03D0 && c <= 0x03D2) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x03D0 && c <= 0x03D2) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c == 0x03D5)                return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x03F0 && c <= 0x03F1) return UCD_PROPERTY_OTHER_MATH;
 		if (c == 0x03F3)                return UCD_PROPERTY_SOFT_DOTTED;
-		if (c >= 0x03F4 && c <= 0x03F5) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x03F4 && c <= 0x03F5) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x0400:
 		if (c == 0x0456)                return UCD_PROPERTY_SOFT_DOTTED;
 		if (c == 0x1ECB)                return UCD_PROPERTY_SOFT_DOTTED;
 		break;
 	case 0x2100:
-		if (c >= 0x210A && c <= 0x2113) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x212F && c <= 0x2131) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x2133 && c <= 0x2134) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x210A && c <= 0x2113) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x212F && c <= 0x2131) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x2133 && c <= 0x2134) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c == 0x2139)                return UCD_PROPERTY_EMOJI;
-		if (c >= 0x213C && c <= 0x213F) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x2145 && c <= 0x2147) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x213C && c <= 0x213F) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x2145 && c <= 0x2147) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x2148 && c <= 0x2149) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		break;
 	case 0xFF00:
 		break;
 	case 0x01D400:
 		if (c >= 0x01D422 && c <= 0x01D423) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
-		if (c >= 0x01D400 && c <= 0x01D454) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D400 && c <= 0x01D454) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D456 && c <= 0x01D457) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D48A && c <= 0x01D48B) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
-		if (c >= 0x01D458 && c <= 0x01D49C) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x01D4AE && c <= 0x01D4B9) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D458 && c <= 0x01D49C) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x01D4AE && c <= 0x01D4B9) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c == 0x01D4BB)                  return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D4BE && c <= 0x01D4BF) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D4BD && c <= 0x01D4C3) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D4F2 && c <= 0x01D4F3) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
-		if (c >= 0x01D4C5)                  return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D4C5)                  return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x01D500:
-		if                  (c <= 0x01D505) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if                  (c <= 0x01D505) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D526 && c <= 0x01D527) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
-		if (c >= 0x01D51E && c <= 0x01D539) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D51E && c <= 0x01D539) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D55A && c <= 0x01D55B) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D58E && c <= 0x01D58F) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D5C2 && c <= 0x01D5C3) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D5F6 && c <= 0x01D5F7) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
-		if (c >= 0x01D552)                  return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D552)                  return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x01D600:
 		if (c >= 0x01D62A && c <= 0x01D62B) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D65E && c <= 0x01D65F) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
 		if (c >= 0x01D692 && c <= 0x01D693) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_SOFT_DOTTED;
-		if                  (c <= 0x01D6A5) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if                  (c <= 0x01D6A5) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D6C2 && c <= 0x01D6DA) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D6DC && c <= 0x01D6FA) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D6DC && c <= 0x01D6FA) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D6FC)                  return UCD_PROPERTY_OTHER_MATH;
 		break;
 	case 0x01D700:
 		if                  (c <= 0x01D714) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D716 && c <= 0x01D734) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D716 && c <= 0x01D734) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D736 && c <= 0x01D74E) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D750 && c <= 0x01D76E) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D750 && c <= 0x01D76E) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D770 && c <= 0x01D788) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D78A && c <= 0x01D7A8) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D78A && c <= 0x01D7A8) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D7AA && c <= 0x01D7C2) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D7C4 && c <= 0x01D7CB) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D7C4 && c <= 0x01D7CB) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	}
 	return 0;
 		if (c >= 0x0041 && c <= 0x0046) return UCD_PROPERTY_HEX_DIGIT | UCD_PROPERTY_ASCII_HEX_DIGIT;
 		break;
 	case 0x0300:
-		if (c >= 0x03D0 && c <= 0x03D2) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x03F4 && c <= 0x03F5) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x03D0 && c <= 0x03D2) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x03F4 && c <= 0x03F5) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0xFF00:
