add parsing codes and lexing renames

- outline more sketch code for parsing
- rename Region

1 files changed, 38 insertions, 7 deletions

diff --git a/parse.c b/parse.c
index c1f1bb8..87af679 100644
--- a/parse.c
+++ b/parse.c
@@ -1,3 +1,5 @@
+#include <stdlib.h>
+
 #include "typeutils.h"
 #include "lex.h"
 
@@ -5,13 +7,15 @@ DECLARE_VEC(char*, StrVec)
 
 
 typedef struct {
-    TokenVec tokens;
+    Token* ptr;
+    size_t len;
     size_t pos;
 } TokStream;
 
 typedef enum {
     STDIN_REDIR,
-    STDOUT_REDIT,
+    STDOUT_REDIR_TRUNC,
+    STDOUT_REDIR_APPEND,
 } RedirKind;
 
 
@@ -19,14 +23,14 @@ typedef struct {
     RedirKind kind;
 
     union {
-        char* std_redir_filename;
+        Word std_redir_filename;
     } as;
 } Redirect;
 DECLARE_VEC(Redirect, RedirectVec)
 
 
 typedef struct {
-    StrVec args;
+    WordVec args;
     RedirectVec redirects;
     // TODO: prefix variable settings
 } Command;
@@ -48,21 +52,48 @@ typedef struct {
 DECLARE_VEC(PipelineElement, Pipeline)
 
 
+
 Command parse_command(TokStream* toks) {
-    StrVec args = make_StrVec(256);
+    WordVec args = make_WordVec(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)));
+        (curr_tok = toks->ptr[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) {
+            Token tok;
+            switch (curr_tok.as.spec) {
+                case WRITE_REDIR_TRUNC:
+                    toks->pos++;
+                    tok = toks->ptr[toks->pos];
+                    if(tok.kind != TOK_WORD) exit(1);
+                    push_to_RedirectVec(&redirects, (Redirect){.kind = STDOUT_REDIR_TRUNC, .as.std_redir_filename = tok.as.word});
+                    break;
+                case WRITE_REDIR_APPEND:
+                    toks->pos++;
+                    tok = toks->ptr[toks->pos];
+                    if(tok.kind != TOK_WORD) exit(1);
+                    push_to_RedirectVec(&redirects, (Redirect){.kind = STDOUT_REDIR_APPEND, .as.std_redir_filename = tok.as.word});
+                    break;
+                case READ_REDIR:
+                    toks->pos++;
+                    tok = toks->ptr[toks->pos];
+                    if(tok.kind != TOK_WORD) exit(1);
+                    push_to_RedirectVec(&redirects, (Redirect){.kind = STDOUT_REDIR_APPEND, .as.std_redir_filename = tok.as.word});
+                    break;
+                default:
+                    exit(69);
+            } 
+        } else  if (curr_tok.kind == TOK_WORD){
+            push_to_WordVec(&args, curr_tok.as.word);
         } 
     }
+    return (Command){.args = args, .redirects = redirects};
 }
 
 
 Pipeline parse_tokstream(TokenVec toks) {
-    TokStream tokstream = {.tokens = toks, .pos = 0};
+    TokStream tokstream = {.ptr = toks.items, .len = toks.count, .pos = 0};
     Pipeline result = make_Pipeline(256);
 }