parse.c


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#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);
}