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https://github.com/python/cpython.git
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contains a ``coding:`` header: the wrong line was displayed, and the encoding was not respected. Patch by Victor Stinner.
This commit is contained in:
Amaury Forgeot d'Arc
parent
76e5538749
commit
cf8016a8d6
4 changed files with 220 additions and 83 deletions
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@ -8,9 +8,15 @@
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#include "structmember.h"
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#include "osdefs.h"
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#include "traceback.h"
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#define OFF(x) offsetof(PyTracebackObject, x)
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/* Method from Parser/tokenizer.c */
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extern char * PyTokenizer_FindEncoding(int);
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static PyObject *
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tb_dir(PyTracebackObject *self)
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{
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@ -128,102 +134,156 @@ PyTraceBack_Here(PyFrameObject *frame)
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return 0;
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}
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static int
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_Py_FindSourceFile(const char* filename, char* namebuf, size_t namelen, int open_flags)
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{
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int i;
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int fd = -1;
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PyObject *v;
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Py_ssize_t _npath;
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int npath;
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size_t taillen;
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PyObject *syspath;
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const char* path;
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const char* tail;
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Py_ssize_t len;
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/* Search tail of filename in sys.path before giving up */
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tail = strrchr(filename, SEP);
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if (tail == NULL)
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tail = filename;
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else
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tail++;
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taillen = strlen(tail);
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syspath = PySys_GetObject("path");
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if (syspath == NULL || !PyList_Check(syspath))
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return -1;
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_npath = PyList_Size(syspath);
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npath = Py_SAFE_DOWNCAST(_npath, Py_ssize_t, int);
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for (i = 0; i < npath; i++) {
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v = PyList_GetItem(syspath, i);
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if (v == NULL) {
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PyErr_Clear();
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break;
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}
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if (!PyUnicode_Check(v))
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continue;
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path = _PyUnicode_AsStringAndSize(v, &len);
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if (len + 1 + taillen >= (Py_ssize_t)namelen - 1)
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continue; /* Too long */
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strcpy(namebuf, path);
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if (strlen(namebuf) != len)
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continue; /* v contains '\0' */
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if (len > 0 && namebuf[len-1] != SEP)
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namebuf[len++] = SEP;
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strcpy(namebuf+len, tail);
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Py_BEGIN_ALLOW_THREADS
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fd = open(namebuf, open_flags);
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Py_END_ALLOW_THREADS
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if (0 <= fd) {
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return fd;
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}
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}
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return -1;
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}
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int
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_Py_DisplaySourceLine(PyObject *f, const char *filename, int lineno, int indent)
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{
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int err = 0;
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FILE *xfp = NULL;
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char linebuf[2000];
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int fd;
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int i;
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char namebuf[MAXPATHLEN+1];
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char *found_encoding;
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char *encoding;
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PyObject *fob = NULL;
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PyObject *lineobj = NULL;
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#ifdef O_BINARY
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const int open_flags = O_RDONLY | O_BINARY; /* necessary for Windows */
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#else
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const int open_flags = O_RDONLY;
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#endif
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char buf[MAXPATHLEN+1];
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Py_UNICODE *u, *p;
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Py_ssize_t len;
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/* open the file */
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if (filename == NULL)
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return -1;
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xfp = fopen(filename, "r" PY_STDIOTEXTMODE);
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if (xfp == NULL) {
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/* Search tail of filename in sys.path before giving up */
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PyObject *path;
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const char *tail = strrchr(filename, SEP);
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if (tail == NULL)
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tail = filename;
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else
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tail++;
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path = PySys_GetObject("path");
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if (path != NULL && PyList_Check(path)) {
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Py_ssize_t _npath = PyList_Size(path);
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int npath = Py_SAFE_DOWNCAST(_npath, Py_ssize_t, int);
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size_t taillen = strlen(tail);
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for (i = 0; i < npath; i++) {
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PyObject *v = PyList_GetItem(path, i);
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if (v == NULL) {
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PyErr_Clear();
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break;
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}
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if (PyBytes_Check(v)) {
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size_t len;
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len = PyBytes_GET_SIZE(v);
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if (len + 1 + taillen >= MAXPATHLEN)
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continue; /* Too long */
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strcpy(namebuf, PyBytes_AsString(v));
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if (strlen(namebuf) != len)