 		if (c >= 0xFF21 && c <= 0xFF26) return UCD_PROPERTY_HEX_DIGIT;
 	case 0x2100:
 		if (c == 0x2102)                return UCD_PROPERTY_OTHER_MATH;
 		if (c == 0x2107)                return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x210A && c <= 0x2113) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x210A && c <= 0x2113) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c == 0x2115)                return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x2119 && c <= 0x211D) return UCD_PROPERTY_OTHER_MATH;
 		if (c == 0x2124)                return UCD_PROPERTY_OTHER_MATH;
 		if (c == 0x2128)                return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x212C && c <= 0x212D) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x212F && c <= 0x2131) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x2133 && c <= 0x2134) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x213C && c <= 0x213F) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x2145 && c <= 0x2149) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x212F && c <= 0x2131) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x2133 && c <= 0x2134) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x213C && c <= 0x213F) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x2145 && c <= 0x2149) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x01D400:
-		if (c >= 0x01D400 && c <= 0x01D454) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x01D456 && c <= 0x01D49C) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D400 && c <= 0x01D454) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x01D456 && c <= 0x01D49C) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D49E && c <= 0x01D49F) return UCD_PROPERTY_OTHER_MATH;
 		if (c == 0x01D4A2)                  return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D4A5 && c <= 0x01D4A6) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D4A9 && c <= 0x01D4AC) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D4AE && c <= 0x01D4B9) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x01D4C5)                  return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D4AE && c <= 0x01D4B9) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x01D4C5)                  return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x01D500:
-		if                  (c <= 0x01D505) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if                  (c <= 0x01D505) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D507 && c <= 0x01D50A) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D50D && c <= 0x01D514) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D516 && c <= 0x01D51C) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D51E && c <= 0x01D539) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D51E && c <= 0x01D539) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D53B && c <= 0x01D53E) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D540 && c <= 0x01D544) return UCD_PROPERTY_OTHER_MATH;
 		if (c == 0x01D546)                  return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x01D54A && c <= 0x01D550) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D552)                  return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D552)                  return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x01D600:
-		if                  (c <= 0x01D6A5) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if                  (c <= 0x01D6A5) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		if (c >= 0x01D6A8 && c <= 0x01D6C0) return UCD_PROPERTY_OTHER_MATH;
-		if (c >= 0x01D6DC && c <= 0x01D6FA) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D6DC && c <= 0x01D6FA) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	case 0x01D700:
-		if (c >= 0x01D716 && c <= 0x01D734) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x01D750 && c <= 0x01D76E) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x01D78A && c <= 0x01D7A8) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
-		if (c >= 0x01D7C4 && c <= 0x01D7CB) return UCD_PROPERTY_OTHER_MATH; // Ll|Lu
+		if (c >= 0x01D716 && c <= 0x01D734) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x01D750 && c <= 0x01D76E) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x01D78A && c <= 0x01D7A8) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
+		if (c >= 0x01D7C4 && c <= 0x01D7CB) return UCD_PROPERTY_OTHER_MATH; /* Ll|Lu */
 		break;
 	}
 	return 0;
 		break;
 	case 0x2700:
 		if (c == 0x27C6)                return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX;
-		if (c >= 0x27E6 && c <= 0x27EF) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX; // Pe|Ps
+		if (c >= 0x27E6 && c <= 0x27EF) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX; /* Pe|Ps */
 		return UCD_PROPERTY_PATTERN_SYNTAX;
 	case 0x2900:
-		return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX; // Pe|Ps
+		return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX; /* Pe|Ps */
 	case 0x2E00:
 		return UCD_PROPERTY_PATTERN_SYNTAX;
 	case 0x3000:
 		break;
 	case 0x2700:
 		if (c == 0x27C5)                return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX;
-		if (c >= 0x27E6 && c <= 0x27EF) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX; // Pe|Ps
+		if (c >= 0x27E6 && c <= 0x27EF) return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX; /* Pe|Ps */
 		return UCD_PROPERTY_PATTERN_SYNTAX;
 	case 0x2900:
 		return UCD_PROPERTY_OTHER_MATH | UCD_PROPERTY_PATTERN_SYNTAX;
 	case UCD_CATEGORY_Zl: return UCD_PROPERTY_WHITE_SPACE | UCD_PROPERTY_PATTERN_WHITE_SPACE;
 	case UCD_CATEGORY_Zp: return UCD_PROPERTY_WHITE_SPACE | UCD_PROPERTY_PATTERN_WHITE_SPACE;
 	case UCD_CATEGORY_Zs: return properties_Zs(c);
-	default:              return 0; // Co Cs Ii Lt Me
+	default:              return 0; /* Co Cs Ii Lt Me */
 	};
 }

