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|
/* Input routines.
Copyright (C) 1989-1998, 2002-2004, 2011, 2017-2018, 2025 Free Software Foundation, Inc.
Written by Douglas C. Schmidt <schmidt@ics.uci.edu>
and Bruno Haible <bruno@clisp.org>.
This file is part of GNU GPERF.
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 <https://www.gnu.org/licenses/>. */
/* Specification. */
#include "input.h"
#include <stdio.h>
#include <stdlib.h> /* declares exit() */
#include <string.h> /* declares strncpy(), strchr() */
#include <limits.h> /* defines UCHAR_MAX etc. */
#include "options.h"
#include "getline.h"
template <class KT>
Input<KT>::Input (FILE *stream, Keyword_Factory<KT> *keyword_factory)
: _stream (stream), _factory (keyword_factory)
{
}
/* Returns a pretty representation of the input file name, for error and
warning messages. */
static const char *
pretty_input_file_name ()
{
if (option.get_input_file_name ())
return option.get_input_file_name ();
else
return "(standard input)";
}
/* Returns true if the given line contains a "%DECL" declaration. */
static bool
is_declaration (const char *line, const char *line_end, unsigned int lineno,
const char *decl)
{
/* Skip '%'. */
line++;
/* Skip DECL. */
for (const char *d = decl; *d; d++)
{
if (!(line < line_end))
return false;
if (!(*line == *d || (*d == '-' && *line == '_')))
return false;
line++;
}
if (line < line_end
&& ((*line >= 'A' && *line <= 'Z')
|| (*line >= 'a' && *line <= 'z')
|| *line == '-' || *line == '_'))
return false;
/* OK, found DECL. */
/* Skip whitespace. */
while (line < line_end && (*line == ' ' || *line == '\t'))
line++;
/* Expect end of line. */
if (line < line_end && *line != '\n')
{
fprintf (stderr, "%s:%u: junk after declaration\n",
pretty_input_file_name (), lineno);
exit (1);
}
return true;
}
/* Tests if the given line contains a "%DECL=ARG" declaration.
If yes, it sets *ARGP to the argument, and returns true.
Otherwise, it returns false. */
static bool
is_declaration_with_arg (const char *line, const char *line_end,
unsigned int lineno,
const char *decl, char **argp)
{
/* Skip '%'. */
line++;
/* Skip DECL. */
for (const char *d = decl; *d; d++)
{
if (!(line < line_end))
return false;
if (!(*line == *d || (*d == '-' && *line == '_')))
return false;
line++;
}
if (line < line_end
&& ((*line >= 'A' && *line <= 'Z')
|| (*line >= 'a' && *line <= 'z')
|| *line == '-' || *line == '_'))
return false;
/* OK, found DECL. */
/* Skip '='. */
if (!(line < line_end && *line == '='))
{
fprintf (stderr, "%s:%u: missing argument in %%%s=ARG declaration.\n",
pretty_input_file_name (), lineno, decl);
exit (1);
}
line++;
/* The next word is the argument. */
char *arg = new char[line_end - line + 1];
char *p = arg;
while (line < line_end && !(*line == ' ' || *line == '\t' || *line == '\n'))
*p++ = *line++;
*p = '\0';
/* Skip whitespace. */
while (line < line_end && (*line == ' ' || *line == '\t'))
line++;
/* Expect end of line. */
if (line < line_end && *line != '\n')
{
fprintf (stderr, "%s:%u: junk after declaration\n",
pretty_input_file_name (), lineno);
exit (1);
}
*argp = arg;
return true;
}
/* Tests if the given line contains a "%define DECL ARG" declaration.
If yes, it sets *ARGP to the argument, and returns true.
