wpp.c File Reference

#include "config.h"
#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
#include "../tools.h"
#include "utils.h"
#include "wpp_private.h"

Include dependency graph for wpp.c:

Go to the source code of this file.

Classes
struct	define

Macros
#define	HASHKEY   2039
#define	MAXIFSTACK   64

Functions
static char *	wpp_lookup (const char *name, int type, const char *parent_name)
static int	pphash (const char *str)
pp_entry_t *	pplookup (const char *ident)
static void	free_pp_entry (pp_entry_t *ppp, int idx)
static void	pp_init_define_state (void)
static void	pp_free_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, char *args[], int nargs, int variadic, mtext_t *exp)
void	wpp_add_include_path (const char *path)
char *	wpp_find_include (const char *name, const char *parent_name)
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)
static void	generic_msg (const char *s, const char *t, const char *n, va_list ap)
int	ppy_error (const char *s,...)
int	ppy_warning (const char *s,...)
static void	add_cmdline_defines (void)
static void	add_special_defines (void)
static void	wpp_add_define (const char *name, const char *value)
void	wpp_del_define (const char *name)
void	wpp_add_cmdline_define (const char *value)
void	wpp_set_debug (int lex_debug, int parser_debug, int msg_debug)
int	wpp_parse (const char *input, FILE *output)

Variables
struct pp_status	pp_status
static struct list	pp_defines [HASHKEY]
static pp_if_state_t	if_stack [MAXIFSTACK]
static int	if_stack_idx = 0
int	ppy_debug
int	pp_flex_debug
static struct list	cmdline_defines = LIST_INIT( cmdline_defines )
static struct strarray	includes
static const char *const	pp_if_state_str []

Macro Definition Documentation

HASHKEY

#define HASHKEY   2039

Definition at line 39 of file wpp.c.

MAXIFSTACK

#define MAXIFSTACK   64

Definition at line 43 of file wpp.c.

Function Documentation

add_cmdline_defines()

static void add_cmdline_defines ( void  )

static

Definition at line 517 of file wpp.c.

{
    struct define *def;
 
    LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
    {
        if (def->value) pp_add_define( def->name, def->value );
    }
}

Referenced by wpp_parse().

add_special_defines()

static void add_special_defines ( void  )

static

Definition at line 527 of file wpp.c.

{
    time_t now = time(NULL);
    pp_entry_t *ppp;
    char buf[32];
 
    strftime(buf, sizeof(buf), "\"%b %d %Y\"", localtime(&now));
    pp_add_define( "__DATE__", buf );
 
    strftime(buf, sizeof(buf), "\"%H:%M:%S\"", localtime(&now));
    pp_add_define( "__TIME__", buf );
 
    ppp = pp_add_define( "__FILE__", "" );
    ppp->type = def_special;
 
    ppp = pp_add_define( "__LINE__", "" );
    ppp->type = def_special;
}

Referenced by wpp_parse().

free_pp_entry()

static void free_pp_entry ( pp_entry_t *  ppp, int  idx  )

static

Definition at line 140 of file wpp.c.

{
    if(ppp->iep)
    {
                list_remove( &ppp->iep->entry );
        free(ppp->iep->filename);
        free(ppp->iep);
    }
        list_remove( &ppp->entry );
    free(ppp);
}

Referenced by pp_del_define(), and pp_free_define_state().

generic_msg()

static void generic_msg ( const char *  s, const char *  t, const char *  n, va_list  ap  )

static

Definition at line 491 of file wpp.c.

{
    fprintf(stderr, "%s:%d:%d: %s: ", pp_status.input ? pp_status.input : "stdin",
                pp_status.line_number, pp_status.char_number, t);
    vfprintf(stderr, s, ap);
    fprintf(stderr, "\n");
}

Referenced by ppy_error(), and ppy_warning().

pp_add_define()

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

Definition at line 199 of file wpp.c.

