preproc.c File Reference

#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "wpp_private.h"

Include dependency graph for preproc.c:

Go to the source code of this file.

Classes
struct	pp_def_state

Macros
#define	HASHKEY   2039
#define	MAXIFSTACK   64

Typedefs
typedef struct pp_def_state	pp_def_state_t

Functions
void *	pp_xmalloc (size_t size)
void *	pp_xrealloc (void *p, size_t size)
char *	pp_xstrdup (const char *str)
static int	pphash (const char *str)
pp_entry_t *	pplookup (const char *ident)
static void	free_pp_entry (pp_entry_t *ppp, int idx)
int	pp_push_define_state (void)
void	pp_pop_define_state (void)
void	pp_del_define (const char *name)
pp_entry_t *	pp_add_define (const char *def, const char *text)
pp_entry_t *	pp_add_macro (char *id, marg_t *args[], int nargs, mtext_t *exp)
void *	pp_open_include (const char *name, int type, const char *parent_name, char **newpath)
void	pp_push_if (pp_if_state_t s)
pp_if_state_t	pp_pop_if (void)
pp_if_state_t	pp_if_state (void)
void	pp_next_if_state (int i)
int	pp_get_if_depth (void)
void WINAPIV	pp_internal_error (const char *file, int line, const char *s,...)

Variables
struct pp_status	pp_status
static pp_def_state_t *	pp_def_state
static pp_if_state_t	if_stack [MAXIFSTACK]
static int	if_stack_idx = 0

Macro Definition Documentation

HASHKEY

#define HASHKEY   2039

Definition at line 31 of file preproc.c.

MAXIFSTACK

#define MAXIFSTACK   64

Definition at line 41 of file preproc.c.

Typedef Documentation

pp_def_state_t

typedef struct pp_def_state pp_def_state_t

Function Documentation

free_pp_entry()

static void free_pp_entry ( pp_entry_t *  ppp, int  idx  )

static

Definition at line 111 of file preproc.c.

{
    if(ppp->iep)
    {
        if(ppp->iep == pp_includelogiclist)
        {
            pp_includelogiclist = ppp->iep->next;
            if(pp_includelogiclist)
                pp_includelogiclist->prev = NULL;
        }
        else
        {
            ppp->iep->prev->next = ppp->iep->next;
            if(ppp->iep->next)
                ppp->iep->next->prev = ppp->iep->prev;
        }
        free(ppp->iep->filename);
        free(ppp->iep);
    }
 
    if(pp_def_state->defines[idx] == ppp)
    {
        pp_def_state->defines[idx] = ppp->next;
        if(pp_def_state->defines[idx])
            pp_def_state->defines[idx]->prev = NULL;
    }
    else
    {
        ppp->prev->next = ppp->next;
        if(ppp->next)
            ppp->next->prev = ppp->prev;
    }
 
    free(ppp);
}

Referenced by pp_del_define().

pp_add_define()

pp_entry_t * pp_add_define	(	const char *	def,
		const char *	text
	)

Definition at line 194 of file preproc.c.

{
    int len;
    char *cptr;
    int idx;
    pp_entry_t *ppp;
 
    if(!def)
        return NULL;
    idx = pphash(def);
    if((ppp = pplookup(def)) != NULL)
    {
        if(pp_status.pedantic)
            ppy_warning("Redefinition of %s\n\tPrevious definition: %s:%d", def, ppp->filename, ppp->linenumber);
        pp_del_define(def);
    }
    ppp = pp_xmalloc(sizeof(pp_entry_t));
    if(!ppp)
        return NULL;
    memset( ppp, 0, sizeof(*ppp) );
    ppp->ident = pp_xstrdup(def);
    if(!ppp->ident)
        goto error;
    ppp->type = def_define;
    ppp->subst.text = text ? pp_xstrdup(text) : NULL;
    if(text && !ppp->subst.text)
        goto error;
    ppp->filename = pp_xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
    if(!ppp->filename)
        goto error;
    ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
    ppp->next = pp_def_state->defines[idx];
    pp_def_state->defines[idx] = ppp;
    if(ppp->next)
        ppp->next->prev = ppp;
    if(ppp->subst.text)
    {
        /* Strip trailing white space from subst text */
        len = strlen(ppp->subst.text);
        while(len && strchr(" \t\r\n", ppp->subst.text[len-1]))
        {
            ppp->subst.text[--len] = '\0';
        }
        /* Strip leading white space from subst text */
        for(cptr = ppp->subst.text; *cptr && strchr(" \t\r", *cptr); cptr++)
        ;
        if(ppp->subst.text != cptr)
            memmove(ppp->subst.text, cptr, strlen(cptr)+1);
    }
    return ppp;
 
error:
    free(ppp->ident);
    free(ppp->subst.text);
    free(ppp);
    return NULL;
}

Referenced by add_cmdline_defines(), and add_special_defines().

pp_add_macro()

pp_entry_t * pp_add_macro	(	char *	id,
		marg_t *	args[],
		int	nargs,
		mtext_t *	exp
	)

Definition at line 252 of file preproc.c.

