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cligen_parse.y
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cligen_parse.y
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/*
CLI generator. Take idl as input and generate a tree for use in cli.
***** BEGIN LICENSE BLOCK *****
Copyright (C) 2001-2022 Olof Hagsand
This file is part of CLIgen.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Alternatively, the contents of this file may be used under the terms of
the GNU General Public License Version 2 or later (the "GPL"),
in which case the provisions of the GPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of the GPL, and not to allow others to
use your version of this file under the terms of Apache License version 2, indicate
your decision by deleting the provisions above and replace them with the
notice and other provisions required by the GPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the Apache License version 2 or the GPL.
***** END LICENSE BLOCK *****
Choice:
*/
%start file
%union {
int intval;
char *string;
void *stack;
}
%token MY_EOF
%token V_RANGE V_LENGTH V_CHOICE V_KEYWORD V_REGEXP V_FRACTION_DIGITS V_SHOW V_TREENAME V_TRANSLATE V_PREFERENCE
%token DOUBLEPARENT /* (( */
%token DQ /* " */
%token DQP /* ") */
%token PDQ /* (" */
%token SETS /* @{ SETS */
%token <string> NAME /* in variables: <NAME type:NAME> */
%token <string> NUMBER /* In variables */
%token <string> DECIMAL /* In variables */
%token <string> CHARS
%token <string> HELPSTR
%type <string> charseq
%type <string> choices
%type <string> numdec
%type <string> arg1
%type <string> typecast
%type <string> helpstring
%type <string> helpstring1
%type <intval> preline
%lex-param {void *_cy} /* Add this argument to parse() and lex() function */
%parse-param {void *_cy}
%{
/* Here starts user C-code */
/* typecast macro */
#define _CY ((cligen_yacc *)_cy)
#define _YYERROR(msg) { cligen_parseerror(_CY, (msg)); YYERROR; }
/* add _cy to error paramaters */
#define YY_(msgid) msgid
#include "cligen_config.h"
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include "cligen_buf.h"
#include "cligen_cv.h"
#include "cligen_cvec.h"
#include "cligen_parsetree.h"
#include "cligen_pt_head.h"
#include "cligen_callback.h"
#include "cligen_object.h"
#include "cligen_syntax.h"
#include "cligen_handle.h"
#include "cligen_parse.h"
static int debug = 0;
/* Enable for debugging, steals some cycles otherwise */
#if 0
#define _PARSE_DEBUG(s) fprintf(stderr, s "\n")
#else
#define _PARSE_DEBUG(s)
#endif
extern int cligen_parseget_lineno (void);
int
cligen_parse_debug(int d)
{
debug = d;
return 0;
}
/*! CLIGEN parse error routine
*
* Also called from yacc generated code *
* @param[in] cy CLIgen yacc parse struct
*/
void cligen_parseerror(void *_cy,
char *s)
{
cligen_yacc *cy = (cligen_yacc *)_cy;
fprintf(stderr, "%s:%d: Error: %s: at or before: '%s'\n",
cy->cy_name,
cy->cy_linenum ,
s,
cligen_parsetext);
return;
}
#define cligen_parseerror1(cy, s) cligen_parseerror(cy, s)
/*! Create a CLIgen variable (cv) and store it in the current variable object
*
* Note that only one such cv can be stored.
* @param[in] cy CLIgen yacc parse struct
*/
static cg_var *
create_cv(cligen_yacc *cy,
char *type,
char *str)
{
cg_var *cv = NULL;
if ((cv = cv_new(CGV_STRING)) == NULL){
fprintf(stderr, "malloc: %s\n", strerror(errno));
goto done;
}
if (type){
if (cv_type_set(cv, cv_str2type(type)) == CGV_ERR){
fprintf(stderr, "%s:%d: error: No such type: %s\n",
cy->cy_name, cy->cy_linenum, type);
cv_free(cv); cv = NULL;
goto done;
}
}
if (cv_parse(str, cv) < 0){ /* parse str into cgv */
cv_free(cv); cv = NULL;
goto done;
}
done:
return cv;
}
/*!