tests/printcdata.c

 {
 	switch (mode)
 	{
-	case 'c': // character
+	case 'c': /* character */
 		switch (c)
 		{
 		case '\t': fputs("\\t", out);  break;
 		default:   fput_utf8c(out, c); break;
 		}
 		break;
-	case 'h': // hexadecimal (lower)
+	case 'h': /* hexadecimal (lower) */
 		fprintf(out, "%06x", c);
 		break;
-	case 'H': // hexadecimal (upper)
+	case 'H': /* hexadecimal (upper) */
 		fprintf(out, "%06X", c);
 		break;
 	}
 {
 	switch (mode)
 	{
-	case 'A': // alpha-numeric
+	case 'A': /* alpha-numeric */
 		fputc(iswalnum(c) ? '1' : '0', out);
 		break;
-	case 'a': // alpha
+	case 'a': /* alpha */
 		fputc(iswalpha(c) ? '1' : '0', out);
 		break;
-	case 'b': // blank
+	case 'b': /* blank */
 		fputc(iswblank(c) ? '1' : '0', out);
 		break;
-	case 'c': // control
+	case 'c': /* control */
 		fputc(iswcntrl(c) ? '1' : '0', out);
 		break;
-	case 'd': // numeric
+	case 'd': /* numeric */
 		fputc(iswdigit(c) ? '1' : '0', out);
 		break;
-	case 'g': // glyph
+	case 'g': /* glyph */
 		fputc(iswgraph(c) ? '1' : '0', out);
 		break;
-	case 'l': // lower case
+	case 'l': /* lower case */
 		fputc(iswlower(c) ? '1' : '0', out);
 		break;
-	case 'P': // printable
+	case 'P': /* printable */
 		fputc(iswprint(c) ? '1' : '0', out);
 		break;
-	case 'p': // punctuation
+	case 'p': /* punctuation */
 		fputc(iswpunct(c) ? '1' : '0', out);
 		break;
-	case 's': // whitespace
+	case 's': /* whitespace */
 		fputc(iswspace(c) ? '1' : '0', out);
 		break;
-	case 'u': // upper case
+	case 'u': /* upper case */
 		fputc(iswupper(c) ? '1' : '0', out);
 		break;
-	case 'x': // xdigit
+	case 'x': /* xdigit */
 		fputc(iswxdigit(c) ? '1' : '0', out);
 		break;
 	}
 	case '%':
 		switch (*++format)
 		{
-		case 'c': // category
+		case 'c': /* category */
 			fputs(ucd_get_category_string(ucd_lookup_category(c)), out);
 			break;
-		case 'C': // category group
+		case 'C': /* category group */
 			fputs(ucd_get_category_group_string(ucd_lookup_category_group(c)), out);
 			break;
-		case 'p': // codepoint
+		case 'p': /* codepoint */
 			uprintf_codepoint(out, c, *++format);
 			break;
-		case 'P': // properties
+		case 'P': /* properties */
 			fprintf(out, "%016llx", ucd_properties(c, ucd_lookup_category(c)));
 			break;
-		case 'i': // is*
+		case 'i': /* is* */
 			uprintf_is(out, c, *++format);
 			break;
-		case 'L': // lowercase
+		case 'L': /* lowercase */
 			uprintf_codepoint(out, towlower(c), *++format);
 			break;
-		case 's': // script
+		case 's': /* script */
 			fputs(ucd_get_script_string(ucd_lookup_script(c)), out);
 			break;
-		case 'T': // titlecase
+		case 'T': /* titlecase */
 			uprintf_codepoint(out, ucd_totitle(c), *++format);
 			break;
-		case 'U': // uppercase
+		case 'U': /* uppercase */
 			uprintf_codepoint(out, towupper(c), *++format);
 			break;
 		}

