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/* See LICENSE file for copyright and license details. */
#include "common.h"
void
push_end_of_file(struct parser_context *ctx)
{
push_semicolon(ctx, 1);
if (ctx->parser_state->parent || ctx->parser_state->ncommands)
ctx->premature_end_of_file = 1;
}
void
push_whitespace(struct parser_context *ctx, int strict)
{
if (ctx->parser_state->need_right_hand_side) {
if (strict)
eprintf("premature end of command\n");
return;
}
if (ctx->parser_state->current_argument) {
ctx->parser_state->arguments = erealloc(ctx->parser_state->arguments,
(ctx->parser_state->narguments + 1) *
sizeof(*ctx->parser_state->arguments));
ctx->parser_state->arguments[ctx->parser_state->narguments++] = ctx->parser_state->current_argument;
ctx->parser_state->current_argument = NULL;
ctx->parser_state->current_argument_end = NULL;
}
}
static void
push_command_terminal(struct parser_context *ctx, enum command_terminal terminal)
{
struct command *new_command;
push_whitespace(ctx, 1);
ctx->parser_state->commands = erealloc(ctx->parser_state->commands,
(ctx->parser_state->ncommands + 1) *
sizeof(*ctx->parser_state->commands));
new_command = ecalloc(1, sizeof(*new_command));
ctx->parser_state->commands[ctx->parser_state->ncommands++] = new_command;
new_command->terminal = terminal;
new_command->arguments = ctx->parser_state->arguments;
new_command->narguments = ctx->parser_state->narguments;
new_command->redirections = ctx->parser_state->redirections;
new_command->nredirections = ctx->parser_state->nredirections;
ctx->parser_state->arguments = NULL;
ctx->parser_state->narguments = 0;
ctx->parser_state->redirections = NULL;
ctx->parser_state->nredirections = 0;
if (!ctx->parser_state->parent) {
if (terminal == DOUBLE_SEMICOLON || terminal == SEMICOLON || terminal == AMPERSAND) {
/* TODO unless in a special construct such as while, case, for, if, or {, run and clear
* also require that any here-document is specified (count them and run when given);
* if terminal == AMPERSAND: perform </dev/null first, and reset exist status to 0
*/
}
}
}
void
push_semicolon(struct parser_context *ctx, int maybe)
{
if (!maybe || ctx->parser_state->narguments)
push_command_terminal(ctx, SEMICOLON);
}
static void
push_new_argument_part(struct parser_context *ctx, enum argument_type type)
{
struct argument *new_part;
new_part = ecalloc(1, sizeof(*new_part));
new_part->type = type;
new_part->line_number = ctx->tokeniser_line_number;
if (ctx->parser_state->current_argument_end) {
ctx->parser_state->current_argument_end->next_part = new_part;
ctx->parser_state->current_argument_end = new_part;
} else {
ctx->parser_state->current_argument = new_part;
ctx->parser_state->current_argument_end = new_part;
}
}
static void
push_redirection(struct parser_context *ctx, enum redirection_type type)
{
struct redirection *new_redirection;
struct argument *new_argument;
struct here_document *new_here_document;
new_redirection = ecalloc(1, sizeof(*new_redirection));
new_redirection->type = type;
ctx->parser_state->redirections = erealloc(ctx->parser_state->redirections,
(ctx->parser_state->nredirections + 1) *
sizeof(*ctx->parser_state->redirections));
ctx->parser_state->redirections[ctx->parser_state->nredirections++] = new_redirection;
if (ctx->parser_state->current_argument) {
if (ctx->parser_state->current_argument->type == REDIRECTION ||
ctx->parser_state->current_argument_end->type == QUOTED ||
ctx->parser_state->current_argument_end->type == QUOTE_EXPRESSION ||
type == REDIRECT_OUTPUT_AND_STDERR ||
type == REDIRECT_OUTPUT_AND_STDERR_APPEND ||
type == REDIRECT_OUTPUT_AND_STDERR_CLOBBER ||
type == REDIRECT_OUTPUT_AND_STDERR_TO_FD) {
push_whitespace(ctx, 1);
} else {
new_redirection->left_hand_side = ctx->parser_state->current_argument;
}
}
new_argument = ecalloc(1, sizeof(*new_argument));
new_argument->type = REDIRECTION;
new_argument->line_number = ctx->tokeniser_line_number;
ctx->parser_state->current_argument = new_argument;
if (type == HERE_DOCUMENT || type == HERE_DOCUMENT_INDENTED) {
new_here_document = emalloc(sizeof(*new_here_document));
new_here_document->redirection = new_redirection;
new_here_document->argument = new_argument;
