Mercurial > cpython-lru_cache-weakref
annotate Python/memmove.c @ 18065:889db6d55506 legacy-trunk
SF bug 430991: wrong co_lnotab
Armin Rigo pointed out that the way the line-# table got built didn't work
for lines generating more than 255 bytes of bytecode. Fixed as he
suggested, plus corresponding changes to pyassem.py, plus added some
long overdue docs about this subtle table to compile.c.
Bugfix candidate (line numbers may be off in tracebacks under -O).
| author | Tim Peters <tim.peters@gmail.com> |
|---|---|
| date | Sat, 09 Jun 2001 09:26:21 +0000 |
| parents | 6f6f965c5e2d |
| children |
| rev | line source |
|---|---|
| 1449 | 1 |
| 2 /* A perhaps slow but I hope correct implementation of memmove */ | |
| 3 | |
|
13658
f79434ee41fa
Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents:
13256
diff
changeset
|
4 extern char *memcpy(char *, char *, int); |
| 1449 | 5 |
| 6 char * | |
|
13658
f79434ee41fa
Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents:
13256
diff
changeset
|
7 memmove(char *dst, char *src, int n) |
| 1449 | 8 { |
| 9 char *realdst = dst; | |
| 10 if (n <= 0) | |
| 11 return dst; | |
| 12 if (src >= dst+n || dst >= src+n) | |
| 13 return memcpy(dst, src, n); | |
| 14 if (src > dst) { | |
| 15 while (--n >= 0) | |
| 16 *dst++ = *src++; | |
| 17 } | |
| 18 else if (src < dst) { | |
| 19 src += n; | |
| 20 dst += n; | |
| 21 while (--n >= 0) | |
| 22 *--dst = *--src; | |
| 23 } | |
| 24 return realdst; | |
| 25 } |