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b420ed8248
This change gets the Python codebase into a state where it conforms to the conventions of this codebase. It's now possible to include headers from Python, without worrying about ordering. Python has traditionally solved that problem by "diamonding" everything in Python.h, but that's problematic since it means any change to any Python header invalidates all the build artifacts. Lastly it makes tooling not work. Since it is hard to explain to Emacs when I press C-c C-h to add an import line it shouldn't add the header that actually defines the symbol, and instead do follow the nonstandard Python convention. Progress has been made on letting Python load source code from the zip executable structure via the standard C library APIs. System calss now recognizes zip!FILENAME alternative URIs as equivalent to zip:FILENAME since Python uses colon as its delimiter. Some progress has been made on embedding the notice license terms into the Python object code. This is easier said than done since Python has an extremely complicated ownership story. - Some termios APIs have been added - Implement rewinddir() dirstream API - GetCpuCount() API added to Cosmopolitan Libc - More bugs in Cosmopolitan Libc have been fixed - zipobj.com now has flags for mangling the path - Fixed bug a priori with sendfile() on certain BSDs - Polyfill F_DUPFD and F_DUPFD_CLOEXEC across platforms - FIOCLEX / FIONCLEX now polyfilled for fast O_CLOEXEC changes - APE now supports a hybrid solution to no-self-modify for builds - Many BSD-only magnums added, e.g. O_SEARCH, O_SHLOCK, SF_NODISKIO
88 lines
2 KiB
C
88 lines
2 KiB
C
#ifndef Py_GRAMMAR_H
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#define Py_GRAMMAR_H
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#include "libc/stdio/stdio.h"
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#include "third_party/python/Include/bitset.h"
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COSMOPOLITAN_C_START_
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/* clang-format off */
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/* A label of an arc */
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typedef struct {
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int lb_type;
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char *lb_str;
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} label;
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#define EMPTY 0 /* Label number 0 is by definition the empty label */
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/* A list of labels */
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typedef struct {
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int ll_nlabels;
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label *ll_label;
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} labellist;
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/* An arc from one state to another */
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typedef struct {
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short a_lbl; /* Label of this arc */
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short a_arrow; /* State where this arc goes to */
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} arc;
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/* A state in a DFA */
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typedef struct {
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int s_narcs;
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arc *s_arc; /* Array of arcs */
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/* Optional accelerators */
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int s_lower; /* Lowest label index */
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int s_upper; /* Highest label index */
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int *s_accel; /* Accelerator */
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int s_accept; /* Nonzero for accepting state */
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} state;
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/* A DFA */
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typedef struct {
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int d_type; /* Non-terminal this represents */
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char *d_name; /* For printing */
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int d_initial; /* Initial state */
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int d_nstates;
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state *d_state; /* Array of states */
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bitset d_first;
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} dfa;
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/* A grammar */
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typedef struct {
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int g_ndfas;
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dfa *g_dfa; /* Array of DFAs */
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labellist g_ll;
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int g_start; /* Start symbol of the grammar */
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int g_accel; /* Set if accelerators present */
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} grammar;
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/* FUNCTIONS */
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grammar *newgrammar(int start);
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void freegrammar(grammar *g);
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dfa *adddfa(grammar *g, int type, const char *name);
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int addstate(dfa *d);
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void addarc(dfa *d, int from, int to, int lbl);
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dfa *PyGrammar_FindDFA(grammar *g, int type);
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int addlabel(labellist *ll, int type, const char *str);
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int findlabel(labellist *ll, int type, const char *str);
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const char *PyGrammar_LabelRepr(label *lb);
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void translatelabels(grammar *g);
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void addfirstsets(grammar *g);
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void PyGrammar_AddAccelerators(grammar *g);
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void PyGrammar_RemoveAccelerators(grammar *);
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void printgrammar(grammar *g, FILE *fp);
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void printnonterminals(grammar *g, FILE *fp);
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COSMOPOLITAN_C_END_
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#endif /* !Py_GRAMMAR_H */
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