{
    int len;
    char *cptr;
    int idx;
    pp_entry_t *ppp;
 
    idx = pphash(def);
    if((ppp = pplookup(def)) != NULL)
    {
        if(pedantic)
            ppy_warning("Redefinition of %s\n%s:%d: note: previous definition was here",
                                    def, ppp->filename, ppp->linenumber);
        pp_del_define(def);
    }
    ppp = xmalloc(sizeof(pp_entry_t));
    memset( ppp, 0, sizeof(*ppp) );
    ppp->ident = xstrdup(def);
    ppp->type = def_define;
    ppp->subst.text = text ? xstrdup(text) : NULL;
    ppp->filename = xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
    ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
        list_add_head( &pp_defines[idx], &ppp->entry );
    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);
    }
    if(pp_status.debug)
        printf("Added define (%s, %d) <%s> to <%s>\n", pp_status.input, pp_status.line_number, ppp->ident, ppp->subst.text ? ppp->subst.text : "(null)");
 
    return ppp;
}

Referenced by add_cmdline_defines(), and add_special_defines().

pp_add_macro()

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

Definition at line 242 of file wpp.c.

{
    int idx;
    pp_entry_t *ppp;
 
    idx = pphash(id);
    if((ppp = pplookup(id)) != NULL)
    {
        if(pedantic)
            ppy_warning("Redefinition of %s\n%s:%d: note: previous definition was here",
                                    id, ppp->filename, ppp->linenumber);
        pp_del_define(id);
    }
    ppp = xmalloc(sizeof(pp_entry_t));
    memset( ppp, 0, sizeof(*ppp) );
    ppp->ident  = id;
    ppp->type   = def_macro;
    ppp->margs  = args;
    ppp->nargs  = nargs;
    ppp->variadic   = variadic;
    ppp->subst.mtext= exp;
    ppp->filename = xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
    ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
        list_add_head( &pp_defines[idx], &ppp->entry );
    if(pp_status.debug)
    {
        fprintf(stderr, "Added macro (%s, %d) <%s(%d%s)> to <", pp_status.input, pp_status.line_number, ppp->ident, nargs, variadic ? ",va" : "");
        for(; exp; exp = exp->next)
        {
            switch(exp->type)
            {
            case exp_text:
                fprintf(stderr, " \"%s\" ", exp->subst.text);
                break;
            case exp_stringize:
                fprintf(stderr, " #(%d) ", exp->subst.argidx);
                break;
            case exp_concat:
                fprintf(stderr, "##");
                break;
            case exp_subst:
                fprintf(stderr, " <%d> ", exp->subst.argidx);
                break;
            }
        }
        fprintf(stderr, ">\n");
    }
    return ppp;
}

pp_del_define()

void pp_del_define

(

const char *

name

)

Definition at line 178 of file wpp.c.

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

Referenced by pp_add_define(), and pp_add_macro().

pp_free_define_state()

static void pp_free_define_state ( void  )

static

Definition at line 161 of file wpp.c.

{
    int i;
    pp_entry_t *ppp, *ppp2;
 
    for (i = 0; i < HASHKEY; i++)
    {
        LIST_FOR_EACH_ENTRY_SAFE( ppp, ppp2, &pp_defines[i], pp_entry_t, entry )
        {
            free( ppp->ident );
            free( ppp->subst.text );
            free( ppp->filename );
            free_pp_entry( ppp, i );
        }
    }
}

Referenced by wpp_parse().

pp_get_if_depth()

int pp_get_if_depth

(

void

)

Definition at line 486 of file wpp.c.

{
    return if_stack_idx;
}

Referenced by wpp_parse().

pp_if_state()

pp_if_state_t pp_if_state

(

void

)

Definition at line 458 of file wpp.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_init_define_state()

static void pp_init_define_state ( void  )

static

Definition at line 153 of file wpp.c.

{
    int i;
 
    for (i = 0; i < HASHKEY; i++) list_init( &pp_defines[i] );
}

Referenced by wpp_parse().

pp_next_if_state()

void pp_next_if_state

(

int

i

)

Definition at line 467 of file wpp.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;
    case if_error:
        assert(0);
    }
}

pp_open_include()

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

Definition at line 320 of file wpp.c.

{
    char *path;
    void *fp;
 
    if (!(path = wpp_lookup(name, type, parent_name))) return NULL;
    fp = fopen(path, "rt");
 
    if (fp)
    {
        if (pp_status.debug)
            printf("Going to include <%s>\n", path);
        if (newpath) *newpath = path;
        else free( path );
        return fp;
    }
    free( path );
    return NULL;
}

pp_pop_if()

pp_if_state_t pp_pop_if

(

void

)

Definition at line 423 of file wpp.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;
    case if_error:
        assert(0);
    }
 
    if(pp_flex_debug)
        fprintf(stderr, "Pop if %s:%d: %s(%d) -> %s(%d)\n",
                pp_status.input,
                pp_status.line_number,
                pp_if_state_str[pp_if_state()],
                if_stack_idx,
                pp_if_state_str[if_stack[if_stack_idx <= 1 ? if_true : if_stack_idx-2]],
                if_stack_idx-1);
 
    return if_stack[--if_stack_idx];
}

Referenced by wpp_parse().

pp_push_if()

void pp_push_if

(

pp_if_state_t

s

)

Definition at line 397 of file wpp.c.