* @param[in] cy CLIgen yacc parse struct
*/
static int
cgy_flag(cligen_yacc *cy,
char *var)
{
struct cgy_stack *cs = cy->cy_stack;
cg_var *cv;
int retval = -1;
if (debug)
fprintf(stderr, "%s: %s 1\n", __FUNCTION__, var);
if (cs){ /* XXX: why cs? */
if (cy->cy_cvec == NULL){
if ((cy->cy_cvec = cvec_new(0)) == NULL){
fprintf(stderr, "%s: cvec_new:%s\n", __FUNCTION__, strerror(errno));
goto done;
}
}
if ((cv = cvec_add(cy->cy_cvec, CGV_INT32)) == NULL){
fprintf(stderr, "%s: realloc:%s\n", __FUNCTION__, strerror(errno));
goto done;
}
cv_name_set(cv, var);
cv_int32_set(cv, 1);
}
retval = 0;
done:
return retval;
}
/*! Set a new treename. In fact registers the previous tree and creates a new .
*
* Note that one could have used an assignment: treename = <name>; for this but
* I decided to create special syntax for this so that assignments can use any
* variable names.
* @param[in] cy CLIgen yacc parse struct
* @param[in] name Name of tree
*/
static int
cgy_treename(cligen_yacc *cy,
char *name)
{
cg_obj *co = NULL;
cg_obj *cot;
struct cgy_list *cl;
int retval = -1;
int i;
parse_tree *pt;
pt_head *ph;
cg_var *cv;
/* Get the first object */
for (cl=cy->cy_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
break;
}
/* Get the top object */
cot = co_top(co); /* co and cot can be same object */
pt = co_pt_get(cot);
/* If anything parsed */
if (pt_len_get(pt) > 0){
/* 2. Add the old parse-tree with old name*/
for (i=0; i<pt_len_get(pt); i++){
if ((co=pt_vec_i_get(pt, i)) != NULL)
co_up_set(co, NULL);
}
if ((ph = cligen_ph_add(cy->cy_handle, cy->cy_treename)) == NULL)
goto done;
if (cligen_ph_parsetree_set(ph, pt) < 0)
goto done;
/* 3. Create new parse-tree XXX */
if ((pt = pt_new()) == NULL)
goto done;
co_pt_clear(cot);
co_pt_set(cot, pt);
if ((cv = cvec_find(cy->cy_globals, "pipetree")) != NULL){
char *str;
if ((str = cv_string_get(cv)) != NULL && strlen(str))
if (cligen_ph_pipe_set(ph, str) < 0)
goto done;
}
}
/* 4. Set the new name */
if (cy->cy_treename)
free(cy->cy_treename);
if ((cy->cy_treename = strdup(name)) == NULL){
fprintf(stderr, "%s: strdup: %s\n", __FUNCTION__, strerror(errno));
goto done;
}
retval = 0;
done:
return retval;
}
/*! Variable assignment
*
* Only string type supported for now
* @param[in] cy CLIgen yacc parse struct
*/
static int
cgy_assignment(cligen_yacc *cy,
char *var,
char *val)
{
struct cgy_stack *cs = cy->cy_stack;
int retval = -1;
cg_var *cv;
char *treename_keyword;
cligen_handle h = cy->cy_handle;
if (cs == NULL){
errno = EINVAL;
goto done;
}
if (debug)
fprintf(stderr, "%s: %s=%s\n", __FUNCTION__, var, val);
if (cs->cs_next != NULL){ /* local */
if (cy->cy_cvec == NULL)
if ((cy->cy_cvec = cvec_new(0)) == NULL){
fprintf(stderr, "%s: cvec_new:%s\n", __FUNCTION__, strerror(errno));
goto done;
}
if ((cv = cvec_add(cy->cy_cvec, CGV_STRING)) == NULL){
fprintf(stderr, "%s: realloc:%s\n", __FUNCTION__, strerror(errno));
goto done;
}
cv_name_set(cv, var);
if (cv_parse(val, cv) < 0)
goto done;
}
else{ /* global */
treename_keyword = cligen_treename_keyword(h); /* typically: "treename" */
if (strcmp(var, treename_keyword) == 0){
if (cgy_treename(cy, val) < 0)
goto done;
}
else {
if ((cv = cvec_find(cy->cy_globals, var)) == NULL){
if ((cv = cvec_add(cy->cy_globals, CGV_STRING)) == NULL){
fprintf(stderr, "%s: realloc:%s\n", __FUNCTION__, strerror(errno));
goto done;
}
cv_name_set(cv, var);
}
if (cv_parse(val, cv) < 0) /* May be wrong type */
goto done;
}
}
retval = 0;
done:
return retval;
}
/*!
