confgen

commit 5c16d71ac19bb1734e98575ff17e28f97c09a612
parent 3ad2986ed2a48ccb1443c60ac59d047c898f7943
Author: finwo <finwo@pm.me>
Date:   Wed, 15 Jul 2026 02:47:57 +0200

File reading

Diffstat:
M
src/main.c
 | 
62
++++++++++++++++++++++++++++++++------------------------------
A
template/util/buffer.example.c
 | 
41
+++++++++++++++++++++++++++++++++++++++++

2 files changed, 73 insertions(+), 30 deletions(-)
diff --git a/src/main.c b/src/main.c
@@ -1,40 +1,42 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #include "util/buffer.h"
 
-int main() {
-
-  struct confgen_buffer *buf = calloc(1, sizeof(struct confgen_buffer));
-
-  confgen_buffer_append(buf, "Hello world", 11);
-
-  printf("Stats:\n");
-  printf("  alloc: %p\n" , buf->alloc);
-  printf("  dat  : %p\n" , buf->dat);
-  printf("  len  : %ld\n", buf->len);
-  printf("  cap  : %ld\n", buf->cap);
-  printf("  data : [%*s]\n", (int)(buf->len), buf->dat);
-  printf("\n");
-
-  confgen_buffer_append(buf, "™", 3);
-
-  printf("Stats:\n");
-  printf("  alloc: %p\n" , buf->alloc);
-  printf("  dat  : %p\n" , buf->dat);
-  printf("  len  : %ld\n", buf->len);
-  printf("  cap  : %ld\n", buf->cap);
-  printf("  data : [%*s]\n", (int)(buf->len), buf->dat);
-  printf("\n");
-
-  confgen_buffer_consume(buf, 6);
+int main(int argc, char *argv[]) {
+  FILE *fp;
+  size_t n;
+
+  char *infile = "-";
+  if (argc > 1) {
+    infile = argv[1];
+  }
+
+  if (!strcmp(infile, "-")) {
+    fp = stdin;
+  } else {
+    fp = fopen(infile, "r");
+  }
+  if (!fp) {
+    perror("fopen");
+    return EXIT_FAILURE;
+  }
+
+
+  struct confgen_buffer *ring = calloc(1, sizeof(struct confgen_buffer));
+  char *intermediate          = malloc(BUFSIZ);
+  while(!feof(fp)) {
+    n = fread(intermediate, 1, BUFSIZ, fp);
+    confgen_buffer_append(ring, intermediate, n);
+  }
 
   printf("Stats:\n");
-  printf("  alloc: %p\n" , buf->alloc);
-  printf("  dat  : %p\n" , buf->dat);
-  printf("  len  : %ld\n", buf->len);
-  printf("  cap  : %ld\n", buf->cap);
-  printf("  data : [%*s]\n", (int)(buf->len), buf->dat);
+  printf("  alloc: %p\n" , ring->alloc);
+  printf("  dat  : %p\n" , ring->dat);
+  printf("  len  : %ld\n", ring->len);
+  printf("  cap  : %ld\n", ring->cap);
+  printf("  data : [%*s]\n", (int)(ring->len), ring->dat);
   printf("\n");
 
   return 0;
diff --git a/template/util/buffer.example.c b/template/util/buffer.example.c
@@ -0,0 +1,41 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "buffer.h"
+
+int main() {
+
+  struct confgen_buffer *buf = calloc(1, sizeof(struct confgen_buffer));
+
+  confgen_buffer_append(buf, "Hello world", 11);
+
+  printf("Stats:\n");
+  printf("  alloc: %p\n" , buf->alloc);
+  printf("  dat  : %p\n" , buf->dat);
+  printf("  len  : %ld\n", buf->len);
+  printf("  cap  : %ld\n", buf->cap);
+  printf("  data : [%*s]\n", (int)(buf->len), buf->dat);
+  printf("\n");
+
+  confgen_buffer_append(buf, "™", 3);
+
+  printf("Stats:\n");
+  printf("  alloc: %p\n" , buf->alloc);
+  printf("  dat  : %p\n" , buf->dat);
+  printf("  len  : %ld\n", buf->len);
+  printf("  cap  : %ld\n", buf->cap);
+  printf("  data : [%*s]\n", (int)(buf->len), buf->dat);
+  printf("\n");
+
+  confgen_buffer_consume(buf, 6);
+
+  printf("Stats:\n");
+  printf("  alloc: %p\n" , buf->alloc);
+  printf("  dat  : %p\n" , buf->dat);
+  printf("  len  : %ld\n", buf->len);
+  printf("  cap  : %ld\n", buf->cap);
+  printf("  data : [%*s]\n", (int)(buf->len), buf->dat);
+  printf("\n");
+
+  return 0;
+}