diff options
Diffstat (limited to 'Build/source/libs/libpng/libpng-src/contrib/arm-neon/linux.c')
-rw-r--r-- | Build/source/libs/libpng/libpng-src/contrib/arm-neon/linux.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/Build/source/libs/libpng/libpng-src/contrib/arm-neon/linux.c b/Build/source/libs/libpng/libpng-src/contrib/arm-neon/linux.c deleted file mode 100644 index a9bc360dd5b..00000000000 --- a/Build/source/libs/libpng/libpng-src/contrib/arm-neon/linux.c +++ /dev/null @@ -1,161 +0,0 @@ -/* contrib/arm-neon/linux.c - * - * Last changed in libpng 1.6.31 [July 27, 2017] - * Copyright (c) 2014, 2017 Glenn Randers-Pehrson - * Written by John Bowler, 2014, 2017. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: SUPPORTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for Linux by reading the widely available - * pseudo-file /proc/cpuinfo. - * - * This code is strict ANSI-C and is probably moderately portable; it does - * however use <stdio.h> and it assumes that /proc/cpuinfo is never localized. - */ -#include <stdio.h> - -static int -png_have_neon(png_structp png_ptr) -{ - FILE *f = fopen("/proc/cpuinfo", "rb"); - - if (f != NULL) - { - /* This is a simple state machine which reads the input byte-by-byte until - * it gets a match on the 'neon' feature or reaches the end of the stream. - */ - static const char ch_feature[] = { 70, 69, 65, 84, 85, 82, 69, 83 }; - static const char ch_neon[] = { 78, 69, 79, 78 }; - - enum - { - StartLine, Feature, Colon, StartTag, Neon, HaveNeon, SkipTag, SkipLine - } state; - int counter; - - for (state=StartLine, counter=0;;) - { - int ch = fgetc(f); - - if (ch == EOF) - { - /* EOF means error or end-of-file, return false; neon at EOF is - * assumed to be a mistake. - */ - fclose(f); - return 0; - } - - switch (state) - { - case StartLine: - /* Match spaces at the start of line */ - if (ch <= 32) /* skip control characters and space */ - break; - - counter=0; - state = Feature; - /* FALLTHROUGH */ - - case Feature: - /* Match 'FEATURE', ASCII case insensitive. */ - if ((ch & ~0x20) == ch_feature[counter]) - { - if (++counter == (sizeof ch_feature)) - state = Colon; - break; - } - - /* did not match 'feature' */ - state = SkipLine; - /* FALLTHROUGH */ - - case SkipLine: - skipLine: - /* Skip everything until we see linefeed or carriage return */ - if (ch != 10 && ch != 13) - break; - - state = StartLine; - break; - - case Colon: - /* Match any number of space or tab followed by ':' */ - if (ch == 32 || ch == 9) - break; - - if (ch == 58) /* i.e. ':' */ - { - state = StartTag; - break; - } - - /* Either a bad line format or a 'feature' prefix followed by - * other characters. - */ - state = SkipLine; - goto skipLine; - - case StartTag: - /* Skip space characters before a tag */ - if (ch == 32 || ch == 9) - break; - - state = Neon; - counter = 0; - /* FALLTHROUGH */ - - case Neon: - /* Look for 'neon' tag */ - if ((ch & ~0x20) == ch_neon[counter]) - { - if (++counter == (sizeof ch_neon)) - state = HaveNeon; - break; - } - - state = SkipTag; - /* FALLTHROUGH */ - - case SkipTag: - /* Skip non-space characters */ - if (ch == 10 || ch == 13) - state = StartLine; - - else if (ch == 32 || ch == 9) - state = StartTag; - break; - - case HaveNeon: - /* Have seen a 'neon' prefix, but there must be a space or new - * line character to terminate it. - */ - if (ch == 10 || ch == 13 || ch == 32 || ch == 9) - { - fclose(f); - return 1; - } - - state = SkipTag; - break; - - default: - png_error(png_ptr, "png_have_neon: internal error (bug)"); - } - } - } - -#ifdef PNG_WARNINGS_SUPPORTED - else - png_warning(png_ptr, "/proc/cpuinfo open failed"); -#endif - - return 0; -} |