* @param[in] cy CLIgen yacc parse struct
*/
int
cgy_callback(cligen_yacc *cy,
char *cb_str)
{
struct cgy_stack *cs = cy->cy_stack;
cg_callback *cc, **ccp;
if (debug)
fprintf(stderr, "%s: %s\n", __FUNCTION__, cb_str);
if (cs == NULL)
return 0;
ccp = &cy->cy_callbacks;
while (*ccp != NULL)
ccp = &((*ccp)->cc_next);
if ((cc = malloc(sizeof(*cc))) == NULL){
fprintf(stderr, "%s: malloc: %s\n", __FUNCTION__, strerror(errno));
cligen_parseerror1(cy, "Allocating cligen callback");
return -1;
}
memset(cc, 0, sizeof(*cc));
cc->cc_fn_str = cb_str;
if (IS_PIPE_TREE(cy->cy_treename)){ /* Only for cligen, clixon has other mechanisms */
cc->cc_flags |= CC_FLAGS_PIPE_FUNCTION;
}
*ccp = cc;
return 0;
}
/*! Create a callback argument and store it in the current callback
*
* @param[in] cy CLIgen yacc parse struct
*/
static int
cgy_callback_arg(cligen_yacc *cy,
char *type,
char *arg)
{
int retval = -1;
cg_callback *cc;
cg_callback *cclast;
cg_var *cv = NULL;
cclast = NULL;
for (cc=cy->cy_callbacks; cc; cc = co_callback_next(cc))
cclast = cc;
if (cclast){
if ((cv = create_cv(cy, type, arg)) == NULL)
goto done;
if (cclast->cc_cvec)
cvec_append_var(cclast->cc_cvec, cv);
else
cclast->cc_cvec = cvec_from_var(cv);
}
retval = 0;
done:
if (cv)
cv_free(cv);
return retval;
}
/*!
* @param[in] cy CLIgen yacc parse struct
*/
static int
expand_arg(cligen_yacc *cy,
char *arg)
{
int retval = -1;
cg_var *cv = NULL;
if ((cv = create_cv(cy, "string", arg)) == NULL)
goto done;
if (cy->cy_var->co_expand_fn_vec)
cvec_append_var(cy->cy_var->co_expand_fn_vec, cv);
else
cy->cy_var->co_expand_fn_vec = cvec_from_var(cv);
retval = 0;
done:
if (cv)
cv_free(cv);
return retval;
}
/*!
