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Work around malloc(0) returning NULL.

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This commit is contained in:
Jonathan Schleifer 2012-09-30 05:20:09 +02:00
parent e661734b9a
commit 8f99011887
1 changed files with 30 additions and 16 deletions
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22
src/stream.c
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@ -120,11 +120,14 @@ cfw_stream_read_line(void *ptr)
}
cfw_string_set_nocopy(ret, ret_str, ret_len);
new_cache = malloc(stream->cache_len - i - 1);
if (new_cache == NULL)
if (stream->cache_len - i - 1 > 0) {
if ((new_cache = malloc(
stream->cache_len - i - 1)) == NULL)
return NULL;
memcpy(new_cache, stream->cache + i + 1,
stream->cache_len - i - 1);
} else
new_cache = cfw_strdup("");
free(stream->cache);
stream->cache = new_cache;
@ -204,12 +207,16 @@ cfw_stream_read_line(void *ptr)
}
cfw_string_set_nocopy(ret, ret_str, ret_len);
if (buf_len - i - 1 > 0) {
new_cache = malloc(buf_len - i - 1);
if (new_cache == NULL) {
free(buf);
return NULL;
}
memcpy(new_cache, buf + i + 1, buf_len - i - 1);
memcpy(new_cache, buf + i + 1,
buf_len - i - 1);
} else
new_cache = cfw_strdup("");
free(stream->cache);
stream->cache = new_cache;
@ -221,12 +228,19 @@ cfw_stream_read_line(void *ptr)
}
/* There was no newline or \0 */
new_cache = realloc(stream->cache, stream->cache_len + buf_len);
if (stream->cache_len + buf_len > 0) {
new_cache = realloc(stream->cache,
stream->cache_len + buf_len);
if (new_cache == NULL) {
free(buf);
return NULL;
}
memcpy(new_cache + stream->cache_len, buf, buf_len);
} else {
free(stream->cache);
new_cache = cfw_strdup("");
}
stream->cache = new_cache;
stream->cache_len += buf_len;
}