{
    int idx;
    pp_entry_t *ppp;
 
    if(!id)
        return NULL;
    idx = pphash(id);
    if((ppp = pplookup(id)) != NULL)
    {
        if(pp_status.pedantic)
            ppy_warning("Redefinition of %s\n\tPrevious definition: %s:%d", id, ppp->filename, ppp->linenumber);
        pp_del_define(id);
    }
    ppp = pp_xmalloc(sizeof(pp_entry_t));
    if(!ppp)
        return NULL;
    memset( ppp, 0, sizeof(*ppp) );
    ppp->ident  = id;
    ppp->type   = def_macro;
    ppp->margs  = args;
    ppp->nargs  = nargs;
    ppp->subst.mtext= exp;
    ppp->filename = pp_xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
    if(!ppp->filename)
    {
        free(ppp);
        return NULL;
    }
    ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
    ppp->next   = pp_def_state->defines[idx];
    pp_def_state->defines[idx] = ppp;
    if(ppp->next)
        ppp->next->prev = ppp;
    return ppp;
}

pp_del_define()

void pp_del_define

(

const char *

name

)

Definition at line 176 of file preproc.c.

{
    pp_entry_t *ppp;
    int idx = pphash(name);
 
    if((ppp = pplookup(name)) == NULL)
    {
        if(pp_status.pedantic)
            ppy_warning("%s was not defined", name);
        return;
    }
 
    free( ppp->ident );
    free( ppp->subst.text );
    free( ppp->filename );
    free_pp_entry( ppp, idx );
}

Referenced by del_cmdline_defines(), del_special_defines(), pp_add_define(), pp_add_macro(), and pp_pop_define_state().

pp_get_if_depth()

int pp_get_if_depth

(

void

)

Definition at line 433 of file preproc.c.

{
    return if_stack_idx;
}

Referenced by wpp_parse().

pp_if_state()

pp_if_state_t pp_if_state

(

void

)

Definition at line 405 of file preproc.c.

{
    if(!if_stack_idx)
        return if_true;
    else
        return if_stack[if_stack_idx-1];
}

Referenced by pp_next_if_state(), pp_pop_if(), and pp_push_if().

pp_internal_error()

void WINAPIV pp_internal_error	(	const char *	file,
		int	line,
		const char *	s,
			...
	)

Definition at line 438 of file preproc.c.

{
    __ms_va_list ap;
    __ms_va_start(ap, s);
    fprintf(stderr, "Internal error (please report) %s %d: ", file, line);
    vfprintf(stderr, s, ap);
    fprintf(stderr, "\n");
    __ms_va_end(ap);
    exit(3);
}

Referenced by pp_next_if_state(), pp_pop_if(), and pp_push_if().

pp_next_if_state()

void pp_next_if_state

(

int

i

)

Definition at line 414 of file preproc.c.

{
    switch(pp_if_state())
    {
    case if_true:
    case if_elsetrue:
        pp_push_if(i ? if_true : if_false);
        break;
    case if_false:
    case if_elsefalse:
    case if_elif:
    case if_ignore:
        pp_push_if(if_ignore);
        break;
    default:
        pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d) in #{if,ifdef,ifndef} directive", (int)pp_if_state());
    }
}

pp_open_include()

void * pp_open_include	(	const char *	name,
		int	type,
		const char *	parent_name,
		char **	newpath
	)

Definition at line 290 of file preproc.c.

{
    char *path;
    void *fp;
 
    if (!(path = wpp_lookup(name, type, parent_name))) return NULL;
    fp = wpp_open(path, type);
 
    if (fp)
    {
        if (newpath) *newpath = path;
        else free( path );
        return fp;
    }
    free( path );
    return NULL;
}

pp_pop_define_state()

void pp_pop_define_state

(

void

)

Definition at line 161 of file preproc.c.

{
    int i;
    pp_entry_t *ppp;
    pp_def_state_t *state;
 
    for (i = 0; i < HASHKEY; i++)
    {
        while ((ppp = pp_def_state->defines[i]) != NULL) pp_del_define( ppp->ident );
    }
    state = pp_def_state;
    pp_def_state = state->next;
    free( state );
}

Referenced by wpp_parse().

pp_pop_if()

pp_if_state_t pp_pop_if

(

void

)

Definition at line 380 of file preproc.c.