Otherwise, it returns false. */
static bool
is_define_declaration (const char *line, const char *line_end,
unsigned int lineno,
const char *decl, char **argp)
{
/* Skip '%'. */
line++;
/* Skip "define". */
{
for (const char *d = "define"; *d; d++)
{
if (!(line < line_end))
return false;
if (!(*line == *d))
return false;
line++;
}
if (!(line < line_end && (*line == ' ' || *line == '\t')))
return false;
}
/* Skip whitespace. */
while (line < line_end && (*line == ' ' || *line == '\t'))
line++;
/* Skip DECL. */
for (const char *d = decl; *d; d++)
{
if (!(line < line_end))
return false;
if (!(*line == *d || (*d == '-' && *line == '_')))
return false;
line++;
}
if (line < line_end
&& ((*line >= 'A' && *line <= 'Z')
|| (*line >= 'a' && *line <= 'z')
|| *line == '-' || *line == '_'))
return false;
/* OK, found DECL. */
/* Skip whitespace. */
if (!(line < line_end && (*line == ' ' || *line == '\t')))
{
fprintf (stderr, "%s:%u:"
" missing argument in %%define %s ARG declaration.\n",
pretty_input_file_name (), lineno, decl);
exit (1);
}
do
line++;
while (line < line_end && (*line == ' ' || *line == '\t'));
/* The next word is the argument. */
char *arg = new char[line_end - line + 1];
char *p = arg;
while (line < line_end && !(*line == ' ' || *line == '\t' || *line == '\n'))
*p++ = *line++;
*p = '\0';
/* Skip whitespace. */
while (line < line_end && (*line == ' ' || *line == '\t'))
line++;
/* Expect end of line. */
if (line < line_end && *line != '\n')
{
fprintf (stderr, "%s:%u: junk after declaration\n",
pretty_input_file_name (), lineno);
exit (1);
}
*argp = arg;
return true;
}
/* Reads the entire input file. */
template <class KT>
void
Input<KT>::read_input ()
{
/* The input file has the following structure:
DECLARATIONS
%%
KEYWORDS
%%
ADDITIONAL_CODE
Since the DECLARATIONS and the ADDITIONAL_CODE sections are optional,
we have to read the entire file in the case there is only one %%
separator line, in order to determine whether the structure is
DECLARATIONS
%%
KEYWORDS
or
KEYWORDS
%%
ADDITIONAL_CODE
When the option -t is given or when the first section contains
declaration lines starting with %, we go for the first interpretation,
otherwise for the second interpretation. */
char *input = NULL;
size_t input_size = 0;
int input_length = get_delim (&input, &input_size, EOF, _stream);
if (input_length < 0)
{
if (ferror (_stream))
fprintf (stderr, "%s: error while reading input file\n",
pretty_input_file_name ());
else
fprintf (stderr, "%s: The input file is empty!\n",
pretty_input_file_name ());
exit (1);
}
/* Convert CR/LF line terminators (Windows) to LF line terminators (Unix).
GCC 3.3 and newer support CR/LF line terminators in C sources on Unix,
so we do the same.
The so-called "text mode" in stdio on Windows translates CR/LF to \n
automatically, but here we also need this conversion on Unix. As a side
effect, on Windows we also parse CR/CR/LF into a single \n, but this
is not a problem. */
{
char *p = input;
char *p_end = input + input_length;
/* Converting the initial segment without CRs is a no-op. */
while (p < p_end && *p != '\r')
p++;
/* Then start the conversion for real. */
char *q = p;
while (p < p_end)
{
if (p[0] == '\r' && p + 1 < p_end && p[1] == '\n')
p++;
*q++ = *p++;
}
input_length = q - input;
}
/* We use input_end as a limit, in order to cope with NUL bytes in the
input. But note that one trailing NUL byte has been added after
input_end, for convenience. */
char *input_end = input + input_length;
const char *declarations;
const char *declarations_end;
const char *keywords;
const char *keywords_end;
unsigned int keywords_lineno;
/* Break up the input into the three sections. */
{
const char *separator[2] = { NULL, NULL };
unsigned int separator_lineno[2] = { 0, 0 };
int separators = 0;
{
unsigned int lineno = 1;
for (const char *p = input; p < input_end; )
