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-rw-r--r--ext/psych/yaml/reader.c469
1 files changed, 0 insertions, 469 deletions
diff --git a/ext/psych/yaml/reader.c b/ext/psych/yaml/reader.c
deleted file mode 100644
index f3ac54c251..0000000000
--- a/ext/psych/yaml/reader.c
+++ /dev/null
@@ -1,469 +0,0 @@
-
-#include "yaml_private.h"
-
-/*
- * Declarations.
- */
-
-static int
-yaml_parser_set_reader_error(yaml_parser_t *parser, const char *problem,
- size_t offset, int value);
-
-static int
-yaml_parser_update_raw_buffer(yaml_parser_t *parser);
-
-static int
-yaml_parser_determine_encoding(yaml_parser_t *parser);
-
-YAML_DECLARE(int)
-yaml_parser_update_buffer(yaml_parser_t *parser, size_t length);
-
-/*
- * Set the reader error and return 0.
- */
-
-static int
-yaml_parser_set_reader_error(yaml_parser_t *parser, const char *problem,
- size_t offset, int value)
-{
- parser->error = YAML_READER_ERROR;
- parser->problem = problem;
- parser->problem_offset = offset;
- parser->problem_value = value;
-
- return 0;
-}
-
-/*
- * Byte order marks.
- */
-
-#define BOM_UTF8 "\xef\xbb\xbf"
-#define BOM_UTF16LE "\xff\xfe"
-#define BOM_UTF16BE "\xfe\xff"
-
-/*
- * Determine the input stream encoding by checking the BOM symbol. If no BOM is
- * found, the UTF-8 encoding is assumed. Return 1 on success, 0 on failure.
- */
-
-static int
-yaml_parser_determine_encoding(yaml_parser_t *parser)
-{
- /* Ensure that we had enough bytes in the raw buffer. */
-
- while (!parser->eof
- && parser->raw_buffer.last - parser->raw_buffer.pointer < 3) {
- if (!yaml_parser_update_raw_buffer(parser)) {
- return 0;
- }
- }
-
- /* Determine the encoding. */
-
- if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 2
- && !memcmp(parser->raw_buffer.pointer, BOM_UTF16LE, 2)) {
- parser->encoding = YAML_UTF16LE_ENCODING;
- parser->raw_buffer.pointer += 2;
- parser->offset += 2;
- }
- else if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 2
- && !memcmp(parser->raw_buffer.pointer, BOM_UTF16BE, 2)) {
- parser->encoding = YAML_UTF16BE_ENCODING;
- parser->raw_buffer.pointer += 2;
- parser->offset += 2;
- }
- else if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 3
- && !memcmp(parser->raw_buffer.pointer, BOM_UTF8, 3)) {
- parser->encoding = YAML_UTF8_ENCODING;
- parser->raw_buffer.pointer += 3;
- parser->offset += 3;
- }
- else {
- parser->encoding = YAML_UTF8_ENCODING;
- }
-
- return 1;
-}
-
-/*
- * Update the raw buffer.
- */
-
-static int
-yaml_parser_update_raw_buffer(yaml_parser_t *parser)
-{
- size_t size_read = 0;
-
- /* Return if the raw buffer is full. */
-
- if (parser->raw_buffer.start == parser->raw_buffer.pointer
- && parser->raw_buffer.last == parser->raw_buffer.end)
- return 1;
-
- /* Return on EOF. */
-
- if (parser->eof) return 1;
-
- /* Move the remaining bytes in the raw buffer to the beginning. */
-
- if (parser->raw_buffer.start < parser->raw_buffer.pointer
- && parser->raw_buffer.pointer < parser->raw_buffer.last) {
- memmove(parser->raw_buffer.start, parser->raw_buffer.pointer,
- parser->raw_buffer.last - parser->raw_buffer.pointer);
- }
- parser->raw_buffer.last -=
- parser->raw_buffer.pointer - parser->raw_buffer.start;
- parser->raw_buffer.pointer = parser->raw_buffer.start;
-
- /* Call the read handler to fill the buffer. */
-
- if (!parser->read_handler(parser->read_handler_data, parser->raw_buffer.last,
- parser->raw_buffer.end - parser->raw_buffer.last, &size_read)) {
- return yaml_parser_set_reader_error(parser, "input error",
- parser->offset, -1);
- }
- parser->raw_buffer.last += size_read;
- if (!size_read) {
- parser->eof = 1;
- }
-
- return 1;
-}
-
-/*
- * Ensure that the buffer contains at least `length` characters.
