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(char_to_string_1): Extracted from char_to_string.

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Return -1 instead of signaling an error.
(char_to_string): Use it.
This commit is contained in:
Gerd Moellmann 2001-07-13 09:30:42 +00:00
parent ea9dd0918a
commit 12bcae0584
1 changed files with 29 additions and 8 deletions
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37
src/charset.c
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@ -1,6 +1,7 @@
/* Basic multilingual character support.
Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN.
Licensed to the Free Software Foundation.
Copyright (C) 2001 Free Software Foundation, Inc.
This file is part of GNU Emacs.
@ -160,13 +161,10 @@ invalid_character (c)
/* Store multi-byte form of the character C in STR. The caller should
allocate at least 4-byte area at STR in advance. Returns the
length of the multi-byte form. If C is an invalid character code,
signal an error.
Use macro `CHAR_STRING (C, STR)' instead of calling this function
directly if C can be an ASCII character. */
return -1. */
int
char_to_string (c, str)
char_to_string_1 (c, str)
int c;
unsigned char *str;
{
@ -176,7 +174,7 @@ char_to_string (c, str)
{
/* Multibyte character can't have a modifier bit. */
if (! SINGLE_BYTE_CHAR_P ((c & ~CHAR_MODIFIER_MASK)))
invalid_character (c);
return -1;
/* For Meta, Shift, and Control modifiers, we need special care. */
if (c & CHAR_META)
@ -211,6 +209,7 @@ char_to_string (c, str)
/* If C still has any modifier bits, just ignore it. */
c &= ~CHAR_MODIFIER_MASK;
}
if (SINGLE_BYTE_CHAR_P (c))
{
if (ASCII_BYTE_P (c) || c >= 0xA0)
@ -237,7 +236,7 @@ char_to_string (c, str)
: LEADING_CODE_PRIVATE_22)));
*p++ = charset;
if (c1 > 0 && c1 < 32 || c2 > 0 && c2 < 32)
invalid_character (c);
return -1;
if (c1)
{
*p++ = c1 | 0x80;
@ -246,11 +245,33 @@ char_to_string (c, str)
}
}
else
invalid_character (c);
return -1;
return (p - str);
}
/* Store multi-byte form of the character C in STR. The caller should
allocate at least 4-byte area at STR in advance. Returns the
length of the multi-byte form. If C is an invalid character code,
signal an error.
Use macro `CHAR_STRING (C, STR)' instead of calling this function
directly if C can be an ASCII character. */
int
char_to_string (c, str)
int c;
unsigned char *str;
{
int len;
len = char_to_string_1 (c, str);
if (len == -1)
invalid_character (c);
return len;
}
/* Return the non-ASCII character corresponding to multi-byte form at
STR of length LEN. If ACTUAL_LEN is not NULL, store the byte
length of the multibyte form in *ACTUAL_LEN.