From 4fcd26ca7ab48a44682c952313aad56d42f8407f Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Sun, 21 Jul 2024 20:15:03 +0200
Subject: read_file utils

---
 src/tak.c | 105 +++++++++++++-------------------------------------------------
 1 file changed, 22 insertions(+), 83 deletions(-)

(limited to 'src/tak.c')

diff --git a/src/tak.c b/src/tak.c
index e970ae1..e8fb817 100644
--- a/src/tak.c
+++ b/src/tak.c
@@ -6,6 +6,7 @@
 
 #include "util/map.h"
 #include "util/versie.h"
+#include "io/read_file.h"
 
 static void usage(FILE *f) {
   fprintf(f,
@@ -39,25 +40,20 @@ static char** parse_options(int argc, char **argv) {
   return argv + optind;
 }
 
-struct state {
-  char *buf;
-  size_t sz;
-};
-
-static void process(struct state state) {
+static void process(struct filebuf *fb) {
   char *lstart, *lend;
-  lend = &state.buf[state.sz - 1];
+  lend = &fb->buf[fb->sz - 1];
 
-  while (lend > state.buf) {
+  while (lend > fb->buf) {
     if (*lend == '\n') {
       lend--;
     }
 
     lstart = lend;
-    while (*lstart != '\n' && lstart != state.buf) {
+    while (*lstart != '\n' && lstart != fb->buf) {
       lstart--;
     }
-    if (lstart != state.buf) {
+    if (lstart != fb->buf) {
       lstart++;
     }
 
@@ -65,96 +61,39 @@ static void process(struct state state) {
 
     lend = lstart-1;
   }
-}
-
-#define CHECK_OOM(ptr) \
-  if (ptr == NULL) { \
-    fprintf(stderr, "tak: geheugen is op"); \
-    /* I think I should free the original memory here, but whatever */ \
-    return NULL; \
-  }
 
-static char *read_stream(FILE *stream, size_t *sz) {
-  *sz = 0;
-  size_t cap = 4096;
-  char *res = malloc(cap);
-  CHECK_OOM(res);
-
-  while (!feof(stream)) {
-    if (cap-*sz == 0) {
-      cap *= 2;
-      res = realloc(res, cap);
-      CHECK_OOM(res);
-    }
-
-    const size_t amount = cap-*sz;
-    const size_t n = fread(res+*sz, 1, amount, stream);
-    *sz += n;
-
-    if (n != amount && !feof(stream)) {
-      fprintf(stderr, "tak: fout tijdens lezen van standaard invoer.\n");
-      free(res);
-      return NULL;
-    }
-  }
-
-  res = realloc(res, *sz);
-  return res;
-}
-
-int handleStream(FILE *stream) {
-  size_t sz = 0;
-  char *data = read_stream(stream, &sz);
-  if (data == NULL) {
-    return 1;
-  }
-
-  struct state state = { .buf = data, .sz = sz };
-  process(state);
-
-  free(data);
-  return 0;
-}
-
-int handleFile(char *fname) {
-  struct map *map = open_map(fname);
-  if (map == NULL) {
-    return 1;
-  }
-
-  struct state state = { .buf = map->addr, .sz = map->sb.st_size };
-  process(state);
-
-  close_map(map);
-
-  return 0;
+  free_filebuf(fb);
 }
 
 int entry_tak(int argc, char **argv) {
   char **args = parse_options(argc, argv);
 
   if (*args == NULL) {
-    handleStream(stdin);
+    struct filebuf *fb = stream_to_filebuf(stdin);
+    if (fb == NULL) {
+      return 1;
+    }
+
+    process(fb);
     return 0;
   }
 
   while (*args != NULL) {
+    struct filebuf *fb = NULL;
+
     if (!strcmp(*args, "-")) {
-      handleStream(stdin);
-      goto next;
+      fb = stream_to_filebuf(stdin);
+      if (fb == NULL) {
+        return 1;
+      }
     }
 
-    if (!handleFile(*args)) {
-      goto next;
+    if (fb == NULL) {
+      fb = file_to_filebuf(*args);
     }
 
-    FILE *stream = fopen(*args, "rb");
-    if (handleStream(stream)) {
-      return 1;
-    }
-    fclose(stream);
+    process(fb);
 
-next:
     args++;
   }
 
-- 
cgit v1.2.3-70-g09d2