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gimp/libgimpconfig/gimpscanner.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpscanner.c
* Copyright (C) 2002 Sven Neumann <sven@gimp.org>
* Michael Natterer <mitch@gimp.org>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#include <glib-object.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "config-types.h"
#include "gimpconfig-error.h"
#include "gimpscanner.h"
#include "gimp-intl.h"
typedef struct
{
gint fd;
gchar *name;
GError **error;
} GimpScannerData;
/* local function prototypes */
static GScanner * gimp_scanner_new (const gchar *name,
gint fd,
GError **error);
static void gimp_scanner_message (GScanner *scanner,
gchar *message,
gboolean is_error);
/* public functions */
GScanner *
gimp_scanner_new_file (const gchar *filename,
GError **error)
{
GScanner *scanner;
gint fd;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = open (filename, O_RDONLY);
if (fd == -1)
{
g_set_error (error,
GIMP_CONFIG_ERROR,
(errno == ENOENT ?
GIMP_CONFIG_ERROR_OPEN_ENOENT : GIMP_CONFIG_ERROR_OPEN),
_("Failed to open file: '%s': %s"),
filename, g_strerror (errno));
return NULL;
}
scanner = gimp_scanner_new (filename, fd, error);
g_scanner_input_file (scanner, fd);
return scanner;
}
GScanner *
gimp_scanner_new_string (const gchar *text,
gint text_len,
GError **error)
{
GScanner *scanner;
g_return_val_if_fail (text != NULL || text_len == 0, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (text_len < 0)
text_len = strlen (text);
scanner = gimp_scanner_new (NULL, -1, error);
g_scanner_input_text (scanner, text, text_len);
return scanner;
}
static GScanner *
gimp_scanner_new (const gchar *name,
gint fd,
GError **error)
{
GScanner *scanner;
GimpScannerData *data;
scanner = g_scanner_new (NULL);
data = g_new0 (GimpScannerData, 1);
data->name = g_strdup (name);
data->fd = fd;
data->error = error;
scanner->user_data = data;
scanner->msg_handler = gimp_scanner_message;
scanner->config->cset_identifier_first = ( G_CSET_a_2_z G_CSET_A_2_Z );
scanner->config->cset_identifier_nth = ( G_CSET_a_2_z G_CSET_A_2_Z
G_CSET_DIGITS "-_" );
scanner->config->scan_identifier_1char = TRUE;
return scanner;
}
void
gimp_scanner_destroy (GScanner *scanner)
{
GimpScannerData *data;
g_return_if_fail (scanner != NULL);
data = scanner->user_data;
if (data->fd > 0)
{
if (close (data->fd))
g_warning ("%s: could not close file descriptor: %s",
G_GNUC_PRETTY_FUNCTION, g_strerror (errno));
}
g_free (data->name);
g_free (data);
g_scanner_destroy (scanner);
}
gboolean
gimp_scanner_parse_token (GScanner *scanner,
GTokenType token)
{
if (g_scanner_peek_next_token (scanner) != token)
return FALSE;
g_scanner_get_next_token (scanner);
return TRUE;
}
gboolean
gimp_scanner_parse_identifier (GScanner *scanner,
const gchar *identifier)
{
if (g_scanner_peek_next_token (scanner) != G_TOKEN_IDENTIFIER)
return FALSE;
g_scanner_get_next_token (scanner);
if (strcmp (scanner->value.v_identifier, identifier))
return FALSE;
return TRUE;
}
gboolean
gimp_scanner_parse_string (GScanner *scanner,
gchar **dest)
{
if (g_scanner_peek_next_token (scanner) != G_TOKEN_STRING)
return FALSE;
g_scanner_get_next_token (scanner);
if (*scanner->value.v_string)
{
if (! g_utf8_validate (scanner->value.v_string, -1, NULL))
{
g_scanner_warn (scanner, _("invalid UTF-8 string"));
return FALSE;
}
*dest = g_strdup (scanner->value.v_string);
}
else
{
*dest = NULL;
}
return TRUE;
}
gboolean
gimp_scanner_parse_string_no_validate (GScanner *scanner,
gchar **dest)
{
if (g_scanner_peek_next_token (scanner) != G_TOKEN_STRING)
return FALSE;
g_scanner_get_next_token (scanner);
if (*scanner->value.v_string)
*dest = g_strdup (scanner->value.v_string);
else
*dest = NULL;
return TRUE;
}
gboolean
gimp_scanner_parse_int (GScanner *scanner,
gint *dest)
{
gboolean negate = FALSE;
if (g_scanner_peek_next_token (scanner) == '-')
{
negate = TRUE;
g_scanner_get_next_token (scanner);
}
if (g_scanner_peek_next_token (scanner) != G_TOKEN_INT)
return FALSE;
g_scanner_get_next_token (scanner);
if (negate)
*dest = -scanner->value.v_int;
else
*dest = scanner->value.v_int;
return TRUE;
}
gboolean
gimp_scanner_parse_float (GScanner *scanner,
gdouble *dest)
{
if (g_scanner_peek_next_token (scanner) != G_TOKEN_FLOAT)
