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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI or Corporation for National Research Initiatives or
- CNRI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior
- permission.
-
- While CWI is the initial source for this software, a modified version
- is made available by the Corporation for National Research Initiatives
- (CNRI) at the Internet address ftp://ftp.python.org.
-
- STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
- CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
- DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* String object implementation */
-
- #include "Python.h"
-
- #include "mymath.h"
- #include <ctype.h>
-
- #ifdef COUNT_ALLOCS
- int null_strings, one_strings;
- #endif
-
- #ifdef HAVE_LIMITS_H
- #include <limits.h>
- #else
- #ifndef UCHAR_MAX
- #define UCHAR_MAX 255
- #endif
- #endif
-
- #include "protos/stringobject.h"
-
- static PyStringObject *characters[UCHAR_MAX + 1];
- #ifndef DONT_SHARE_SHORT_STRINGS
- static PyStringObject *nullstring;
- #endif
-
- /*
- Newsizedstringobject() and newstringobject() try in certain cases
- to share string objects. When the size of the string is zero,
- these routines always return a pointer to the same string object;
- when the size is one, they return a pointer to an already existing
- object if the contents of the string is known. For
- newstringobject() this is always the case, for
- newsizedstringobject() this is the case when the first argument in
- not NULL.
- A common practice to allocate a string and then fill it in or
- change it must be done carefully. It is only allowed to change the
- contents of the string if the obect was gotten from
- newsizedstringobject() with a NULL first argument, because in the
- future these routines may try to do even more sharing of objects.
- */
- PyObject *
- PyString_FromStringAndSize(str, size)
- const char *str;
- int size;
- {
- register PyStringObject *op;
- #ifndef DONT_SHARE_SHORT_STRINGS
- if (size == 0 && (op = nullstring) != NULL) {
- #ifdef COUNT_ALLOCS
- null_strings++;
- #endif
- Py_INCREF(op);
- return (PyObject *)op;
- }
- if (size == 1 && str != NULL &&
- (op = characters[*str & UCHAR_MAX]) != NULL)
- {
- #ifdef COUNT_ALLOCS
- one_strings++;
- #endif
- Py_INCREF(op);
- return (PyObject *)op;
- }
- #endif /* DONT_SHARE_SHORT_STRINGS */
- op = (PyStringObject *)
- malloc(sizeof(PyStringObject) + size * sizeof(char));
- if (op == NULL)
- return PyErr_NoMemory();
- op->ob_type = &PyString_Type;
- op->ob_size = size;
- #ifdef CACHE_HASH
- op->ob_shash = -1;
- #endif
- #ifdef INTERN_STRINGS
- op->ob_sinterned = NULL;
- #endif
- _Py_NewReference(op);
- if (str != NULL)
- memcpy(op->ob_sval, str, size);
- op->ob_sval[size] = '\0';
- #ifndef DONT_SHARE_SHORT_STRINGS
- if (size == 0) {
- nullstring = op;
- Py_INCREF(op);
- } else if (size == 1 && str != NULL) {
- characters[*str & UCHAR_MAX] = op;
- Py_INCREF(op);
- }
- #endif
- return (PyObject *) op;
- }
-
- PyObject *
- PyString_FromString(str)
- const char *str;
- {
- register unsigned int size = strlen(str);
- register PyStringObject *op;
- #ifndef DONT_SHARE_SHORT_STRINGS
- if (size == 0 && (op = nullstring) != NULL) {
- #ifdef COUNT_ALLOCS
- null_strings++;
- #endif
- Py_INCREF(op);
- return (PyObject *)op;
- }
- if (size == 1 && (op = characters[*str & UCHAR_MAX]) != NULL) {