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continue; /* v contains '\0' */
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if (len > 0 && namebuf[len-1] != SEP)
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namebuf[len++] = SEP;
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strcpy(namebuf+len, tail);
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xfp = fopen(namebuf, "r" PY_STDIOTEXTMODE);
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if (xfp != NULL) {
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filename = namebuf;
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break;
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}
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}
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}
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}
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return 0;
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Py_BEGIN_ALLOW_THREADS
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fd = open(filename, open_flags);
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Py_END_ALLOW_THREADS
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if (fd < 0) {
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fd = _Py_FindSourceFile(filename, buf, sizeof(buf), open_flags);
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if (fd < 0)
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return 0;
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filename = buf;
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}
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if (xfp == NULL)
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return err;
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if (err != 0) {
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fclose(xfp);
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return err;
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}
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/* use the right encoding to decode the file as unicode */
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found_encoding = PyTokenizer_FindEncoding(fd);
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encoding = (found_encoding != NULL) ? found_encoding :
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(char*)PyUnicode_GetDefaultEncoding();
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lseek(fd, 0, 0); /* Reset position */
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fob = PyFile_FromFd(fd, (char*)filename, "r", -1, (char*)encoding,
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NULL, NULL, 1);
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PyMem_FREE(found_encoding);
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if (fob == NULL) {
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PyErr_Clear();
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close(fd);
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return 0;
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}
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/* get the line number lineno */
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for (i = 0; i < lineno; i++) {
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char* pLastChar = &linebuf[sizeof(linebuf)-2];
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do {
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*pLastChar = '\0';
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if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, xfp, NULL) == NULL)
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break;
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/* fgets read *something*; if it didn't get as
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far as pLastChar, it must have found a newline
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or hit the end of the file; if pLastChar is \n,
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it obviously found a newline; else we haven't
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yet seen a newline, so must continue */
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} while (*pLastChar != '\0' && *pLastChar != '\n');
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}
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if (i == lineno) {
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char buf[11];
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char *p = linebuf;
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while (*p == ' ' || *p == '\t' || *p == '\014')
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p++;
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/* Write some spaces before the line */
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strcpy(buf, " ");
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assert (strlen(buf) == 10);
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while (indent > 0) {
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if(indent < 10)
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buf[indent] = '\0';
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err = PyFile_WriteString(buf, f);
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if (err != 0)
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break;
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indent -= 10;
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Py_XDECREF(lineobj);
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lineobj = PyFile_GetLine(fob, -1);
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if (!lineobj) {
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err = -1;
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break;
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}
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if (err == 0)
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err = PyFile_WriteString(p, f);
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if (err == 0 && strchr(p, '\n') == NULL)
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err = PyFile_WriteString("\n", f);
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}
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fclose(xfp);
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Py_DECREF(fob);
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if (!lineobj || !PyUnicode_Check(lineobj)) {
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Py_XDECREF(lineobj);
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return err;
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}
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/* remove the indentation of the line */
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u = PyUnicode_AS_UNICODE(lineobj);
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len = PyUnicode_GET_SIZE(lineobj);
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for (p=u; *p == ' ' || *p == '\t' || *p == '\014'; p++)
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len--;
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if (u != p) {
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PyObject *truncated;
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truncated = PyUnicode_FromUnicode(p, len);
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if (truncated) {
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Py_DECREF(lineobj);
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lineobj = truncated;
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} else {
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PyErr_Clear();
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}
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}
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/* Write some spaces before the line */
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strcpy(buf, " ");
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assert (strlen(buf) == 10);
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while (indent > 0) {
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if(indent < 10)
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buf[indent] = '\0';
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err = PyFile_WriteString(buf, f);
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if (err != 0)
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break;
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indent -= 10;
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}
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/* finally display the line */
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if (err == 0)
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err = PyFile_WriteObject(lineobj, f, Py_PRINT_RAW);
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Py_DECREF(lineobj);
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if (err == 0)
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err = PyFile_WriteString("\n", f);
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return err;
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}
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