tests/printucddata.c

 {
 	switch (mode)
 	{
-	case 'c': // character
+	case 'c': /* character */
 		switch (c)
 		{
 		case '\t': fputs("\\t", out);  break;
 		default:   fput_utf8c(out, c); break;
 		}
 		break;
-	case 'h': // hexadecimal (lower)
+	case 'h': /* hexadecimal (lower) */
 		fprintf(out, "%06x", c);
 		break;
-	case 'H': // hexadecimal (upper)
+	case 'H': /* hexadecimal (upper) */
 		fprintf(out, "%06X", c);
 		break;
 	}
 {
 	switch (mode)
 	{
-	case 'A': // alpha-numeric
+	case 'A': /* alpha-numeric */
 		fputc(ucd_isalnum(c) ? '1' : '0', out);
 		break;
-	case 'a': // alpha
+	case 'a': /* alpha */
 		fputc(ucd_isalpha(c) ? '1' : '0', out);
 		break;
-	case 'b': // blank
+	case 'b': /* blank */
 		fputc(ucd_isblank(c) ? '1' : '0', out);
 		break;
-	case 'c': // control
+	case 'c': /* control */
 		fputc(ucd_iscntrl(c) ? '1' : '0', out);
 		break;
-	case 'd': // numeric
+	case 'd': /* numeric */
 		fputc(ucd_isdigit(c) ? '1' : '0', out);
 		break;
-	case 'g': // glyph
+	case 'g': /* glyph */
 		fputc(ucd_isgraph(c) ? '1' : '0', out);
 		break;
-	case 'l': // lower case
+	case 'l': /* lower case */
 		fputc(ucd_islower(c) ? '1' : '0', out);
 		break;
-	case 'P': // printable
+	case 'P': /* printable */
 		fputc(ucd_isprint(c) ? '1' : '0', out);
 		break;
-	case 'p': // punctuation
+	case 'p': /* punctuation */
 		fputc(ucd_ispunct(c) ? '1' : '0', out);
 		break;
-	case 's': // whitespace
+	case 's': /* whitespace */
 		fputc(ucd_isspace(c) ? '1' : '0', out);
 		break;
-	case 'u': // upper case
+	case 'u': /* upper case */
 		fputc(ucd_isupper(c) ? '1' : '0', out);
 		break;
-	case 'x': // xdigit
+	case 'x': /* xdigit */
 		fputc(ucd_isxdigit(c) ? '1' : '0', out);
 		break;
 	}
 	case '%':
 		switch (*++format)
 		{
-		case 'c': // category
+		case 'c': /* category */
 			fputs(ucd_get_category_string(ucd_lookup_category(c)), out);
 			break;
-		case 'C': // category group
+		case 'C': /* category group */
 			fputs(ucd_get_category_group_string(ucd_lookup_category_group(c)), out);
 			break;
-		case 'p': // codepoint
+		case 'p': /* codepoint */
 			uprintf_codepoint(out, c, *++format);
 			break;
-		case 'P': // properties
+		case 'P': /* properties */
 			fprintf(out, "%016llx", ucd_properties(c, ucd_lookup_category(c)));
 			break;
-		case 'i': // is*
+		case 'i': /* is* */
 			uprintf_is(out, c, *++format);
 			break;
-		case 'L': // lowercase
+		case 'L': /* lowercase */
 			uprintf_codepoint(out, ucd_tolower(c), *++format);
 			break;
-		case 's': // script
+		case 's': /* script */
 			fputs(ucd_get_script_string(ucd_lookup_script(c)), out);
 			break;
-		case 'T': // titlecase
+		case 'T': /* titlecase */
 			uprintf_codepoint(out, ucd_totitle(c), *++format);
 			break;
-		case 'U': // uppercase
+		case 'U': /* uppercase */
 			uprintf_codepoint(out, ucd_toupper(c), *++format);
 			break;
 		}

tools/case.py

  * along with ucd-tools.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-// NOTE: This file is automatically generated from the UnicodeData.txt file in
-// the Unicode Character database by the ucd-tools/tools/categories.py script.
+/* NOTE: This file is automatically generated from the UnicodeData.txt file in
+ * the Unicode Character database by the ucd-tools/tools/categories.py script.
+ */
 
 #include "ucd/ucd.h"
 
 #include <stddef.h>
 
-// Unicode Character Data %s
+/* Unicode Character Data %s */
 
 struct case_conversion_entry
 {

tools/categories.py

  * along with ucd-tools.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-// NOTE: This file is automatically generated from the UnicodeData.txt file in
-// the Unicode Character database by the ucd-tools/tools/categories.py script.
+/* NOTE: This file is automatically generated from the UnicodeData.txt file in
+ * the Unicode Character database by the ucd-tools/tools/categories.py script.
+ */
 
 #include "ucd/ucd.h"
 