* @param[in] cy CLIgen yacc parse struct
*/
static int
expand_fn(cligen_yacc *cy,
char *fn)
{
cy->cy_var->co_expand_fn_str = fn;
return 0;
}
static int
cg_translate(cligen_yacc *cy,
char *fn)
{
cy->cy_var->co_translate_fn_str = fn;
return 0;
}
static int
cg_preference(cligen_yacc *cy,
char *pref)
{
cg_obj *yv;
char *reason = NULL;
if ((yv = cy->cy_var) == NULL){
fprintf(stderr, "No var obj");
return -1;
}
if (parse_uint16(pref, &yv->co_preference, &reason) != 1){
cligen_parseerror1(cy, reason);
return -1;
}
return 0;
}
static int
cgy_list_push(cg_obj *co,
struct cgy_list **cl0)
{
struct cgy_list *cl;
if (debug)
fprintf(stderr, "%s\n", __FUNCTION__);
if ((cl = malloc(sizeof(*cl))) == NULL) {
fprintf(stderr, "%s: malloc: %s\n", __FUNCTION__, strerror(errno));
return -1;
}
cl->cl_next = *cl0;
cl->cl_obj = co;
*cl0 = cl;
return 0;
}
/*! Delete whole list
*
* @param[in] cy CLIgen yacc parse struct
*/
static int
cgy_list_delete(struct cgy_list **cl0)
{
struct cgy_list *cl;
while ((cl = *cl0) != NULL){
*cl0 = cl->cl_next;
free(cl);
}
return 0;
}
/*! Create new tmp variable cligen object
*
* It must be filled in by later functions.
* The reason is, the variable must be completely parsed by successive syntax
* (eg <type:> stuff) and we cant insert it into the object tree until that is done.
* And completed by the '_post' function
* @param[in] cy CLIgen yacc parse struct
* @retval tmp variable object
* @see cgy_var_post
*/
static cg_obj *
cgy_var_create(cligen_yacc *cy)
{
cg_obj *co;
/* Create unassigned variable object */
if ((co = cov_new(CGV_ERR, NULL)) == NULL){
fprintf(stderr, "%s: malloc: %s\n", __FUNCTION__, strerror(errno));
cligen_parseerror1(cy, "Allocating cligen object");
return NULL;
}
if (cy->cy_optional){
co_flags_set(co, CO_FLAGS_OPTION);
}
if (debug)
fprintf(stderr, "%s: pre\n", __FUNCTION__);
return co;
}
/*! Set name and type on a (previously created) variable
*
* @param[in] cy CLIgen yacc parse struct
* @see cgy_var_create
*/
static int
cgy_var_name_type(cligen_yacc *cy,
char *name,
char *type)
{
cy->cy_var->co_command = name;
if ((cy->cy_var->co_vtype = cv_str2type(type)) == CGV_ERR){
cligen_parseerror1(cy, "Invalid type");
fprintf(stderr, "%s: Invalid type: %s\n", __FUNCTION__, type);
return -1;
}
return 0;
}
/*! Complete variable cligen object after parsing is complete,
*
* And insert it into object hierarchies.
* That is, insert a variable in each hieracrhy.
* @param[in] cy CLIgen yacc parse struct
* @retval 0 on OK
* @retval -1 on error
*/
static int
cgy_var_post(cligen_yacc *cy)
{
struct cgy_list *cl;
cg_obj *coc = NULL; /* variable copy object */
cg_obj *coparent; /* parent */
cg_obj *co; /* new obj/sister */
cg_obj *coy = cy->cy_var;
#if 0
if (coy->co_vtype == CGV_ERR) /* unassigned */
coy->co_vtype = cv_str2type(coy->co_command);
#endif
if (debug)
fprintf(stderr, "%s: cmd:%s vtype:%d\n", __FUNCTION__,
coy->co_command,
coy->co_vtype );
if (coy->co_vtype == CGV_ERR){
cligen_parseerror1(cy, "Wrong or unassigned variable type");
return -1;
}
#if 0 /* XXX dont really know what i am doing but variables dont behave nice in choice */
if (cy->cy_opt){ /* get coparent from stack */
if (cy->cy_stack == NULL){
fprintf(stderr, "Option allowed only within () or []\n");
return -1;
}
cl = cy->cy_stack->cs_list;
}
else
#endif
cl = cy->cy_list;
for (; cl; cl = cl->cl_next){
coparent = cl->cl_obj;
if (cl->cl_next){
if (co_copy(coy, coparent, 0x0, &coc) < 0) /* duplicate coy to coc */
return -1;
}
else
coc = coy; /* Dont copy if last in list */
co_up_set(coc, coparent);
if ((co = co_insert(co_pt_get(coparent), coc)) == NULL) /* coc may be deleted */
return -1;
cl->cl_obj = co;
}
return 0;
}
/*! Create a new command object.
