+++ /dev/null
-/*
- * Copyright Droids Corporation (2007)
- * Olivier MATZ <zer0@droids-corp.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Revision : $Id: parse.c,v 1.1.2.11 2009-04-07 20:00:46 zer0 Exp $
- *
- *
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <inttypes.h>
-#include <ctype.h>
-
-#include <aversive/pgmspace.h>
-
-#include "parse.h"
-
-#ifdef HOST_VERSION
-#define pgm_read_pgmptr(x) ((void *)(*(x)))
-#else
-#define pgm_read_pgmptr(x) (void *)pgm_read_word(x)
-#endif
-
-//#define CMDLINE_DEBUG
-//#define debug_printf printf
-#define debug_printf(args...) do {} while(0)
-
-
-static int
-isendofline(char c)
-{
- if (c == '\n' ||
- c == '\r' )
- return 1;
- return 0;
-}
-
-static int
-iscomment(char c)
-{
- if (c == '#')
- return 1;
- return 0;
-}
-
-int
-isendoftoken(char c)
-{
- if (!c || iscomment(c) || isblank(c) || isendofline(c))
- return 1;
- return 0;
-}
-
-static uint8_t
-nb_common_chars(const char * s1, const char * s2)
-{
- uint8_t i=0;
-
- while (*s1==*s2 && *s1 && *s2) {
- s1++;
- s2++;
- i++;
- }
- return i;
-}
-
-/**
- * try to match the buffer with an instruction (only the first
- * nb_match_token tokens if != 0). Return 0 if we match all the
- * tokens, else the number of matched tokens, else -1.
- */
-static int8_t
-match_inst(parse_pgm_inst_t *inst, const char * buf, uint8_t nb_match_token,
- void * result_buf)
-{
- uint8_t token_num=0;
- parse_pgm_token_hdr_t * token_p;
- uint8_t i=0;
- int8_t n = 0;
- struct token_hdr token_hdr;
-
- token_p = (parse_pgm_token_hdr_t *)pgm_read_pgmptr(&inst->tokens[token_num]);
- if (token_p)
- memcpy_P(&token_hdr, token_p, sizeof(token_hdr));
-
- /* check if we match all tokens of inst */
- while (token_p && (!nb_match_token || i<nb_match_token)) {
- debug_printf("TK\n");
- /* skip spaces */
- while (isblank(*buf)) {
- buf++;
- }
-
- /* end of buf */
- if ( isendofline(*buf) || iscomment(*buf) )
- break;
-
- n = token_hdr.ops->parse(token_p, buf, (result_buf ? result_buf+token_hdr.offset : NULL));
- if ( n < 0 )
- break;
- debug_printf("TK parsed (len=%d)\n", n);
- i++;
- buf += n;
-
- token_num ++;
- token_p = (parse_pgm_token_hdr_t *)pgm_read_pgmptr(&inst->tokens[token_num]);
- if (token_p)
- memcpy_P(&token_hdr, token_p, sizeof(token_hdr));
- }
-
- /* does not match */
- if (i==0)
- return -1;
-
- /* in case we want to match a specific num of token */
- if (nb_match_token) {
- if (i == nb_match_token) {
- return 0;
- }
- return i;
- }
-
- /* we don't match all the tokens */
- if (token_p) {
- return i;
- }
-
- /* are there are some tokens more */
- while (isblank(*buf)) {
- buf++;
- }
-
- /* end of buf */
- if ( isendofline(*buf) || iscomment(*buf) )
- return 0;
-
- /* garbage after inst */
- return i;
-}
-
-
-int8_t
-parse(parse_pgm_ctx_t ctx[], const char * buf)
-{
- uint8_t inst_num=0;
- parse_pgm_inst_t * inst;
- const char * curbuf;
- char result_buf[256]; /* XXX align, size zé in broblém */
- void (*f)(void *, void *) = NULL;
- void * data = NULL;
- int comment = 0;
- int linelen = 0;
- int parse_it = 0;
- int8_t err = PARSE_NOMATCH;
- int8_t tok;
-#ifdef CMDLINE_DEBUG
- char debug_buf[64];
-#endif
-
- /*
- * - look if the buffer contains at least one line
- * - look if line contains only spaces or comments
- * - count line length
- */
- curbuf = buf;
- while (! isendofline(*curbuf)) {