- * Return 1 on success, 0 on failure.
- *
- * The length is supposed to be significantly less that the buffer size.
- */
-
-YAML_DECLARE(int)
-yaml_parser_update_buffer(yaml_parser_t *parser, size_t length)
-{
- int first = 1;
-
- assert(parser->read_handler); /* Read handler must be set. */
-
- /* If the EOF flag is set and the raw buffer is empty, do nothing. */
-
- if (parser->eof && parser->raw_buffer.pointer == parser->raw_buffer.last)
- return 1;
-
- /* Return if the buffer contains enough characters. */
-
- if (parser->unread >= length)
- return 1;
-
- /* Determine the input encoding if it is not known yet. */
-
- if (!parser->encoding) {
- if (!yaml_parser_determine_encoding(parser))
- return 0;
- }
-
- /* Move the unread characters to the beginning of the buffer. */
-
- if (parser->buffer.start < parser->buffer.pointer
- && parser->buffer.pointer < parser->buffer.last) {
- size_t size = parser->buffer.last - parser->buffer.pointer;
- memmove(parser->buffer.start, parser->buffer.pointer, size);
- parser->buffer.pointer = parser->buffer.start;
- parser->buffer.last = parser->buffer.start + size;
- }
- else if (parser->buffer.pointer == parser->buffer.last) {
- parser->buffer.pointer = parser->buffer.start;
- parser->buffer.last = parser->buffer.start;
- }
-
- /* Fill the buffer until it has enough characters. */
-
- while (parser->unread < length)
- {
- /* Fill the raw buffer if necessary. */
-
- if (!first || parser->raw_buffer.pointer == parser->raw_buffer.last) {
- if (!yaml_parser_update_raw_buffer(parser)) return 0;
- }
- first = 0;
-
- /* Decode the raw buffer. */
-
- while (parser->raw_buffer.pointer != parser->raw_buffer.last)
- {
- unsigned int value = 0, value2 = 0;
- int incomplete = 0;
- unsigned char octet;
- unsigned int width = 0;
- int low, high;
- size_t k;
- size_t raw_unread = parser->raw_buffer.last - parser->raw_buffer.pointer;
-
- /* Decode the next character. */
-
- switch (parser->encoding)
- {
- case YAML_UTF8_ENCODING:
-
- /*
- * Decode a UTF-8 character. Check RFC 3629
- * (http://www.ietf.org/rfc/rfc3629.txt) for more details.
- *
- * The following table (taken from the RFC) is used for
- * decoding.
- *
- * Char. number range | UTF-8 octet sequence
- * (hexadecimal) | (binary)
- * --------------------+------------------------------------
- * 0000 0000-0000 007F | 0xxxxxxx
- * 0000 0080-0000 07FF | 110xxxxx 10xxxxxx
- * 0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
- * 0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
- *
- * Additionally, the characters in the range 0xD800-0xDFFF
- * are prohibited as they are reserved for use with UTF-16
- * surrogate pairs.
