-/* Copyright (C) 1995,1996,1998, 2000, 2001, 2004, 2006, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1998, 2000, 2001, 2004, 2006, 2008, 2009, 2010 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
#include <ctype.h>
#include <limits.h>
+#include <unicase.h>
+#include <unictype.h>
+
#include "libguile/_scm.h"
#include "libguile/validate.h"
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_eq_p, "char=?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is the same character as @var{y}, else @code{#f}.")
-#define FUNC_NAME s_scm_char_eq_p
+static SCM scm_i_char_eq_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_eq_p, "char=?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} if the Unicode code point of @var{x} is equal to the\n"
+ "code point of @var{y}, else @code{#f}.\n")
+#define FUNC_NAME s_scm_i_char_eq_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_eq_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_eq_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_eq_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_eq_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_less_p, "char<?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is less than @var{y} in the ASCII sequence,\n"
- "else @code{#f}.")
-#define FUNC_NAME s_scm_char_less_p
+static SCM scm_i_char_less_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_less_p, "char<?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} iff the code point of @var{x} is less than the code\n"
+ "point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_less_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_less_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_less_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_less_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_less_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_leq_p, "char<=?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is less than or equal to @var{y} in the\n"
- "ASCII sequence, else @code{#f}.")
-#define FUNC_NAME s_scm_char_leq_p
+static SCM scm_i_char_leq_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_leq_p, "char<=?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} if the Unicode code point of @var{x} is less than or\n"
+ "equal to the code point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_leq_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_leq_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_leq_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_leq_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_leq_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_gr_p, "char>?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is greater than @var{y} in the ASCII\n"
- "sequence, else @code{#f}.")
-#define FUNC_NAME s_scm_char_gr_p
+static SCM scm_i_char_gr_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_gr_p, "char>?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} if the Unicode code point of @var{x} is greater than\n"
+ "the code point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_gr_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_gr_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_gr_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_gr_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_gr_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_geq_p, "char>=?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is greater than or equal to @var{y} in the\n"
- "ASCII sequence, else @code{#f}.")
-#define FUNC_NAME s_scm_char_geq_p
+static SCM scm_i_char_geq_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_geq_p, "char>=?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} if the Unicode code point of @var{x} is greater than\n"
+ "or equal to the code point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_geq_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_geq_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_geq_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_geq_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_geq_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_ci_eq_p, "char-ci=?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is the same character as @var{y} ignoring\n"
- "case, else @code{#f}.")
-#define FUNC_NAME s_scm_char_ci_eq_p
+/* FIXME?: R6RS specifies that these comparisons are case-folded.
+ This is the same thing as comparing the uppercase characters in
+ practice, but, not in theory. Unicode has table containing their
+ definition of case-folded character mappings. A more correct
+ implementation would be to use that table and make a char-foldcase
+ function. */
+
+static SCM scm_i_char_ci_eq_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_ci_eq_p, "char-ci=?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} if the case-folded Unicode code point of @var{x} is\n"
+ "the same as the case-folded code point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_ci_eq_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_ci_eq_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_ci_eq_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_ci_eq_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_ci_eq_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_ci_less_p, "char-ci<?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is less than @var{y} in the ASCII sequence\n"
- "ignoring case, else @code{#f}.")
-#define FUNC_NAME s_scm_char_ci_less_p
+static SCM scm_i_char_ci_less_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_ci_less_p, "char-ci<?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} if the case-folded Unicode code point of @var{x} is\n"
+ "less than the case-folded code point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_ci_less_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_ci_less_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_ci_less_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_ci_less_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_ci_less_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_ci_leq_p, "char-ci<=?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is less than or equal to @var{y} in the\n"
- "ASCII sequence ignoring case, else @code{#f}.")
-#define FUNC_NAME s_scm_char_ci_leq_p
+static SCM scm_i_char_ci_leq_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_ci_leq_p, "char-ci<=?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} iff the case-folded Unicode code point of @var{x} is\n"
+ "less than or equal to the case-folded code point of @var{y}, else\n"
+ "@code{#f}")
+#define FUNC_NAME s_scm_i_char_ci_leq_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_ci_leq_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_ci_leq_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_ci_leq_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_ci_leq_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_ci_gr_p, "char-ci>?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is greater than @var{y} in the ASCII\n"
- "sequence ignoring case, else @code{#f}.")
-#define FUNC_NAME s_scm_char_ci_gr_p
+static SCM scm_i_char_ci_gr_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_ci_gr_p, "char-ci>?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} iff the case-folded code point of @var{x} is greater\n"
+ "than the case-folded code point of @var{y}, else @code{#f}.")
