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/* xgettext glade backend.
Copyright (C) 2002-2003, 2005-2008 Free Software Foundation, Inc.
This file was written by Bruno Haible <haible@clisp.cons.org>, 2002.
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/>. */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* Specification. */
#include "x-glade.h"
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if DYNLOAD_LIBEXPAT
# include <dlfcn.h>
#else
# if HAVE_LIBEXPAT
# include <expat.h>
# endif
#endif
#include "message.h"
#include "xgettext.h"
#include "error.h"
#include "xerror.h"
#include "xvasprintf.h"
#include "basename.h"
#include "progname.h"
#include "xalloc.h"
#include "hash.h"
#include "po-charset.h"
#include "gettext.h"
#define _(s) gettext(s)
/* glade is an XML based format. Some example files are contained in
libglade-0.16. */
/* ====================== Keyword set customization. ====================== */
/* If true extract all strings. */
static bool extract_all = false;
static hash_table keywords;
static bool default_keywords = true;
void
x_glade_extract_all ()
{
extract_all = true;
}
void
x_glade_keyword (const char *name)
{
if (name == NULL)
default_keywords = false;
else
{
if (keywords.table == NULL)
hash_init (&keywords, 100);
hash_insert_entry (&keywords, name, strlen (name), NULL);
}
}
/* Finish initializing the keywords hash table.
Called after argument processing, before each file is processed. */
static void
init_keywords ()
{
if (default_keywords)
{
/* When adding new keywords here, also update the documentation in
xgettext.texi! */
x_glade_keyword ("label");
x_glade_keyword ("title");
x_glade_keyword ("text");
x_glade_keyword ("format");
x_glade_keyword ("copyright");
x_glade_keyword ("comments");
x_glade_keyword ("preview_text");
x_glade_keyword ("tooltip");
default_keywords = false;
}
}
/* ======================= Different libexpat ABIs. ======================= */
/* There are three different ABIs of libexpat, regarding the functions
XML_GetCurrentLineNumber and XML_GetCurrentColumnNumber.
In expat < 2.0, they return an 'int'.
In expat >= 2.0, they return
- a 'long' if expat was compiled with the default flags, or
- a 'long long' if expat was compiled with -DXML_LARGE_SIZE.
But the <expat.h> include file does not contain the information whether
expat was compiled with -DXML_LARGE_SIZE; so the include file is lying!
For this information, we need to call XML_GetFeatureList(), for
expat >= 2.0.1; for expat = 2.0.0, we have to assume the default flags. */
#if !DYNLOAD_LIBEXPAT
# if XML_MAJOR_VERSION >= 2
/* expat >= 2.0 -> Return type is 'int64_t' worst-case. */
/* Put the function pointers into variables, because some GCC 4 versions
generate an abort when we convert symbol address to different function
pointer types. */
static void *p_XML_GetCurrentLineNumber = (void *) &XML_GetCurrentLineNumber;
static void *p_XML_GetCurrentColumnNumber = (void *) &XML_GetCurrentColumnNumber;
/* Return true if libexpat was compiled with -DXML_LARGE_SIZE. */
static bool
is_XML_LARGE_SIZE_ABI (void)
{
static bool tested;
static bool is_large;
if (!tested)
{
const XML_Feature *features;
is_large = false;
for (features = XML_GetFeatureList (); features->name != NULL; features++)
if (strcmp (features->name, "XML_LARGE_SIZE") == 0)
{
is_large = true;
break;
}
tested = true;
}
return is_large;
}
static int64_t
GetCurrentLineNumber (XML_Parser parser)
{
if (is_XML_LARGE_SIZE_ABI ())
return ((int64_t (*) (XML_Parser)) p_XML_GetCurrentLineNumber) (parser);
else
return ((long (*) (XML_Parser)) p_XML_GetCurrentLineNumber) (parser);
}
# define XML_GetCurrentLineNumber GetCurrentLineNumber
static int64_t
GetCurrentColumnNumber (XML_Parser parser)
{
if (is_XML_LARGE_SIZE_ABI ())
return ((int64_t (*) (XML_Parser)) p_XML_GetCurrentColumnNumber) (parser);
else
return ((long (*) (XML_Parser)) p_XML_GetCurrentColumnNumber) (parser);
