[17182] | 1 | <?php
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| 2 | //
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| 3 | // FPDI - Version 1.2
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| 4 | //
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| 5 | // Copyright 2004-2007 Setasign - Jan Slabon
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| 6 | //
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| 7 | // Licensed under the Apache License, Version 2.0 (the "License");
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| 8 | // you may not use this file except in compliance with the License.
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| 9 | // You may obtain a copy of the License at
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| 10 | //
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| 11 | // http://www.apache.org/licenses/LICENSE-2.0
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| 12 | //
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| 13 | // Unless required by applicable law or agreed to in writing, software
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| 14 | // distributed under the License is distributed on an "AS IS" BASIS,
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| 15 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | // See the License for the specific language governing permissions and
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| 17 | // limitations under the License.
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| 18 | //
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| 19 |
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| 20 | class pdf_context {
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| 21 |
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| 22 | var $file;
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| 23 | var $buffer;
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| 24 | var $offset;
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| 25 | var $length;
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| 26 |
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| 27 | var $stack;
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| 28 |
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| 29 | // Constructor
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| 30 |
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| 31 | function pdf_context($f) {
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| 32 | $this->file = $f;
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| 33 | $this->reset();
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| 34 | }
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| 35 |
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| 36 | // Optionally move the file
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| 37 | // pointer to a new location
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| 38 | // and reset the buffered data
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| 39 |
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| 40 | function reset($pos = null, $l = 100) {
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| 41 | if (!is_null ($pos)) {
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| 42 | fseek ($this->file, $pos);
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| 43 | }
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| 44 |
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| 45 | $this->buffer = $l > 0 ? fread($this->file, $l) : '';
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| 46 | $this->offset = 0;
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| 47 | $this->length = strlen($this->buffer);
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| 48 | $this->stack = array();
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| 49 | }
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| 50 |
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| 51 | // Make sure that there is at least one
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| 52 | // character beyond the current offset in
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| 53 | // the buffer to prevent the tokenizer
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| 54 | // from attempting to access data that does
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| 55 | // not exist
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| 56 |
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| 57 | function ensure_content() {
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| 58 | if ($this->offset >= $this->length - 1) {
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| 59 | return $this->increase_length();
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| 60 | } else {
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| 61 | return true;
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| 62 | }
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| 63 | }
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| 64 |
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| 65 | // Forcefully read more data into the buffer
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| 66 |
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| 67 | function increase_length($l=100) {
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| 68 | if (feof($this->file)) {
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| 69 | return false;
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| 70 | } else {
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| 71 | $this->buffer .= fread($this->file, $l);
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| 72 | $this->length = strlen($this->buffer);
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| 73 | return true;
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| 74 | }
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| 75 | }
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| 76 |
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| 77 | }
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| 78 | ?> |
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