#include <ctype.h>
#include <termios.h>
#include <errno.h>
+#include <stdarg.h>
#include <netinet/in.h>
#include "cmdline_parse.h"
#include "cmdline.h"
-//#define CMDLINE_DEBUG
//#define debug_printf printf
#define debug_printf(args...) do {} while(0)
+/* used internally for cmdline_help() and cmdline_complete() */
+struct cmdline_preparse {
+ int nb_valid_tok; /* number of valid tokens in the buffer */
+ void *opaque; /* pointer to opaque data */
+ char comp_tok_buf[CMDLINE_MAX_TOKEN_SIZE]; /* token to complete */
+ int comp_tok_len; /* length of the token to complete */
+ int comp_tok_offset; /* offset of token to complete in the line buf */
+};
+
/* isblank() needs _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE, so use our
* own. */
static int
return s;
}
-/* remove quote and stop when we reach the end of token */
-// XXX ret val comment
-int cmdline_unquote_token(char *dst, unsigned dstlen,
- const char *src)
+/* Remove quote and stop when we reach the end of token. Return the
+ * number of "eaten" bytes from the source buffer, or a negative value
+ * on error */
+int cmdline_get_token(char *dst, unsigned dstlen, const char *src)
{
unsigned s = 0, d = 0;
int quoted = 0;
+ /* skip spaces */
+ while (isblank2(src[s]))
+ s++;
+
+ /* empty token */
+ if (cmdline_isendoftoken(src[s]))
+ return -EINVAL;
+
+ /* copy token and remove quotes */
while (src[s] != '\0') {
if (d >= dstlen)
return -EMSGSIZE;
dst[d++] = src[s++];
}
+ /* not enough room in dst buffer */
+ if (d >= (dstlen-1))
+ return -EMSGSIZE;
+
+ /* end of string during quote */
if (quoted)
return -EINVAL;
- if (d >= (dstlen-1))
- return -EMSGSIZE;
dst[d++] = '\0';
return s;
}
-/**
+/* return the nth token from src and copy it in dst. Return the offset
+ * of the token in src, or a negative value on error. Note: the index
+ * of the first token is 0. */
+static int cmdline_get_nth_token(char *dst, unsigned dstlen, int n,
+ const char *src)
+{
+ int ret = 0, offset = 0;
+
+ do {
+ offset += ret;
+
+ /* skip spaces */
+ while (isblank2(src[offset]))
+ offset++;
+
+ /* get the token starting at offset */
+ ret = cmdline_get_token(dst, dstlen, src + offset);
+ if (ret < 0)
+ return ret;
+
+ } while (n--);
+
+ return offset;
+}
+
+/*
* 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.
+
+retval à vérifier.
+
*/
static int
-match_inst(cmdline_parse_inst_t *inst, const char *buf,
+match_inst(cmdline_parse_inst_t *inst, const char *linebuf,
unsigned int nb_match_token, void *resbuf, unsigned resbuf_size)
{
- unsigned int token_num=0;
- cmdline_parse_token_hdr_t * token_p;
- unsigned int i=0;
+ unsigned int token_num = 0;
+ cmdline_parse_token_hdr_t *token;
int n = 0, res;
- struct cmdline_token_hdr token_hdr;
- char token_str[128];
+ char token_str[CMDLINE_MAX_TOKEN_SIZE];
- token_p = inst->tokens[token_num];
- if (token_p)
- memcpy(&token_hdr, token_p, sizeof(token_hdr));
+ token = inst->tokens[token_num];
/* check if we match all tokens of inst */
- while (token_p && (!nb_match_token || i<nb_match_token)) {
+ while (token) {
+
+ /* we matched enough tokens, return success */
+ if (nb_match_token != 0 && token_num >= nb_match_token)
+ return 0;
+
debug_printf("TK\n");
- /* skip spaces */
- while (isblank2(*buf)) {
- buf++;
- }
- /* end of buf */
- if ( isendofline(*buf) || iscomment(*buf) )
+ /* copy token and remove quotes */
