1 files changed, 59 insertions, 0 deletions
diff --git a/42sh/src/parser/parser_redir.c b/42sh/src/parser/parser_redir.c
new file mode 100644
index 0000000..9a06d0b
--- /dev/null
+++ b/42sh/src/parser/parser_redir.c
@@ -0,0 +1,59 @@
+#include <err.h>
+
+#include "parser_functions.h"
+#include "parser_utils.h"
+
+struct ast *parse_redirection(struct lexer *lexer, enum parser_state *state)
+{
+    // The caller (prefix grammar in this case) will have to attach its
+    // own ast as the left child of the redir ast
+    struct ast *redir = ast_create(AST_REDIRECTION);
+    if (redir == NULL)
+    {
+        QUICK_CLEANUP
+    }
+
+    struct token next = lexer_peek(lexer);
+
+    union ast_caster cast;
+    cast.ast = redir;
+
+    if (next.type == TOKEN_IONUMBER)
+    {
+        cast.ast_r->redirect.fd = next.value;
+        lexer_pop(lexer);
+        next = lexer_peek(lexer);
+    }
+    else
+    {
+        cast.ast_r->redirect.fd = string_create("1");
+    }
+
+    if (next.type != TOKEN_REDIR)
+    {
+        cleanup(redir, state);
+        return NULL;
+    }
+
+    cast.ast_r->redirect.redir = next.value;
+    if (next.value->data[0] == '<' && cast.ast_r->redirect.fd->data[0] == '1')
+    {
+        cast.ast_r->redirect.fd->data[0] = '0';
+    }
+
+    lexer_pop(lexer);
+    next = lexer_peek(lexer);
+
+    if (!(ISWORD(next.type)))
+    {
+        cleanup(redir, state);
+        errx(2, "redir: bad grammar (bad redir).");
+    }
+
+    litteral_reserved_word(&next);
+    cast.ast_r->redirect.file = next.value;
+    lexer_pop(lexer);
+
+    ((struct ast_redirection *)redir)->redirect = cast.ast_r->redirect;
+    return redir;
+}