{
    if(if_stack_idx <= 0)
    {
        ppy_error("#{endif,else,elif} without #{if,ifdef,ifndef} (#if-stack underflow)");
        return if_error;
    }
 
    switch(pp_if_state())
    {
    case if_true:
    case if_elsetrue:
        break;
    case if_false:
    case if_elsefalse:
    case if_elif:
    case if_ignore:
        pp_pop_ignore_state();
        break;
    default:
        pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d)", (int)pp_if_state());
    }
    return if_stack[--if_stack_idx];
}

Referenced by wpp_parse().

pp_push_define_state()

int pp_push_define_state

(

void

)

Definition at line 148 of file preproc.c.

{
    pp_def_state_t *state = pp_xmalloc( sizeof(*state) );
    if(!state)
        return 1;
 
    memset( state->defines, 0, sizeof(state->defines) );
    state->next = pp_def_state;
    pp_def_state = state;
    return 0;
}

Referenced by wpp_parse().

pp_push_if()

void pp_push_if

(

pp_if_state_t

s

)

Definition at line 357 of file preproc.c.

{
    if(if_stack_idx >= MAXIFSTACK)
        pp_internal_error(__FILE__, __LINE__, "#if-stack overflow; #{if,ifdef,ifndef} nested too deeply (> %d)", MAXIFSTACK);
 
    if_stack[if_stack_idx++] = s;
 
    switch(s)
    {
    case if_true:
    case if_elsetrue:
        break;
    case if_false:
    case if_elsefalse:
    case if_elif:
    case if_ignore:
        pp_push_ignore_state();
        break;
    default:
        pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d)", (int)pp_if_state());
    }
}

Referenced by pp_next_if_state().

pp_xmalloc()

void * pp_xmalloc

(

size_t

size

)

Definition at line 45 of file preproc.c.

{
    void *res;
 
    assert(size > 0);
    res = malloc(size);
    if(res == NULL)
    {
        /* Set the error flag */
        pp_status.state = 1;
    }
    return res;
}

Referenced by pp_add_define(), pp_add_macro(), pp_push_define_state(), pp_xstrdup(), and wpp_add_define().

pp_xrealloc()

void * pp_xrealloc	(	void *	p,
		size_t	size
	)

Definition at line 59 of file preproc.c.

{
    void *res;
 
    assert(size > 0);
    res = realloc(p, size);
    if(res == NULL)
    {
        /* Set the error flag */
        pp_status.state = 1;
    }
    return res;
}

pp_xstrdup()

char * pp_xstrdup

(

const char *

str

)

Definition at line 73 of file preproc.c.

{
    char *s;
    int len;
 
    assert(str != NULL);
    len = strlen(str)+1;
    s = pp_xmalloc(len);
    if(!s)
        return NULL;
    return memcpy(s, str, len);
}

Referenced by pp_add_define(), pp_add_macro(), wpp_add_define(), and wpp_parse().

pphash()

static int pphash ( const char *  str )

static

Definition at line 87 of file preproc.c.

{
    int sum = 0;
    while(*str)
        sum += *str++;
    return sum % HASHKEY;
}

Referenced by pp_add_define(), pp_add_macro(), pp_del_define(), and pplookup().

pplookup()

pp_entry_t * pplookup

(

const char *

ident

)

Definition at line 95 of file preproc.c.

{
    int idx;
    pp_entry_t *ppp;
 
    if(!ident)
        return NULL;
    idx = pphash(ident);
    for(ppp = pp_def_state->defines[idx]; ppp; ppp = ppp->next)
    {
        if(!strcmp(ident, ppp->ident))
            return ppp;
    }
    return NULL;
}

Referenced by pp_add_define(), pp_add_macro(), and pp_del_define().

Variable Documentation

if_stack

pp_if_state_t if_stack[MAXIFSTACK]

static

Definition at line 42 of file preproc.c.

Referenced by pp_if_state(), pp_pop_if(), and pp_push_if().

if_stack_idx

int if_stack_idx = 0

static

Definition at line 43 of file preproc.c.

Referenced by pp_get_if_depth(), pp_if_state(), pp_pop_if(), and pp_push_if().

pp_def_state

pp_def_state_t* pp_def_state

static

Definition at line 39 of file preproc.c.

pp_status

struct pp_status pp_status

Definition at line 29 of file preproc.c.