conditional.h File Reference

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Data Structures
struct	IfStackElem
struct	ConditionalStackData

Typedefs
typedef enum ifState	ifState
typedef struct IfStackElem	IfStackElem
typedef struct ConditionalStackData	ConditionalStackData
typedef struct ConditionalStackData *	ConditionalStack

Enumerations
enum	ifState {   IFSTATE_NONE = 0 , IFSTATE_TRUE , IFSTATE_FALSE , IFSTATE_IGNORED ,   IFSTATE_ELSE_TRUE , IFSTATE_ELSE_FALSE }

Functions
ConditionalStack	conditional_stack_create (void)
void	conditional_stack_reset (ConditionalStack cstack)
void	conditional_stack_destroy (ConditionalStack cstack)
int	conditional_stack_depth (ConditionalStack cstack)
void	conditional_stack_push (ConditionalStack cstack, ifState new_state)
bool	conditional_stack_pop (ConditionalStack cstack)
ifState	conditional_stack_peek (ConditionalStack cstack)
bool	conditional_stack_poke (ConditionalStack cstack, ifState new_state)
bool	conditional_stack_empty (ConditionalStack cstack)
bool	conditional_active (ConditionalStack cstack)
void	conditional_stack_set_query_len (ConditionalStack cstack, int len)
int	conditional_stack_get_query_len (ConditionalStack cstack)
void	conditional_stack_set_paren_depth (ConditionalStack cstack, int depth)
int	conditional_stack_get_paren_depth (ConditionalStack cstack)

Typedef Documentation

ConditionalStack

typedef struct ConditionalStackData* ConditionalStack

Definition at line 71 of file conditional.h.

ConditionalStackData

typedef struct ConditionalStackData ConditionalStackData

IfStackElem

typedef struct IfStackElem IfStackElem

ifState

typedef enum ifState ifState

Enumeration Type Documentation

ifState

enum ifState

Enumerator
IFSTATE_NONE
IFSTATE_TRUE
IFSTATE_FALSE
IFSTATE_IGNORED
IFSTATE_ELSE_TRUE
IFSTATE_ELSE_FALSE

Definition at line 29 of file conditional.h.

{
    IFSTATE_NONE = 0,           /* not currently in an \if block */
    IFSTATE_TRUE,               /* currently in an \if or \elif that is true
                                 * and all parent branches (if any) are true */
    IFSTATE_FALSE,              /* currently in an \if or \elif that is false
                                 * but no true branch has yet been seen, and
                                 * all parent branches (if any) are true */
    IFSTATE_IGNORED,            /* currently in an \elif that follows a true
                                 * branch, or the whole \if is a child of a
                                 * false parent branch */
    IFSTATE_ELSE_TRUE,          /* currently in an \else that is true and all
                                 * parent branches (if any) are true */
    IFSTATE_ELSE_FALSE,         /* currently in an \else that is false or
                                 * ignored */
} ifState;

Function Documentation

conditional_active()

bool conditional_active

(

ConditionalStack

cstack

)

Definition at line 140 of file conditional.c.

{
    ifState     s = conditional_stack_peek(cstack);
 
    return s == IFSTATE_NONE || s == IFSTATE_TRUE || s == IFSTATE_ELSE_TRUE;
}

References conditional_stack_peek(), IFSTATE_ELSE_TRUE, IFSTATE_NONE, and IFSTATE_TRUE.

Referenced by advanceConnectionState(), exec_command(), exec_command_if(), get_prompt(), HandleSlashCmds(), MainLoop(), and psql_get_variable().

conditional_stack_create()

ConditionalStack conditional_stack_create

(

void

)

Definition at line 18 of file conditional.c.

{
    ConditionalStack cstack = pg_malloc(sizeof(ConditionalStackData));
 
    cstack->head = NULL;
    return cstack;
}

References ConditionalStackData::head, and pg_malloc().

Referenced by CheckConditional(), main(), and MainLoop().

conditional_stack_depth()

int conditional_stack_depth

(

ConditionalStack

cstack

)

Definition at line 84 of file conditional.c.

{
    if (cstack == NULL)
        return -1;
    else
    {
        IfStackElem *p = cstack->head;
        int         depth = 0;
 
        while (p != NULL)
        {
            depth++;
            p = p->next;
        }
        return depth;
    }
}

References ConditionalStackData::head, and IfStackElem::next.

conditional_stack_destroy()

void conditional_stack_destroy

(

ConditionalStack

cstack

)

Definition at line 43 of file conditional.c.

{
    conditional_stack_reset(cstack);
    free(cstack);
}

References conditional_stack_reset(), and free.

Referenced by CheckConditional(), main(), and MainLoop().

conditional_stack_empty()

bool conditional_stack_empty

(

ConditionalStack

cstack

)

Definition at line 130 of file conditional.c.