}
# define XML_GetCurrentColumnNumber GetCurrentColumnNumber
# else
/* expat < 2.0 -> Return type is 'int'. */
# endif
#endif
/* ===================== Dynamic loading of libexpat. ===================== */
#if DYNLOAD_LIBEXPAT
typedef struct
{
int major;
int minor;
int micro;
}
XML_Expat_Version;
enum XML_FeatureEnum { XML_FEATURE_END = 0 };
typedef struct
{
enum XML_FeatureEnum feature;
const char *name;
long int value;
}
XML_Feature;
typedef void *XML_Parser;
typedef char XML_Char;
typedef char XML_LChar;
enum XML_Error { XML_ERROR_NONE };
typedef void (*XML_StartElementHandler) (void *userData, const XML_Char *name, const XML_Char **atts);
typedef void (*XML_EndElementHandler) (void *userData, const XML_Char *name);
typedef void (*XML_CharacterDataHandler) (void *userData, const XML_Char *s, int len);
typedef void (*XML_CommentHandler) (void *userData, const XML_Char *data);
static XML_Expat_Version (*p_XML_ExpatVersionInfo) (void);
static const XML_Feature * (*p_XML_GetFeatureList) (void);
static XML_Parser (*p_XML_ParserCreate) (const XML_Char *encoding);
static void (*p_XML_SetElementHandler) (XML_Parser parser, XML_StartElementHandler start, XML_EndElementHandler end);
static void (*p_XML_SetCharacterDataHandler) (XML_Parser parser, XML_CharacterDataHandler handler);
static void (*p_XML_SetCommentHandler) (XML_Parser parser, XML_CommentHandler handler);
static int (*p_XML_Parse) (XML_Parser parser, const char *s, int len, int isFinal);
static enum XML_Error (*p_XML_GetErrorCode) (XML_Parser parser);
static void *p_XML_GetCurrentLineNumber;
static void *p_XML_GetCurrentColumnNumber;
static void (*p_XML_ParserFree) (XML_Parser parser);
static const XML_LChar * (*p_XML_ErrorString) (int code);
#define XML_ExpatVersionInfo (*p_XML_ExpatVersionInfo)
#define XML_GetFeatureList (*p_XML_GetFeatureList)
enum XML_Size_ABI { is_int, is_long, is_int64_t };
static enum XML_Size_ABI
get_XML_Size_ABI (void)
{
static bool tested;
static enum XML_Size_ABI abi;
if (!tested)
{
if (XML_ExpatVersionInfo () .major >= 2)
/* expat >= 2.0 -> XML_Size is 'int64_t' or 'long'. */
{
const XML_Feature *features;
abi = is_long;
for (features = XML_GetFeatureList ();
features->name != NULL;
features++)
if (strcmp (features->name, "XML_LARGE_SIZE") == 0)
{
abi = is_int64_t;
break;
}
}
else
/* expat < 2.0 -> XML_Size is 'int'. */
abi = is_int;
tested = true;
}
return abi;
}
#define XML_ParserCreate (*p_XML_ParserCreate)
#define XML_SetElementHandler (*p_XML_SetElementHandler)
#define XML_SetCharacterDataHandler (*p_XML_SetCharacterDataHandler)
#define XML_SetCommentHandler (*p_XML_SetCommentHandler)
#define XML_Parse (*p_XML_Parse)
#define XML_GetErrorCode (*p_XML_GetErrorCode)
static int64_t
XML_GetCurrentLineNumber (XML_Parser parser)
{
switch (get_XML_Size_ABI ())
{
case is_int:
return ((int (*) (XML_Parser)) p_XML_GetCurrentLineNumber) (parser);
case is_long:
return ((long (*) (XML_Parser)) p_XML_GetCurrentLineNumber) (parser);
case is_int64_t:
return ((int64_t (*) (XML_Parser)) p_XML_GetCurrentLineNumber) (parser);
default:
abort ();
}
}
static int64_t
XML_GetCurrentColumnNumber (XML_Parser parser)
{
switch (get_XML_Size_ABI ())
{
case is_int:
return ((int (*) (XML_Parser)) p_XML_GetCurrentColumnNumber) (parser);
case is_long:
return ((long (*) (XML_Parser)) p_XML_GetCurrentColumnNumber) (parser);
case is_int64_t:
return ((int64_t (*) (XML_Parser)) p_XML_GetCurrentColumnNumber) (parser);
default:
abort ();
}
}
#define XML_ParserFree (*p_XML_ParserFree)
#define XML_ErrorString (*p_XML_ErrorString)
static int libexpat_loaded = 0;
static bool
load_libexpat ()
{
if (libexpat_loaded == 0)
{
void *handle;
/* Try to load libexpat-2.x. */
handle = dlopen ("libexpat.so.1", RTLD_LAZY);
if (handle == NULL)
/* Try to load libexpat-1.x. */
handle = dlopen ("libexpat.so.0", RTLD_LAZY);
if (handle != NULL