- #ifdef COUNT_ALLOCS
- one_strings++;
- #endif
- Py_INCREF(op);
- return (PyObject *)op;
- }
- #endif /* DONT_SHARE_SHORT_STRINGS */
- op = (PyStringObject *)
- malloc(sizeof(PyStringObject) + size * sizeof(char));
- if (op == NULL)
- return PyErr_NoMemory();
- op->ob_type = &PyString_Type;
- op->ob_size = size;
- #ifdef CACHE_HASH
- op->ob_shash = -1;
- #endif
- #ifdef INTERN_STRINGS
- op->ob_sinterned = NULL;
- #endif
- _Py_NewReference(op);
- strcpy(op->ob_sval, str);
- #ifndef DONT_SHARE_SHORT_STRINGS
- if (size == 0) {
- nullstring = op;
- Py_INCREF(op);
- } else if (size == 1) {
- characters[*str & UCHAR_MAX] = op;
- Py_INCREF(op);
- }
- #endif
- return (PyObject *) op;
- }
-
- static void
- string_dealloc(op)
- PyObject *op;
- {
- PyMem_DEL(op);
- }
-
- int
- PyString_Size(op)
- register PyObject *op;
- {
- if (!PyString_Check(op)) {
- PyErr_BadInternalCall();
- return -1;
- }
- return ((PyStringObject *)op) -> ob_size;
- }
-
- /*const*/ char *
- PyString_AsString(op)
- register PyObject *op;
- {
- if (!PyString_Check(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- return ((PyStringObject *)op) -> ob_sval;
- }
-
- /* Methods */
-
- static int
- string_print(op, fp, flags)
- PyStringObject *op;
- FILE *fp;
- int flags;
- {
- int i;
- char c;
- int quote;
- /* XXX Ought to check for interrupts when writing long strings */
- if (flags & Py_PRINT_RAW) {
- fwrite(op->ob_sval, 1, (int) op->ob_size, fp);
- return 0;
- }
-
- /* figure out which quote to use; single is prefered */
- quote = '\'';
- if (strchr(op->ob_sval, '\'') && !strchr(op->ob_sval, '"'))
- quote = '"';
-
- fputc(quote, fp);
- for (i = 0; i < op->ob_size; i++) {
- c = op->ob_sval[i];
- if (c == quote || c == '\\')
- fprintf(fp, "\\%c", c);
- else if (c < ' ' || c >= 0177)
- fprintf(fp, "\\%03o", c & 0377);
- else
- fputc(c, fp);
- }
- fputc(quote, fp);
- return 0;
- }
-
- static PyObject *
- string_repr(op)
- register PyStringObject *op;
- {
- /* XXX overflow? */
- int newsize = 2 + 4 * op->ob_size * sizeof(char);
- PyObject *v = PyString_FromStringAndSize((char *)NULL, newsize);
- if (v == NULL) {
- return NULL;
- }
- else {
- register int i;
- register char c;
- register char *p;
- int quote;
-
- /* figure out which quote to use; single is prefered */
- quote = '\'';
- if (strchr(op->ob_sval, '\'') && !strchr(op->ob_sval, '"'))
- quote = '"';
-
- p = ((PyStringObject *)v)->ob_sval;
- *p++ = quote;
- for (i = 0; i < op->ob_size; i++) {
- c = op->ob_sval[i];
- if (c == quote || c == '\\')
- *p++ = '\\', *p++ = c;
- else if (c < ' ' || c >= 0177) {
- sprintf(p, "\\%03o", c & 0377);
- while (*p != '\0')
- p++;
- }
- else
- *p++ = c;
- }
- *p++ = quote;
- *p = '\0';
- _PyString_Resize(
- &v, (int) (p - ((PyStringObject *)v)->ob_sval));
- return v;
- }
- }
-
- static int
- string_length(a)
- PyStringObject *a;
- {
- return a->ob_size;
- }
-
- static PyObject *
- string_concat(a, bb)
- register PyStringObject *a;
- register PyObject *bb;
- {
- register unsigned int size;
- register PyStringObject *op;
- if (!PyString_Check(bb)) {
- PyErr_BadArgument();
- return NULL;
- }
- #define b ((PyStringObject *)bb)
- /* Optimize cases with empty left or right operand */
- if (a->ob_size == 0) {
- Py_INCREF(bb);
- return bb;
- }
- if (b->ob_size == 0) {
- Py_INCREF(a);
- return (PyObject *)a;
- }
- size = a->ob_size + b->ob_size;