return FALSE;
g_scanner_get_next_token (scanner);
*dest = scanner->value.v_float;
return TRUE;
}
enum
{
COLOR_RGB = 1,
COLOR_RGBA,
COLOR_HSV,
COLOR_HSVA
};
gboolean
gimp_scanner_parse_color (GScanner *scanner,
GimpRGB *dest)
{
guint scope_id;
guint old_scope_id;
GTokenType token;
GimpRGB color;
scope_id = g_quark_from_static_string ("gimp_scanner_parse_color");
old_scope_id = g_scanner_set_scope (scanner, scope_id);
if (! g_scanner_scope_lookup_symbol (scanner, scope_id, "color-rgb"))
{
g_scanner_scope_add_symbol (scanner, scope_id,
"color-rgb", GINT_TO_POINTER (COLOR_RGB));
g_scanner_scope_add_symbol (scanner, scope_id,
"color-rgba", GINT_TO_POINTER (COLOR_RGBA));
g_scanner_scope_add_symbol (scanner, scope_id,
"color-hsv", GINT_TO_POINTER (COLOR_HSV));
g_scanner_scope_add_symbol (scanner, scope_id,
"color-hsva", GINT_TO_POINTER (COLOR_HSVA));
}
token = G_TOKEN_LEFT_PAREN;
while (g_scanner_peek_next_token (scanner) == token)
{
token = g_scanner_get_next_token (scanner);
switch (token)
{
case G_TOKEN_LEFT_PAREN:
token = G_TOKEN_SYMBOL;
break;
case G_TOKEN_SYMBOL:
{
gdouble col[4] = { 0.0, 0.0, 0.0, 1.0 };
gint n_channels = 4;
gboolean is_hsv = FALSE;
gint i;
switch (GPOINTER_TO_INT (scanner->value.v_symbol))
{
case COLOR_RGB:
n_channels = 3;
/* fallthrough */
case COLOR_RGBA:
break;
case COLOR_HSV:
n_channels = 3;
/* fallthrough */
case COLOR_HSVA:
is_hsv = TRUE;
break;
}
token = G_TOKEN_FLOAT;
for (i = 0; i < n_channels; i++)
{
if (! gimp_scanner_parse_float (scanner, &col[i]))
goto finish;
}
if (is_hsv)
{
GimpHSV hsv;
gimp_hsva_set (&hsv, col[0], col[1], col[2], col[3]);
gimp_hsv_clamp (&hsv);
gimp_hsv_to_rgb (&hsv, &color);
}
else
{
gimp_rgba_set (&color, col[0], col[1], col[2], col[3]);
gimp_rgb_clamp (&color);
}
token = G_TOKEN_RIGHT_PAREN;
}
break;
case G_TOKEN_RIGHT_PAREN:
token = G_TOKEN_NONE; /* indicates success */
goto finish;
default: /* do nothing */
break;
}
}
finish:
if (token != G_TOKEN_NONE)
{
g_scanner_get_next_token (scanner);
g_scanner_unexp_token (scanner, token, NULL, NULL, NULL,
_("fatal parse error"), TRUE);
}
else
{
*dest = color;
}
g_scanner_set_scope (scanner, old_scope_id);
return (token == G_TOKEN_NONE);
}
gboolean
gimp_scanner_parse_matrix2 (GScanner *scanner,
GimpMatrix2 *dest)
{
guint scope_id;
guint old_scope_id;
GTokenType token;
GimpMatrix2 matrix;
scope_id = g_quark_from_static_string ("gimp_scanner_parse_matrix");
old_scope_id = g_scanner_set_scope (scanner, scope_id);
if (! g_scanner_scope_lookup_symbol (scanner, scope_id, "matrix"))
g_scanner_scope_add_symbol (scanner, scope_id, "matrix", 0);
token = G_TOKEN_LEFT_PAREN;
while (g_scanner_peek_next_token (scanner) == token)
{
token = g_scanner_get_next_token (scanner);
switch (token)
{
case G_TOKEN_LEFT_PAREN:
token = G_TOKEN_SYMBOL;
break;
case G_TOKEN_SYMBOL:
{
token = G_TOKEN_FLOAT;
if (! gimp_scanner_parse_float (scanner, &matrix.coeff[0][0]))
goto finish;
if (! gimp_scanner_parse_float (scanner, &matrix.coeff[0][1]))
goto finish;
if (! gimp_scanner_parse_float (scanner, &matrix.coeff[1][0]))
goto finish;
if (! gimp_scanner_parse_float (scanner, &matrix.coeff[1][1]))
goto finish;
token = G_TOKEN_RIGHT_PAREN;
}
break;
case G_TOKEN_RIGHT_PAREN:
token = G_TOKEN_NONE; /* indicates success */
goto finish;
default: /* do nothing */
break;
}
}
finish:
if (token != G_TOKEN_NONE)
{
g_scanner_get_next_token (scanner);
g_scanner_unexp_token (scanner, token, NULL, NULL, NULL,
_("fatal parse error"), TRUE);
}
else
{
*dest = matrix;
}
g_scanner_set_scope (scanner, old_scope_id);
return (token == G_TOKEN_NONE);
}
/* private functions */
static void
gimp_scanner_message (GScanner *scanner,
gchar *message,
gboolean is_error)
{
GimpScannerData *data = scanner->user_data;
/* we don't expect warnings */
g_return_if_fail (is_error);
if (data->name)
g_set_error (data->error,
GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("Error while parsing '%s' in line %d:\n%s"),
data->name, scanner->line, message);
else
/* should never happen, thus not marked for translation */
g_set_error (data->error,
GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
"Error parsing internal buffer: %s", message);
}
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