{
if (p[0] == '%' && p[1] == '%')
{
separator[separators] = p;
separator_lineno[separators] = lineno;
if (++separators == 2)
break;
}
lineno++;
p = (const char *) memchr (p, '\n', input_end - p);
if (p != NULL)
p++;
else
p = input_end;
}
}
bool has_declarations;
if (separators == 1)
{
if (option[TYPE])
has_declarations = true;
else
{
has_declarations = false;
for (const char *p = input; p < separator[0]; )
{
if (p[0] == '%')
{
has_declarations = true;
break;
}
p = (const char *) memchr (p, '\n', separator[0] - p);
if (p != NULL)
p++;
else
p = separator[0];
}
}
}
else
has_declarations = (separators > 0);
if (has_declarations)
{
declarations = input;
declarations_end = separator[0];
/* Give a warning if the separator line is nonempty. */
bool nonempty_line = false;
const char *p;
for (p = declarations_end + 2; p < input_end; )
{
if (*p == '\n')
{
p++;
break;
}
if (!(*p == ' ' || *p == '\t'))
nonempty_line = true;
p++;
}
if (nonempty_line)
fprintf (stderr, "%s:%u: warning: junk after %%%% is ignored\n",
pretty_input_file_name (), separator_lineno[0]);
keywords = p;
keywords_lineno = separator_lineno[0] + 1;
}
else
{
declarations = NULL;
declarations_end = NULL;
keywords = input;
keywords_lineno = 1;
}
if (separators > (has_declarations ? 1 : 0))
{
keywords_end = separator[separators-1];
_verbatim_code = separator[separators-1] + 2;
_verbatim_code_end = input_end;
_verbatim_code_lineno = separator_lineno[separators-1];
}
else
{
keywords_end = input_end;
_verbatim_code = NULL;
_verbatim_code_end = NULL;
_verbatim_code_lineno = 0;
}
}
/* Parse the declarations section. */
_verbatim_declarations = NULL;
_verbatim_declarations_end = NULL;
_verbatim_declarations_lineno = 0;
_struct_decl = NULL;
_struct_decl_lineno = 0;
_return_type = NULL;
_struct_tag = NULL;
{
unsigned int lineno = 1;
char *struct_decl = NULL;
unsigned int *struct_decl_linenos = NULL;
unsigned int struct_decl_linecount = 0;
for (const char *line = declarations; line < declarations_end; )
{
const char *line_end;
line_end = (const char *) memchr (line, '\n', declarations_end - line);
if (line_end != NULL)
line_end++;
else
line_end = declarations_end;
if (*line == '%')
{
if (line[1] == '{')
{
/* Handle %{. */
if (_verbatim_declarations != NULL)
{
fprintf (stderr, "%s:%u:\n%s:%u:"
" only one %%{...%%} section is allowed\n",
pretty_input_file_name (),
_verbatim_declarations_lineno,
pretty_input_file_name (), lineno);
exit (1);
}
_verbatim_declarations = line + 2;
_verbatim_declarations_lineno = lineno;
}
else if (line[1] == '}')
{
/* Handle %}. */
if (_verbatim_declarations == NULL)
{
fprintf (stderr, "%s:%u:"
" %%} outside of %%{...%%} section\n",
pretty_input_file_name (), lineno);
exit (1);
}
if (_verbatim_declarations_end != NULL)
{
fprintf (stderr, "%s:%u:"
" %%{...%%} section already closed\n",
pretty_input_file_name (), lineno);
exit (1);
}
_verbatim_declarations_end = line;
/* Give a warning if the rest of the line is nonempty. */
bool nonempty_line = false;
const char *q;
for (q = line + 2; q < line_end; q++)
{
if (*q == '\n')
{
q++;
break;
}
if (!(*q == ' ' || *q == '\t'))
nonempty_line = true;
}
if (nonempty_line)
fprintf (stderr, "%s:%u:"
" warning: junk after %%} is ignored\n",
pretty_input_file_name (), lineno);
}
else if (_verbatim_declarations != NULL
&& _verbatim_declarations_end == NULL)
{
fprintf (stderr, "%s:%u:"
" warning: %% directives are ignored"
" inside the %%{...%%} section\n",
pretty_input_file_name (), lineno);
}
else
{
char *arg;
if (is_declaration_with_arg (line, line_end, lineno,
"delimiters", &arg))
option.set_delimiters (arg);
else
if (is_declaration (line, line_end, lineno, "struct-type"))
option.set (TYPE);
else
if (is_declaration (line, line_end, lineno, "ignore-case"))
option.set (UPPERLOWER);
else
if (is_declaration_with_arg (line, line_end, lineno,
