952     size_t len;  in jd_prepare()  local
978         len = LDB_WORD(seg + 2);    /* Length field */  in jd_prepare()
979         if(len <= 2 || (marker >> 8) != 0xFF) return JDR_FMT1;  in jd_prepare()
980         len -= 2;           /* Segment content size */  in jd_prepare()
981         ofs += 4 + len;     /* Number of bytes loaded */  in jd_prepare()
985                 if(len > JD_SZBUF) return JDR_MEM2;  in jd_prepare()
986                 if(jd->infunc(jd, seg, len) != len) return JDR_INP;     /* Load segment data */  in jd_prepare()
1012                 if(len > JD_SZBUF) return JDR_MEM2;  in jd_prepare()
1013                 if(jd->infunc(jd, seg, len) != len) return JDR_INP;     /* Load segment data */  in jd_prepare()
1019                 if(len > JD_SZBUF) return JDR_MEM2;  in jd_prepare()
1020                 if(jd->infunc(jd, seg, len) != len) return JDR_INP;     /* Load segment data */  in jd_prepare()
1022                 rc = create_huffman_tbl(jd, seg, len);  /* Create huffman tables */  in jd_prepare()
1027                 if(len > JD_SZBUF) return JDR_MEM2;  in jd_prepare()
1028                 if(jd->infunc(jd, seg, len) != len) return JDR_INP;     /* Load segment data */  in jd_prepare()
1030                 rc = create_qt_tbl(jd, seg, len);   /* Create de-quantizer tables */  in jd_prepare()
1035                 if(len > JD_SZBUF) return JDR_MEM2;  in jd_prepare()
1036                 if(jd->infunc(jd, seg, len) != len) return JDR_INP;     /* Load segment data */  in jd_prepare()
1057 …          len = n * 64 * 2 + 64;                      /* Allocate buffer for IDCT and RGB output */  in jd_prepare()
1058 …       if(len < 256) len = 256;                    /* but at least 256 byte is required for IDCT */  in jd_prepare()
1060 …       len);          /* and it may occupy a part of following MCU working buffer for RGB output */  in jd_prepare()
1090                 if(jd->infunc(jd, 0, len) != len) return JDR_INP;  in jd_prepare()