+ n = cmdline_get_token(token_str, sizeof(token_str), linebuf);
+ if (n < 0)
break;
- n = cmdline_unquote_token(token_str, sizeof(token_str), buf);
- if (n == -EINVAL)
- return -EINVAL;
-
+ /* parse this token */
if (resbuf == NULL)
- res = token_hdr.ops->parse(token_p, token_str, NULL, 0);
+ res = token->ops->parse(token, token_str, NULL, 0);
else {
unsigned rb_sz;
- void *rb = (char *)resbuf + token_hdr.offset;
- if (token_hdr.offset > resbuf_size)
+ void *rb = (char *)resbuf + token->offset;
+
+ /* not enough room to store result */
+ if (token->offset > resbuf_size)
return -ENOBUFS;
- rb_sz = resbuf_size - token_hdr.offset;
- res = token_hdr.ops->parse(token_p, token_str,
- rb, rb_sz);
+
+ rb_sz = resbuf_size - token->offset;
+ res = token->ops->parse(token, token_str, rb, rb_sz);
}
+ /* does not match this token */
if (res < 0)
break;
debug_printf("TK parsed (len=%d)\n", n);
- i++;
- buf += n;
-
+ linebuf += n;
token_num ++;
- token_p = inst->tokens[token_num];
- if (token_p)
- memcpy(&token_hdr, token_p, sizeof(token_hdr));
+ token = inst->tokens[token_num];
}
/* does not match */
- if (i==0)
+ if (token_num == 0)
return -ENOENT;
- /* 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;
- }
+ if (token)
+ return token_num;
/* are there are some tokens more */
- while (isblank2(*buf)) {
- buf++;
- }
+ while (isblank2(*linebuf))
+ linebuf++;
- /* end of buf */
- if ( isendofline(*buf) || iscomment(*buf) )
+ /* end of buf, we match all inst */
+ if (isendofline(*linebuf) || iscomment(*linebuf))
return 0;
/* garbage after inst */
- return i;
+ return token_num;
}
-int
-cmdline_parse(struct cmdline *cl, const char * buf)
+/* Check if a line buffer is valid and can be parsed or completed. The
+ * parsing stops when \n or \0 is reached. The also function checks
+ * that tokens are correctly quoted. The number of tokens in the
+ * buffer is returned. */
+static int cmdline_validate_linebuf(const char *linebuf)
{
- unsigned int inst_num=0;
- cmdline_parse_inst_t *inst;
- const char *curbuf;
- char result_buf[CMDLINE_MAX_DSTBUF_SIZE];
- void (*f)(void *, struct cmdline *, void *) = NULL;
- void *data = NULL;
- int comment = 0;
- int linelen = 0;
- int parse_it = 0;
- int err = CMDLINE_PARSE_NOMATCH;
- int tok;
- cmdline_parse_ctx_t *ctx = cl->ctx;
-#ifdef CMDLINE_DEBUG
- char debug_buf[BUFSIZ];
-#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;
+ int quoted = 0, comment = 0;
+ int i = 0, nbtok = 0, token = 0;
+
+ while (linebuf[i] != '\0') {
+ if (isendofline(linebuf[i]) && quoted == 0)
+ break;
+ if (comment == 1) {
+ i++;
+ continue;
}
- if ( iscomment(*curbuf) ) {
+ if (iscomment(linebuf[i]) && quoted == 0) {
comment = 1;
+ i ++;
+ continue;
}
- if ( ! isblank2(*curbuf) && ! comment) {
- parse_it = 1;
+
+ /* end of token */
+ if (isblank2(linebuf[i]) && quoted == 0)
+ token = 0;
+ /* new token */
+ if (!isblank2(linebuf[i]) && token == 0) {
+ token = 1;
+ nbtok++;
}
- curbuf++;
- linelen++;
- }
- /* skip all endofline chars */
- while (isendofline(buf[linelen])) {
- linelen++;
+ if (linebuf[i] == '\\' && linebuf[i+1] == '"') {
+ i += 2;
+ continue;
+ }
+ if (linebuf[i] == '\\' && linebuf[i+1] == '\\') {
+ i += 2;
+ continue;
+ }
+ if (linebuf[i] == '"') {
+ i++;
+ quoted = !quoted;
+ continue;
+ }
+ i++;
}
+ if (quoted)
+ return CMDLINE_PARSE_UNTERMINATED_QUOTE;
