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filestream_getline - be safer

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This commit is contained in:
twinaphex 2018-01-22 21:32:36 +01:00
parent e8ff299fd4
commit 6208981ad3
1 changed files with 16 additions and 10 deletions
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26
libretro-common/streams/file_stream.c
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@ -460,21 +460,27 @@ bool filestream_write_file(const char *path, const void *data, ssize_t size)
char *filestream_getline(RFILE *stream)
{
char* newline = (char*)malloc(9);
char* newline_tmp = NULL;
size_t cur_size = 8;
size_t idx = 0;
int in = filestream_getc(stream);
char* newline_tmp = NULL;
size_t cur_size = 8;
size_t idx = 0;
int in = 0;
char* newline = (char*)malloc(9);
if (!newline)
if (!stream || !newline)
{
if (newline)
free(newline);
return NULL;
}
in = filestream_getc(stream);
while (in != EOF && in != '\n')
{
if (idx == cur_size)
{
cur_size *= 2;
newline_tmp = (char*)realloc(newline, cur_size + 1);
cur_size *= 2;
newline_tmp = (char*)realloc(newline, cur_size + 1);
if (!newline_tmp)
{
@ -482,13 +488,13 @@ char *filestream_getline(RFILE *stream)
return NULL;
}
newline = newline_tmp;
newline = newline_tmp;
}
newline[idx++] = in;
in = filestream_getc(stream);
}
newline[idx] = '\0';
newline[idx] = '\0';
return newline;
}