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https://github.com/jart/cosmopolitan.git
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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
121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
/* clang-format off */
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/* stringlib: find/index implementation */
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#include "third_party/python/Include/modsupport.h"
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#ifndef STRINGLIB_FASTSEARCH_H
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#error must include fastsearch.inc before including this module
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#endif
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(find)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t offset)
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{
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Py_ssize_t pos;
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assert(str_len >= 0);
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if (sub_len == 0)
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return offset;
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pos = FASTSEARCH(str, str_len, sub, sub_len, -1, FAST_SEARCH);
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if (pos >= 0)
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pos += offset;
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return pos;
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(rfind)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t offset)
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{
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Py_ssize_t pos;
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assert(str_len >= 0);
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if (sub_len == 0)
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return str_len + offset;
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pos = FASTSEARCH(str, str_len, sub, sub_len, -1, FAST_RSEARCH);
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if (pos >= 0)
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pos += offset;
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return pos;
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(find_slice)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t start, Py_ssize_t end)
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{
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return STRINGLIB(find)(str + start, end - start, sub, sub_len, start);
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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STRINGLIB(rfind_slice)(const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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const STRINGLIB_CHAR* sub, Py_ssize_t sub_len,
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Py_ssize_t start, Py_ssize_t end)
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{
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return STRINGLIB(rfind)(str + start, end - start, sub, sub_len, start);
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}
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#ifdef STRINGLIB_WANT_CONTAINS_OBJ
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Py_LOCAL_INLINE(int)
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STRINGLIB(contains_obj)(PyObject* str, PyObject* sub)
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{
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return STRINGLIB(find)(
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STRINGLIB_STR(str), STRINGLIB_LEN(str),
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STRINGLIB_STR(sub), STRINGLIB_LEN(sub), 0
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) != -1;
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}
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#endif /* STRINGLIB_WANT_CONTAINS_OBJ */
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/*
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This function is a helper for the "find" family (find, rfind, index,
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rindex) and for count, startswith and endswith, because they all have
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the same behaviour for the arguments.
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It does not touch the variables received until it knows everything
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is ok.
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*/
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#define FORMAT_BUFFER_SIZE 50
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Py_LOCAL_INLINE(int)
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STRINGLIB(parse_args_finds)(const char * function_name, PyObject *args,
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PyObject **subobj,
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Py_ssize_t *start, Py_ssize_t *end)
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{
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PyObject *tmp_subobj;
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Py_ssize_t tmp_start = 0;
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Py_ssize_t tmp_end = PY_SSIZE_T_MAX;
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PyObject *obj_start=Py_None, *obj_end=Py_None;
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char format[FORMAT_BUFFER_SIZE] = "O|OO:";
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size_t len = strlen(format);
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strncpy(format + len, function_name, FORMAT_BUFFER_SIZE - len - 1);
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format[FORMAT_BUFFER_SIZE - 1] = '\0';
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if (!PyArg_ParseTuple(args, format, &tmp_subobj, &obj_start, &obj_end))
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return 0;
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/* To support None in "start" and "end" arguments, meaning
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the same as if they were not passed.
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*/
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if (obj_start != Py_None)
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if (!_PyEval_SliceIndex(obj_start, &tmp_start))
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return 0;
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if (obj_end != Py_None)
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if (!_PyEval_SliceIndex(obj_end, &tmp_end))
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return 0;
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*start = tmp_start;
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*end = tmp_end;
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*subobj = tmp_subobj;
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return 1;
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}
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#undef FORMAT_BUFFER_SIZE
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