424       if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))  in png_read_info()
428       if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))  in png_read_info()
430       else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))  in png_read_info()
435          if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))  in png_read_info()
438          if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))  in png_read_info()
440          else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))  in png_read_info()
451       else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))  in png_read_info()
453       else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))  in png_read_info()
466       else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))  in png_read_info()
470       else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))  in png_read_info()
474       else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))  in png_read_info()
478       else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))  in png_read_info()
482       else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))  in png_read_info()
486       else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))  in png_read_info()
490       else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))  in png_read_info()
494       else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))  in png_read_info()
498       else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))  in png_read_info()
502       else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))  in png_read_info()
506       else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))  in png_read_info()
510       else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))  in png_read_info()
514       else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))  in png_read_info()
518       else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))  in png_read_info()
522       else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))  in png_read_info()
526       else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))  in png_read_info()
530       else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))  in png_read_info()
715             if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))  in png_read_row()
998       if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))  in png_read_end()
1000       else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))  in png_read_end()
1005          if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))  in png_read_end()
1011          if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))  in png_read_end()
1015       else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))  in png_read_end()
1024       else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))  in png_read_end()
1027       else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))  in png_read_end()
1031       else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))  in png_read_end()
1035       else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))  in png_read_end()
1039       else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))  in png_read_end()
1043       else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))  in png_read_end()
1047       else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))  in png_read_end()
1051       else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))  in png_read_end()
1055       else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))  in png_read_end()
1059       else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))  in png_read_end()
1063       else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))  in png_read_end()
1067       else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))  in png_read_end()
1071       else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))  in png_read_end()
1075       else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))  in png_read_end()
1079       else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))  in png_read_end()
1083       else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))  in png_read_end()
1087       else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))  in png_read_end()
1091       else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))  in png_read_end()