2021SC@SDUSC

zbar.h中定义解码符号类型zbar_symbol_type_e，对不同条形码类型进行定义：

typedef enum zbar_symbol_type_e {
    ZBAR_NONE        =      0,  
    ZBAR_PARTIAL     =      1,  
    ZBAR_EAN2        =      2,  
    ZBAR_EAN5        =      5, 
    ZBAR_EAN8        =      8,  
    ZBAR_UPCE        =      9,  
    ZBAR_ISBN10      =     10,  
    ZBAR_UPCA        =     12, 
    ZBAR_EAN13       =     13,  
    ZBAR_ISBN13      =     14, 
    ZBAR_COMPOSITE   =     15, 
    ZBAR_I25         =     25, 
    ZBAR_DATABAR     =     34,  
    ZBAR_DATABAR_EXP =     35,  
    ZBAR_CODABAR     =     38, 
    ZBAR_CODE39      =     39, 
    ZBAR_PDF417      =     57,  
    ZBAR_QRCODE      =     64, 
    ZBAR_CODE93      =     93, 
    ZBAR_CODE128     =    128, 

    ZBAR_SYMBOL      = 0x00ff,
    ZBAR_ADDON2      = 0x0200,
    ZBAR_ADDON5      = 0x0500,
    ZBAR_ADDON       = 0x0700,
} zbar_symbol_type_t;

symbol.c中实现了zbar_get_symbol_name函数检索符号编码的字符串名称。返回指定符号类型的静态字符串名称，如果编码无法识别，则为“UNKNOWN”：

const char *zbar_get_symbol_name (zbar_symbol_type_t sym)
{
    switch(sym & ZBAR_SYMBOL) {
    case ZBAR_EAN2: return("EAN-2");
    case ZBAR_EAN5: return("EAN-5");
    case ZBAR_EAN8: return("EAN-8");
    case ZBAR_UPCE: return("UPC-E");
    case ZBAR_ISBN10: return("ISBN-10");
    case ZBAR_UPCA: return("UPC-A");
    case ZBAR_EAN13: return("EAN-13");
    case ZBAR_ISBN13: return("ISBN-13");
    case ZBAR_COMPOSITE: return("COMPOSITE");
    case ZBAR_I25: return("I2/5");
    case ZBAR_DATABAR: return("DataBar");
    case ZBAR_DATABAR_EXP: return("DataBar-Exp");
    case ZBAR_CODABAR: return("Codabar");
    case ZBAR_CODE39: return("CODE-39");
    case ZBAR_CODE93: return("CODE-93");
    case ZBAR_CODE128: return("CODE-128");
    case ZBAR_PDF417: return("PDF417");
    case ZBAR_QRCODE: return("QR-Code");
    default: return("UNKNOWN");
    }
}

symbol.c中实现了zbar_get_config_name函数检索配置设置的字符串名称。返回配置的静态字符串名称，如果值不是已知配置，则返回空字符串。

const char *zbar_get_config_name (zbar_config_t cfg)
{
    switch(cfg) {
    case ZBAR_CFG_ENABLE: return("ENABLE");
    case ZBAR_CFG_ADD_CHECK: return("ADD_CHECK");
    case ZBAR_CFG_EMIT_CHECK: return("EMIT_CHECK");
    case ZBAR_CFG_ASCII: return("ASCII");
    case ZBAR_CFG_MIN_LEN: return("MIN_LEN");
    case ZBAR_CFG_MAX_LEN: return("MAX_LEN");
    case ZBAR_CFG_UNCERTAINTY: return("UNCERTAINTY");
    case ZBAR_CFG_POSITION: return("POSITION");
    case ZBAR_CFG_X_DENSITY: return("X_DENSITY");
    case ZBAR_CFG_Y_DENSITY: return("Y_DENSITY");
    default: return("");
    }
}

zbar_get_modifier_name函数检索修饰符的字符串名称。返回修饰符的静态字符串名称，如果值不是已知标志，则为空字符串。

const char *zbar_get_modifier_name (zbar_modifier_t mod)
{
    switch(mod) {
    case ZBAR_MOD_GS1: return("GS1");
    case ZBAR_MOD_AIM: return("AIM");
    default: return("");
    }
}

zbar_get_orientation_name函数检索定向的字符串名称。返回指定方向的静态字符串名称，如果无法识别方向，则为“UNKNOWN”：

const char *zbar_get_orientation_name (zbar_orientation_t orient)
{
    switch(orient) {
    case ZBAR_ORIENT_UP: return("UP");
    case ZBAR_ORIENT_RIGHT: return("RIGHT");
    case ZBAR_ORIENT_DOWN: return("DOWN");
    case ZBAR_ORIENT_LEFT: return("LEFT");
    default: return("UNKNOWN");
    }
}