Mercurial > hg
view mercurial/cext/charencode.c @ 35305:483b5dd0f1aa
push: restrict common discovery to the pushed set
This changeset make use of the ability of the set discovery to only search
common changeset for a subset of the repository. Restricting that search to the
pushed set avoid potential waste of time finding out the status of many
unrelated related revision.
Repository with many heads were especially badly affected by this. Here is an
example of findcommonhead discovery for pushing 11 outgoing changeset on a
repository with tens of thousand of unrelated heads. (discovery run over a ssh
link to localhost).
Before:
queries: 92
time: 44.1996s
After:
queries: 3
time: 0.6938s
A x63 speedup even with a network link without latency.
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Wed, 06 Dec 2017 23:33:01 +0100 |
parents | d0912876d7a7 |
children | 81199632fa42 |
line wrap: on
line source
/* charencode.c - miscellaneous character encoding Copyright 2008 Matt Mackall <mpm@selenic.com> and others This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. */ #define PY_SSIZE_T_CLEAN #include <Python.h> #include <assert.h> #include "charencode.h" #include "compat.h" #include "util.h" #ifdef IS_PY3K /* The mapping of Python types is meant to be temporary to get Python * 3 to compile. We should remove this once Python 3 support is fully * supported and proper types are used in the extensions themselves. */ #define PyInt_Type PyLong_Type #define PyInt_AS_LONG PyLong_AS_LONG #endif /* clang-format off */ static const char lowertable[128] = { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07', '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f', '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f', '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27', '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f', '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37', '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f', '\x40', '\x61', '\x62', '\x63', '\x64', '\x65', '\x66', '\x67', /* A-G */ '\x68', '\x69', '\x6a', '\x6b', '\x6c', '\x6d', '\x6e', '\x6f', /* H-O */ '\x70', '\x71', '\x72', '\x73', '\x74', '\x75', '\x76', '\x77', /* P-W */ '\x78', '\x79', '\x7a', /* X-Z */ '\x5b', '\x5c', '\x5d', '\x5e', '\x5f', '\x60', '\x61', '\x62', '\x63', '\x64', '\x65', '\x66', '\x67', '\x68', '\x69', '\x6a', '\x6b', '\x6c', '\x6d', '\x6e', '\x6f', '\x70', '\x71', '\x72', '\x73', '\x74', '\x75', '\x76', '\x77', '\x78', '\x79', '\x7a', '\x7b', '\x7c', '\x7d', '\x7e', '\x7f' }; static const char uppertable[128] = { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07', '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f', '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f', '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27', '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f', '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37', '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f', '\x40', '\x41', '\x42', '\x43', '\x44', '\x45', '\x46', '\x47', '\x48', '\x49', '\x4a', '\x4b', '\x4c', '\x4d', '\x4e', '\x4f', '\x50', '\x51', '\x52', '\x53', '\x54', '\x55', '\x56', '\x57', '\x58', '\x59', '\x5a', '\x5b', '\x5c', '\x5d', '\x5e', '\x5f', '\x60', '\x41', '\x42', '\x43', '\x44', '\x45', '\x46', '\x47', /* a-g */ '\x48', '\x49', '\x4a', '\x4b', '\x4c', '\x4d', '\x4e', '\x4f', /* h-o */ '\x50', '\x51', '\x52', '\x53', '\x54', '\x55', '\x56', '\x57', /* p-w */ '\x58', '\x59', '\x5a', /* x-z */ '\x7b', '\x7c', '\x7d', '\x7e', '\x7f' }; /* clang-format on */ /* 1: no escape, 2: \<c>, 6: \u<x> */ static const uint8_t jsonlentable[256] = { 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 6, 2, 2, 6, 6, /* b, t, n, f, r */ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* " */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, /* \\ */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 6, /* DEL */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, }; static const uint8_t jsonparanoidlentable[128] = { 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 6, 2, 2, 6, 6, /* b, t, n, f, r */ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* " */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 6, 1, 6, 1, /* <, > */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, /* \\ */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 6, /* DEL */ }; static const char hexchartable[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', }; /* * Turn a hex-encoded string into binary. */ PyObject *unhexlify(const char *str, Py_ssize_t len) { PyObject *ret; char *d; Py_ssize_t i; ret = PyBytes_FromStringAndSize(NULL, len / 2); if (!ret) return NULL; d = PyBytes_AsString(ret); for (i = 0; i < len;) { int hi = hexdigit(str, i++); int lo = hexdigit(str, i++); *d++ = (hi << 4) | lo; } return ret; } PyObject *isasciistr(PyObject *self, PyObject *args) { const char *buf; Py_ssize_t i, len; if (!PyArg_ParseTuple(args, "s#:isasciistr", &buf, &len)) return NULL; i = 0; /* char array in PyStringObject should be at least 4-byte aligned */ if (((uintptr_t)buf & 3) == 0) { const uint32_t *p = (const uint32_t *)buf; for (; i < len / 4; i++) { if (p[i] & 0x80808080U) Py_RETURN_FALSE; } i *= 4; } for (; i < len; i++) { if (buf[i] & 0x80) Py_RETURN_FALSE; } Py_RETURN_TRUE; } static inline PyObject *_asciitransform(PyObject *str_obj, const char table[128], PyObject *fallback_fn) { char *str, *newstr; Py_ssize_t i, len; PyObject *newobj = NULL; PyObject *ret = NULL; str = PyBytes_AS_STRING(str_obj); len = PyBytes_GET_SIZE(str_obj); newobj = PyBytes_FromStringAndSize(NULL, len); if (!newobj) goto quit; newstr = PyBytes_AS_STRING(newobj); for (i = 0; i < len; i++) { char c = str[i]; if (c & 0x80) { if (fallback_fn != NULL) { ret = PyObject_CallFunctionObjArgs(fallback_fn, str_obj, NULL); } else { PyObject *err = PyUnicodeDecodeError_Create( "ascii", str, len, i, (i + 1), "unexpected code byte"); PyErr_SetObject(PyExc_UnicodeDecodeError, err); Py_XDECREF(err); } goto quit; } newstr[i] = table[(unsigned char)c]; } ret = newobj; Py_INCREF(ret); quit: Py_XDECREF(newobj); return ret; } PyObject *asciilower(PyObject *self, PyObject *args) { PyObject *str_obj; if (!PyArg_ParseTuple(args, "O!:asciilower", &PyBytes_Type, &str_obj)) return NULL; return _asciitransform(str_obj, lowertable, NULL); } PyObject *asciiupper(PyObject *self, PyObject *args) { PyObject *str_obj; if (!PyArg_ParseTuple(args, "O!:asciiupper", &PyBytes_Type, &str_obj)) return NULL; return _asciitransform(str_obj, uppertable, NULL); } PyObject *make_file_foldmap(PyObject *self, PyObject *args) { PyObject *dmap, *spec_obj, *normcase_fallback; PyObject *file_foldmap = NULL; enum normcase_spec spec; PyObject *k, *v; dirstateTupleObject *tuple; Py_ssize_t pos = 0; const char *table; if (!PyArg_ParseTuple(args, "O!O!O!:make_file_foldmap", &PyDict_Type, &dmap, &PyInt_Type, &spec_obj, &PyFunction_Type, &normcase_fallback)) goto quit; spec = (int)PyInt_AS_LONG(spec_obj); switch (spec) { case NORMCASE_LOWER: table = lowertable; break; case NORMCASE_UPPER: table = uppertable; break; case NORMCASE_OTHER: table = NULL; break; default: PyErr_SetString(PyExc_TypeError, "invalid normcasespec"); goto quit; } /* Add some more entries to deal with additions outside this function. */ file_foldmap = _dict_new_presized((PyDict_Size(dmap) / 10) * 11); if (file_foldmap == NULL) goto quit; while (PyDict_Next(dmap, &pos, &k, &v)) { if (!dirstate_tuple_check(v)) { PyErr_SetString(PyExc_TypeError, "expected a dirstate tuple"); goto quit; } tuple = (dirstateTupleObject *)v; if (tuple->state != 'r') { PyObject *normed; if (table != NULL) { normed = _asciitransform(k, table, normcase_fallback); } else { normed = PyObject_CallFunctionObjArgs( normcase_fallback, k, NULL); } if (normed == NULL) goto quit; if (PyDict_SetItem(file_foldmap, normed, k) == -1) { Py_DECREF(normed); goto quit; } Py_DECREF(normed); } } return file_foldmap; quit: Py_XDECREF(file_foldmap); return NULL; } /* calculate length of JSON-escaped string; returns -1 if unsupported */ static Py_ssize_t jsonescapelen(const char *buf, Py_ssize_t len, bool paranoid) { Py_ssize_t i, esclen = 0; if (paranoid) { /* don't want to process multi-byte escapes in C */ for (i = 0; i < len; i++) { char c = buf[i]; if (c & 0x80) { PyErr_SetString(PyExc_ValueError, "cannot process non-ascii str"); return -1; } esclen += jsonparanoidlentable[(unsigned char)c]; if (esclen < 0) { PyErr_SetString(PyExc_MemoryError, "overflow in jsonescapelen"); return -1; } } } else { for (i = 0; i < len; i++) { char c = buf[i]; esclen += jsonlentable[(unsigned char)c]; if (esclen < 0) { PyErr_SetString(PyExc_MemoryError, "overflow in jsonescapelen"); return -1; } } } return esclen; } /* map '\<c>' escape character */ static char jsonescapechar2(char c) { switch (c) { case '\b': return 'b'; case '\t': return 't'; case '\n': return 'n'; case '\f': return 'f'; case '\r': return 'r'; case '"': return '"'; case '\\': return '\\'; } return '\0'; /* should not happen */ } /* convert 'origbuf' to JSON-escaped form 'escbuf'; 'origbuf' should only include characters mappable by json(paranoid)lentable */ static void encodejsonescape(char *escbuf, Py_ssize_t esclen, const char *origbuf, Py_ssize_t origlen, bool paranoid) { const uint8_t *lentable = (paranoid) ? jsonparanoidlentable : jsonlentable; Py_ssize_t i, j; for (i = 0, j = 0; i < origlen; i++) { char c = origbuf[i]; uint8_t l = lentable[(unsigned char)c]; assert(j + l <= esclen); switch (l) { case 1: escbuf[j] = c; break; case 2: escbuf[j] = '\\'; escbuf[j + 1] = jsonescapechar2(c); break; case 6: memcpy(escbuf + j, "\\u00", 4); escbuf[j + 4] = hexchartable[(unsigned char)c >> 4]; escbuf[j + 5] = hexchartable[(unsigned char)c & 0xf]; break; } j += l; } } PyObject *jsonescapeu8fast(PyObject *self, PyObject *args) { PyObject *origstr, *escstr; const char *origbuf; Py_ssize_t origlen, esclen; int paranoid; if (!PyArg_ParseTuple(args, "O!i:jsonescapeu8fast", &PyBytes_Type, &origstr, ¶noid)) return NULL; origbuf = PyBytes_AS_STRING(origstr); origlen = PyBytes_GET_SIZE(origstr); esclen = jsonescapelen(origbuf, origlen, paranoid); if (esclen < 0) return NULL; /* unsupported char found or overflow */ if (origlen == esclen) { Py_INCREF(origstr); return origstr; } escstr = PyBytes_FromStringAndSize(NULL, esclen); if (!escstr) return NULL; encodejsonescape(PyBytes_AS_STRING(escstr), esclen, origbuf, origlen, paranoid); return escstr; }