At first, these will be pretty simple programs so you can see how things work. CC BY 4. Buy it on Lulu ». There's nothing special about "23," but I thought it would be great to celebrate the anniversary by having a bunch of past and current users share their stories about why they use FreeDOS. I hope you enjoy this collection of 23 years of everything FreeDOS! Summary from Amazon Master operating system development. Study it, modify it and use it without getting lost in the complexity of most microkernels.
The book and companion disk include the full source code for an 80X86 kernel and support files. The regular expression must be in the Python regex syntax and the file must be UTF-8 encoded. An XPath expression to detect chapter titles. The expression used must evaluate to a list of elements. Specify how to mark detected chapters. A value of " pagebreak " will insert page breaks before chapters. A value of " rule " will insert a line before chapters. A value of " none " will disable chapter marking and a value of " both " will use both page breaks and lines to mark chapters.
Some documents specify page margins by specifying a left and right margin on each individual paragraph. Sometimes, this can cause the removal of margins that should not have been removed.
In this case you can disable the removal. Insert the book metadata at the start of the book. An XPath expression. Page breaks are inserted before the specified elements. Remove the first image from the input e-book.
Useful if the input document has a cover image that is not identified as a cover. In this case, if you set a cover in calibre, the output document will end up with two cover images if you do not specify this option.
An XPath expression to detect the location in the document at which to start reading. Some e-book reading programs most prominently the Kindle use this location as the position at which to open the book. See the XPath tutorial in the calibre User Manual for further help using this feature. Control the automatic generation of a Table of Contents. By default, if the source file has a Table of Contents, it will be used in preference to the automatically generated one.
When creating a TOC from links in the input document, allow duplicate entries, i. XPath expression that specifies all tags that should be added to the Table of Contents at level one. If this is specified, it takes precedence over other forms of auto-detection. XPath expression that specifies all tags that should be added to the Table of Contents at level two.
Each entry is added under the previous level one entry. XPath expression that specifies all tags that should be added to the Table of Contents at level three. Each entry is added under the previous level two entry. Maximum number of links to insert into the TOC. Set to 0 to disable. Default is: Links are only added to the TOC if less than the threshold number of chapters were detected.
Don ' t add auto-detected chapters to the Table of Contents. Remove entries from the Table of Contents whose titles match the specified regular expression. Matching entries and all their children are removed.
If fewer than this number of chapters is detected, then links are added to the Table of Contents. Default: 6. Normally, if the source file already has a Table of Contents, it is used in preference to the auto-generated one. With this option, the auto-generated one is always used.
Set the publication date assumed to be in the local timezone, unless the timezone is explicitly specified. Read metadata from the specified OPF file. Metadata read from this file will override any metadata in the source file. Save the output from different stages of the conversion pipeline to the specified folder. Useful if you are unsure at which stage of the conversion process a bug is occurring. Level of verbosity. Specify multiple times for greater verbosity. Specifying it twice will result in full verbosity, once medium verbosity and zero times least verbosity.
Specify the character encoding of the input document. If set this option will override any encoding declared by the document itself. Particularly useful for documents that do not declare an encoding or that have erroneous encoding declarations. Reduce the number of colors used in the image. This works only if you choose the PNG output format. It is useful to reduce file sizes. Set to zero to turn off. Maximum value is It is off by default.
Specify the image size as width x height pixels, for example: x Normally, an image size is automatically calculated from the output profile, this option overrides it. Disable trimming of comic pages. For some comics, trimming might remove content as well as borders. Note this only applies if the TOC has more than one section. Don ' t split landscape images into two portrait images. Don ' t sort the files found in the comic alphabetically by name.
Instead use the order they were added to the comic. The format that images in the created e-book are converted to. You can experiment to see which format gives you optimal size and look on your device. Used for right-to-left publications like manga. Causes landscape pages to be split into portrait pages from right to left. Keep aspect ratio and scale image using screen height as image width for viewing in landscape mode. Normally, if a large image is present at the start of the document that looks like a cover, it will be removed from the document and used as the cover for created e-book.
This option turns off that behavior. Normally this input plugin re-arranges all the input files into a standard folder hierarchy.
