outline a bit of parsing

1 files changed, 68 insertions, 0 deletions

diff --git a/parse.c b/parse.c
new file mode 100644
index 0000000..c1f1bb8
--- /dev/null
+++ b/parse.c
@@ -0,0 +1,68 @@
+#include "typeutils.h"
+#include "lex.h"
+
+DECLARE_VEC(char*, StrVec)
+
+
+typedef struct {
+    TokenVec tokens;
+    size_t pos;
+} TokStream;
+
+typedef enum {
+    STDIN_REDIR,
+    STDOUT_REDIT,
+} RedirKind;
+
+
+typedef struct {
+    RedirKind kind;
+
+    union {
+        char* std_redir_filename;
+    } as;
+} Redirect;
+DECLARE_VEC(Redirect, RedirectVec)
+
+
+typedef struct {
+    StrVec args;
+    RedirectVec redirects;
+    // TODO: prefix variable settings
+} Command;
+
+
+typedef enum {
+    CONN_PIPE,
+    CONN_EOL,
+    // TODO: add the |& thingy
+} Connector;
+
+
+typedef struct {
+    Command cmd;
+    Connector conn;
+} PipelineElement;
+
+
+DECLARE_VEC(PipelineElement, Pipeline)
+
+
+Command parse_command(TokStream* toks) {
+    StrVec args = make_StrVec(256);
+    RedirectVec redirects = make_RedirectVec(256);
+    for (
+        Token curr_tok; 
+        (curr_tok = toks->tokens.items[toks->pos], !(curr_tok.kind == TOK_SPECIAL && (curr_tok.as.spec == PIPE && curr_tok.as.spec == EOL)));
+        toks->pos++
+    ) {
+        if (curr_tok.kind == TOK_SPECIAL) {
+        } 
+    }
+}
+
+
+Pipeline parse_tokstream(TokenVec toks) {
+    TokStream tokstream = {.tokens = toks, .pos = 0};
+    Pipeline result = make_Pipeline(256);
+}