 #define Zs UCD_CATEGORY_Zs
 #define Ii UCD_CATEGORY_Ii
 
-// Unicode Character Data %s
+/* Unicode Character Data %s */
 """ % ucd_version)
 
 	for category in special_categories:
 			sys.stdout.write('{\n')
 			for codepoint, table in sorted(category_tables[table_index].items()):
 				if isinstance(table, str):
-					sys.stdout.write('\tcategories_%s, // %s\n' % (table, codepoint))
+					sys.stdout.write('\tcategories_%s, /* %s */\n' % (table, codepoint))
 				else:
 					sys.stdout.write('\tcategories_%s,\n' % codepoint)
 			sys.stdout.write('};\n')
 	sys.stdout.write('{\n')
 	for codepoints, category, comment in category_sets:
 		if category:
-			sys.stdout.write('\tif (c <= 0x%s) return %s; // %s : %s\n' % (codepoints.last, category, codepoints, comment))
+			sys.stdout.write('\tif (c <= 0x%s) return %s; /* %s : %s */\n' % (codepoints.last, category, codepoints, comment))
 		else:
-			sys.stdout.write('\tif (c <= 0x%s) // %s\n' % (codepoints.last, codepoints))
+			sys.stdout.write('\tif (c <= 0x%s) /* %s */\n' % (codepoints.last, codepoints))
 			sys.stdout.write('\t{\n')
 			sys.stdout.write('\t\tconst uint8_t *table = categories_%s_%s[(c - 0x%s) / 256];\n' % (codepoints.first, codepoints.last, codepoints.first))
 			sys.stdout.write('\t\treturn (ucd_category)table[c % 256];\n')
 			sys.stdout.write('\t}\n')
-	sys.stdout.write('\treturn Ii; // Invalid Unicode Codepoint\n')
+	sys.stdout.write('\treturn Ii; /* Invalid Unicode Codepoint */\n')
 	sys.stdout.write('}\n')
 
 	sys.stdout.write("""

tools/scripts.py

  * along with ucd-tools.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-// NOTE: This file is automatically generated from the Scripts.txt file in
-// the Unicode Character database by the ucd-tools/tools/scripts.py script.
+/* NOTE: This file is automatically generated from the Scripts.txt file in
+ * the Unicode Character database by the ucd-tools/tools/scripts.py script.
+ */
 
 #include "ucd/ucd.h"
 
 #define Zyyy UCD_SCRIPT_Zyyy
 #define Zzzz UCD_SCRIPT_Zzzz
 
-// Unicode Character Data %s
+/* Unicode Character Data %s */
 """ % ucd_version)
 
 	for script in special_scripts:
 			sys.stdout.write('{\n')
 			for codepoint, table in sorted(script_tables[table_index].items()):
 				if isinstance(table, str):
-					sys.stdout.write('\tscripts_%s, // %s\n' % (table, codepoint))
+					sys.stdout.write('\tscripts_%s, /* %s */\n' % (table, codepoint))
 				else:
 					sys.stdout.write('\tscripts_%s,\n' % codepoint)
 			sys.stdout.write('};\n')
 	sys.stdout.write('{\n')
 	for codepoints, script, comment in script_sets:
 		if script:
-			sys.stdout.write('\tif (c <= 0x%s) return %s; // %s : %s\n' % (codepoints.last, script, codepoints, comment))
+			sys.stdout.write('\tif (c <= 0x%s) return %s; /* %s : %s */\n' % (codepoints.last, script, codepoints, comment))
 		else:
-			sys.stdout.write('\tif (c <= 0x%s) // %s\n' % (codepoints.last, codepoints))
+			sys.stdout.write('\tif (c <= 0x%s) /* %s */\n' % (codepoints.last, codepoints))
 			sys.stdout.write('\t{\n')
 			sys.stdout.write('\t\tconst uint8_t *table = scripts_%s_%s[(c - 0x%s) / 256];\n' % (codepoints.first, codepoints.last, codepoints.first))
 			sys.stdout.write('\t\treturn (ucd_script)table[c % 256];\n')
 			sys.stdout.write('\t}\n')
-	sys.stdout.write('\treturn Zzzz; // Invalid Unicode Codepoint\n')
+	sys.stdout.write('\treturn Zzzz; /* Invalid Unicode Codepoint */\n')
 	sys.stdout.write('}\n')