- op = (PyStringObject *)
- malloc(sizeof(PyStringObject) + size * sizeof(char));
- if (op == NULL)
- return PyErr_NoMemory();
- op->ob_type = &PyString_Type;
- op->ob_size = size;
- #ifdef CACHE_HASH
- op->ob_shash = -1;
- #endif
- #ifdef INTERN_STRINGS
- op->ob_sinterned = NULL;
- #endif
- _Py_NewReference(op);
- memcpy(op->ob_sval, a->ob_sval, (int) a->ob_size);
- memcpy(op->ob_sval + a->ob_size, b->ob_sval, (int) b->ob_size);
- op->ob_sval[size] = '\0';
- return (PyObject *) op;
- #undef b
- }
-
- static PyObject *
- string_repeat(a, n)
- register PyStringObject *a;
- register int n;
- {
- register int i;
- register int size;
- register PyStringObject *op;
- if (n < 0)
- n = 0;
- size = a->ob_size * n;
- if (size == a->ob_size) {
- Py_INCREF(a);
- return (PyObject *)a;
- }
- op = (PyStringObject *)
- malloc(sizeof(PyStringObject) + size * sizeof(char));
- if (op == NULL)
- return PyErr_NoMemory();
- op->ob_type = &PyString_Type;
- op->ob_size = size;
- #ifdef CACHE_HASH
- op->ob_shash = -1;
- #endif
- #ifdef INTERN_STRINGS
- op->ob_sinterned = NULL;
- #endif
- _Py_NewReference(op);
- for (i = 0; i < size; i += a->ob_size)
- memcpy(op->ob_sval+i, a->ob_sval, (int) a->ob_size);
- op->ob_sval[size] = '\0';
- return (PyObject *) op;
- }
-
- /* String slice a[i:j] consists of characters a[i] ... a[j-1] */
-
- static PyObject *
- string_slice(a, i, j)
- register PyStringObject *a;
- register int i, j; /* May be negative! */
- {
- if (i < 0)
- i = 0;
- if (j < 0)
- j = 0; /* Avoid signed/unsigned bug in next line */
- if (j > a->ob_size)
- j = a->ob_size;
- if (i == 0 && j == a->ob_size) { /* It's the same as a */
- Py_INCREF(a);
- return (PyObject *)a;
- }
- if (j < i)
- j = i;
- return PyString_FromStringAndSize(a->ob_sval + i, (int) (j-i));
- }
-
- static PyObject *
- string_item(a, i)
- PyStringObject *a;
- register int i;
- {
- int c;
- PyObject *v;
- if (i < 0 || i >= a->ob_size) {
- PyErr_SetString(PyExc_IndexError, "string index out of range");
- return NULL;
- }
- c = a->ob_sval[i] & UCHAR_MAX;
- v = (PyObject *) characters[c];
- #ifdef COUNT_ALLOCS
- if (v != NULL)
- one_strings++;
- #endif
- if (v == NULL) {
- v = PyString_FromStringAndSize((char *)NULL, 1);
- if (v == NULL)
- return NULL;
- characters[c] = (PyStringObject *) v;
- ((PyStringObject *)v)->ob_sval[0] = c;
- }
- Py_INCREF(v);
- return v;
- }
-
- static int
- string_compare(a, b)
- PyStringObject *a, *b;
- {
- int len_a = a->ob_size, len_b = b->ob_size;
- int min_len = (len_a < len_b) ? len_a : len_b;
- int cmp;
- if (min_len > 0) {
- cmp = Py_CHARMASK(*a->ob_sval) - Py_CHARMASK(*b->ob_sval);
- if (cmp == 0)
- cmp = memcmp(a->ob_sval, b->ob_sval, min_len);
- if (cmp != 0)
- return cmp;
- }
- return (len_a < len_b) ? -1 : (len_a > len_b) ? 1 : 0;
- }
-
- static long
- string_hash(a)
- PyStringObject *a;
- {
- register int len;
- register unsigned char *p;
- register long x;
-
- #ifdef CACHE_HASH
- if (a->ob_shash != -1)
- return a->ob_shash;
- #ifdef INTERN_STRINGS
- if (a->ob_sinterned != NULL)
- return (a->ob_shash =
- ((PyStringObject *)(a->ob_sinterned))->ob_shash);
- #endif
- #endif
- len = a->ob_size;
- p = (unsigned char *) a->ob_sval;
- x = *p << 7;
- while (--len >= 0)
- x = (1000003*x) ^ *p++;
- x ^= a->ob_size;
- if (x == -1)
- x = -2;
- #ifdef CACHE_HASH
- a->ob_shash = x;
- #endif
- return x;
- }
-