- if ( *curbuf == '\0' ) {
- debug_printf("Incomplete buf (len=%d)\n", linelen);
- return 0;
- }
- if ( iscomment(*curbuf) ) {
- comment = 1;
- }
- if ( ! isblank(*curbuf) && ! comment) {
- parse_it = 1;
- }
- curbuf++;
- linelen++;
- }
-
- /* skip all endofline chars */
- while (isendofline(buf[linelen])) {
- linelen++;
- }
-
- /* empty line */
- if ( parse_it == 0 ) {
- debug_printf("Empty line (len=%d)\n", linelen);
- return linelen;
- }
-
-#ifdef CMDLINE_DEBUG
- snprintf(debug_buf, (linelen>64 ? 64 : linelen), "%s", buf);
- debug_printf("Parse line : len=%d, <%s>\n", linelen, debug_buf);
-#endif
-
- /* parse it !! */
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
- while (inst) {
- debug_printf("INST\n");
-
- /* fully parsed */
- tok = match_inst(inst, buf, 0, result_buf);
-
- if (tok > 0) /* we matched at least one token */
- err = PARSE_BAD_ARGS;
-
- else if (!tok) {
- debug_printf("INST fully parsed\n");
- /* skip spaces */
- while (isblank(*curbuf)) {
- curbuf++;
- }
-
- /* if end of buf -> there is no garbage after inst */
- if (isendofline(*curbuf) || iscomment(*curbuf)) {
- if (!f) {
- memcpy_P(&f, &inst->f, sizeof(f));
- memcpy_P(&data, &inst->data, sizeof(data));
- }
- else {
- /* more than 1 inst matches */
- err = PARSE_AMBIGUOUS;
- f=NULL;
- debug_printf("Ambiguous cmd\n");
- break;
- }
- }
- }
-
- inst_num ++;
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
- }
-
- /* call func */
- if (f) {
- f(result_buf, data);
- }
-
- /* no match */
- else {
- debug_printf("No match err=%d\n", err);
- return err;
- }
-
- return linelen;
-}
-
-int8_t
-complete(parse_pgm_ctx_t ctx[], const char *buf, int16_t *state,
- char *dst, uint8_t size)
-{
- const char * incomplete_token = buf;
- uint8_t inst_num = 0;
- parse_pgm_inst_t *inst;
- parse_pgm_token_hdr_t *token_p;
- struct token_hdr token_hdr;
- char tmpbuf[64], completion_buf[64];
- uint8_t incomplete_token_len;
- int8_t completion_len = -1;
- int8_t nb_token = 0;
- uint8_t i, n;
- int8_t l;
- uint8_t nb_completable;
- uint8_t nb_non_completable;
- int16_t local_state=0;
- prog_char *help_str;
-
- debug_printf("%s called\n", __FUNCTION__);
- /* count the number of complete token to parse */
- for (i=0 ; buf[i] ; i++) {
- if (!isblank(buf[i]) && isblank(buf[i+1]))
- nb_token++;
- if (isblank(buf[i]) && !isblank(buf[i+1]))
- incomplete_token = buf+i+1;
- }
- incomplete_token_len = strlen(incomplete_token);
-
- /* first call -> do a first pass */
- if (*state <= 0) {
- debug_printf("try complete <%s>\n", buf);
- debug_printf("there is %d complete tokens, <%s> is incomplete\n", nb_token, incomplete_token);
-
- nb_completable = 0;
- nb_non_completable = 0;
-
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
- while (inst) {
- /* parse the first tokens of the inst */
- if (nb_token && match_inst(inst, buf, nb_token, NULL))
- goto next;
-
- debug_printf("instruction match \n");
- token_p = (parse_pgm_token_hdr_t *) pgm_read_pgmptr(&inst->tokens[nb_token]);
- if (token_p)
- memcpy_P(&token_hdr, token_p, sizeof(token_hdr));
-
- /* non completable */
- if (!token_p ||
- !token_hdr.ops->complete_get_nb ||
- !token_hdr.ops->complete_get_elt ||
- (n = token_hdr.ops->complete_get_nb(token_p)) == 0) {
- nb_non_completable++;
- goto next;
- }
-
- debug_printf("%d choices for this token\n", n);
- for (i=0 ; i<n ; i++) {