+ return nbtok;
+}
- /* empty line */
- if ( parse_it == 0 ) {
- debug_printf("Empty line (len=%d)\n", linelen);
- return linelen;
- }
+/* Try to parse a buffer according to the specified context. The
+ * argument linebuf must end with \n or \0. */
+int
+cmdline_parse(cmdline_parse_ctx_t *ctx, const char *linebuf, void *opaque)
+{
+ cmdline_parse_inst_t **pinst;
+ cmdline_parse_inst_t *inst;
+ char result_buf[CMDLINE_MAX_DSTBUF_SIZE];
+ void (*f)(void *, struct cmdline *, void *) = NULL;
+ void *data = NULL;
+ int ret;
+
+ ret = cmdline_validate_linebuf(linebuf);
+ if (ret < 0)
+ return ret;
+ if (ret == 0)
+ return CMDLINE_PARSE_EMPTY;
-#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 = ctx[inst_num];
- while (inst) {
- debug_printf("INST %d\n", inst_num);
+ for (pinst = &ctx->insts[0]; *pinst != NULL; pinst++) {
+ inst = *pinst;
+ debug_printf("INST\n");
/* fully parsed */
- tok = match_inst(inst, buf, 0, result_buf, sizeof(result_buf));
+ ret = match_inst(inst, linebuf, 0, result_buf, sizeof(result_buf));
- if (tok > 0) /* we matched at least one token */
- err = CMDLINE_PARSE_BAD_ARGS;
+ if (ret != 0)
+ continue;
- else if (!tok) {
- debug_printf("INST fully parsed\n");
- /* skip spaces */
- while (isblank2(*curbuf)) {
- curbuf++;
- }
+ debug_printf("INST fully parsed\n");
- /* if end of buf -> there is no garbage after inst */
- if (isendofline(*curbuf) || iscomment(*curbuf)) {
- if (!f) {
- memcpy(&f, &inst->f, sizeof(f));
- memcpy(&data, &inst->data, sizeof(data));
- }
- else {
- /* more than 1 inst matches */
- err = CMDLINE_PARSE_AMBIGUOUS;
- f=NULL;
- debug_printf("Ambiguous cmd\n");
- break;
- }
- }
+ /* if end of buf -> there is no garbage after inst */
+ if (f != NULL) {
+ /* more than 1 inst matches */
+ debug_printf("Ambiguous cmd\n");
+ return CMDLINE_PARSE_AMBIGUOUS;
}
- else if (tok == -EINVAL) {
- err = CMDLINE_PARSE_UNTERMINATED_QUOTE;
- f = NULL;
- debug_printf("Unterminated quote\n");
- break;
- }
-
- inst_num ++;
- inst = ctx[inst_num];
+ f = inst->f;
+ data = inst->data;
}
/* call func */
- if (f) {
- f(result_buf, cl, data);
- }
+ if (f == NULL)
+ return CMDLINE_PARSE_NOMATCH;
- /* no match */
+ f(result_buf, opaque, data);
+ return CMDLINE_PARSE_SUCCESS;
+}
+
+/* called by cmdline_help() and cmdline_complete() to preparse the
+ * line buffer (the operations done are common to these functions) */
+static int cmdline_preparse(struct cmdline_preparse *preparse, const char *buf)
+{
+ int ret, len, nb_tok;
+
+ /* count the number of tokens in the line buffer */
+ ret = cmdline_validate_linebuf(buf);
+ if (ret < 0)
+ return ret;
+ nb_tok = ret;
+
+ /* if last token is not complete, decrement nb_valid_tok */
+ len = strlen(buf);
+ if (nb_tok == 0 || isblank2(buf[len - 1])) {
+ preparse->nb_valid_tok = nb_tok;
+ preparse->comp_tok_offset = len;
+ preparse->comp_tok_buf[0] = '\0';
+ preparse->comp_tok_len = 0;
+ }
else {
- debug_printf("No match err=%d\n", err);
- return err;
+ preparse->nb_valid_tok = nb_tok - 1;
+
+ /* get the incomplete token (can be empty) and return its
+ * offset in the buffer */
+ preparse->comp_tok_offset =
+ cmdline_get_nth_token(preparse->comp_tok_buf,
+ sizeof(preparse->comp_tok_buf),
+ preparse->nb_valid_tok,
+ buf);
+ preparse->comp_tok_len = strlen(preparse->comp_tok_buf);
}
- return linelen;
+ return 0;
}
-int
