dlls/sane.ds/options.c

   1 /*
   2  * Copyright 2009 Jeremy White <jwhite@codeweavers.com> for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdlib.h>
  22 #include "twain.h"
  23 #include "sane_i.h"
  24 #include "wine/debug.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  27
  28 #ifdef SONAME_LIBSANE
  29 static SANE_Status sane_find_option(SANE_Handle h, const char *option_name,
  30         const SANE_Option_Descriptor **opt_p, int *optno, SANE_Value_Type type)
  31 {
  32     SANE_Status rc;
  33     SANE_Int optcount;
  34     const SANE_Option_Descriptor *opt;
  35     int i;
  36
  37     /* Debian, in 32_net_backend_standard_fix.dpatch,
  38      *  forces a frontend (that's us) to reload options
  39      *  manually by invoking get_option_descriptor. */
  40     opt = psane_get_option_descriptor(h, 0);
  41     if (! opt)
  42         return SANE_STATUS_EOF;
  43
  44     rc = psane_control_option(h, 0, SANE_ACTION_GET_VALUE, &optcount, NULL);
  45     if (rc != SANE_STATUS_GOOD)
  46         return rc;
  47
  48     for (i = 1; i < optcount; i++)
  49     {
  50         opt = psane_get_option_descriptor(h, i);
  51         if (opt && (opt->name && strcmp(opt->name, option_name) == 0) &&
  52                opt->type == type)
  53         {
  54             *opt_p = opt;
  55             *optno = i;
  56             return SANE_STATUS_GOOD;
  57         }
  58     }
  59     return SANE_STATUS_EOF;
  60 }
  61
  62 SANE_Status sane_option_get_int(SANE_Handle h, const char *option_name, SANE_Int *val)
  63 {
  64     SANE_Status rc;
  65     int optno;
  66     const SANE_Option_Descriptor *opt;
  67
  68     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_INT);
  69     if (rc != SANE_STATUS_GOOD)
  70         return rc;
  71
  72     return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, val, NULL);
  73 }
  74
  75 SANE_Status sane_option_set_int(SANE_Handle h, const char *option_name, SANE_Int val, SANE_Int *status)
  76 {
  77     SANE_Status rc;
  78     int optno;
  79     const SANE_Option_Descriptor *opt;
  80
  81     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_INT);
  82     if (rc != SANE_STATUS_GOOD)
  83         return rc;
  84
  85     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) &val, status);
  86 }
  87
  88 SANE_Status sane_option_get_bool(SANE_Handle h, const char *option_name, SANE_Bool *val, SANE_Int *status)
  89 {
  90     SANE_Status rc;
  91     int optno;
  92     const SANE_Option_Descriptor *opt;
  93
  94     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_BOOL);
  95     if (rc != SANE_STATUS_GOOD)
  96         return rc;
  97
  98     return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, (void *) val, status);
  99 }
 100
 101 SANE_Status sane_option_set_bool(SANE_Handle h, const char *option_name, SANE_Bool val, SANE_Int *status)
 102 {
 103     SANE_Status rc;
 104     int optno;
 105     const SANE_Option_Descriptor *opt;
 106
 107     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_BOOL);
 108     if (rc != SANE_STATUS_GOOD)
 109         return rc;
 110
 111     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) &val, status);
 112 }
 113
 114 SANE_Status sane_option_set_fixed(SANE_Handle h, const char *option_name, SANE_Fixed val, SANE_Int *status)
 115 {
 116     SANE_Status rc;
 117     int optno;
 118     const SANE_Option_Descriptor *opt;
 119
 120     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_FIXED);
 121     if (rc != SANE_STATUS_GOOD)
 122         return rc;
 123
 124     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) &val, status);
 125 }
 126
 127 SANE_Status sane_option_get_str(SANE_Handle h, const char *option_name, SANE_String val, size_t len, SANE_Int *status)
 128 {
 129     SANE_Status rc;
 130     int optno;
 131     const SANE_Option_Descriptor *opt;
 132
 133     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_STRING);
 134     if (rc != SANE_STATUS_GOOD)
 135         return rc;
 136
 137     if (opt->size < len)
 138         return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, (void *) val, status);
 139     else
 140         return SANE_STATUS_NO_MEM;
 141 }
 142
 143 /* Important:  SANE has the side effect of of overwriting val with the returned value */
 144 SANE_Status sane_option_set_str(SANE_Handle h, const char *option_name, SANE_String val, SANE_Int *status)
 145 {
 146     SANE_Status rc;
 147     int optno;
 148     const SANE_Option_Descriptor *opt;
 149
 150     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_STRING);
 151     if (rc != SANE_STATUS_GOOD)
 152         return rc;
 153
 154     return psane_control_option(h, optno, SANE_ACTION_SET_VALUE, (void *) val, status);
 155 }
 156
 157 SANE_Status sane_option_probe_resolution(SANE_Handle h, const char *option_name, SANE_Int *minval, SANE_Int *maxval, SANE_Int *quant)
 158 {
 159     SANE_Status rc;
 160     int optno;
 161     const SANE_Option_Descriptor *opt;
 162
 163     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_INT);
 164     if (rc != SANE_STATUS_GOOD)
 165         return rc;
 166
 167     if (opt->constraint_type != SANE_CONSTRAINT_RANGE)
 168         return SANE_STATUS_UNSUPPORTED;
 169
 170     *minval = opt->constraint.range->min;
 171     *maxval = opt->constraint.range->max;
 172     *quant = opt->constraint.range->quant;
 173
 174     return rc;
 175 }
 176
 177 SANE_Status sane_option_probe_mode(SANE_Handle h, SANE_String_Const **choices, char *current, int current_size)
 178 {
 179     SANE_Status rc;
 180     int optno;
 181     const SANE_Option_Descriptor *opt;
 182     rc = sane_find_option(h, "mode", &opt, &optno, SANE_TYPE_STRING);
 183     if (rc != SANE_STATUS_GOOD)
 184         return rc;
 185
 186     if (choices && opt->constraint_type == SANE_CONSTRAINT_STRING_LIST)
 187         *choices = (SANE_String_Const *) opt->constraint.string_list;
 188
 189     if (opt->size < current_size)
 190         return psane_control_option(h, optno, SANE_ACTION_GET_VALUE, current, NULL);
 191     else
 192         return SANE_STATUS_NO_MEM;
 193
 194 }
 195
 196 SANE_Status sane_option_probe_scan_area(SANE_Handle h, const char *option_name, SANE_Fixed *val,
 197                                         SANE_Unit *unit, SANE_Fixed *min, SANE_Fixed *max, SANE_Fixed *quant)
 198 {
 199     SANE_Status rc;
 200     int optno;
 201     const SANE_Option_Descriptor *opt;
 202
 203     rc = sane_find_option(h, option_name, &opt, &optno, SANE_TYPE_FIXED);
 204     if (rc != SANE_STATUS_GOOD)
 205         return rc;
 206
 207     if (unit)
 208         *unit = opt->unit;
 209     if (min)
 210         *min = opt->constraint.range->min;
 211     if (max)
 212         *max = opt->constraint.range->max;
 213     if (quant)
 214         *quant = opt->constraint.range->quant;
 215
 216     if (val)
 217         rc = psane_control_option(h, optno, SANE_ACTION_GET_VALUE, val, NULL);
 218
 219     return rc;
 220 }
 221 #endif