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ast_frdup optimization: only call strlen once and save the result

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2801 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
James Golovich
2004-04-28 17:54:01 +00:00
parent 8ace87616e
commit ceb572a280
1 changed files with 6 additions and 4 deletions
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10
frame.c
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@@ -282,13 +282,15 @@ struct ast_frame *ast_frisolate(struct ast_frame *fr)
struct ast_frame *ast_frdup(struct ast_frame *f) struct ast_frame *ast_frdup(struct ast_frame *f)
{ {
struct ast_frame *out; struct ast_frame *out;
int len; int len, srclen = 0;
void *buf; void *buf;
/* Start with standard stuff */ /* Start with standard stuff */
len = sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET + f->datalen; len = sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET + f->datalen;
/* If we have a source, add space for it */ /* If we have a source, add space for it */
if (f->src && strlen(f->src)) if (f->src)
len += strlen(f->src) + 1; srclen = strlen(f->src);
if (srclen > 0)
len += srclen + 1;
buf = malloc(len); buf = malloc(len);
if (!buf) if (!buf)
return NULL; return NULL;
@@ -303,7 +305,7 @@ struct ast_frame *ast_frdup(struct ast_frame *f)
out->mallocd = AST_MALLOCD_HDR; out->mallocd = AST_MALLOCD_HDR;
out->offset = AST_FRIENDLY_OFFSET; out->offset = AST_FRIENDLY_OFFSET;
out->data = buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET; out->data = buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
if (f->src && strlen(f->src)) { if (srclen > 0) {
out->src = out->data + f->datalen; out->src = out->data + f->datalen;
/* Must have space since we allocated for it */ /* Must have space since we allocated for it */
strcpy(out->src, f->src); strcpy(out->src, f->src);