Mercurial > cpython-lru_cache-weakref

comparison Python/mysnprintf.c @ 21126:6b6a9cae256e legacy-trunk

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When the number of bytes written to the malloc'ed buffer is larger than the argument string size, copy as many bytes as will fit (including a terminating '\0'), rather than not copying anything. This to make it satisfy the C99 spec.
author Guido van Rossum <guido@python.org>
date Sat, 01 Dec 2001 16:00:10 +0000
parents 2bc648932d44
children 87fa6e9bd77e
comparison
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21125:17e87aa37796 21126:6b6a9cae256e
38 } 38 }
39 len++; 39 len++;
40 assert(len >= 0); 40 assert(len >= 0);
41 if ((size_t)len > size + 512) 41 if ((size_t)len > size + 512)
42 Py_FatalError("Buffer overflow in PyOS_snprintf/PyOS_vsnprintf"); 42 Py_FatalError("Buffer overflow in PyOS_snprintf/PyOS_vsnprintf");
43 if ((size_t)len > size) { 43 if ((size_t)len > size)
44 PyMem_Free(buffer); 44 buffer[size-1] = '\0';
45 return len - 1; 45 else
46 } 46 size = len;
47 memcpy(str, buffer, len); 47 memcpy(str, buffer, size);
48 PyMem_Free(buffer); 48 PyMem_Free(buffer);
49 return len - 1; 49 return len - 1;
50 } 50 }
51 51
52 int PyOS_snprintf(char *str, size_t size, const char *format, ...) 52 int PyOS_snprintf(char *str, size_t size, const char *format, ...)