- static int
- string_buffer_getreadbuf(self, index, ptr)
- PyStringObject *self;
- int index;
- const void **ptr;
- {
- if ( index != 0 ) {
- PyErr_SetString(PyExc_SystemError,
- "accessing non-existent string segment");
- return -1;
- }
- *ptr = (void *)self->ob_sval;
- return self->ob_size;
- }
-
- static int
- string_buffer_getwritebuf(self, index, ptr)
- PyStringObject *self;
- int index;
- const void **ptr;
- {
- PyErr_SetString(PyExc_TypeError,
- "Cannot use string as modifiable buffer");
- return -1;
- }
-
- static int
- string_buffer_getsegcount(self, lenp)
- PyStringObject *self;
- int *lenp;
- {
- if ( lenp )
- *lenp = self->ob_size;
- return 1;
- }
-
- static int
- string_buffer_getcharbuf(self, index, ptr)
- PyStringObject *self;
- int index;
- const char **ptr;
- {
- if ( index != 0 ) {
- PyErr_SetString(PyExc_SystemError,
- "accessing non-existent string segment");
- return -1;
- }
- *ptr = self->ob_sval;
- return self->ob_size;
- }
-
- static PySequenceMethods string_as_sequence = {
- (inquiry)string_length, /*sq_length*/
- (binaryfunc)string_concat, /*sq_concat*/
- (intargfunc)string_repeat, /*sq_repeat*/
- (intargfunc)string_item, /*sq_item*/
- (intintargfunc)string_slice, /*sq_slice*/
- 0, /*sq_ass_item*/
- 0, /*sq_ass_slice*/
- };
-
- static PyBufferProcs string_as_buffer = {
- (getreadbufferproc)string_buffer_getreadbuf,
- (getwritebufferproc)string_buffer_getwritebuf,
- (getsegcountproc)string_buffer_getsegcount,
- (getcharbufferproc)string_buffer_getcharbuf,
- };
-
- PyTypeObject PyString_Type = {
- PyObject_HEAD_INIT(&PyType_Type)
- 0,
- "string",
- sizeof(PyStringObject),
- sizeof(char),
- (destructor)string_dealloc, /*tp_dealloc*/
- (printfunc)string_print, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- (cmpfunc)string_compare, /*tp_compare*/
- (reprfunc)string_repr, /*tp_repr*/
- 0, /*tp_as_number*/
- &string_as_sequence, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- (hashfunc)string_hash, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- &string_as_buffer, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT, /*tp_flags*/
- 0, /*tp_doc*/
- };
-
- void
- PyString_Concat(pv, w)
- register PyObject **pv;
- register PyObject *w;
- {
- register PyObject *v;
- if (*pv == NULL)
- return;
- if (w == NULL || !PyString_Check(*pv)) {
- Py_DECREF(*pv);
- *pv = NULL;
- return;
- }
- v = string_concat((PyStringObject *) *pv, w);
- Py_DECREF(*pv);
- *pv = v;
- }
-
- void
- PyString_ConcatAndDel(pv, w)
- register PyObject **pv;
- register PyObject *w;
- {
- PyString_Concat(pv, w);
- Py_XDECREF(w);
- }
-
-
- /* The following function breaks the notion that strings are immutable:
- it changes the size of a string. We get away with this only if there
- is only one module referencing the object. You can also think of it
- as creating a new string object and destroying the old one, only
- more efficiently. In any case, don't use this if the string may
- already be known to some other part of the code... */
-
- int
- _PyString_Resize(pv, newsize)
- PyObject **pv;
- int newsize;
- {
- register PyObject *v;
- register PyStringObject *sv;
- v = *pv;
- if (!PyString_Check(v) || v->ob_refcnt != 1) {
- *pv = 0;
- Py_DECREF(v);
- PyErr_BadInternalCall();
- return -1;
- }
- /* XXX UNREF/NEWREF interface should be more symmetrical */
- #ifdef Py_REF_DEBUG
- --_Py_RefTotal;
- #endif