-cmdline_complete(struct cmdline *cl, const char *buf, int *state,
- char *dst, unsigned int size)
+/* Display a contextual help using the write_buf() function pointer
+ * given as parameter (called with its opaque pointer). The contextual
+ * help depends on the buffer given. */
+int cmdline_help(cmdline_parse_ctx_t *ctx, const char *buf,
+ cmdline_write_t *write_buf, void *opaque)
{
- const char *partial_tok = buf;
- unsigned int inst_num = 0;
+ cmdline_parse_token_hdr_t *token;
+ cmdline_parse_inst_t **pinst;
cmdline_parse_inst_t *inst;
- cmdline_parse_token_hdr_t *token_p;
- struct cmdline_token_hdr token_hdr;
- char tmpbuf[64], comp_buf[64];
- unsigned int partial_tok_len;
- int comp_len = -1;
- int nb_token = 0;
- unsigned int i, n;
- int l;
- unsigned int nb_completable;
- unsigned int nb_non_completable;
- int local_state = 0;
+ struct cmdline_preparse preparse;
+ char helpbuf[CMDLINE_MAX_DSTBUF_SIZE];
+ char tmpbuf[CMDLINE_MAX_DSTBUF_SIZE];
char *help_str;
- cmdline_parse_ctx_t *ctx = cl->ctx;
+ int n, len, iterate;
- debug_printf("%s called\n", __FUNCTION__);
- memset(&token_hdr, 0, sizeof(token_hdr));
-
- /* count the number of complete token to parse */
- for (i=0 ; buf[i] ; i++) {
- if (!isblank2(buf[i]) && isblank2(buf[i+1]))
- nb_token++;
- if (isblank2(buf[i]) && !isblank2(buf[i+1]))
- partial_tok = buf+i+1;
- }
- partial_tok_len = strlen(partial_tok);
-
- /* 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, partial_tok);
-
- nb_completable = 0;
- nb_non_completable = 0;
-
- inst = ctx[inst_num];
- while (inst) {
- /* parse the first tokens of the inst */
- if (nb_token && match_inst(inst, buf, nb_token, NULL, 0))
- goto next;
-
- debug_printf("instruction match \n");
- token_p = inst->tokens[nb_token];
- if (token_p)
- memcpy(&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;
- }
+ cmdline_preparse(&preparse, buf);
- 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;
+ debug_printf("display contextual help\n");
- /* we have at least room for one char */
- strcat(tmpbuf, " ");
+ for (pinst = &ctx->insts[0]; *pinst != NULL; pinst++) {
+ inst = *pinst;
- debug_printf(" choice <%s>\n", tmpbuf);
-
- /* does the completion match the
- * beginning of the word ? */
- if (!strncmp(partial_tok, tmpbuf,
- partial_tok_len)) {
- if (comp_len == -1) {
- strcpy(comp_buf,
- tmpbuf + partial_tok_len);
- comp_len =
- strlen(tmpbuf +
- partial_tok_len);
-
- }
- else {
- comp_len =
- nb_common_chars(comp_buf,
- tmpbuf+partial_tok_len);
- comp_buf[comp_len] = 0;
- }
- nb_completable++;
- }
- }
- next:
- inst_num ++;
- inst = ctx[inst_num];
+ /* match the beginning of the command */
+ if (preparse.nb_valid_tok != 0 &&
+ match_inst(inst, buf, preparse.nb_valid_tok,
+ NULL, 0) != 0)
+ continue;
+
+ token = inst->tokens[preparse.nb_valid_tok];
+
+ /* end of inst */
+ if (token == NULL) {
+ n = snprintf(helpbuf, sizeof(helpbuf), "[RETURN]\n");
+ if (n > 0)
+ write_buf(opaque, helpbuf, n);
+ continue;
}
- debug_printf("total choices %d for this completion\n",
- nb_completable);
+ /* token matches, but no completion */
+ if (token->ops->complete_start == NULL ||
+ token->ops->complete_iterate == NULL)
+ iterate = 0;
+ else
+ iterate = 1;
+
+ if (iterate == 1 &&
+ token->ops->complete_start(token, &preparse.opaque) < 0) {
+ /* cancel iteration, complete_start() returned
