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9bfef44d97
* Stubs for faster implementation of local variables (not yet finished) * Added function name to code object. Print it for code and function objects. THIS MAKES THE .PYC FILE FORMAT INCOMPATIBLE (the version number has changed accordingly) * Print address of self for built-in methods * New internal functions getattro and setattro (getattr/setattr with string object arg) * Replaced "dictobject" with more powerful "mappingobject" * New per-type functio tp_hash to implement arbitrary object hashing, and hashobject() to interface to it * Added built-in functions hash(v) and hasattr(v, 'name') * classobject: made some functions static that accidentally weren't; added __hash__ special instance method to implement hash() * Added proper comparison for built-in methods and functions
733 lines
15 KiB
C
733 lines
15 KiB
C
/***********************************************************
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Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* String object implementation */
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#include "allobjects.h"
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object *
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newsizedstringobject(str, size)
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char *str;
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int size;
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{
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register stringobject *op = (stringobject *)
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malloc(sizeof(stringobject) + size * sizeof(char));
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if (op == NULL)
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return err_nomem();
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NEWREF(op);
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op->ob_type = &Stringtype;
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op->ob_size = size;
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if (str != NULL)
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memcpy(op->ob_sval, str, size);
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op->ob_sval[size] = '\0';
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return (object *) op;
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}
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object *
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newstringobject(str)
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char *str;
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{
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register unsigned int size = strlen(str);
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register stringobject *op = (stringobject *)
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malloc(sizeof(stringobject) + size * sizeof(char));
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if (op == NULL)
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return err_nomem();
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NEWREF(op);
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op->ob_type = &Stringtype;
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op->ob_size = size;
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strcpy(op->ob_sval, str);
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return (object *) op;
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}
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void
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string_dealloc(op)
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object *op;
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{
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DEL(op);
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}
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unsigned int
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getstringsize(op)
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register object *op;
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{
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if (!is_stringobject(op)) {
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err_badcall();
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return -1;
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}
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return ((stringobject *)op) -> ob_size;
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}
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/*const*/ char *
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getstringvalue(op)
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register object *op;
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{
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if (!is_stringobject(op)) {
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err_badcall();
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return NULL;
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}
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return ((stringobject *)op) -> ob_sval;
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}
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/* Methods */
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static int
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string_print(op, fp, flags)
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stringobject *op;
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FILE *fp;
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int flags;
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{
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int i;
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char c;
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/* XXX Ought to check for interrupts when writing long strings */
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if (flags & PRINT_RAW) {
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fwrite(op->ob_sval, 1, (int) op->ob_size, fp);
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return 0;
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}
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fprintf(fp, "'");
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for (i = 0; i < op->ob_size; i++) {
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c = op->ob_sval[i];
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if (c == '\'' || c == '\\')
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fprintf(fp, "\\%c", c);
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else if (c < ' ' || c >= 0177)
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fprintf(fp, "\\%03o", c&0377);
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else
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putc(c, fp);
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}
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fprintf(fp, "'");
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return 0;
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}
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static object *
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string_repr(op)
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register stringobject *op;
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{
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/* XXX overflow? */
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int newsize = 2 + 4 * op->ob_size * sizeof(char);
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object *v = newsizedstringobject((char *)NULL, newsize);
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if (v == NULL) {
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return NULL;
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}
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else {
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register int i;
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register char c;
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register char *p;
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p = ((stringobject *)v)->ob_sval;
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*p++ = '\'';
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for (i = 0; i < op->ob_size; i++) {
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c = op->ob_sval[i];
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if (c == '\'' || c == '\\')
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*p++ = '\\', *p++ = c;