- _Py_ForgetReference(v);
- *pv = (PyObject *)
- realloc((char *)v,
- sizeof(PyStringObject) + newsize * sizeof(char));
- if (*pv == NULL) {
- PyMem_DEL(v);
- PyErr_NoMemory();
- return -1;
- }
- _Py_NewReference(*pv);
- sv = (PyStringObject *) *pv;
- sv->ob_size = newsize;
- sv->ob_sval[newsize] = '\0';
- return 0;
- }
-
- /* Helpers for formatstring */
-
- static PyObject *
- getnextarg(args, arglen, p_argidx)
- PyObject *args;
- int arglen;
- int *p_argidx;
- {
- int argidx = *p_argidx;
- if (argidx < arglen) {
- (*p_argidx)++;
- if (arglen < 0)
- return args;
- else
- return PyTuple_GetItem(args, argidx);
- }
- PyErr_SetString(PyExc_TypeError,
- "not enough arguments for format string");
- return NULL;
- }
-
- #define F_LJUST (1<<0)
- #define F_SIGN (1<<1)
- #define F_BLANK (1<<2)
- #define F_ALT (1<<3)
- #define F_ZERO (1<<4)
-
- static int
- formatfloat(buf, flags, prec, type, v)
- char *buf;
- int flags;
- int prec;
- int type;
- PyObject *v;
- {
- char fmt[20];
- double x;
- if (!PyArg_Parse(v, "d;float argument required", &x))
- return -1;
- if (prec < 0)
- prec = 6;
- if (prec > 50)
- prec = 50; /* Arbitrary limitation */
- if (type == 'f' && fabs(x)/1e25 >= 1e25)
- type = 'g';
- sprintf(fmt, "%%%s.%d%c", (flags&F_ALT) ? "#" : "", prec, type);
- sprintf(buf, fmt, x);
- return strlen(buf);
- }
-
- static int
- formatint(buf, flags, prec, type, v)
- char *buf;
- int flags;
- int prec;
- int type;
- PyObject *v;
- {
- char fmt[20];
- long x;
- if (!PyArg_Parse(v, "l;int argument required", &x))
- return -1;
- if (prec < 0)
- prec = 1;
- sprintf(fmt, "%%%s.%dl%c", (flags&F_ALT) ? "#" : "", prec, type);
- sprintf(buf, fmt, x);
- return strlen(buf);
- }
-
- static int
- formatchar(buf, v)
- char *buf;
- PyObject *v;
- {
- if (PyString_Check(v)) {
- if (!PyArg_Parse(v, "c;%c requires int or char", &buf[0]))
- return -1;
- }
- else {
- if (!PyArg_Parse(v, "b;%c requires int or char", &buf[0]))
- return -1;
- }
- buf[1] = '\0';
- return 1;
- }
-
-
- /* fmt%(v1,v2,...) is roughly equivalent to sprintf(fmt, v1, v2, ...) */
-
- PyObject *
- PyString_Format(format, args)
- PyObject *format;
- PyObject *args;
- {
- char *fmt, *res;
- int fmtcnt, rescnt, reslen, arglen, argidx;
- int args_owned = 0;
- PyObject *result;
- PyObject *dict = NULL;
- if (format == NULL || !PyString_Check(format) || args == NULL) {
- PyErr_BadInternalCall();
- return NULL;
- }
- fmt = PyString_AsString(format);
- fmtcnt = PyString_Size(format);
- reslen = rescnt = fmtcnt + 100;
- result = PyString_FromStringAndSize((char *)NULL, reslen);
- if (result == NULL)
- return NULL;
- res = PyString_AsString(result);
- if (PyTuple_Check(args)) {
- arglen = PyTuple_Size(args);
- argidx = 0;
- }
- else {
- arglen = -1;
- argidx = -2;
- }
- if (args->ob_type->tp_as_mapping)
- dict = args;
- while (--fmtcnt >= 0) {
- if (*fmt != '%') {
- if (--rescnt < 0) {
- rescnt = fmtcnt + 100;
- reslen += rescnt;
- if (_PyString_Resize(&result, reslen) < 0)
- return NULL;
- res = PyString_AsString(result)
- + reslen - rescnt;
- --rescnt;
- }
- *res++ = *fmt++;
- }
- else {
- /* Got a format specifier */
- int flags = 0;
- int width = -1;
- int prec = -1;
- int size = 0;
- int c = '\0';
- int fill;
- PyObject *v = NULL;
- PyObject *temp = NULL;
- char *buf;
- int sign;
- int len;
- char tmpbuf[120]; /* For format{float,int,char}() */
- fmt++;
- if (*fmt == '(') {