"language", &arg))
option.set_language (arg);
else
if (is_define_declaration (line, line_end, lineno,
"slot-name", &arg))
option.set_slot_name (arg);
else
if (is_define_declaration (line, line_end, lineno,
"initializer-suffix", &arg))
option.set_initializer_suffix (arg);
else
if (is_define_declaration (line, line_end, lineno,
"hash-function-name", &arg))
option.set_hash_name (arg);
else
if (is_define_declaration (line, line_end, lineno,
"lookup-function-name", &arg))
option.set_function_name (arg);
else
if (is_define_declaration (line, line_end, lineno,
"class-name", &arg))
option.set_class_name (arg);
else
if (is_declaration (line, line_end, lineno, "7bit"))
option.set (SEVENBIT);
else
if (is_declaration (line, line_end, lineno, "compare-lengths"))
option.set (LENTABLE);
else
if (is_declaration (line, line_end, lineno, "compare-strncmp"))
option.set (COMP);
else
if (is_declaration (line, line_end, lineno, "readonly-tables"))
option.set (CONST);
else
if (is_declaration (line, line_end, lineno, "enum"))
option.set (ENUM);
else
if (is_declaration (line, line_end, lineno, "includes"))
option.set (INCLUDE);
else
if (is_declaration (line, line_end, lineno, "global-table"))
option.set (GLOBAL);
else
if (is_declaration (line, line_end, lineno, "pic"))
option.set (SHAREDLIB);
else
if (is_define_declaration (line, line_end, lineno,
"string-pool-name", &arg))
option.set_stringpool_name (arg);
else
if (is_declaration (line, line_end, lineno, "null-strings"))
option.set (NULLSTRINGS);
else
if (is_define_declaration (line, line_end, lineno,
"constants-prefix", &arg))
option.set_constants_prefix (arg);
else
if (is_define_declaration (line, line_end, lineno,
"word-array-name", &arg))
option.set_wordlist_name (arg);
else
if (is_define_declaration (line, line_end, lineno,
"length-table-name", &arg))
option.set_lengthtable_name (arg);
else
if (is_declaration_with_arg (line, line_end, lineno,
"switch", &arg))
{
option.set_total_switches (atoi (arg));
if (option.get_total_switches () <= 0)
{
fprintf (stderr, "%s:%u: number of switches %s"
" must be a positive number\n",
pretty_input_file_name (), lineno, arg);
exit (1);
}
}
else
if (is_declaration (line, line_end, lineno, "omit-struct-type"))
option.set (NOTYPE);
else
{
fprintf (stderr, "%s:%u: unrecognized %% directive\n",
pretty_input_file_name (), lineno);
exit (1);
}
}
}
else if (!(_verbatim_declarations != NULL
&& _verbatim_declarations_end == NULL))
{
/* Append the line to struct_decl. */
size_t old_len = (struct_decl ? strlen (struct_decl) : 0);
size_t line_len = line_end - line;
size_t new_len = old_len + line_len + 1;
char *new_struct_decl = new char[new_len];
if (old_len > 0)
memcpy (new_struct_decl, struct_decl, old_len);
memcpy (new_struct_decl + old_len, line, line_len);
new_struct_decl[old_len + line_len] = '\0';
if (struct_decl)
delete[] struct_decl;
struct_decl = new_struct_decl;
/* Append the lineno to struct_decl_linenos. */
unsigned int *new_struct_decl_linenos =
new unsigned int[struct_decl_linecount + 1];
if (struct_decl_linecount > 0)
memcpy (new_struct_decl_linenos, struct_decl_linenos,
struct_decl_linecount * sizeof (unsigned int));
new_struct_decl_linenos[struct_decl_linecount] = lineno;
if (struct_decl_linenos)
delete[] struct_decl_linenos;
struct_decl_linenos = new_struct_decl_linenos;
/* Increment struct_decl_linecount. */
struct_decl_linecount++;
}
lineno++;
line = line_end;
}
if (_verbatim_declarations != NULL && _verbatim_declarations_end == NULL)
{
fprintf (stderr, "%s:%u: unterminated %%{ section\n",
pretty_input_file_name (), _verbatim_declarations_lineno);
exit (1);
}
/* Determine _struct_decl, _return_type, _struct_tag. */
if (option[TYPE])
{
if (struct_decl)
{
/* Drop leading whitespace and comments. */
{
char *p = struct_decl;
unsigned int *l = struct_decl_linenos;
for (;;)
{
if (p[0] == ' ' || p[0] == '\t')