*
* Actually, create a new for every tree in the list
* and replace the old with the new object.
* @param[in] cy CLIgen yacc parse struct
* @param[in] cmd the command string
* @retval 0 OK
* @retval -1 Error
*/
static int
cgy_cmd(cligen_yacc *cy,
char *cmd)
{
struct cgy_list *cl;
cg_obj *cop; /* parent */
cg_obj *conew; /* new obj */
cg_obj *co; /* new/sister */
for (cl=cy->cy_list; cl; cl = cl->cl_next){
cop = cl->cl_obj;
if (debug)
fprintf(stderr, "%s: %s parent:%s\n",
__FUNCTION__, cmd, cop->co_command);
if ((conew = co_new(cmd, cop)) == NULL) {
cligen_parseerror1(cy, "Allocating cligen object");
return -1;
}
if ((co = co_insert(co_pt_get(cop), conew)) == NULL) /* co_new may be deleted */
return -1;
if (cy->cy_optional){
co_flags_set(co, CO_FLAGS_OPTION);
}
cl->cl_obj = co; /* Replace parent in cgy_list */
}
return 0;
}
/*! Create a REFERENCE node that references another tree.
*
* This is evaluated in runtime by pt_expand().
* @param[in] cy CLIgen yacc parse struct
* @param[in] name Name of tree reference
* @param[in] pipetree If 1 references a "pipe" tree, ie prepend a "|" to name
* @see also db2tree() in clicon/apps/cli_main.c on how to create such a tree
* @see pt_expand_treeref()/pt_callback_reference() how it is expanded
*/
static int
cgy_reference(cligen_yacc *cy,
char *name,
int pipetree)
{
int retval = -1;
struct cgy_list *cl;
cg_obj *cop; /* parent */
cg_obj *cot; /* tree */
cbuf *cb = NULL;
if ((cb = cbuf_new()) == NULL)
goto done;
if (pipetree)
cprintf(cb, "|");
cprintf(cb, "%s", name);
for (cl=cy->cy_list; cl; cl = cl->cl_next){
/* Add a treeref 'stub' which is expanded in pt_expand to a sub-tree */
cop = cl->cl_obj;
if ((cot = co_new(cbuf_get(cb), cop)) == NULL) {
cligen_parseerror1(cy, "Allocating cligen object");
goto done;
}
cot->co_type = CO_REFERENCE;
if ((cot = co_insert(co_pt_get(cop), cot)) == NULL) /* cot may be deleted */
goto done;
/* Replace parent in cgy_list: not allowed after ref?
but only way to add callbacks to it.
*/
if (cy->cy_optional){
co_flags_set(cot, CO_FLAGS_OPTION);
}
cl->cl_obj = cot;
}
retval = 0;
done:
if (cb)
cbuf_free(cb);
return retval;
}
/*! Add one line of helpstr
*
* @param[in] cy CLIgen yacc parse struct
* @param[in] merge OK to merge
* @param[in] helpstr Malloced help string, stripped of spaces, consumed here
*/
static int
cgy_helpstring(cligen_yacc *cy,
int merge,
char *helpstr)
{
int retval = -1;
struct cgy_list *cl;
cg_obj *co;
if (helpstr == NULL){
errno = EINVAL;
goto done;
}
for (cl = cy->cy_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (co->co_helpstring){
if (merge){
if ((co->co_helpstring = realloc(co->co_helpstring,
strlen(co->co_helpstring) + strlen(helpstr) + 2)) == NULL){
cligen_parseerror1(cy, "Allocating helpstr");
goto done;
}
strcat(co->co_helpstring, "\n");
strcat(co->co_helpstring, helpstr);
}
}
else
if ((co->co_helpstring = strdup(helpstr)) == NULL){
cligen_parseerror1(cy, "Allocating helpstr");
goto done;
}
}
free(helpstr);
retval = 0;
done:
return retval;
}
/*! Append a new choice option to a choice variable string
*
* @param[in] cy CLIgen yacc parse struct
* @param[in] str Accumulated choice string on the form: "a|..|z"
* @param[in] app Choice option to append
* @retval s New string created by appending: "<str>|<app>"
* This is just string manipulation, the complete string is linked into CLIgen structs by upper rule
* Note that this is variable choice. There is also command choice, eg [a|b] which is different.
