annotate mupdf-source/thirdparty/extract/README @ 46:7ee69f120f19 default tip

>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 Directory tree:
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3 Makefile Builds and runs tests.
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4 include/ Public API.
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5 src/ Scripts, C implementation and internal headers.
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6 build/ Generated object files, executables etc.
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7 test/ Test files.
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8 generated/ Files generated by tests.
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10 Suggested setup for testing:
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11 Checkout ghostpdl and mupdf into the same directory.
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12 Inside ghostpdl:
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13 ln -s ../mupdf/thirdparty/extract extract
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15 Then either:
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16 Inside ghostpdl:
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17 ./autogen.sh --with-extract-dir=extract
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18 make -j 8 debug DEBUGDIRPREFIX=debug-extract-
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19 Inside mupdf:
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20 make -j 8 debug
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21 or:
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22 make test-rebuild-dependent-binaries (for the first time)
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23 make test-build-dependent-binaries (for incremental builds)
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26 Then build and run tests from inside mupdf/thirdparty/extract
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27 as below.
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29 Build and run tests with:
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30 make
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32 Conventions:
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34 Errors:
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36 Functions return zero on success or -1 with errno set.
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38 Identifier/symbol names:
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40 All identifiers that can be seen by client code (generally things
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41 defined in include/) start with 'extract_'.
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43 Similarly global symbols in generated .o files all start with
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44 'extract_'; this is tested by target 'test-obj'.
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46 Other identifiers and symbols do not have an 'extract_' prefix - not
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47 necessary because client code cannot see these names.
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49 Header names in include/ start with 'extract_'.
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51 Allocation:
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53 Functions that free a data structure generally take a double pointer
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54 so that they can set the pointer to NULL before returning, which helps
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55 avoid stray invalid non-NULL pointers. E.g.:
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57 extract_span_free(extract_alloc_t* alloc, span_t** pspan);
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58 /* Frees a span_t, returning with *pspan set to NULL. */
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60 This double-pointer approach is also used for raw allocation - see
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61 include/extract_alloc.h.
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63 Lists:
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64 Lists of data items are generally implemented using an array of
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65 pointers and an int 'foo_num' entry, e.g.:
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67 line_t** lines;
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68 int lines_num;
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69