diff options
Diffstat (limited to 'src/preferences.c')
| -rw-r--r-- | src/preferences.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/preferences.c b/src/preferences.c new file mode 100644 index 0000000..16c3839 --- /dev/null +++ b/src/preferences.c @@ -0,0 +1,185 @@ +/* sane - Scanner Access Now Easy. + Copyright (C) 1997 David Mosberger-Tang + This file is part of the SANE package. + + SANE 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. + + SANE 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 sane; see the file COPYING. If not, write to the Free + Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "../include/sane/config.h" + +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <preferences.h> +#include <sane/sane.h> +#include "../include/sane/sanei.h" +#include "../include/sane/sanei_wire.h" +#include "../include/sane/sanei_codec_ascii.h" + +#define POFFSET(field) ((char *) &((Preferences *) 0)->field - (char *) 0) +#define PFIELD(p,offset,type) (*((type *)(((char *)(p)) + (offset)))) + +Preferences preferences = + { + 0, /* no preferred device (must be 0 or malloced!) */ + 0, /* no default filename */ + 0, /* advanced user */ + 1, /* tooltips enabled */ + 1, /* two column enabled */ + 10.0, /* length unit */ + 1, /* preserve_preview */ + 0, /* preview_own_cmap */ + 1.0 /* preview_gamma */ + }; + +static void w_string (Wire *w, Preferences *p, long offset); +static void w_double (Wire *w, Preferences *p, long offset); +static void w_int (Wire *w, Preferences *p, long offset); + +static struct + { + SANE_String name; + void (*codec) (Wire *w, Preferences *p, long offset); + long offset; + } +desc[] = + { + {"device", w_string, POFFSET(device)}, + {"filename", w_string, POFFSET(filename)}, + {"advanced", w_int, POFFSET(advanced)}, + {"tool-tips", w_int, POFFSET(tooltips_enabled)}, + {"twocolumn", w_int, POFFSET(twocolumn_enabled)}, + {"length-unit", w_double, POFFSET(length_unit)}, + {"preserve-preview", w_int, POFFSET(preserve_preview)}, + {"preview-own-cmap", w_int, POFFSET(preview_own_cmap)}, + {"preview-gamma", w_double, POFFSET(preview_gamma)}, + }; + +static void +w_string (Wire *w, Preferences *p, long offset) +{ + SANE_String string; + + if (w->direction == WIRE_ENCODE) + string = PFIELD (p, offset, char *); + + sanei_w_string (w, &string); + + if (w->direction == WIRE_DECODE) + { + if (w->status == 0) + { + const char **field; + + field = &PFIELD (p, offset, const char *); + if (*field) + free ((char *) *field); + *field = string ? strdup (string) : 0; + } + sanei_w_free (w, (WireCodecFunc) sanei_w_string, &string); + } +} + +static void +w_double (Wire *w, Preferences *p, long offset) +{ + SANE_Word word; + + if (w->direction == WIRE_ENCODE) + word = SANE_FIX (PFIELD (p, offset, double)); + + sanei_w_word (w, &word); + + if (w->direction == WIRE_DECODE) + { + if (w->status == 0) + PFIELD (p, offset, double) = SANE_UNFIX (word); + sanei_w_free (w, (WireCodecFunc) sanei_w_word, &word); + } +} + +static void +w_int (Wire *w, Preferences *p, long offset) +{ + SANE_Word word; + + if (w->direction == WIRE_ENCODE) + word = PFIELD (p, offset, int); + + sanei_w_word (w, &word); + + if (w->direction == WIRE_DECODE) + { + if (w->status == 0) + PFIELD (p, offset, int) = word; + sanei_w_free (w, (WireCodecFunc) sanei_w_word, &word); + } +} + +void +preferences_save (int fd) +{ + Wire w; + int i; + + w.io.fd = fd; + w.io.read = read; + w.io.write = write; + sanei_w_init (&w, sanei_codec_ascii_init); + sanei_w_set_dir (&w, WIRE_ENCODE); + + for (i = 0; i < NELEMS (desc); ++i) + { + sanei_w_string (&w, &desc[i].name); + (*desc[i].codec) (&w, &preferences, desc[i].offset); + } + + sanei_w_set_dir (&w, WIRE_DECODE); /* flush it out */ +} + +void +preferences_restore (int fd) +{ + SANE_String name; + Wire w; + int i; + + w.io.fd = fd; + w.io.read = read; + w.io.write = write; + sanei_w_init (&w, sanei_codec_ascii_init); + sanei_w_set_dir (&w, WIRE_DECODE); + + while (1) + { + sanei_w_space (&w, 3); + if (w.status) + return; + + sanei_w_string (&w, &name); + if (w.status || !name) + return; + + for (i = 0; i < NELEMS (desc); ++i) + { + if (strcmp (name, desc[i].name) == 0) + { + (*desc[i].codec) (&w, &preferences, desc[i].offset); + break; + } + } + } +} |