&& (p_XML_ExpatVersionInfo =
(XML_Expat_Version (*) (void))
dlsym (handle, "XML_ExpatVersionInfo")) != NULL
&& (p_XML_GetFeatureList =
(const XML_Feature * (*) (void))
dlsym (handle, "XML_GetFeatureList")) != NULL
&& (p_XML_ParserCreate =
(XML_Parser (*) (const XML_Char *))
dlsym (handle, "XML_ParserCreate")) != NULL
&& (p_XML_SetElementHandler =
(void (*) (XML_Parser, XML_StartElementHandler, XML_EndElementHandler))
dlsym (handle, "XML_SetElementHandler")) != NULL
&& (p_XML_SetCharacterDataHandler =
(void (*) (XML_Parser, XML_CharacterDataHandler))
dlsym (handle, "XML_SetCharacterDataHandler")) != NULL
&& (p_XML_SetCommentHandler =
(void (*) (XML_Parser, XML_CommentHandler))
dlsym (handle, "XML_SetCommentHandler")) != NULL
&& (p_XML_Parse =
(int (*) (XML_Parser, const char *, int, int))
dlsym (handle, "XML_Parse")) != NULL
&& (p_XML_GetErrorCode =
(enum XML_Error (*) (XML_Parser))
dlsym (handle, "XML_GetErrorCode")) != NULL
&& (p_XML_GetCurrentLineNumber =
dlsym (handle, "XML_GetCurrentLineNumber")) != NULL
&& (p_XML_GetCurrentColumnNumber =
dlsym (handle, "XML_GetCurrentColumnNumber")) != NULL
&& (p_XML_ParserFree =
(void (*) (XML_Parser))
dlsym (handle, "XML_ParserFree")) != NULL
&& (p_XML_ErrorString =
(const XML_LChar * (*) (int))
dlsym (handle, "XML_ErrorString")) != NULL)
libexpat_loaded = 1;
else
libexpat_loaded = -1;
}
return libexpat_loaded >= 0;
}
#define LIBEXPAT_AVAILABLE() (load_libexpat ())
#elif HAVE_LIBEXPAT
#define LIBEXPAT_AVAILABLE() true
#endif
/* ============================= XML parsing. ============================= */
#if DYNLOAD_LIBEXPAT || HAVE_LIBEXPAT
/* Accumulator for the extracted messages. */
static message_list_ty *mlp;
/* Logical filename, used to label the extracted messages. */
static char *logical_file_name;
/* XML parser. */
static XML_Parser parser;
struct element_state
{
bool extract_string;
int lineno;
char *buffer;
size_t bufmax;
size_t buflen;
};
static struct element_state *stack;
static size_t stack_size;
/* Ensures stack_size >= size. */
static void
ensure_stack_size (size_t size)
{
if (size > stack_size)
{
stack_size = 2 * stack_size;
if (stack_size < size)
stack_size = size;
stack =
(struct element_state *)
xrealloc (stack, stack_size * sizeof (struct element_state));
}
}
static size_t stack_depth;
/* Callback called when <element> is seen. */
static void
start_element_handler (void *userData, const char *name,
const char **attributes)
{
struct element_state *p;
void *hash_result;
/* Increase stack depth. */
stack_depth++;
ensure_stack_size (stack_depth + 1);
/* Don't extract a string for the containing element. */
stack[stack_depth - 1].extract_string = false;
p = &stack[stack_depth];
p->extract_string = extract_all;
/* In Glade 1, a few specific elements are translatable. */
if (!p->extract_string)
p->extract_string =
(hash_find_entry (&keywords, name, strlen (name), &hash_result) == 0);
/* In Glade 2, all <property> and <atkproperty> elements are translatable
that have the attribute translatable="yes". */
if (!p->extract_string
&& (strcmp (name, "property") == 0 || strcmp (name, "atkproperty") == 0))
{
bool has_translatable = false;
const char **attp = attributes;
while (*attp != NULL)
{
if (strcmp (attp[0], "translatable") == 0)
{
has_translatable = (strcmp (attp[1], "yes") == 0);
break;
}
attp += 2;
}
p->extract_string = has_translatable;
}
if (!p->extract_string
&& strcmp (name, "atkaction") == 0)
{
const char **attp = attributes;
while (*attp != NULL)
{
if (strcmp (attp[0], "description") == 0)
{
if (strcmp (attp[1], "") != 0)
{
lex_pos_ty pos;
pos.file_name = logical_file_name;
pos.line_number = XML_GetCurrentLineNumber (parser);
remember_a_message (mlp, NULL, xstrdup (attp[1]),
null_context, &pos, savable_comment);
}
break;
}
attp += 2;
}
}
p->lineno = XML_GetCurrentLineNumber (parser);
p->buffer = NULL;
p->bufmax = 0;
p->buflen = 0;