+ * a negative value, meaning no completion */
+ iterate = 0;
+ if (token->ops->complete_end != NULL)
+ token->ops->complete_end(token,
+ &preparse.opaque);
+ }
- /* no possible completion */
- if (nb_completable == 0 && nb_non_completable == 0)
- return 0;
+ if (iterate == 0) {
+ /* get token dynamic help string */
+ if ((token->ops->help == NULL) ||
+ (token->ops->help(token, tmpbuf, sizeof(tmpbuf)) < 0))
+ snprintf(tmpbuf, sizeof(tmpbuf), "unknown");
- /* if multichoice is not required */
- if (*state == 0 && partial_tok_len > 0) {
- /* one or several choices starting with the
- same chars */
- if (comp_len > 0) {
- if ((unsigned)(comp_len + 1) > size)
- return 0;
+ /* get instruction static help string */
+ help_str = inst->help_str;
+ if (help_str == NULL)
+ help_str = "No help";
- strcpy(dst, comp_buf);
- return 2;
- }
+ /* send it to callback function */
+ n = snprintf(helpbuf, sizeof(helpbuf),
+ "[%s]: %s\n", tmpbuf, help_str);
+ if (n >= 0)
+ write_buf(opaque, helpbuf, n);
+
+ continue;
}
+
+
+ /* iterate over all possible completion for this inst */
+ while (token->ops->complete_iterate(token,
+ &preparse.opaque,
+ tmpbuf,
+ sizeof(tmpbuf)) == 0) {
+
+
+ debug_printf(" choice <%s>\n", tmpbuf);
+
+ /* does the completion match the beginning of
+ * the word ? */
+ if (strncmp(preparse.comp_tok_buf, tmpbuf,
+ preparse.comp_tok_len))
+ continue;
+
+ /* get the token and add it in help buffer */
+ n = snprintf(helpbuf, sizeof(helpbuf), "%s ", tmpbuf);
+ if (n < 0 || n >= sizeof(helpbuf))
+ continue;
+ len = n;
+
+ /* get token dynamic help */
+ if ((token->ops->help == NULL) ||
+ (token->ops->help(token, tmpbuf, sizeof(tmpbuf)) < 0))
+ snprintf(tmpbuf, sizeof(tmpbuf), "unknown");
+
+ /* get instruction static help string */
+ help_str = inst->help_str;
+ if (help_str == NULL)
+ help_str = "No help";
+
+ /* send it to callback function */
+ n = snprintf(helpbuf + len, sizeof(helpbuf) - len,
+ "[%s]: %s\n", tmpbuf, help_str);
+ if (n >= 0)
+ write_buf(opaque, helpbuf, n + len);
+ }
+
+ /* no more completion, go to next inst */
+ if (token->ops->complete_end != NULL)
+ token->ops->complete_end(token, &preparse.opaque);
}
- /* init state correctly */
- if (*state == -1)
- *state = 0;
-
- debug_printf("Multiple choice STATE=%d\n", *state);
-
- inst_num = 0;
- inst = ctx[inst_num];
- while (inst) {
- /* we need to redo it */
- inst = ctx[inst_num];
-
- if (nb_token && match_inst(inst, buf, nb_token, NULL, 0))
- goto next2;
-
- token_p = inst->tokens[nb_token];
- if (token_p)
- memcpy(&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 = inst->help_str;
- if (help_str)
- snprintf(dst, size, "[%s]: %s", tmpbuf,
- help_str);
- else
- snprintf(dst, size, "[%s]: No help",
- tmpbuf);
- }
- else {
- snprintf(dst, size, "[RETURN]");
- }
- return 1;
+ return 0;
+}
+
+/* try to complete the buffer given as a parameter */
+int
+cmdline_complete(cmdline_parse_ctx_t *ctx, const char *buf,
+ char *dst, unsigned int dstsize)
+{
+ cmdline_parse_token_hdr_t *token;
+ cmdline_parse_inst_t **pinst;
+ cmdline_parse_inst_t *inst;
+ struct cmdline_preparse preparse;
+ int nb_match = 0;
+ int nb_completion = 0;
+ int completion_len = CMDLINE_MAX_TOKEN_SIZE;
+ char completion_buf[CMDLINE_MAX_TOKEN_SIZE];
+ char tmpbuf[CMDLINE_MAX_TOKEN_SIZE];
+ int ret, n;
+
+ debug_printf("%s called\n", __FUNCTION__);
+