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else if (c < ' ' || c >= 0177) {
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sprintf(p, "\\%03o", c&0377);
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while (*p != '\0')
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p++;
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}
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else
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*p++ = c;
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}
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*p++ = '\'';
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*p = '\0';
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resizestring(&v, (int) (p - ((stringobject *)v)->ob_sval));
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return v;
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}
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}
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static int
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string_length(a)
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stringobject *a;
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{
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return a->ob_size;
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}
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static object *
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string_concat(a, bb)
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register stringobject *a;
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register object *bb;
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{
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register unsigned int size;
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register stringobject *op;
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if (!is_stringobject(bb)) {
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err_badarg();
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return NULL;
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}
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#define b ((stringobject *)bb)
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/* Optimize cases with empty left or right operand */
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if (a->ob_size == 0) {
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INCREF(bb);
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return bb;
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}
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if (b->ob_size == 0) {
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INCREF(a);
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return (object *)a;
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}
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size = a->ob_size + b->ob_size;
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op = (stringobject *)
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malloc(sizeof(stringobject) + size * sizeof(char));
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if (op == NULL)
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return err_nomem();
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NEWREF(op);
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op->ob_type = &Stringtype;
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op->ob_size = size;
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memcpy(op->ob_sval, a->ob_sval, (int) a->ob_size);
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memcpy(op->ob_sval + a->ob_size, b->ob_sval, (int) b->ob_size);
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op->ob_sval[size] = '\0';
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return (object *) op;
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#undef b
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}
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static object *
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string_repeat(a, n)
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register stringobject *a;
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register int n;
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{
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register int i;
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register unsigned int size;
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register stringobject *op;
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if (n < 0)
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n = 0;
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size = a->ob_size * n;
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if (size == a->ob_size) {
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INCREF(a);
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return (object *)a;
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}
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op = (stringobject *)
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malloc(sizeof(stringobject) + size * sizeof(char));
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if (op == NULL)
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return err_nomem();
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NEWREF(op);
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op->ob_type = &Stringtype;
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op->ob_size = size;
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for (i = 0; i < size; i += a->ob_size)
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memcpy(op->ob_sval+i, a->ob_sval, (int) a->ob_size);
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op->ob_sval[size] = '\0';
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return (object *) op;
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}
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/* String slice a[i:j] consists of characters a[i] ... a[j-1] */
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static object *
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string_slice(a, i, j)
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register stringobject *a;
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register int i, j; /* May be negative! */
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{
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if (i < 0)
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i = 0;
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if (j < 0)
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j = 0; /* Avoid signed/unsigned bug in next line */
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if (j > a->ob_size)
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j = a->ob_size;
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if (i == 0 && j == a->ob_size) { /* It's the same as a */
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INCREF(a);
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return (object *)a;
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}
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if (j < i)
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j = i;
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return newsizedstringobject(a->ob_sval + i, (int) (j-i));
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}
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#ifdef __STDC__
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#include <limits.h>
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#else
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#ifndef UCHAR_MAX
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#define UCHAR_MAX 255
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#endif
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#endif
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static object *characters[UCHAR_MAX + 1];
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static object *
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string_item(a, i)
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stringobject *a;
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register int i;
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{
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int c;
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object *v;
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if (i < 0 || i >= a->ob_size) {
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err_setstr(IndexError, "string index out of range");
