Imported xs.

1 files changed, 86 insertions, 0 deletions

diff --git a/xs_io.h b/xs_io.h
new file mode 100644
index 0000000..523d207
--- /dev/null
+++ b/xs_io.h
@@ -0,0 +1,86 @@
+/* copyright (c) 2022 grunfink - MIT license */
+
+#ifndef _XS_IO_H
+
+#define _XS_IO_H
+
+d_char *xs_readall(FILE *f);
+d_char *xs_readline(FILE *f);
+d_char *xs_read(FILE *f, int size);
+
+
+#ifdef XS_IMPLEMENTATION
+
+d_char *xs_readall(FILE *f)
+/* reads the rest of the file into a string */
+{
+    d_char *s;
+    char tmp[1024];
+
+    errno = 0;
+
+    /* create the new string */
+    s = xs_str_new(NULL);
+
+    while (fgets(tmp, sizeof(tmp), f))
+        s = xs_str_cat(s, tmp);
+
+    return s;
+}
+
+
+d_char *xs_readline(FILE *f)
+/* reads a line from a file */
+{
+    d_char *s = NULL;
+
+    errno = 0;
+
+    /* don't even try on eof */
+    if (!feof(f)) {
+        int c;
+
+        s = xs_str_new(NULL);
+
+        while ((c = fgetc(f)) != EOF) {
+            unsigned char rc = c;
+
+            s = xs_append_m(s, (char *)&rc, 1);
+
+            if (c == '\n')
+                break;
+        }
+    }
+
+    return s;
+}
+
+
+d_char *xs_read(FILE *f, int size)
+/* reads up to size bytes from f */
+{
+    d_char *s;
+
+    errno = 0;
+
+    s = xs_str_new(NULL);
+
+    while (size != 0 && !feof(f)) {
+        char tmp[2048];
+        int n, r;
+
+        if ((n = sizeof(tmp)) > size)
+            n = size;
+
+        r = fread(tmp, 1, n, f);
+        s = xs_append_m(s, tmp, r);
+
+        size -= r;
+    }
+
+    return s;
+}
+
+#endif /* XS_IMPLEMENTATION */
+
+#endif /* _XS_IO_H */