+#define FUNC_NAME s_scm_i_char_ci_gr_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_ci_gr_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_ci_gr_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_ci_gr_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_ci_gr_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
}
#undef FUNC_NAME
-SCM_DEFINE1 (scm_char_ci_geq_p, "char-ci>=?", scm_tc7_rpsubr,
- (SCM x, SCM y),
- "Return @code{#t} iff @var{x} is greater than or equal to @var{y} in the\n"
- "ASCII sequence ignoring case, else @code{#f}.")
-#define FUNC_NAME s_scm_char_ci_geq_p
+static SCM scm_i_char_ci_geq_p (SCM x, SCM y, SCM rest);
+SCM_DEFINE (scm_i_char_ci_geq_p, "char-ci>=?", 0, 2, 1,
+ (SCM x, SCM y, SCM rest),
+ "Return @code{#t} iff the case-folded Unicode code point of @var{x} is\n"
+ "greater than or equal to the case-folded code point of @var{y}, else\n"
+ "@code{#f}.")
+#define FUNC_NAME s_scm_i_char_ci_geq_p
+{
+ if (SCM_UNBNDP (x) || SCM_UNBNDP (y))
+ return SCM_BOOL_T;
+ while (!scm_is_null (rest))
+ {
+ if (scm_is_false (scm_char_ci_geq_p (x, y)))
+ return SCM_BOOL_F;
+ x = y;
+ y = scm_car (rest);
+ rest = scm_cdr (rest);
+ }
+ return scm_char_ci_geq_p (x, y);
+}
+#undef FUNC_NAME
+
+SCM scm_char_ci_geq_p (SCM x, SCM y)
+#define FUNC_NAME s_scm_i_char_ci_geq_p
{
SCM_VALIDATE_CHAR (1, x);
SCM_VALIDATE_CHAR (2, y);
#undef FUNC_NAME
-
SCM_DEFINE (scm_char_upper_case_p, "char-upper-case?", 1, 0, 0,
(SCM chr),
"Return @code{#t} iff @var{chr} is uppercase, else @code{#f}.\n")
}
#undef FUNC_NAME
-
-
SCM_DEFINE (scm_char_is_both_p, "char-is-both?", 1, 0, 0,
(SCM chr),
- "Return @code{#t} iff @var{chr} is either uppercase or lowercase, else @code{#f}.\n")
+ "Return @code{#t} iff @var{chr} is either uppercase or lowercase, else\n"
+ "@code{#f}.\n")
#define FUNC_NAME s_scm_char_is_both_p
{
if (scm_is_true (scm_char_set_contains_p (scm_char_set_lower_case, chr)))
#undef FUNC_NAME
-
-
SCM_DEFINE (scm_char_to_integer, "char->integer", 1, 0, 0,
(SCM chr),
- "Return the number corresponding to ordinal position of @var{chr} in the\n"
- "ASCII sequence.")
+ "Return the Unicode code point of @var{chr}.")
#define FUNC_NAME s_scm_char_to_integer
{
SCM_VALIDATE_CHAR (1, chr);
- return scm_from_ulong (SCM_CHAR(chr));
+ return scm_from_uint32 (SCM_CHAR(chr));
}
#undef FUNC_NAME
-
SCM_DEFINE (scm_integer_to_char, "integer->char", 1, 0, 0,
(SCM n),
- "Return the character at position @var{n} in the ASCII sequence.")
+ "Return the character that has Unicode code point @var{n}. The integer\n"
+ "@var{n} must be a valid code point. Valid code points are in the\n"
+ "ranges 0 to @code{#xD7FF} inclusive or @code{#xE000} to\n"
+ "@code{#x10FFFF} inclusive.")
#define FUNC_NAME s_scm_integer_to_char
{
- return SCM_MAKE_CHAR (scm_to_uchar (n));
+ scm_t_wchar cn;
+
+ cn = scm_to_wchar (n);
+
+ /* Avoid the surrogates. */
+ if (!SCM_IS_UNICODE_CHAR (cn))
+ scm_out_of_range (FUNC_NAME, n);
+
+ return SCM_MAKE_CHAR (cn);
}
#undef FUNC_NAME
#define FUNC_NAME s_scm_char_upcase
{
SCM_VALIDATE_CHAR (1, chr);
- return SCM_MAKE_CHAR (toupper (SCM_CHAR (chr)));
+ return SCM_MAKE_CHAR (scm_c_upcase (SCM_CHAR (chr)));
}
#undef FUNC_NAME
#define FUNC_NAME s_scm_char_downcase
{
SCM_VALIDATE_CHAR (1, chr);
- return SCM_MAKE_CHAR (tolower (SCM_CHAR(chr)));
+ return SCM_MAKE_CHAR (scm_c_downcase (SCM_CHAR(chr)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_char_titlecase, "char-titlecase", 1, 0, 0,
+ (SCM chr),
+ "Return the titlecase character version of @var{chr}.")