- char *keystart;
- int keylen;
- PyObject *key;
- int pcount = 1;
-
- if (dict == NULL) {
- PyErr_SetString(PyExc_TypeError,
- "format requires a mapping");
- goto error;
- }
- ++fmt;
- --fmtcnt;
- keystart = fmt;
- /* Skip over balanced parentheses */
- while (pcount > 0 && --fmtcnt >= 0) {
- if (*fmt == ')')
- --pcount;
- else if (*fmt == '(')
- ++pcount;
- fmt++;
- }
- keylen = fmt - keystart - 1;
- if (fmtcnt < 0 || pcount > 0) {
- PyErr_SetString(PyExc_ValueError,
- "incomplete format key");
- goto error;
- }
- key = PyString_FromStringAndSize(keystart,
- keylen);
- if (key == NULL)
- goto error;
- if (args_owned) {
- Py_DECREF(args);
- args_owned = 0;
- }
- args = PyObject_GetItem(dict, key);
- Py_DECREF(key);
- if (args == NULL) {
- goto error;
- }
- args_owned = 1;
- arglen = -1;
- argidx = -2;
- }
- while (--fmtcnt >= 0) {
- switch (c = *fmt++) {
- case '-': flags |= F_LJUST; continue;
- case '+': flags |= F_SIGN; continue;
- case ' ': flags |= F_BLANK; continue;
- case '#': flags |= F_ALT; continue;
- case '0': flags |= F_ZERO; continue;
- }
- break;
- }
- if (c == '*') {
- v = getnextarg(args, arglen, &argidx);
- if (v == NULL)
- goto error;
- if (!PyInt_Check(v)) {
- PyErr_SetString(PyExc_TypeError,
- "* wants int");
- goto error;
- }
- width = PyInt_AsLong(v);
- if (width < 0)
- width = 0;
- if (--fmtcnt >= 0)
- c = *fmt++;
- }
- else if (c >= 0 && isdigit(c)) {
- width = c - '0';
- while (--fmtcnt >= 0) {
- c = Py_CHARMASK(*fmt++);
- if (!isdigit(c))
- break;
- if ((width*10) / 10 != width) {
- PyErr_SetString(
- PyExc_ValueError,
- "width too big");
- goto error;
- }
- width = width*10 + (c - '0');
- }
- }
- if (c == '.') {
- prec = 0;
- if (--fmtcnt >= 0)
- c = *fmt++;
- if (c == '*') {
- v = getnextarg(args, arglen, &argidx);
- if (v == NULL)
- goto error;
- if (!PyInt_Check(v)) {
- PyErr_SetString(
- PyExc_TypeError,
- "* wants int");
- goto error;
- }
- prec = PyInt_AsLong(v);
- if (prec < 0)
- prec = 0;
- if (--fmtcnt >= 0)
- c = *fmt++;
- }
- else if (c >= 0 && isdigit(c)) {
- prec = c - '0';
- while (--fmtcnt >= 0) {
- c = Py_CHARMASK(*fmt++);
- if (!isdigit(c))
- break;
- if ((prec*10) / 10 != prec) {
- PyErr_SetString(
- PyExc_ValueError,
- "prec too big");
- goto error;
- }
- prec = prec*10 + (c - '0');
- }
- }
- } /* prec */
- if (fmtcnt >= 0) {
- if (c == 'h' || c == 'l' || c == 'L') {
- size = c;
- if (--fmtcnt >= 0)
- c = *fmt++;
- }
- }
- if (fmtcnt < 0) {
- PyErr_SetString(PyExc_ValueError,
- "incomplete format");
- goto error;
- }
- if (c != '%') {
- v = getnextarg(args, arglen, &argidx);
- if (v == NULL)
- goto error;
- }
- sign = 0;
- fill = ' ';
- switch (c) {
- case '%':
- buf = "%";
- len = 1;
- break;
- case 's':
- temp = PyObject_Str(v);
- if (temp == NULL)
- goto error;
- if (!PyString_Check(temp)) {
- PyErr_SetString(PyExc_TypeError,
- "%s argument has non-string str()");
- goto error;
- }
- buf = PyString_AsString(temp);
- len = PyString_Size(temp);
- if (prec >= 0 && len > prec)
- len = prec;
- break;
- case 'i':
- case 'd':
- case 'u':
- case 'o':
- case 'x':
- case 'X':
- if (c == 'i')
- c = 'd';
- buf = tmpbuf;
- len = formatint(buf, flags, prec, c, v);
- if (len < 0)
- goto error;
- sign = (c == 'd');
- if (flags&F_ZERO) {
- fill = '0';
- if ((flags&F_ALT) &&
- (c == 'x' || c == 'X') &&
- buf[0] == '0' && buf[1] == c) {
- *res++ = *buf++;
