Making a 'read-entire-file-into-a-string' function. Reads the whole thing in one…

Making a 'read-entire-file-into-a-string' function. Reads the whole thing in one chunk (uses fseek/ftell to compute the length), and seems to handle unicode just fine.

src/chars.txt

+#header > #leftpane > [data-ur-tabs-component="button"] {
+  > div {
+    padding: 10px;
+  }
+  > div:after {
+    content: "▼";
+    float: right;
+  }
+  &[data-ur-state="enabled"] > div:after {
+    content: "▲";
+    float: right;
+  }
+}
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src/file.c

+#include <stdlib.h>
+#include <stdio.h>
+#include "file.h"
+
+char *sass_read_file(char *path) {
+  FILE *f;
+  f = fopen(path, "rb");
+  if (!f) {
+    printf("Couldn't open file %s", path);
+    abort();
+  }
+  fseek(f, 0L, SEEK_END);
+  int len = ftell(f);
+  rewind(f);
+  char *buf = (char *)malloc(len * sizeof(char) + 1);
+  fread(buf, sizeof(char), len, f);
+  buf[len] = '\0';
+  return buf;
+}
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src/file.h

+char *sass_read_file(char *);
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src/test_file.c

+#include <stdio.h>
+#include "file.h"
+
+int main() {
+  char *src = sass_read_file("chars.txt");
+  printf("<BEGINNING OF FILE>\n");
+  while (*src++) putchar(*src);
+  printf("<EOF>");
+  return 0;
+}
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