+#define FUNC_NAME s_scm_char_titlecase
+{
+ SCM_VALIDATE_CHAR (1, chr);
+ return SCM_MAKE_CHAR (scm_c_titlecase (SCM_CHAR(chr)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_char_general_category, "char-general-category", 1, 0, 0,
+ (SCM chr),
+ "Return a symbol representing the Unicode general category of "
+ "@var{chr} or @code{#f} if a named category cannot be found.")
+#define FUNC_NAME s_scm_char_general_category
+{
+ const char *sym;
+ uc_general_category_t cat;
+
+ SCM_VALIDATE_CHAR (1, chr);
+ cat = uc_general_category (SCM_CHAR (chr));
+ sym = uc_general_category_name (cat);
+
+ if (sym != NULL)
+ return scm_from_locale_symbol (sym);
+ return SCM_BOOL_F;
}
#undef FUNC_NAME
*/
-int
-scm_c_upcase (unsigned int c)
-{
- if (c <= UCHAR_MAX)
- return toupper (c);
- else
- return c;
-}
-
-
-int
-scm_c_downcase (unsigned int c)
-{
- if (c <= UCHAR_MAX)
- return tolower (c);
- else
- return c;
-}
-
-
-#ifdef _DCC
-# define ASCII
-#else
-# if (('\n'=='\025') && (' '=='\100') && ('a'=='\201') && ('A'=='\301'))
-# define EBCDIC
-# endif /* (('\n'=='\025') && (' '=='\100') && ('a'=='\201') && ('A'=='\301')) */
-# if (('\n'=='\012') && (' '=='\040') && ('a'=='\141') && ('A'=='\101'))
-# define ASCII
-# endif /* (('\n'=='\012') && (' '=='\040') && ('a'=='\141') && ('A'=='\101')) */
-#endif /* def _DCC */
-
-
-#ifdef EBCDIC
-char *const scm_charnames[] =
-{
- "nul", "soh", "stx", "etx", "pf", "ht", "lc", "del",
- 0 , 0 , "smm", "vt", "ff", "cr", "so", "si",
- "dle", "dc1", "dc2", "dc3", "res", "nl", "bs", "il",
- "can", "em", "cc", 0 , "ifs", "igs", "irs", "ius",
- "ds", "sos", "fs", 0 , "byp", "lf", "eob", "pre",
- 0 , 0 , "sm", 0 , 0 , "enq", "ack", "bel",
- 0 , 0 , "syn", 0 , "pn", "rs", "uc", "eot",
- 0 , 0 , 0 , 0 , "dc4", "nak", 0 , "sub",
- "space", scm_s_newline, "tab", "backspace", "return", "page", "null"};
-
-const char scm_charnums[] =
-"\000\001\002\003\004\005\006\007\
-\010\011\012\013\014\015\016\017\
-\020\021\022\023\024\025\026\027\
-\030\031\032\033\034\035\036\037\
-\040\041\042\043\044\045\046\047\
-\050\051\052\053\054\055\056\057\
-\060\061\062\063\064\065\066\067\
-\070\071\072\073\074\075\076\077\
- \n\t\b\r\f\0";
-#endif /* def EBCDIC */
-#ifdef ASCII
-char *const scm_charnames[] =
-{
- "nul","soh","stx","etx","eot","enq","ack","bel",
- "bs", "ht", "newline", "vt", "np", "cr", "so", "si",
- "dle","dc1","dc2","dc3","dc4","nak","syn","etb",
- "can", "em","sub","esc", "fs", "gs", "rs", "us",
- "space", "sp", "nl", "tab", "backspace", "return", "page", "null", "del"};
-const char scm_charnums[] =
-"\000\001\002\003\004\005\006\007\
-\010\011\012\013\014\015\016\017\
-\020\021\022\023\024\025\026\027\
-\030\031\032\033\034\035\036\037\
- \n\t\b\r\f\0\177";
-#endif /* def ASCII */
-
-int scm_n_charnames = sizeof (scm_charnames) / sizeof (char *);
+scm_t_wchar
+scm_c_upcase (scm_t_wchar c)
+{
+ return uc_toupper ((int) c);
+}
+
+
+scm_t_wchar
+scm_c_downcase (scm_t_wchar c)
+{
+ return uc_tolower ((int) c);
+}
+
+scm_t_wchar
+scm_c_titlecase (scm_t_wchar c)
+{
+ return uc_totitle ((int) c);
+}
+\f
+
+/* There are a few sets of character names: R5RS, Guile
+ extensions for control characters, and leftover Guile extensions.