- */
-
- /* Determine the length of the UTF-8 sequence. */
-
- octet = parser->raw_buffer.pointer[0];
- width = (octet & 0x80) == 0x00 ? 1 :
- (octet & 0xE0) == 0xC0 ? 2 :
- (octet & 0xF0) == 0xE0 ? 3 :
- (octet & 0xF8) == 0xF0 ? 4 : 0;
-
- /* Check if the leading octet is valid. */
-
- if (!width)
- return yaml_parser_set_reader_error(parser,
- "invalid leading UTF-8 octet",
- parser->offset, octet);
-
- /* Check if the raw buffer contains an incomplete character. */
-
- if (width > raw_unread) {
- if (parser->eof) {
- return yaml_parser_set_reader_error(parser,
- "incomplete UTF-8 octet sequence",
- parser->offset, -1);
- }
- incomplete = 1;
- break;
- }
-
- /* Decode the leading octet. */
-
- value = (octet & 0x80) == 0x00 ? octet & 0x7F :
- (octet & 0xE0) == 0xC0 ? octet & 0x1F :
- (octet & 0xF0) == 0xE0 ? octet & 0x0F :
- (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0;
-
- /* Check and decode the trailing octets. */
-
- for (k = 1; k < width; k ++)
- {
- octet = parser->raw_buffer.pointer[k];
-
- /* Check if the octet is valid. */
-
- if ((octet & 0xC0) != 0x80)
- return yaml_parser_set_reader_error(parser,
- "invalid trailing UTF-8 octet",
- parser->offset+k, octet);
-
- /* Decode the octet. */
-
- value = (value << 6) + (octet & 0x3F);
- }
-
- /* Check the length of the sequence against the value. */
-
- if (!((width == 1) ||
- (width == 2 && value >= 0x80) ||
- (width == 3 && value >= 0x800) ||
- (width == 4 && value >= 0x10000)))
- return yaml_parser_set_reader_error(parser,
- "invalid length of a UTF-8 sequence",
- parser->offset, -1);
-
- /* Check the range of the value. */
-
- if ((value >= 0xD800 && value <= 0xDFFF) || value > 0x10FFFF)
- return yaml_parser_set_reader_error(parser,
- "invalid Unicode character",
- parser->offset, value);
-
- break;
-
- case YAML_UTF16LE_ENCODING:
- case YAML_UTF16BE_ENCODING:
-
- low = (parser->encoding == YAML_UTF16LE_ENCODING ? 0 : 1);
- high = (parser->encoding == YAML_UTF16LE_ENCODING ? 1 : 0);
-
- /*
- * The UTF-16 encoding is not as simple as one might
- * naively think. Check RFC 2781
- * (http://www.ietf.org/rfc/rfc2781.txt).
- *
- * Normally, two subsequent bytes describe a Unicode
- * character. However a special technique (called a
- * surrogate pair) is used for specifying character
- * values larger than 0xFFFF.
- *
- * A surrogate pair consists of two pseudo-characters:
- * high surrogate area (0xD800-0xDBFF)
- * low surrogate area (0xDC00-0xDFFF)
- *
- * The following formulas are used for decoding
- * and encoding characters using surrogate pairs:
- *
- * U = U' + 0x10000 (0x01 00 00 <= U <= 0x10 FF FF)
- * U' = yyyyyyyyyyxxxxxxxxxx (0 <= U' <= 0x0F FF FF)
- * W1 = 110110yyyyyyyyyy
- * W2 = 110111xxxxxxxxxx
- *
- * where U is the character value, W1 is the high surrogate
- * area, W2 is the low surrogate area.