- *res++ = *buf++;
- rescnt -= 2;
- len -= 2;
- width -= 2;
- if (width < 0)
- width = 0;
- }
- }
- break;
- case 'e':
- case 'E':
- case 'f':
- case 'g':
- case 'G':
- buf = tmpbuf;
- len = formatfloat(buf, flags, prec, c, v);
- if (len < 0)
- goto error;
- sign = 1;
- if (flags&F_ZERO)
- fill = '0';
- break;
- case 'c':
- buf = tmpbuf;
- len = formatchar(buf, v);
- if (len < 0)
- goto error;
- break;
- default:
- PyErr_Format(PyExc_ValueError,
- "unsupported format character '%c' (0x%x)",
- c, c);
- goto error;
- }
- if (sign) {
- if (*buf == '-' || *buf == '+') {
- sign = *buf++;
- len--;
- }
- else if (flags & F_SIGN)
- sign = '+';
- else if (flags & F_BLANK)
- sign = ' ';
- else
- sign = '\0';
- }
- if (width < len)
- width = len;
- if (rescnt < width + (sign != '\0')) {
- reslen -= rescnt;
- rescnt = width + fmtcnt + 100;
- reslen += rescnt;
- if (_PyString_Resize(&result, reslen) < 0)
- return NULL;
- res = PyString_AsString(result)
- + reslen - rescnt;
- }
- if (sign) {
- if (fill != ' ')
- *res++ = sign;
- rescnt--;
- if (width > len)
- width--;
- }
- if (width > len && !(flags&F_LJUST)) {
- do {
- --rescnt;
- *res++ = fill;
- } while (--width > len);
- }
- if (sign && fill == ' ')
- *res++ = sign;
- memcpy(res, buf, len);
- res += len;
- rescnt -= len;
- while (--width >= len) {
- --rescnt;
- *res++ = ' ';
- }
- if (dict && (argidx < arglen) && c != '%') {
- PyErr_SetString(PyExc_TypeError,
- "not all arguments converted");
- goto error;
- }
- Py_XDECREF(temp);
- } /* '%' */
- } /* until end */
- if (argidx < arglen && !dict) {
- PyErr_SetString(PyExc_TypeError,
- "not all arguments converted");
- goto error;
- }
- if (args_owned) {
- Py_DECREF(args);
- }
- _PyString_Resize(&result, reslen - rescnt);
- return result;
- error:
- Py_DECREF(result);
- if (args_owned) {
- Py_DECREF(args);
- }
- return NULL;
- }
-
-
- #ifdef INTERN_STRINGS
-
- static PyObject *interned;
-
- void
- PyString_InternInPlace(p)
- PyObject **p;
- {
- register PyStringObject *s = (PyStringObject *)(*p);
- PyObject *t;
- if (s == NULL || !PyString_Check(s))
- Py_FatalError("PyString_InternInPlace: strings only please!");
- if ((t = s->ob_sinterned) != NULL) {
- if (t == (PyObject *)s)
- return;
- Py_INCREF(t);
- *p = t;
- Py_DECREF(s);
- return;
- }
- if (interned == NULL) {
- interned = PyDict_New();
- if (interned == NULL)
- return;
- }
- if ((t = PyDict_GetItem(interned, (PyObject *)s)) != NULL) {
- Py_INCREF(t);
- *p = s->ob_sinterned = t;
- Py_DECREF(s);
- return;
- }
- t = (PyObject *)s;
- if (PyDict_SetItem(interned, t, t) == 0) {
- s->ob_sinterned = t;
- return;
- }
- PyErr_Clear();
- }
-
-
- PyObject *
- PyString_InternFromString(cp)
- const char *cp;
- {
- PyObject *s = PyString_FromString(cp);
- if (s == NULL)
- return NULL;
- PyString_InternInPlace(&s);
- return s;
- }
-
- #endif
-
- void
- PyString_Fini()
- {
- int i;
- for (i = 0; i < UCHAR_MAX + 1; i++) {
- Py_XDECREF(characters[i]);
- characters[i] = NULL;
- }
- #ifndef DONT_SHARE_SHORT_STRINGS
- Py_XDECREF(nullstring);
- nullstring = NULL;
- #endif
- #ifdef INTERN_STRINGS
- if (interned) {
- int pos, changed;
- PyObject *key, *value;
- do {
- changed = 0;
- pos = 0;
- while (PyDict_Next(interned, &pos, &key, &value)) {
- if (key->ob_refcnt == 2 && key == value) {
- PyDict_DelItem(interned, key);
- changed = 1;
- }
- }
- } while (changed);
- }
- #endif
- }
-