+ /* fill the preparse structure that contains infos that will
+ * help us to complete the buffer */
+ ret = cmdline_preparse(&preparse, buf);
+ if (ret < 0)
+ return CMDLINE_COMPLETE_NONE;
+
+ /* try to complete !! */
+ for (pinst = &ctx->insts[0]; *pinst != NULL; pinst++) {
+ inst = *pinst;
+
+ debug_printf("INST\n");
+
+ /* try to match the first tokens */
+ if (preparse.nb_valid_tok != 0 &&
+ match_inst(inst, buf, preparse.nb_valid_tok,
+ NULL, 0) != 0)
+ continue;
+
+ nb_match ++;
+ token = inst->tokens[preparse.nb_valid_tok];
+
+ /* non completable */
+ if (token == NULL ||
+ token->ops->complete_start == NULL ||
+ token->ops->complete_iterate == NULL)
+ continue;
+
+ /* non completable */
+ if (token->ops->complete_start(token, &preparse.opaque) < 0) {
+ if (token->ops->complete_end != NULL)
+ token->ops->complete_end(token,
+ &preparse.opaque);
+ continue;
}
- /* several choices */
- for (i=0 ; i<n ; i++) {
- if (token_hdr.ops->complete_get_elt(token_p, i, tmpbuf,
- sizeof(tmpbuf)) < 0)
- continue;
- /* we have at least room for one char */
- strcat(tmpbuf, " ");
+ /* all possible completion for this token */
+ while (1) {
+
+ ret = token->ops->complete_iterate(token,
+ &preparse.opaque,
+ tmpbuf,
+ sizeof(tmpbuf)-1);
+
+ if (ret < 0)
+ break;
+
+ debug_printf("Completion %s\n", tmpbuf);
+
+ /* we kept at least the room for one char */
+ /* XXX to be updated for non-final completion */
+ if (ret == 0)
+ strcat(tmpbuf, " ");
debug_printf(" choice <%s>\n", tmpbuf);
/* does the completion match the beginning of
* the word ? */
- if (!strncmp(partial_tok, tmpbuf,
- partial_tok_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 = inst->help_str;
- if (help_str)
- snprintf(dst+l, size-l, "[%s]: %s",
- tmpbuf, help_str);
- else
- snprintf(dst+l, size-l,
- "[%s]: No help", tmpbuf);
- }
-
- return 1;
+ if (strncmp(preparse.comp_tok_buf, tmpbuf,
+ preparse.comp_tok_len))
+ continue;
+
+ /* first one, save the buffer */
+ if (nb_completion == 0) {
+ completion_len = snprintf(completion_buf,
+ sizeof(completion_buf),
+ "%s", tmpbuf);
+ }
+ else {
+ n = nb_common_chars(completion_buf, tmpbuf);
+ if (n < completion_len)
+ completion_len = n;
}
+ nb_completion ++;
+
+ /* we cannot add any char, just display help */
+ if (completion_len == preparse.comp_tok_len)
+ break;
}
- next2:
- inst_num ++;
- inst = ctx[inst_num];
+ if (token->ops->complete_end != NULL)
+ token->ops->complete_end(token, &preparse.opaque);
+
+ if (completion_len == preparse.comp_tok_len)
+ break;
}
- return 0;
+
+ debug_printf("nb_completion=%d, completion_len=%d\n",
+ nb_completion, completion_len);
+
+ /* one choice, append chars and return */
+ if (nb_completion == 1) {
+ snprintf(dst, dstsize, "%s",
+ completion_buf + preparse.comp_tok_len);
+ return CMDLINE_COMPLETE_APPEND;
+ }
+
+ /* many choices, but starting with same chars: append chars
+ * and return */
+ if (nb_completion != 0 && completion_len > preparse.comp_tok_len) {
+ if (completion_len >= dstsize)
+ completion_len = dstsize - 1;
+ strncpy(dst, completion_buf + preparse.comp_tok_len,
+ completion_len);
+ dst[completion_len] = '\0';
+ return CMDLINE_COMPLETE_APPEND;
+ }
+
+ /* no match, nothing to do */
+ if (nb_match == 0 || nb_completion == 0)
+ return CMDLINE_COMPLETE_NONE;
+
+ return CMDLINE_COMPLETE_MANY;
}
git.droids-corp.org / libcmdline.git / blobdiff