{
p++;
continue;
}
if (p[0] == '\n')
{
l++;
p++;
continue;
}
if (p[0] == '/')
{
if (p[1] == '*')
{
/* Skip over ANSI C style comment. */
p += 2;
while (p[0] != '\0')
{
if (p[0] == '*' && p[1] == '/')
{
p += 2;
break;
}
if (p[0] == '\n')
l++;
p++;
}
continue;
}
if (p[1] == '/')
{
/* Skip over ISO C99 or C++ style comment. */
p += 2;
while (p[0] != '\0' && p[0] != '\n')
p++;
if (p[0] == '\n')
{
l++;
p++;
}
continue;
}
}
break;
}
if (p != struct_decl)
{
size_t len = strlen (p);
char *new_struct_decl = new char[len + 1];
memcpy (new_struct_decl, p, len + 1);
delete[] struct_decl;
struct_decl = new_struct_decl;
}
_struct_decl_lineno = *l;
}
/* Drop trailing whitespace. */
for (char *p = struct_decl + strlen (struct_decl); p > struct_decl;)
if (p[-1] == '\n' || p[-1] == ' ' || p[-1] == '\t')
*--p = '\0';
else
break;
}
if (struct_decl == NULL || struct_decl[0] == '\0')
{
fprintf (stderr, "%s: missing struct declaration"
" for option --struct-type\n",
pretty_input_file_name ());
exit (1);
}
{
/* Ensure trailing semicolon. */
size_t old_len = strlen (struct_decl);
if (struct_decl[old_len - 1] != ';')
{
char *new_struct_decl = new char[old_len + 2];
memcpy (new_struct_decl, struct_decl, old_len);
new_struct_decl[old_len] = ';';
new_struct_decl[old_len + 1] = '\0';
delete[] struct_decl;
struct_decl = new_struct_decl;
}
}
/* Set _struct_decl to the entire declaration. */
_struct_decl = struct_decl;
/* Set _struct_tag to the naked "struct something". */
const char *p;
for (p = struct_decl; *p && *p != '{' && *p != ';' && *p != '\n'; p++)
;
for (; p > struct_decl;)
if (p[-1] == '\n' || p[-1] == ' ' || p[-1] == '\t')
--p;
else
break;
size_t struct_tag_length = p - struct_decl;
char *struct_tag = new char[struct_tag_length + 1];
memcpy (struct_tag, struct_decl, struct_tag_length);
struct_tag[struct_tag_length] = '\0';
_struct_tag = struct_tag;
/* The return type of the lookup function is "struct something *".
No "const" here, because if !option[CONST], some user code might
want to modify the structure. */
char *return_type = new char[struct_tag_length + 3];
memcpy (return_type, struct_decl, struct_tag_length);
return_type[struct_tag_length] = ' ';
return_type[struct_tag_length + 1] = '*';
return_type[struct_tag_length + 2] = '\0';
_return_type = return_type;
}
if (struct_decl_linenos)
delete[] struct_decl_linenos;
}
/* Parse the keywords section. */
{
Keyword_List<KT> **list_tail = &_head;
const char *delimiters = option.get_delimiters ();
unsigned int lineno = keywords_lineno;
bool charset_dependent = false;
for (const char *line = keywords; line < keywords_end; )
{
const char *line_end;
line_end = (const char *) memchr (line, '\n', keywords_end - line);
if (line_end != NULL)
line_end++;
else
line_end = keywords_end;
if (line[0] == '#')
; /* Comment line. */
else if (line[0] == '%')
{
fprintf (stderr, "%s:%u:"
" declarations are not allowed in the keywords section.\n"
"To declare a keyword starting with %%, enclose it in"
" double-quotes.\n",
pretty_input_file_name (), lineno);
exit (1);
}
else
{
/* An input line carrying a keyword. */
const char *keyword;
size_t keyword_length;
const char *rest;
if (line[0] == '"')
{
/* Parse a string in ANSI C syntax. */
char *kp = new char[line_end-line];
keyword = kp;
const char *lp = line + 1;
for (;;)
{
if (lp == line_end)
{
fprintf (stderr, "%s:%u: unterminated string\n",
pretty_input_file_name (), lineno);
exit (1);
}
char c = *lp;
if (c == '\\')
{
c = *++lp;
switch (c)
{
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
{
int code = 0;
int count = 0;
while (count < 3 && *lp >= '0' && *lp <= '7')
{
code = (code << 3) + (*lp - '0');
lp++;
count++;
}
if (code > UCHAR_MAX)
fprintf (stderr,
"%s:%u: octal escape out of range\n",
pretty_input_file_name (), lineno);
*kp = static_cast<char>(code);
break;
}
case 'x':
{
