mirror of
https://github.com/strongdm/comply
synced 2024-08-25 00:46:48 +00:00
174 lines
4.8 KiB
Go
174 lines
4.8 KiB
Go
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package yaml
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const (
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// The size of the input raw buffer.
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input_raw_buffer_size = 512
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// The size of the input buffer.
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// It should be possible to decode the whole raw buffer.
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input_buffer_size = input_raw_buffer_size * 3
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// The size of the output buffer.
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output_buffer_size = 128
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// The size of the output raw buffer.
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// It should be possible to encode the whole output buffer.
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output_raw_buffer_size = (output_buffer_size*2 + 2)
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// The size of other stacks and queues.
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initial_stack_size = 16
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initial_queue_size = 16
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initial_string_size = 16
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)
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// Check if the character at the specified position is an alphabetical
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// character, a digit, '_', or '-'.
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func is_alpha(b []byte, i int) bool {
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return b[i] >= '0' && b[i] <= '9' || b[i] >= 'A' && b[i] <= 'Z' || b[i] >= 'a' && b[i] <= 'z' || b[i] == '_' || b[i] == '-'
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}
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// Check if the character at the specified position is a digit.
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func is_digit(b []byte, i int) bool {
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return b[i] >= '0' && b[i] <= '9'
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}
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// Get the value of a digit.
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func as_digit(b []byte, i int) int {
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return int(b[i]) - '0'
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}
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// Check if the character at the specified position is a hex-digit.
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func is_hex(b []byte, i int) bool {
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return b[i] >= '0' && b[i] <= '9' || b[i] >= 'A' && b[i] <= 'F' || b[i] >= 'a' && b[i] <= 'f'
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}
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// Get the value of a hex-digit.
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func as_hex(b []byte, i int) int {
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bi := b[i]
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if bi >= 'A' && bi <= 'F' {
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return int(bi) - 'A' + 10
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}
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if bi >= 'a' && bi <= 'f' {
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return int(bi) - 'a' + 10
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}
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return int(bi) - '0'
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}
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// Check if the character is ASCII.
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func is_ascii(b []byte, i int) bool {
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return b[i] <= 0x7F
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}
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// Check if the character at the start of the buffer can be printed unescaped.
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func is_printable(b []byte, i int) bool {
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return ((b[i] == 0x0A) || // . == #x0A
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(b[i] >= 0x20 && b[i] <= 0x7E) || // #x20 <= . <= #x7E
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(b[i] == 0xC2 && b[i+1] >= 0xA0) || // #0xA0 <= . <= #xD7FF
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(b[i] > 0xC2 && b[i] < 0xED) ||
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(b[i] == 0xED && b[i+1] < 0xA0) ||
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(b[i] == 0xEE) ||
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(b[i] == 0xEF && // #xE000 <= . <= #xFFFD
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!(b[i+1] == 0xBB && b[i+2] == 0xBF) && // && . != #xFEFF
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!(b[i+1] == 0xBF && (b[i+2] == 0xBE || b[i+2] == 0xBF))))
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}
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// Check if the character at the specified position is NUL.
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func is_z(b []byte, i int) bool {
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return b[i] == 0x00
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}
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// Check if the beginning of the buffer is a BOM.
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func is_bom(b []byte, i int) bool {
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return b[0] == 0xEF && b[1] == 0xBB && b[2] == 0xBF
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}
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// Check if the character at the specified position is space.
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func is_space(b []byte, i int) bool {
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return b[i] == ' '
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}
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// Check if the character at the specified position is tab.
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func is_tab(b []byte, i int) bool {
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return b[i] == '\t'
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}
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// Check if the character at the specified position is blank (space or tab).
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func is_blank(b []byte, i int) bool {
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//return is_space(b, i) || is_tab(b, i)
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return b[i] == ' ' || b[i] == '\t'
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}
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// Check if the character at the specified position is a line break.
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func is_break(b []byte, i int) bool {
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return (b[i] == '\r' || // CR (#xD)
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b[i] == '\n' || // LF (#xA)
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b[i] == 0xC2 && b[i+1] == 0x85 || // NEL (#x85)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA8 || // LS (#x2028)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA9) // PS (#x2029)
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}
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func is_crlf(b []byte, i int) bool {
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return b[i] == '\r' && b[i+1] == '\n'
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}
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// Check if the character is a line break or NUL.
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func is_breakz(b []byte, i int) bool {
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//return is_break(b, i) || is_z(b, i)
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return ( // is_break:
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b[i] == '\r' || // CR (#xD)
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b[i] == '\n' || // LF (#xA)
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b[i] == 0xC2 && b[i+1] == 0x85 || // NEL (#x85)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA8 || // LS (#x2028)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA9 || // PS (#x2029)
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// is_z:
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b[i] == 0)
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}
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// Check if the character is a line break, space, or NUL.
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func is_spacez(b []byte, i int) bool {
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//return is_space(b, i) || is_breakz(b, i)
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return ( // is_space:
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b[i] == ' ' ||
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// is_breakz:
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b[i] == '\r' || // CR (#xD)
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b[i] == '\n' || // LF (#xA)
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b[i] == 0xC2 && b[i+1] == 0x85 || // NEL (#x85)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA8 || // LS (#x2028)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA9 || // PS (#x2029)
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b[i] == 0)
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}
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// Check if the character is a line break, space, tab, or NUL.
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func is_blankz(b []byte, i int) bool {
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//return is_blank(b, i) || is_breakz(b, i)
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return ( // is_blank:
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b[i] == ' ' || b[i] == '\t' ||
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// is_breakz:
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b[i] == '\r' || // CR (#xD)
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b[i] == '\n' || // LF (#xA)
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b[i] == 0xC2 && b[i+1] == 0x85 || // NEL (#x85)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA8 || // LS (#x2028)
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b[i] == 0xE2 && b[i+1] == 0x80 && b[i+2] == 0xA9 || // PS (#x2029)
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b[i] == 0)
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}
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// Determine the width of the character.
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func width(b byte) int {
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// Don't replace these by a switch without first
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// confirming that it is being inlined.
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if b&0x80 == 0x00 {
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return 1
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}
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if b&0xE0 == 0xC0 {
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return 2
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}
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if b&0xF0 == 0xE0 {
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return 3
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}
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if b&0xF8 == 0xF0 {
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return 4
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}
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return 0
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}
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