*/
static char *
cgy_var_choice_append(cligen_yacc *cy,
char *str,
char *app)
{
int len;
char *s;
len = strlen(str)+strlen(app) + 2;
if ((s = realloc(str, len)) == NULL) {
fprintf(stderr, "%s: realloc: %s\n", __FUNCTION__, strerror(errno));
return NULL;
}
strncat(s, "|", len-1);
strncat(s, app, len-1);
return s;
}
/*! Post-processing of commands, eg at ';':
*
* a cmd;<--
* But only if parsing succesful.
* 1. Add callback and args to every list
* 2. Add empty child unless already empty child
* @param[in] cy CLIgen yacc parse struct
* @note co_callback_copy takes cycles, ca 50%
*/
int
cgy_terminal(cligen_yacc *cy)
{
struct cgy_list *cl;
cg_obj *co;
int i;
cg_callback **ccp;
int retval = -1;
parse_tree *ptc;
cg_obj *coi;
for (cl = cy->cy_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cy->cy_callbacks){ /* callbacks */
ccp = &co->co_callbacks;
while (*ccp != NULL)
ccp = &((*ccp)->cc_next);
#if 1 /* Optimization: dont copy the last element */
if (cl->cl_next == NULL)
*ccp = cy->cy_callbacks;
else
#endif
if (co_callback_copy(cy->cy_callbacks, ccp) < 0)
goto done;
}
/* variables: special case "hide" */
if (cy->cy_cvec){
if (cvec_find(cy->cy_cvec, "hide") != NULL)
co_flags_set(co, CO_FLAGS_HIDE);
/* generic variables */
if (co->co_cvec)
cvec_free(co->co_cvec);
if ((co->co_cvec = cvec_dup(cy->cy_cvec)) == NULL){ /* this leaks */
fprintf(stderr, "%s: cvec_dup: %s\n", __FUNCTION__, strerror(errno));
goto done;
}
}
/* misc */
if ((ptc = co_pt_get(co)) != NULL){
for (i=0; i<pt_len_get(ptc); i++){
if (pt_vec_i_get(ptc, i) == NULL)
break;
}
if (i == pt_len_get(ptc)){ /* Insert empty child if ';' */
if ((coi = co_new(NULL, co)) == NULL) {
cligen_parseerror1(cy, "Allocating cligen object");
return -1;
}
coi->co_type = CO_EMPTY;
co_insert(co_pt_get(co), coi);
}
}
else{ /* Should never reach here? */
co_insert(co_pt_get(co), NULL);
}
}
/* cleanup */
#if 1 /* Optimization: dont copy first */
if ((cl = cy->cy_list) != NULL)
cy->cy_callbacks = NULL;
else
#endif
if (cy->cy_callbacks)
co_callbacks_free(&cy->cy_callbacks);
if (cy->cy_cvec){
cvec_free(cy->cy_cvec);
cy->cy_cvec = NULL;
}
retval = 0;
done:
return retval;
}
/*! Take the whole cgy_list and push it to the stack
*
* @param[in] cy CLIgen yacc parse struct
* @see ctx_pop
*/
static int
ctx_push(cligen_yacc *cy,
int sets)
{
struct cgy_list *cl;
struct cgy_stack *cs;
cg_obj *co;
if (debug)
fprintf(stderr, "%s\n", __FUNCTION__);
/* Create new stack element */
if ((cs = malloc(sizeof(*cs))) == NULL) {
fprintf(stderr, "%s: malloc: %s\n", __FUNCTION__, strerror(errno));
return -1;
}
memset(cs, 0, sizeof(*cs));
cs->cs_next = cy->cy_stack;
cy->cy_stack = cs; /* Push the new stack element */
for (cl = cy->cy_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cvec_find(cy->cy_cvec, "hide") != NULL)
co_flags_set(co, CO_FLAGS_HIDE);
if (sets)
co_sets_set(co, 1);
if (cgy_list_push(co, &cs->cs_list) < 0)
return -1;
}
return 0;
}
/*! Peek context from stack and replace the object list with it
*
* Typically done in a command choice, eg "(c1|c2)" at c2.
