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Util (mallocHelper): implements ffMallocUsableSize and uses it

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This commit is contained in:
Carter Li
2025-12-19 23:24:56 +08:00
committed by 李通洲
parent a9f43ff466
commit b64b93fc4a
5 changed files with 74 additions and 4 deletions
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src/util/FFstrbuf.c
+20 -3
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@@ -1,4 +1,5 @@
#include "FFstrbuf.h"
#include "util/mallocHelper.h"
#include <ctype.h>
#include <inttypes.h>
@@ -21,11 +22,27 @@ void ffStrbufInitVF(FFstrbuf* strbuf, const char* format, va_list arguments)
{
assert(format != NULL);
int len = vasprintf(&strbuf->chars, format, arguments);
char* buffer = NULL;
int len = vasprintf(&buffer, format, arguments);
assert(len >= 0);
strbuf->allocated = (uint32_t)(len + 1);
strbuf->length = (uint32_t)len;
ffStrbufInitMoveNS(strbuf, (uint32_t)len, buffer);
}
// Takes ownership of `heapStr`. The caller must not free `heapStr` after calling this
// function; the memory will be managed and freed via the associated FFstrbuf.
void ffStrbufInitMoveNS(FFstrbuf* strbuf, uint32_t length, char* heapStr)
{
assert(heapStr != NULL);
strbuf->length = length;
size_t allocSize = ffMallocUsableSize(heapStr);
if (allocSize == 0)
allocSize = length + 1;
else if (allocSize > UINT32_MAX)
allocSize = UINT32_MAX;
strbuf->allocated = (uint32_t) allocSize;
strbuf->chars = heapStr;
}
void ffStrbufEnsureFree(FFstrbuf* strbuf, uint32_t free)