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return NULL;
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}
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c = a->ob_sval[i] & UCHAR_MAX;
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v = characters[c];
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if (v == NULL) {
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v = newsizedstringobject((char *)NULL, 1);
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if (v == NULL)
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return NULL;
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characters[c] = v;
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((stringobject *)v)->ob_sval[0] = c;
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}
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INCREF(v);
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return v;
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}
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static int
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string_compare(a, b)
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stringobject *a, *b;
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{
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int len_a = a->ob_size, len_b = b->ob_size;
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int min_len = (len_a < len_b) ? len_a : len_b;
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int cmp = memcmp(a->ob_sval, b->ob_sval, min_len);
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if (cmp != 0)
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return cmp;
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return (len_a < len_b) ? -1 : (len_a > len_b) ? 1 : 0;
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}
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static long
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string_hash(a)
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stringobject *a;
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{
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register int len = a->ob_size;
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register unsigned char *p = (unsigned char *) a->ob_sval;
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register long x = *p << 7;
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while (--len >= 0)
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x = (x + x + x) ^ *p++;
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x ^= a->ob_size;
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if (x == -1)
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x = -2;
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return x;
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}
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static sequence_methods string_as_sequence = {
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string_length, /*sq_length*/
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string_concat, /*sq_concat*/
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string_repeat, /*sq_repeat*/
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string_item, /*sq_item*/
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string_slice, /*sq_slice*/
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0, /*sq_ass_item*/
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0, /*sq_ass_slice*/
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};
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typeobject Stringtype = {
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OB_HEAD_INIT(&Typetype)
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0,
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"string",
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sizeof(stringobject),
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sizeof(char),
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string_dealloc, /*tp_dealloc*/
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string_print, /*tp_print*/
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0, /*tp_getattr*/
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0, /*tp_setattr*/
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string_compare, /*tp_compare*/
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string_repr, /*tp_repr*/
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0, /*tp_as_number*/
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&string_as_sequence, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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string_hash, /*tp_hash*/
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};
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void
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joinstring(pv, w)
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register object **pv;
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register object *w;
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{
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register object *v;
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if (*pv == NULL || w == NULL || !is_stringobject(*pv))
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return;
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v = string_concat((stringobject *) *pv, w);
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DECREF(*pv);
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*pv = v;
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}
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/* The following function breaks the notion that strings are immutable:
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it changes the size of a string. We get away with this only if there
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is only one module referencing the object. You can also think of it
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as creating a new string object and destroying the old one, only
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more efficiently. In any case, don't use this if the string may
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already be known to some other part of the code... */
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int
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resizestring(pv, newsize)
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object **pv;
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int newsize;
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{
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register object *v;
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register stringobject *sv;
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v = *pv;
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if (!is_stringobject(v) || v->ob_refcnt != 1) {
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*pv = 0;
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DECREF(v);
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err_badcall();
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return -1;
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}
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/* XXX UNREF/NEWREF interface should be more symmetrical */
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#ifdef REF_DEBUG
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--ref_total;
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#endif
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UNREF(v);
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*pv = (object *)
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realloc((char *)v,
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sizeof(stringobject) + newsize * sizeof(char));
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if (*pv == NULL) {
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DEL(v);
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err_nomem();
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return -1;
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}
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NEWREF(*pv);
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sv = (stringobject *) *pv;
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sv->ob_size = newsize;
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sv->ob_sval[newsize] = '\0';
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return 0;
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}
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/* Helpers for formatstring */