+ They are listed in order of precedence. */
+
+static const char *const scm_r5rs_charnames[] = {
+ "space", "newline"
+};
+
+static const scm_t_uint32 const scm_r5rs_charnums[] = {
+ 0x20, 0x0a
+};
+
+#define SCM_N_R5RS_CHARNAMES (sizeof (scm_r5rs_charnames) / sizeof (char *))
+
+static const char *const scm_r6rs_charnames[] = {
+ "nul", "alarm", "backspace", "tab", "linefeed", "vtab", "page",
+ "return", "esc", "delete"
+ /* 'space' and 'newline' are already included from the R5RS list. */
+};
+
+static const scm_t_uint32 const scm_r6rs_charnums[] = {
+ 0x00, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
+ 0x0d, 0x1b, 0x7f
+};
+
+#define SCM_N_R6RS_CHARNAMES (sizeof (scm_r6rs_charnames) / sizeof (char *))
+
+/* The abbreviated names for control characters. */
+static const char *const scm_C0_control_charnames[] = {
+ /* C0 controls */
+ "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
+ "bs", "ht", "lf", "vt", "ff", "cr", "so", "si",
+ "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
+ "can", "em", "sub", "esc", "fs", "gs", "rs", "us",
+ "sp", "del"
+};
+
+static const scm_t_uint32 const scm_C0_control_charnums[] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ 0x20, 0x7f
+};
+
+#define SCM_N_C0_CONTROL_CHARNAMES (sizeof (scm_C0_control_charnames) / sizeof (char *))
+
+static const char *const scm_alt_charnames[] = {
+ "null", "nl", "np"
+};
+
+static const scm_t_uint32 const scm_alt_charnums[] = {
+ 0x00, 0x0a, 0x0c
+};
+
+#define SCM_N_ALT_CHARNAMES (sizeof (scm_alt_charnames) / sizeof (char *))
+
+/* Returns the string charname for a character if it exists, or NULL
+ otherwise. */
+const char *
+scm_i_charname (SCM chr)
+{
+ size_t c;
+ scm_t_uint32 i = SCM_CHAR (chr);
+
+ for (c = 0; c < SCM_N_R5RS_CHARNAMES; c++)
+ if (scm_r5rs_charnums[c] == i)
+ return scm_r5rs_charnames[c];
+
+ for (c = 0; c < SCM_N_R6RS_CHARNAMES; c++)
+ if (scm_r6rs_charnums[c] == i)
+ return scm_r6rs_charnames[c];
+
+ for (c = 0; c < SCM_N_C0_CONTROL_CHARNAMES; c++)
+ if (scm_C0_control_charnums[c] == i)
+ return scm_C0_control_charnames[c];
+
+ /* Since the characters in scm_alt_charnums is a subset of
+ scm_C0_control_charnums, this code is never reached. */
+ for (c = 0; c < SCM_N_ALT_CHARNAMES; c++)
+ if (scm_alt_charnums[c] == i)
+ return scm_alt_charnames[c];
+
+ return NULL;
+}
+
+/* Return a character from a string charname. */
+SCM
+scm_i_charname_to_char (const char *charname, size_t charname_len)
+{
+ size_t c;
+
+ /* The R5RS charnames. These are supposed to be case insensitive. */
+ for (c = 0; c < SCM_N_R5RS_CHARNAMES; c++)
+ if ((strlen (scm_r5rs_charnames[c]) == charname_len)
+ && (!strncasecmp (scm_r5rs_charnames[c], charname, charname_len)))
+ return SCM_MAKE_CHAR (scm_r5rs_charnums[c]);
+
+ /* The R6RS charnames. R6RS says that these should be case-sensitive. They
+ are left as case-insensitive to avoid confusion. */
+ for (c = 0; c < SCM_N_R6RS_CHARNAMES; c++)
+ if ((strlen (scm_r6rs_charnames[c]) == charname_len)
+ && (!strncasecmp (scm_r6rs_charnames[c], charname, charname_len)))
+ return SCM_MAKE_CHAR (scm_r6rs_charnums[c]);
+
+ /* Then come the controls. By Guile convention, these are not case
+ sensitive. */
+ for (c = 0; c < SCM_N_C0_CONTROL_CHARNAMES; c++)
+ if ((strlen (scm_C0_control_charnames[c]) == charname_len)
+ && (!strncasecmp (scm_C0_control_charnames[c], charname, charname_len)))
+ return SCM_MAKE_CHAR (scm_C0_control_charnums[c]);
+
+ /* Lastly are some old names carried over for compatibility. */
+ for (c = 0; c < SCM_N_ALT_CHARNAMES; c++)
+ if ((strlen (scm_alt_charnames[c]) == charname_len)
+ && (!strncasecmp (scm_alt_charnames[c], charname, charname_len)))
+ return SCM_MAKE_CHAR (scm_alt_charnums[c]);
+
+ return SCM_BOOL_F;
+}
\f
HCoop / bpt / guile.git / blobdiff