- */
-
- /* Check for incomplete UTF-16 character. */
-
- if (raw_unread < 2) {
- if (parser->eof) {
- return yaml_parser_set_reader_error(parser,
- "incomplete UTF-16 character",
- parser->offset, -1);
- }
- incomplete = 1;
- break;
- }
-
- /* Get the character. */
-
- value = parser->raw_buffer.pointer[low]
- + (parser->raw_buffer.pointer[high] << 8);
-
- /* Check for unexpected low surrogate area. */
-
- if ((value & 0xFC00) == 0xDC00)
- return yaml_parser_set_reader_error(parser,
- "unexpected low surrogate area",
- parser->offset, value);
-
- /* Check for a high surrogate area. */
-
- if ((value & 0xFC00) == 0xD800) {
-
- width = 4;
-
- /* Check for incomplete surrogate pair. */
-
- if (raw_unread < 4) {
- if (parser->eof) {
- return yaml_parser_set_reader_error(parser,
- "incomplete UTF-16 surrogate pair",
- parser->offset, -1);
- }
- incomplete = 1;
- break;
- }
-
- /* Get the next character. */
-
- value2 = parser->raw_buffer.pointer[low+2]
- + (parser->raw_buffer.pointer[high+2] << 8);
-
- /* Check for a low surrogate area. */
-
- if ((value2 & 0xFC00) != 0xDC00)
- return yaml_parser_set_reader_error(parser,
- "expected low surrogate area",
- parser->offset+2, value2);
-
- /* Generate the value of the surrogate pair. */
-
- value = 0x10000 + ((value & 0x3FF) << 10) + (value2 & 0x3FF);
- }
-
- else {
- width = 2;
- }
-
- break;
-
- default:
- assert(1); /* Impossible. */
- }
-
- /* Check if the raw buffer contains enough bytes to form a character. */
-
- if (incomplete) break;
-
- /*
- * Check if the character is in the allowed range:
- * #x9 | #xA | #xD | [#x20-#x7E] (8 bit)
- * | #x85 | [#xA0-#xD7FF] | [#xE000-#xFFFD] (16 bit)
- * | [#x10000-#x10FFFF] (32 bit)
- */
-
- if (! (value == 0x09 || value == 0x0A || value == 0x0D
- || (value >= 0x20 && value <= 0x7E)
- || (value == 0x85) || (value >= 0xA0 && value <= 0xD7FF)
- || (value >= 0xE000 && value <= 0xFFFD)
- || (value >= 0x10000 && value <= 0x10FFFF)))
- return yaml_parser_set_reader_error(parser,
- "control characters are not allowed",
- parser->offset, value);
-
- /* Move the raw pointers. */
-
- parser->raw_buffer.pointer += width;
- parser->offset += width;
-
- /* Finally put the character into the buffer. */
-
- /* 0000 0000-0000 007F -> 0xxxxxxx */
- if (value <= 0x7F) {
- *(parser->buffer.last++) = value;
- }
- /* 0000 0080-0000 07FF -> 110xxxxx 10xxxxxx */
- else if (value <= 0x7FF) {
- *(parser->buffer.last++) = 0xC0 + (value >> 6);
- *(parser->buffer.last++) = 0x80 + (value & 0x3F);
- }
- /* 0000 0800-0000 FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */
- else if (value <= 0xFFFF) {
- *(parser->buffer.last++) = 0xE0 + (value >> 12);
- *(parser->buffer.last++) = 0x80 + ((value >> 6) & 0x3F);
- *(parser->buffer.last++) = 0x80 + (value & 0x3F);
- }
- /* 0001 0000-0010 FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
- else {
- *(parser->buffer.last++) = 0xF0 + (value >> 18);
- *(parser->buffer.last++) = 0x80 + ((value >> 12) & 0x3F);
- *(parser->buffer.last++) = 0x80 + ((value >> 6) & 0x3F);
- *(parser->buffer.last++) = 0x80 + (value & 0x3F);
- }
-
- parser->unread ++;
- }
-
- /* On EOF, put NUL into the buffer and return. */
-
- if (parser->eof) {
- *(parser->buffer.last++) = '\0';
- parser->unread ++;
- return 1;
- }
-
- }
-
- if (parser->offset >= MAX_FILE_SIZE) {
- return yaml_parser_set_reader_error(parser, "input is too long",
- parser->offset, -1);
- }
-
- return 1;
-}
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