- if (token_hdr.ops->complete_get_elt(token_p, i, tmpbuf, sizeof(tmpbuf)) < 0)
- continue;
- strcat_P(tmpbuf, PSTR(" ")); /* we have at least room for one char */
- debug_printf(" choice <%s>\n", tmpbuf);
- /* does the completion match the beginning of the word ? */
- if (!strncmp(incomplete_token, tmpbuf, incomplete_token_len)) {
- if (completion_len == -1) {
- strcpy(completion_buf, tmpbuf+incomplete_token_len);
- completion_len = strlen(tmpbuf+incomplete_token_len);
-
- }
- else {
- completion_len = nb_common_chars(completion_buf,
- tmpbuf+incomplete_token_len);
- completion_buf[completion_len] = 0;
- }
- nb_completable++;
- }
- }
- next:
- inst_num ++;
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
- }
-
- debug_printf("total choices %d for this completion\n", nb_completable);
-
- /* no possible completion */
- if (nb_completable == 0 && nb_non_completable == 0)
- return 0;
-
- /* if multichoice is not required */
- if (*state == 0 && incomplete_token_len > 0) {
- /* one or several choices starting with the
- same chars */
- if (completion_len > 0) {
- if (completion_len + 1 > size)
- return 0;
-
- strcpy(dst, completion_buf);
- return 2;
- }
- }
- }
-
- /* init state correctly */
- if (*state == -1)
- *state = 0;
-
- debug_printf("Multiple choice STATE=%d\n", *state);
-
- inst_num = 0;
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
- while (inst) {
- /* we need to redo it */
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
-
- if (nb_token && match_inst(inst, buf, nb_token, NULL))
- goto next2;
-
- token_p = (parse_pgm_token_hdr_t *)pgm_read_pgmptr(&inst->tokens[nb_token]);
- if (token_p)
- memcpy_P(&token_hdr, token_p, sizeof(token_hdr));
-
- /* one choice for this token */
- if (!token_p ||
- !token_hdr.ops->complete_get_nb ||
- !token_hdr.ops->complete_get_elt ||
- (n = token_hdr.ops->complete_get_nb(token_p)) == 0) {
- if (local_state < *state) {
- local_state++;
- goto next2;
- }
- (*state)++;
- if (token_p && token_hdr.ops->get_help) {
- token_hdr.ops->get_help(token_p, tmpbuf, sizeof(tmpbuf));
- help_str = (prog_char *) pgm_read_pgmptr(&inst->help_str);
- if (help_str)
- snprintf_P(dst, size, PSTR("[%s]: "PGMS_FMT""), tmpbuf, help_str);
- else
- snprintf_P(dst, size, PSTR("[%s]: No help"), tmpbuf);
- }
- else {
- snprintf_P(dst, size, PSTR("[RETURN]"));
- }
- return 1;
- }
-
- /* several choices */
- for (i=0 ; i<n ; i++) {
- if (token_hdr.ops->complete_get_elt(token_p, i, tmpbuf, sizeof(tmpbuf)) < 0)
- continue;
- strcat_P(tmpbuf, PSTR(" ")); /* we have at least room for one char */
- debug_printf(" choice <%s>\n", tmpbuf);
- /* does the completion match the beginning of the word ? */
- if (!strncmp(incomplete_token, tmpbuf, incomplete_token_len)) {
- if (local_state < *state) {
- local_state++;
- continue;
- }
- (*state)++;
- l=snprintf(dst, size, "%s", tmpbuf);
- if (l>=0 && token_hdr.ops->get_help) {
- token_hdr.ops->get_help(token_p, tmpbuf, sizeof(tmpbuf));
- help_str = (prog_char *) pgm_read_pgmptr(&inst->help_str);
- if (help_str)
- snprintf_P(dst+l, size-l, PSTR("[%s]: "PGMS_FMT), tmpbuf, help_str);
- else
- snprintf_P(dst+l, size-l, PSTR("[%s]: No help"), tmpbuf);
- }
-
- return 1;
- }
- }
- next2:
- inst_num ++;
- inst = (parse_pgm_inst_t *)pgm_read_pgmptr(ctx+inst_num);
- }
- return 0;
-}
-
git.droids-corp.org / protos / xbee-avr.git / blobdiff