if (!p->extract_string)
savable_comment_reset ();
}
/* Callback called when </element> is seen. */
static void
end_element_handler (void *userData, const char *name)
{
struct element_state *p = &stack[stack_depth];
/* Actually extract string. */
if (p->extract_string)
{
/* Don't extract the empty string. */
if (p->buflen > 0)
{
lex_pos_ty pos;
if (p->buflen == p->bufmax)
p->buffer = (char *) xrealloc (p->buffer, p->buflen + 1);
p->buffer[p->buflen] = '\0';
pos.file_name = logical_file_name;
pos.line_number = p->lineno;
remember_a_message (mlp, NULL, p->buffer, null_context, &pos,
savable_comment);
p->buffer = NULL;
}
}
/* Free memory for this stack level. */
if (p->buffer != NULL)
free (p->buffer);
/* Decrease stack depth. */
stack_depth--;
savable_comment_reset ();
}
/* Callback called when some text is seen. */
static void
character_data_handler (void *userData, const char *s, int len)
{
struct element_state *p = &stack[stack_depth];
/* Accumulate character data. */
if (len > 0)
{
if (p->buflen + len > p->bufmax)
{
p->bufmax = 2 * p->bufmax;
if (p->bufmax < p->buflen + len)
p->bufmax = p->buflen + len;
p->buffer = (char *) xrealloc (p->buffer, p->bufmax);
}
memcpy (p->buffer + p->buflen, s, len);
p->buflen += len;
}
}
/* Callback called when some comment text is seen. */
static void
comment_handler (void *userData, const char *data)
{
/* Split multiline comment into lines, and remove leading and trailing
whitespace. */
char *copy = xstrdup (data);
char *p = copy;
char *q;
for (p = copy; (q = strchr (p, '\n')) != NULL; p = q + 1)
{
while (p[0] == ' ' || p[0] == '\t')
p++;
while (q > p && (q[-1] == ' ' || q[-1] == '\t'))
q--;
*q = '\0';
savable_comment_add (p);
}
q = p + strlen (p);
while (p[0] == ' ' || p[0] == '\t')
p++;
while (q > p && (q[-1] == ' ' || q[-1] == '\t'))
q--;
*q = '\0';
savable_comment_add (p);
free (copy);
}
static void
do_extract_glade (FILE *fp,
const char *real_filename, const char *logical_filename,
msgdomain_list_ty *mdlp)
{
mlp = mdlp->item[0]->messages;
/* expat feeds us strings in UTF-8 encoding. */
xgettext_current_source_encoding = po_charset_utf8;
logical_file_name = xstrdup (logical_filename);
init_keywords ();
parser = XML_ParserCreate (NULL);
if (parser == NULL)
error (EXIT_FAILURE, 0, _("memory exhausted"));
XML_SetElementHandler (parser, start_element_handler, end_element_handler);
XML_SetCharacterDataHandler (parser, character_data_handler);
XML_SetCommentHandler (parser, comment_handler);
stack_depth = 0;
while (!feof (fp))
{
char buf[4096];
int count = fread (buf, 1, sizeof buf, fp);
if (count == 0)
{
if (ferror (fp))
error (EXIT_FAILURE, errno, _("\
error while reading \"%s\""), real_filename);
/* EOF reached. */
break;
}
if (XML_Parse (parser, buf, count, 0) == 0)
error (EXIT_FAILURE, 0, _("%s:%lu:%lu: %s"), logical_filename,
(unsigned long) XML_GetCurrentLineNumber (parser),
(unsigned long) XML_GetCurrentColumnNumber (parser) + 1,
XML_ErrorString (XML_GetErrorCode (parser)));
}
if (XML_Parse (parser, NULL, 0, 1) == 0)
error (EXIT_FAILURE, 0, _("%s:%lu:%lu: %s"), logical_filename,
(unsigned long) XML_GetCurrentLineNumber (parser),
(unsigned long) XML_GetCurrentColumnNumber (parser) + 1,
XML_ErrorString (XML_GetErrorCode (parser)));
XML_ParserFree (parser);
/* Close scanner. */
logical_file_name = NULL;
parser = NULL;
}
#endif
void
extract_glade (FILE *fp,
const char *real_filename, const char *logical_filename,
flag_context_list_table_ty *flag_table,
msgdomain_list_ty *mdlp)
{
#if DYNLOAD_LIBEXPAT || HAVE_LIBEXPAT
if (LIBEXPAT_AVAILABLE ())
do_extract_glade (fp, real_filename, logical_filename, mdlp);
else
#endif
{
multiline_error (xstrdup (""),
xasprintf (_("\
Language \"glade\" is not supported. %s relies on expat.\n\
This version was built without expat.\n"),
basename (program_name)));
exit (EXIT_FAILURE);
}
}
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