* Dont pop context
* @param[in] cy CLIgen yacc parse struct
* @see ctx_peek_swap2
*/
static int
ctx_peek_swap(cligen_yacc *cy)
{
struct cgy_stack *cs;
struct cgy_list *cl;
cg_obj *co;
if (debug)
fprintf(stderr, "%s\n", __FUNCTION__);
if ((cs = cy->cy_stack) == NULL){
#if 1
cligen_parseerror1(cy, "No surrounding () or []");
return -1; /* e.g a|b instead of (a|b) */
#else
cgy_list_delete(&cy->cy_list);
return 0;
#endif
}
for (cl = cy->cy_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cgy_list_push(co, &cs->cs_saved) < 0)
return -1;
}
cgy_list_delete(&cy->cy_list);
for (cl = cs->cs_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cgy_list_push(co, &cy->cy_list) < 0)
return -1;
}
return 0;
}
/*! Peek context from stack and replace the object list with it
*
* Typically done in a command choice, eg "(c1|c2)" at c2.
* Dont pop context
* @param[in] cy CLIgen yacc parse struct
* @see ctx_peek_swap
*/
static int
ctx_peek_swap2(cligen_yacc *cy)
{
struct cgy_stack *cs;
struct cgy_list *cl;
cg_obj *co;
if (debug)
fprintf(stderr, "%s\n", __FUNCTION__);
if ((cs = cy->cy_stack) == NULL){
#if 1
cligen_parseerror1(cy, "No surrounding () or []");
return -1; /* e.g a|b instead of (a|b) */
#else
cgy_list_delete(&cy->cy_list);
return 0;
#endif
}
cgy_list_delete(&cy->cy_list);
for (cl = cs->cs_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cgy_list_push(co, &cy->cy_list) < 0)
return -1;
}
return 0;
}
static int
delete_stack_element(struct cgy_stack *cs)
{
cgy_list_delete(&cs->cs_list);
cgy_list_delete(&cs->cs_saved);
free(cs);
return 0;
}
/*! Pop context from stack and add it to object list
*
* Done after an option, eg "cmd [opt]"
* "cmd <push> [opt] <pop>". At pop, all objects saved at push
* are added to the object list.
* @param[in] cy CLIgen yacc parse struct
*/
static int
ctx_pop_add(cligen_yacc *cy)
{
struct cgy_stack *cs;
struct cgy_list *cl;
cg_obj *co;
if (debug)
fprintf(stderr, "%s\n", __FUNCTION__);
if ((cs = cy->cy_stack) == NULL){
fprintf(stderr, "%s: cgy_stack empty\n", __FUNCTION__);
return -1; /* shouldnt happen */
}
cy->cy_stack = cs->cs_next;
/* We could have saved some heap work by moving the cs_list,... */
for (cl = cs->cs_list; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cgy_list_push(co, &cy->cy_list) < 0)
return -1;
}
for (cl = cs->cs_saved; cl; cl = cl->cl_next){
co = cl->cl_obj;
if (cgy_list_push(co, &cy->cy_list) < 0)
return -1;
}
delete_stack_element(cs);
return 0;
}
/*! Pop context from stack and discard it.
*
* Typically done after a grouping, eg "cmd (opt1|opt2)"
* @param[in] cy CLIgen yacc parse struct
* @see ctx_push
*/
static int
ctx_pop(cligen_yacc *cy)
{
struct cgy_stack *cs;
struct cgy_list *cl;
cg_obj *co;