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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-23 10:34:07 +00:00
emacs/lib/c-ctype.c
2013-01-01 09:11:05 +00:00

396 lines
11 KiB
C

/* Character handling in C locale.
Copyright 2000-2003, 2006, 2009-2013 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#define NO_C_CTYPE_MACROS
#include "c-ctype.h"
/* The function isascii is not locale dependent. Its use in EBCDIC is
questionable. */
bool
c_isascii (int c)
{
return (c >= 0x00 && c <= 0x7f);
}
bool
c_isalnum (int c)
{
#if C_CTYPE_CONSECUTIVE_DIGITS \
&& C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
#if C_CTYPE_ASCII
return ((c >= '0' && c <= '9')
|| ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z'));
#else
return ((c >= '0' && c <= '9')
|| (c >= 'A' && c <= 'Z')
|| (c >= 'a' && c <= 'z'));
#endif
#else
switch (c)
{
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
return 1;
default:
return 0;
}
#endif
}
bool
c_isalpha (int c)
{
#if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
#if C_CTYPE_ASCII
return ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z');
#else
return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
#endif
#else
switch (c)
{
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
return 1;
default:
return 0;
}
#endif
}
bool
c_isblank (int c)
{
return (c == ' ' || c == '\t');
}
bool
c_iscntrl (int c)
{
#if C_CTYPE_ASCII
return ((c & ~0x1f) == 0 || c == 0x7f);
#else
switch (c)
{
case ' ': case '!': case '"': case '#': case '$': case '%':
case '&': case '\'': case '(': case ')': case '*': case '+':
case ',': case '-': case '.': case '/':
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
case ':': case ';': case '<': case '=': case '>': case '?':
case '@':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
case '[': case '\\': case ']': case '^': case '_': case '`':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
case '{': case '|': case '}': case '~':
return 0;
default:
return 1;
}
#endif
}
bool
c_isdigit (int c)
{
#if C_CTYPE_CONSECUTIVE_DIGITS
return (c >= '0' && c <= '9');
#else
switch (c)
{
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
return 1;
default:
return 0;
}
#endif
}
bool
c_islower (int c)
{
#if C_CTYPE_CONSECUTIVE_LOWERCASE
return (c >= 'a' && c <= 'z');
#else
switch (c)
{
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
return 1;
default:
return 0;
}
#endif
}
bool
c_isgraph (int c)
{
#if C_CTYPE_ASCII
return (c >= '!' && c <= '~');
#else
switch (c)
{
case '!': case '"': case '#': case '$': case '%': case '&':
case '\'': case '(': case ')': case '*': case '+': case ',':
case '-': case '.': case '/':
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
case ':': case ';': case '<': case '=': case '>': case '?':
case '@':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
case '[': case '\\': case ']': case '^': case '_': case '`':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
case '{': case '|': case '}': case '~':
return 1;
default:
return 0;
}
#endif
}
bool
c_isprint (int c)
{
#if C_CTYPE_ASCII
return (c >= ' ' && c <= '~');
#else
switch (c)
{
case ' ': case '!': case '"': case '#': case '$': case '%':
case '&': case '\'': case '(': case ')': case '*': case '+':
case ',': case '-': case '.': case '/':
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
case ':': case ';': case '<': case '=': case '>': case '?':
case '@':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
case '[': case '\\': case ']': case '^': case '_': case '`':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
case '{': case '|': case '}': case '~':
return 1;
default:
return 0;
}
#endif
}
bool
c_ispunct (int c)
{
#if C_CTYPE_ASCII
return ((c >= '!' && c <= '~')
&& !((c >= '0' && c <= '9')
|| ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'Z')));
#else
switch (c)
{
case '!': case '"': case '#': case '$': case '%': case '&':
case '\'': case '(': case ')': case '*': case '+': case ',':
case '-': case '.': case '/':
case ':': case ';': case '<': case '=': case '>': case '?':
case '@':
case '[': case '\\': case ']': case '^': case '_': case '`':
case '{': case '|': case '}': case '~':
return 1;
default:
return 0;
}
#endif
}
bool
c_isspace (int c)
{
return (c == ' ' || c == '\t'
|| c == '\n' || c == '\v' || c == '\f' || c == '\r');
}
bool
c_isupper (int c)
{
#if C_CTYPE_CONSECUTIVE_UPPERCASE
return (c >= 'A' && c <= 'Z');
#else
switch (c)
{
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
return 1;
default:
return 0;
}
#endif
}
bool
c_isxdigit (int c)
{
#if C_CTYPE_CONSECUTIVE_DIGITS \
&& C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
#if C_CTYPE_ASCII
return ((c >= '0' && c <= '9')
|| ((c & ~0x20) >= 'A' && (c & ~0x20) <= 'F'));
#else
return ((c >= '0' && c <= '9')
|| (c >= 'A' && c <= 'F')
|| (c >= 'a' && c <= 'f'));
#endif
#else
switch (c)
{
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
return 1;
default:
return 0;
}
#endif
}
int
c_tolower (int c)
{
#if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
return (c >= 'A' && c <= 'Z' ? c - 'A' + 'a' : c);
#else
switch (c)
{
case 'A': return 'a';
case 'B': return 'b';
case 'C': return 'c';
case 'D': return 'd';
case 'E': return 'e';
case 'F': return 'f';
case 'G': return 'g';
case 'H': return 'h';
case 'I': return 'i';
case 'J': return 'j';
case 'K': return 'k';
case 'L': return 'l';
case 'M': return 'm';
case 'N': return 'n';
case 'O': return 'o';
case 'P': return 'p';
case 'Q': return 'q';
case 'R': return 'r';
case 'S': return 's';
case 'T': return 't';
case 'U': return 'u';
case 'V': return 'v';
case 'W': return 'w';
case 'X': return 'x';
case 'Y': return 'y';
case 'Z': return 'z';
default: return c;
}
#endif
}
int
c_toupper (int c)
{
#if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
return (c >= 'a' && c <= 'z' ? c - 'a' + 'A' : c);
#else
switch (c)
{
case 'a': return 'A';
case 'b': return 'B';
case 'c': return 'C';
case 'd': return 'D';
case 'e': return 'E';
case 'f': return 'F';
case 'g': return 'G';
case 'h': return 'H';
case 'i': return 'I';
case 'j': return 'J';
case 'k': return 'K';
case 'l': return 'L';
case 'm': return 'M';
case 'n': return 'N';
case 'o': return 'O';
case 'p': return 'P';
case 'q': return 'Q';
case 'r': return 'R';
case 's': return 'S';
case 't': return 'T';
case 'u': return 'U';
case 'v': return 'V';
case 'w': return 'W';
case 'x': return 'X';
case 'y': return 'Y';
case 'z': return 'Z';
default: return c;
}
#endif
}