6 typedef struct _Buffer {
12 void InitBuffer (Buffer *b);
13 void AppendToBuffer (register Buffer *b, const char *str, register int len);
14 void ReadFile (register Buffer *buffer, FILE *input);
17 #define INIT_BUFFER_SIZE 10000
22 b->room = INIT_BUFFER_SIZE;
24 b->buff = (char *)malloc(INIT_BUFFER_SIZE*sizeof(char));
27 void AppendToBuffer(b, str, len)
32 while (b->used + len > b->room) {
33 b->buff = (char *)realloc(b->buff, 2*b->room*(sizeof(char)));
36 strncpy(b->buff + b->used, str, len);
40 void ReadFile(buffer, input)
41 register Buffer *buffer;
48 while (!feof(input) && (bytes = fread(buf, 1, BUFSIZ, input)) > 0) {
49 AppendToBuffer(buffer, buf, bytes);
51 AppendToBuffer(buffer, "", 1);
55 main(int argc, char *argv[])
57 char filename[] = "xbug.c";
63 if (!freopen (filename, "r", stdin))
64 fprintf(stderr, "cannot open file\n");
66 unsetenv ("LD_LIBRARY_PATH");
68 if (!(input = popen("/bin/cat", "r")))
69 fprintf(stderr, "cannot run \n");
71 ReadFile(&buffer, input);