int code = 0;
int count = 0;
lp++;
while ((*lp >= '0' && *lp <= '9')
|| (*lp >= 'A' && *lp <= 'F')
|| (*lp >= 'a' && *lp <= 'f'))
{
code = (code << 4)
+ (*lp >= 'A' && *lp <= 'F'
? *lp - 'A' + 10 :
*lp >= 'a' && *lp <= 'f'
? *lp - 'a' + 10 :
*lp - '0');
lp++;
count++;
}
if (count == 0)
fprintf (stderr, "%s:%u: hexadecimal escape"
" without any hex digits\n",
pretty_input_file_name (), lineno);
if (code > UCHAR_MAX)
fprintf (stderr, "%s:%u: hexadecimal escape"
" out of range\n",
pretty_input_file_name (), lineno);
*kp = static_cast<char>(code);
break;
}
case '\\': case '\'': case '"':
*kp = c;
lp++;
charset_dependent = true;
break;
case 'n':
*kp = '\n';
lp++;
charset_dependent = true;
break;
case 't':
*kp = '\t';
lp++;
charset_dependent = true;
break;
case 'r':
*kp = '\r';
lp++;
charset_dependent = true;
break;
case 'f':
*kp = '\f';
lp++;
charset_dependent = true;
break;
case 'b':
*kp = '\b';
lp++;
charset_dependent = true;
break;
case 'a':
*kp = '\a';
lp++;
charset_dependent = true;
break;
case 'v':
*kp = '\v';
lp++;
charset_dependent = true;
break;
default:
fprintf (stderr, "%s:%u: invalid escape sequence"
" in string\n",
pretty_input_file_name (), lineno);
exit (1);
}
}
else if (c == '"')
break;
else
{
*kp = c;
lp++;
charset_dependent = true;
}
kp++;
}
lp++;
if (lp < line_end && *lp != '\n')
{
if (strchr (delimiters, *lp) == NULL)
{
fprintf (stderr, "%s:%u: string not followed"
" by delimiter\n",
pretty_input_file_name (), lineno);
exit (1);
}
lp++;
}
keyword_length = kp - keyword;
if (option[TYPE])
{
char *line_rest = new char[line_end - lp + 1];
memcpy (line_rest, lp, line_end - lp);
line_rest[line_end - lp -
(line_end > lp && line_end[-1] == '\n' ? 1 : 0)]
= '\0';
rest = line_rest;
}
else
rest = empty_string;
}
else
{
/* Not a string. Look for the delimiter. */
const char *lp = line;
for (;;)
{
if (!(lp < line_end && *lp != '\n'))
{
keyword = line;
keyword_length = lp - line;
rest = empty_string;
break;
}
if (strchr (delimiters, *lp) != NULL)
{
keyword = line;
keyword_length = lp - line;
lp++;
if (option[TYPE])
{
char *line_rest = new char[line_end - lp + 1];
memcpy (line_rest, lp, line_end - lp);
line_rest[line_end - lp -
(line_end > lp && line_end[-1] == '\n'
? 1 : 0)]
= '\0';
rest = line_rest;
}
else
rest = empty_string;
break;
}
lp++;
}
if (keyword_length > 0)
charset_dependent = true;
}
/* Allocate Keyword and add it to the list. */
KT *new_kw = _factory->create_keyword (keyword, keyword_length,
rest, lineno);
*list_tail = new Keyword_List<KT> (new_kw);
list_tail = &(*list_tail)->rest();
}
lineno++;
line = line_end;
}
*list_tail = NULL;
if (_head == NULL)
{
fprintf (stderr, "%s: No keywords in input file!\n",
pretty_input_file_name ());
exit (1);
}
_charset_dependent = charset_dependent;
}
/* To be freed in the destructor. */
_input = input;
_input_end = input_end;
}
template <class KT>
Input<KT>::~Input ()
{
/* Free allocated memory. */
delete[] const_cast<char*>(_return_type);
delete[] const_cast<char*>(_struct_tag);
delete[] const_cast<char*>(_struct_decl);
delete[] _input;
}
/* ------------------------------------------------------------------------- */
/* Explicit template instantiations. Needed to avoid link-time errors.
C++ is just misdesigned: The most important aspect in building large
software packages is information hiding. (That's the point of having the
implementation of a .h file in a .cc file, isn't it? And of having
classes with private fields and methods, isn't it?) The fact that we
need the instantiation of the Input<KT> class only for KT = KeywordExt
comes from the code in main.cc. It is ugly that implementation details
of main.cc have an influence into this file here. */
template class Input<KeywordExt>;
/* ------------------------------------------------------------------------- */
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