{
    return cstack->head == NULL;
}

References ConditionalStackData::head.

Referenced by advanceConnectionState(), CheckConditional(), conditional_stack_get_paren_depth(), conditional_stack_get_query_len(), conditional_stack_peek(), conditional_stack_poke(), conditional_stack_set_paren_depth(), conditional_stack_set_query_len(), executeMetaCommand(), and MainLoop().

conditional_stack_get_paren_depth()

int conditional_stack_get_paren_depth

(

ConditionalStack

cstack

)

Definition at line 184 of file conditional.c.

{
    if (conditional_stack_empty(cstack))
        return -1;
    return cstack->head->paren_depth;
}

References conditional_stack_empty(), ConditionalStackData::head, and IfStackElem::paren_depth.

Referenced by discard_query_text().

conditional_stack_get_query_len()

int conditional_stack_get_query_len

(

ConditionalStack

cstack

)

Definition at line 162 of file conditional.c.

{
    if (conditional_stack_empty(cstack))
        return -1;
    return cstack->head->query_len;
}

References conditional_stack_empty(), ConditionalStackData::head, and IfStackElem::query_len.

Referenced by discard_query_text().

conditional_stack_peek()

ifState conditional_stack_peek

(

ConditionalStack

cstack

)

Definition at line 106 of file conditional.c.

{
    if (conditional_stack_empty(cstack))
        return IFSTATE_NONE;
    return cstack->head->if_state;
}

References conditional_stack_empty(), ConditionalStackData::head, IfStackElem::if_state, and IFSTATE_NONE.

Referenced by advanceConnectionState(), CheckConditional(), conditional_active(), exec_command_elif(), exec_command_else(), exec_command_endif(), and executeMetaCommand().

conditional_stack_poke()

bool conditional_stack_poke	(	ConditionalStack	cstack,
		ifState	new_state
	)

Definition at line 118 of file conditional.c.

{
    if (conditional_stack_empty(cstack))
        return false;
    cstack->head->if_state = new_state;
    return true;
}

References conditional_stack_empty(), ConditionalStackData::head, and IfStackElem::if_state.

Referenced by advanceConnectionState(), CheckConditional(), exec_command_elif(), exec_command_else(), exec_command_if(), and executeMetaCommand().

conditional_stack_pop()

bool conditional_stack_pop

(

ConditionalStack

cstack

)

Definition at line 69 of file conditional.c.

{
    IfStackElem *p = cstack->head;
 
    if (!p)
        return false;
    cstack->head = cstack->head->next;
    free(p);
    return true;
}

References free, ConditionalStackData::head, and IfStackElem::next.

Referenced by advanceConnectionState(), CheckConditional(), conditional_stack_reset(), exec_command_endif(), executeMetaCommand(), HandleSlashCmds(), and MainLoop().

conditional_stack_push()

void conditional_stack_push	(	ConditionalStack	cstack,
		ifState	new_state
	)

Definition at line 53 of file conditional.c.

{
    IfStackElem *p = (IfStackElem *) pg_malloc(sizeof(IfStackElem));
 
    p->if_state = new_state;
    p->query_len = -1;
    p->paren_depth = -1;
    p->next = cstack->head;
    cstack->head = p;
}

References ConditionalStackData::head, IfStackElem::if_state, IfStackElem::next, IfStackElem::paren_depth, pg_malloc(), and IfStackElem::query_len.

Referenced by advanceConnectionState(), CheckConditional(), exec_command_if(), executeMetaCommand(), and HandleSlashCmds().

conditional_stack_reset()

void conditional_stack_reset

(

ConditionalStack

cstack

)

Definition at line 30 of file conditional.c.

{
    if (!cstack)
        return;                 /* nothing to do here */
 
    while (conditional_stack_pop(cstack))
        continue;
}

References conditional_stack_pop().

Referenced by advanceConnectionState(), and conditional_stack_destroy().

conditional_stack_set_paren_depth()

void conditional_stack_set_paren_depth	(	ConditionalStack	cstack,
		int	depth
	)

Definition at line 173 of file conditional.c.

{
    Assert(!conditional_stack_empty(cstack));
    cstack->head->paren_depth = depth;
}

References Assert, conditional_stack_empty(), ConditionalStackData::head, and IfStackElem::paren_depth.

Referenced by save_query_text_state().

conditional_stack_set_query_len()

void conditional_stack_set_query_len	(	ConditionalStack	cstack,
		int	len
	)

Definition at line 151 of file conditional.c.

{
    Assert(!conditional_stack_empty(cstack));
    cstack->head->query_len = len;
}

References Assert, conditional_stack_empty(), ConditionalStackData::head, len, and IfStackElem::query_len.

Referenced by save_query_text_state().