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static object *
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getnextarg(args, arglen, p_argidx)
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object *args;
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int arglen;
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int *p_argidx;
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{
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int argidx = *p_argidx;
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if (argidx < arglen) {
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(*p_argidx)++;
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if (arglen < 0)
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return args;
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else
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return gettupleitem(args, argidx);
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}
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err_setstr(TypeError, "not enough arguments for format string");
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return NULL;
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}
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#define F_LJUST (1<<0)
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#define F_SIGN (1<<1)
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#define F_BLANK (1<<2)
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#define F_ALT (1<<3)
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#define F_ZERO (1<<4)
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extern double fabs PROTO((double));
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|
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static char *
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formatfloat(flags, prec, type, v)
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int flags;
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int prec;
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int type;
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object *v;
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{
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char fmt[20];
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static char buf[120];
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double x;
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if (!getargs(v, "d;float argument required", &x))
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return NULL;
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if (prec < 0)
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prec = 6;
|
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if (prec > 50)
|
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prec = 50; /* Arbitrary limitation */
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if (type == 'f' && fabs(x)/1e25 >= 1e25)
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type = 'g';
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sprintf(fmt, "%%%s.%d%c", (flags&F_ALT) ? "#" : "", prec, type);
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sprintf(buf, fmt, x);
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return buf;
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}
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static char *
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formatint(flags, prec, type, v)
|
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int flags;
|
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int prec;
|
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int type;
|
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object *v;
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{
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char fmt[20];
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static char buf[50];
|
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long x;
|
|
if (!getargs(v, "l;int argument required", &x))
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return NULL;
|
|
if (prec < 0)
|
|
prec = 1;
|
|
sprintf(fmt, "%%%s.%dl%c", (flags&F_ALT) ? "#" : "", prec, type);
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sprintf(buf, fmt, x);
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return buf;
|
|
}
|
|
|
|
static char *
|
|
formatchar(v)
|
|
object *v;
|
|
{
|
|
static char buf[2];
|
|
if (is_stringobject(v)) {
|
|
if (!getargs(v, "c;%c requires int or char", &buf[0]))
|
|
return NULL;
|
|
}
|
|
else {
|
|
if (!getargs(v, "b;%c requires int or char", &buf[0]))
|
|
return NULL;
|
|
}
|
|
buf[1] = '\0';
|
|
return buf;
|
|
}
|
|
|
|
/* fmt%(v1,v2,...) is roughly equivalent to sprintf(fmt, v1, v2, ...) */
|
|
|
|
object *
|
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formatstring(format, args)
|
|
object *format;
|
|
object *args;
|
|
{
|
|
char *fmt, *res;
|
|
int fmtcnt, rescnt, reslen, arglen, argidx;
|
|
object *result;
|
|
if (format == NULL || !is_stringobject(format) || args == NULL) {
|
|
err_badcall();
|
|
return NULL;
|
|
}
|
|
reslen = rescnt = 100;
|
|
result = newsizedstringobject((char *)NULL, reslen);
|
|
if (result == NULL)
|
|
return NULL;
|
|
res = getstringvalue(result);
|
|
fmt = getstringvalue(format);
|
|
fmtcnt = getstringsize(format);
|
|
if (is_tupleobject(args)) {
|
|
arglen = gettuplesize(args);
|
|
argidx = 0;
|
|
}
|
|
else {
|
|
arglen = -1;
|
|
argidx = -2;
|
|
}
|
|
while (--fmtcnt >= 0) {
|
|
if (*fmt != '%') {
|
|
if (--rescnt < 0) {
|
|
rescnt = reslen;
|
|
reslen = reslen * 2; /* Maybe less when big? */
|
|
if (resizestring(&result, reslen) < 0)
|
|
return NULL;
|
|
res = getstringvalue(result) + rescnt;
|
|
rescnt = reslen - rescnt;
|
|
}
|
|
*res++ = *fmt++;
|
|
}
|
|
else {
|
|
/* Got a format specifier */
|
|
int flags = 0;
|
|
char *fmtstart = fmt++;
|
|
int width = -1;
|
|
int prec = -1;
|
|
int size = 0;
|
|
int c;
|
|
int fill;
|
|
object *v;
|
|
char *buf;
|
|
int sign;
|
|
int len;
|
|
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 (!is_intobject(v)) {
|
|
err_setstr(TypeError, "* wants int");
|
|
goto error;
|
|
}
|
|
width = getintvalue(v);
|
|
if (width < 0)
|
|
width = 0;
|
|
if (--fmtcnt >= 0)
|
|
c = *fmt++;
|
|
}
|
|
else if (isdigit(c)) {
|
|
width = c - '0';
|
|
while (--fmtcnt >= 0) {
|
|
c = *fmt++;
|
|
if (!isdigit(c))
|
|
break;
|
|
if ((width*10) / 10 != width) {
|
|
err_setstr(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 (!is_intobject(v)) {
|
|
err_setstr(TypeError,
|
|
"* wants int");
|
|
goto error;
|
|
}
|
|
prec = getintvalue(v);
|
|
if (prec < 0)
|
|
prec = 0;
|
|
if (--fmtcnt >= 0)
|
|
c = *fmt++;
|
|
}
|
|
else if (isdigit(c)) {
|
|
prec = c - '0';
|
|
while (--fmtcnt >= 0) {
|
|
c = *fmt++;
|
|
if (!isdigit(c))
|
|
break;
|
|
if ((prec*10) / 10 != prec) {
|
|
err_setstr(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) {
|
|
err_setstr(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':
|
|
if (!is_stringobject(v)) {
|
|
err_setstr(TypeError,
|
|
"%s wants string");
|
|
goto error;
|
|
}
|
|
buf = getstringvalue(v);
|
|
len = getstringsize(v);
|
|
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 = formatint(flags, prec, c, v);
|
|
if (buf == NULL)
|
|
goto error;
|
|
len = strlen(buf);
|
|
sign = (c == 'd');
|
|
if (flags&F_ZERO)
|
|
fill = '0';
|
|
break;
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
buf = formatfloat(flags, prec, c, v);
|
|
if (buf == NULL)
|
|
goto error;
|
|
len = strlen(buf);
|
|
sign = 1;
|
|
if (flags&F_ZERO)
|
|
fill = '0';
|
|
break;
|
|
case 'c':
|
|
buf = formatchar(v);
|
|
if (buf == NULL)
|
|
goto error;
|
|
len = strlen(buf);
|
|
break;
|
|
default:
|
|
err_setstr(ValueError,
|
|
"unsupported format character");
|
|
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')) {
|
|
rescnt = reslen;
|
|
reslen = reslen + width + 100;
|
|
if (resizestring(&result, reslen) < 0)
|
|
return NULL;
|
|
res = getstringvalue(result) + rescnt;
|
|
rescnt = reslen - rescnt;
|
|
}
|
|
if (sign) {
|
|
*res++ = sign;
|
|
rescnt--;
|
|
if (width > len)
|
|
width--;
|
|
}
|
|
if (width > len && !(flags&F_LJUST)) {
|
|
do {
|
|
--rescnt;
|
|
*res++ = fill;
|
|
} while (--width > len);
|
|
}
|
|
memcpy(res, buf, len);
|
|
res += len;
|
|
rescnt -= len;
|
|
while (--width >= len) {
|
|
--rescnt;
|
|
*res++ = ' ';
|
|
}
|
|
} /* '%' */
|
|
} /* until end */
|
|
if (argidx < arglen) {
|
|
err_setstr(TypeError, "not all arguments converted");
|
|
goto error;
|
|
}
|
|
resizestring(&result, reslen - rescnt);
|
|
return result;
|
|
error:
|
|
DECREF(result);
|
|
return NULL;
|
|
}
|