Only use this option if you know what you are doing as it can result in various nasty side effects in the rest of the conversion pipeline. Maximum levels of recursion when following links in HTML files. Must be non-negative. Useful for recipe development. You can change the number of feeds and articles by supplying optional arguments. For example: --test 3 1 will download at most 3 feeds and only 1 article per feed.
Formatting used within the document. Enable extensions to Markdown syntax. Extensions are formatting that is not part of the standard Markdown format.
The extensions enabled by default: footnotes, tables, toc. Paragraph structure to assume. The value of " off " is useful for formatted documents such as Markdown or Textile. Normally extra spaces are condensed into a single space. With this option all spaces will be displayed.
Normally extra space at the beginning of lines is retained. With this option they will be removed. Extract the contents of the generated AZW3 file to the specified folder.
The contents of the folder are first deleted, so be careful. When adding the Table of Contents to the book, add it at the start of the book instead of the end.
Not recommended. Don ' t add Table of Contents to the book. Useful if the book has its own table of contents. If specified, the output plugin will try to create output that is as human readable as possible.
May not have any effect for some output plugins. Enable sharing of book content via Facebook etc. Complain to Amazon. Custom size of the document. Use the form width x height, for example: x to specify the width and height in pts.
This overrides any specified page-size. Do not insert the book cover as an image at the start of the document. If you use this option, the book cover will be discarded.
The size of the bottom page margin, in pts. Default is 72pt. Overrides the common bottom page margin setting, unless set to zero. The size of the left page margin, in pts. Overrides the common left page margin setting. The size of the right page margin, in pts. Overrides the common right page margin setting, unless set to zero. The size of the top page margin, in pts. Overrides the common top page margin setting, unless set to zero.
The size of the page. Default is letter. Extract the contents of the generated DOCX file to the specified folder.
Preserve the aspect ratio of the cover image instead of stretching it out to cover the entire page. Turn off splitting at page breaks. Normally, input files are automatically split at every page break into two files. This gives an output e-book that can be parsed faster and with less resources. However, splitting is slow and if your source file contains a very large number of page breaks, you should turn off splitting on page breaks.
It will flatten the file system inside the EPUB, putting all files into the top level. The version of the EPUB file to generate. Extract the contents of the generated EPUB file to the specified folder.
This is necessary as most EPUB readers cannot handle large file sizes. Set to 0 to disable size based splitting. Normally, if the input file has no cover and you don ' t specify one, a default cover is generated with the title, authors, etc.
This option disables the generation of this cover. Do not use SVG for the book cover. Without this option, such devices will display the cover as a blank page. When using an SVG cover, this option will cause the cover to scale to cover the available screen area, but still preserve its aspect ratio ratio of width to height.
That means there may be white borders at the sides or top and bottom of the image, but the image will never be distorted. Without this option the image may be slightly distorted, but there will be no borders. Genre for the book. Extract the contents of the generated ZIP file to the specified folder.
Default is external. Specify the handling of CSS. Default is class. Set the format of the header. Extract the contents of the generated MOBI file to the specified folder.
This format is compatible with all devices. Allowed values: old, both, new. Ignore margins in the input document. If False, then the MOBI output plugin will try to convert margins specified in the input document, otherwise it will ignore them. This is for maximum compatibility as some older MOBI viewers have problems with other image formats. This option tells calibre not to do this. Tag for MOBI files to be marked as personal documents.
This option has no effect on the conversion. It is used only when sending MOBI files to a device. If the file being sent has the specified tag, it will be marked as a personal document when sent to the Kindle.
Format to use inside the PDB container. Choices are: [ ' doc ' , ' ereader ' , ' ztxt ' ]. Specify the character encoding of the output document.
The default is cp Note: This option is not honored by all formats. Use the form width x height e. This overrides any specified paper-size. The size of the paper. This size will be overridden when a non default output profile is used.
Choices are a0, a1, a2, a3, a4, a5, a6, b0, b1, b2, b3, b4, b5, b6, legal, letter. Useful if you want to print out the PDF. An HTML template used to generate footers on every page.
An HTML template used to generate headers on every page. Break long words at the end of lines. This can give the text at the right margin a more even appearance.
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