config.c

00001 /*------------------------------------------------------------------------
00002  *  Copyright 2008-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
00003  *
00004  *  This file is part of the ZBar Bar Code Reader.
00005  *
00006  *  The ZBar Bar Code Reader is free software; you can redistribute it
00007  *  and/or modify it under the terms of the GNU Lesser Public License as
00008  *  published by the Free Software Foundation; either version 2.1 of
00009  *  the License, or (at your option) any later version.
00010  *
00011  *  The ZBar Bar Code Reader is distributed in the hope that it will be
00012  *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty
00013  *  of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU Lesser Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU Lesser Public License
00017  *  along with the ZBar Bar Code Reader; if not, write to the Free
00018  *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
00019  *  Boston, MA  02110-1301  USA
00020  *
00021  *  http://sourceforge.net/projects/zbar
00022  *------------------------------------------------------------------------*/
00023 
00024 #include <config.h>
00025 #include <stdlib.h>     /* strtol */
00026 #include <string.h>     /* strchr, strncmp, strlen */
00027 #include <errno.h>
00028 #include <assert.h>
00029 
00030 #include <zbar.h>
00031 
00032 int zbar_parse_config (const char *cfgstr,
00033                         zbar_symbol_type_t *sym,
00034                         zbar_config_t *cfg,
00035                         int *val)
00036 {
00037     if(!cfgstr)
00038         return(1);
00039 
00040     const char *dot = strchr(cfgstr, '.');
00041     if(dot) {
00042         int len = dot - cfgstr;
00043         if(!len || (len == 1 && !strncmp(cfgstr, "*", len)))
00044             *sym = 0;
00045         else if(len < 2)
00046             return(1);
00047         else if(!strncmp(cfgstr, "qrcode", len))
00048             *sym = ZBAR_QRCODE;
00049         else if(len < 3)
00050             return(1);
00051         else if(!strncmp(cfgstr, "upca", len))
00052             *sym = ZBAR_UPCA;
00053         else if(!strncmp(cfgstr, "upce", len))
00054             *sym = ZBAR_UPCE;
00055         else if(!strncmp(cfgstr, "ean13", len))
00056             *sym = ZBAR_EAN13;
00057         else if(!strncmp(cfgstr, "ean8", len))
00058             *sym = ZBAR_EAN8;
00059         else if(!strncmp(cfgstr, "i25", len))
00060             *sym = ZBAR_I25;
00061         else if(len < 4)
00062             return(1);
00063         else if(!strncmp(cfgstr, "scanner", len))
00064             *sym = ZBAR_PARTIAL; /* FIXME lame */
00065         else if(!strncmp(cfgstr, "isbn13", len))
00066             *sym = ZBAR_ISBN13;
00067         else if(!strncmp(cfgstr, "isbn10", len))
00068             *sym = ZBAR_ISBN10;
00069 #if 0
00070         /* FIXME addons are configured per-main symbol type */
00071         else if(!strncmp(cfgstr, "addon2", len))
00072             *sym = ZBAR_ADDON2;
00073         else if(!strncmp(cfgstr, "addon5", len))
00074             *sym = ZBAR_ADDON5;
00075 #endif
00076         else if(len < 6)
00077             return(1);
00078         else if(!strncmp(cfgstr, "code39", len))
00079             *sym = ZBAR_CODE39;
00080         else if(!strncmp(cfgstr, "pdf417", len))
00081             *sym = ZBAR_PDF417;
00082         else if(len < 7)
00083             return(1);
00084         else if(!strncmp(cfgstr, "code128", len))
00085             *sym = ZBAR_CODE128;
00086         else
00087             return(1);
00088         cfgstr = dot + 1;
00089     }
00090     else
00091         *sym = 0;
00092 
00093     int len = strlen(cfgstr);
00094     const char *eq = strchr(cfgstr, '=');
00095     if(eq)
00096         len = eq - cfgstr;
00097     else
00098         *val = 1;  /* handle this here so we can override later */
00099     char negate = 0;
00100 
00101     if(len > 3 && !strncmp(cfgstr, "no-", 3)) {
00102         negate = 1;
00103         cfgstr += 3;
00104         len -= 3;
00105     }
00106 
00107     if(len < 1)
00108         return(1);
00109     else if(!strncmp(cfgstr, "y-density", len))
00110         *cfg = ZBAR_CFG_Y_DENSITY;
00111     else if(!strncmp(cfgstr, "x-density", len))
00112         *cfg = ZBAR_CFG_X_DENSITY;
00113     else if(len < 2)
00114         return(1);
00115     else if(!strncmp(cfgstr, "enable", len))
00116         *cfg = ZBAR_CFG_ENABLE;
00117     else if(len < 3)
00118         return(1);
00119     else if(!strncmp(cfgstr, "disable", len)) {
00120         *cfg = ZBAR_CFG_ENABLE;
00121         negate = !negate; /* no-disable ?!? */
00122     }
00123     else if(!strncmp(cfgstr, "min-length", len))
00124         *cfg = ZBAR_CFG_MIN_LEN;
00125     else if(!strncmp(cfgstr, "max-length", len))
00126         *cfg = ZBAR_CFG_MAX_LEN;
00127     else if(!strncmp(cfgstr, "ascii", len))
00128         *cfg = ZBAR_CFG_ASCII;
00129     else if(!strncmp(cfgstr, "add-check", len))
00130         *cfg = ZBAR_CFG_ADD_CHECK;
00131     else if(!strncmp(cfgstr, "emit-check", len))
00132         *cfg = ZBAR_CFG_EMIT_CHECK;
00133     else if(!strncmp(cfgstr, "position", len))
00134         *cfg = ZBAR_CFG_POSITION;
00135     else 
00136         return(1);
00137 
00138     if(eq) {
00139         errno = 0;
00140         *val = strtol(eq + 1, NULL, 0);
00141         if(errno)
00142             return(1);
00143     }
00144     if(negate)
00145         *val = !*val;
00146 
00147     return(0);
00148 }
00149