new_here_document->next = NULL;
*ctx->here_documents_next = new_here_document;
ctx->here_documents_next = &new_here_document->next;
}
ctx->parser_state->need_right_hand_side = 1;
}
static void
push_shell_io(struct parser_context *ctx, enum argument_type type, enum tokeniser_mode mode)
{
push_mode(ctx, mode);
push_enter(ctx, type);
}
static void
push_function_mark(struct parser_context *ctx)
{
push_whitespace(ctx, 1);
push_new_argument_part(ctx, FUNCTION_MARK);
push_whitespace(ctx, 1);
}
size_t
push_symbol(struct parser_context *ctx, char *token, size_t token_len)
{
#define LIST_SYMBOLS(_)\
_("<<<", push_redirection(ctx, HERE_STRING))\
_("<<-", push_redirection(ctx, HERE_DOCUMENT_INDENTED))\
_("<>(", push_shell_io(ctx, PROCESS_SUBSTITUTION_INPUT_OUTPUT, NORMAL_MODE))\
_("<>|", push_command_terminal(ctx, SOCKET_PIPE))\
_("<>&", push_redirection(ctx, REDIRECT_INPUT_OUTPUT_TO_FD))\
_("&>>", push_redirection(ctx, REDIRECT_OUTPUT_AND_STDERR_APPEND))\
_("&>&", push_redirection(ctx, REDIRECT_OUTPUT_AND_STDERR_TO_FD))\
_("&>|", push_redirection(ctx, REDIRECT_OUTPUT_AND_STDERR_CLOBBER))\
_("()", push_function_mark(ctx))\
_("((", push_shell_io(ctx, ARITHMETIC_SUBSHELL, RRB_QUOTE_MODE))\
_(";;", push_command_terminal(ctx, DOUBLE_SEMICOLON))\
_("<(", push_shell_io(ctx, PROCESS_SUBSTITUTION_OUTPUT, NORMAL_MODE))\
_("<<", push_redirection(ctx, HERE_DOCUMENT))\
_("<>", push_redirection(ctx, REDIRECT_INPUT_OUTPUT))\
_("<&", push_redirection(ctx, REDIRECT_INPUT_TO_FD))\
_(">(", push_shell_io(ctx, PROCESS_SUBSTITUTION_INPUT, NORMAL_MODE))\
_(">>", push_redirection(ctx, REDIRECT_OUTPUT_APPEND))\
_(">&", push_redirection(ctx, REDIRECT_OUTPUT_TO_FD))\
_(">|", push_redirection(ctx, REDIRECT_OUTPUT_CLOBBER))\
_("||", push_command_terminal(ctx, OR))\
_("|&", push_command_terminal(ctx, PIPE_AMPERSAND))\
_("&&", push_command_terminal(ctx, AND))\
_("&|", push_command_terminal(ctx, PIPE_AMPERSAND)) /* synonym for |& to match &> */\
_("&>", push_redirection(ctx, REDIRECT_OUTPUT_AND_STDERR))\
_("(", push_shell_io(ctx, SUBSHELL, NORMAL_MODE))\
_(";", push_semicolon(ctx, 0))\
_("<", push_redirection(ctx, REDIRECT_INPUT))\
_(">", push_redirection(ctx, REDIRECT_OUTPUT))\
_("|", push_command_terminal(ctx, PIPE))\
_("&", push_command_terminal(ctx, AMPERSAND))
#define X(SYMBOL, ACTION)\
if (token_len >= sizeof(SYMBOL) - 1 && !strncmp(token, SYMBOL, sizeof(SYMBOL) - 1)) {\
ACTION;\
return token_len;\
}
LIST_SYMBOLS(X)
#undef X
push_unquoted(ctx, token, 1);
return 1;
}
static void
push_text(struct parser_context *ctx, char *text, size_t text_len, enum argument_type type)
{
struct argument *arg_part;
ctx->parser_state->need_right_hand_side = 0;
if (!ctx->parser_state->current_argument_end ||
ctx->parser_state->current_argument_end->type != type ||
ctx->parser_state->current_argument_end->line_number != ctx->tokeniser_line_number)
push_new_argument_part(ctx, type);
arg_part = ctx->parser_state->current_argument_end;
arg_part->text = erealloc(arg_part->text, arg_part->length + text_len + 1);
memcpy(&arg_part->text[arg_part->length], text, text_len);
arg_part->length += text_len;
arg_part->text[arg_part->length] = '\0';
}
void
push_quoted(struct parser_context *ctx, char *text, size_t text_len)
{
push_text(ctx, text, text_len, QUOTED);
}
void
push_escaped(struct parser_context *ctx, char *text, size_t text_len)
{
/* TODO resolve backslashes in text */
push_text(ctx, text, text_len, QUOTED);
}
void
push_unquoted(struct parser_context *ctx, char *text, size_t text_len)
{
push_text(ctx, text, text_len, UNQUOTED);
}
void
push_enter(struct parser_context *ctx, enum argument_type type)
{
struct parser_state *new_state;
ctx->parser_state->need_right_hand_side = 0;
push_new_argument_part(ctx, type);
new_state = ecalloc(1, sizeof(*new_state));
new_state->parent = ctx->parser_state;
ctx->parser_state->current_argument_end->child = new_state;
ctx->parser_state = new_state;
}
void
push_leave(struct parser_context *ctx)
{
if (ctx->mode_stack->mode == NORMAL_MODE)
push_semicolon(ctx, 1);
/* TODO else if (ctx->mode_stack->mode == BQ_QUOTE_MODE), parse content */
/* TODO validate subshell content */
ctx->parser_state = ctx->parser_state->parent;
}
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