{
    if(if_stack_idx >= MAXIFSTACK)
        error("#if-stack overflow; #{if,ifdef,ifndef} nested too deeply (> %d)\n", MAXIFSTACK);
 
    if(pp_flex_debug)
        fprintf(stderr, "Push if %s:%d: %s(%d) -> %s(%d)\n", pp_status.input, pp_status.line_number, pp_if_state_str[pp_if_state()], if_stack_idx, pp_if_state_str[s], if_stack_idx+1);
 
    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;
    case if_error:
        assert(0);
    }
}

Referenced by pp_next_if_state().

pphash()

static int pphash ( const char *  str )

static

Definition at line 116 of file wpp.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 124 of file wpp.c.

{
    int idx;
    pp_entry_t *ppp;
 
    if(!ident)
        return NULL;
    idx = pphash(ident);
        LIST_FOR_EACH_ENTRY( ppp, &pp_defines[idx], pp_entry_t, entry )
    {
        if(!strcmp(ident, ppp->ident))
            return ppp;
    }
    return NULL;
}

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

ppy_error()

int ppy_error	(	const char *	s,
			...
	)

Definition at line 499 of file wpp.c.

{
    va_list ap;
    va_start(ap, s);
    generic_msg(s, "error", ppy_text, ap);
    va_end(ap);
    exit(1);
}

Referenced by pp_pop_if(), and wpp_parse().

ppy_warning()

int ppy_warning	(	const char *	s,
			...
	)

Definition at line 508 of file wpp.c.

{
    va_list ap;
    va_start(ap, s);
    generic_msg(s, "warning", ppy_text, ap);
    va_end(ap);
    return 0;
}

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

wpp_add_cmdline_define()

void wpp_add_cmdline_define

(

const char *

value

)

Definition at line 588 of file wpp.c.

{
    char *p;
    char *str = xstrdup(value);
 
    p = strchr( str, '=' );
    if (p) *p++ = 0;
    wpp_add_define( str, p );
    free( str );
}

Referenced by add_widl_version_define(), main(), and option_callback().

wpp_add_define()

static void wpp_add_define ( const char *  name, const char *  value  )

static

Definition at line 547 of file wpp.c.

{
    struct define *def;
 
    if (!value) value = "";
 
    LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
    {
        if (!strcmp( def->name, name ))
        {
            free( def->value );
            def->value = xstrdup(value);
            return;
        }
    }
 
    def = xmalloc( sizeof(*def) );
    def->name  = xstrdup(name);
    def->value = xstrdup(value);
    list_add_head( &cmdline_defines, &def->entry );
}

Referenced by wpp_add_cmdline_define().

wpp_add_include_path()

void wpp_add_include_path

(

const char *

path

)

Definition at line 298 of file wpp.c.

{
    char *dir = xstrdup(path);
    char *cptr;
 
    for(cptr = dir; *cptr; cptr++)
    {
        /* Convert to forward slash */
        if(*cptr == '\\')
            *cptr = '/';
    }
    /* Kill eventual trailing '/' */
    if(*(cptr = dir + strlen(dir)-1) == '/') *cptr = '\0';
 
        strarray_add( &includes, dir );
}

Referenced by main(), and option_callback().

wpp_del_define()

void wpp_del_define

(

const char *

name

)

Definition at line 571 of file wpp.c.

{
    struct define *def;
 
    LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
    {
        if (!strcmp( def->name, name ))
        {
            free( def->value );
            def->value = NULL;
            return;
        }
    }
}

wpp_find_include()

char * wpp_find_include	(	const char *	name,
		const char *	parent_name
	)

Definition at line 315 of file wpp.c.

{
    return wpp_lookup(name, !!parent_name, parent_name);
}

Referenced by find_input_file().

wpp_lookup()

static char * wpp_lookup ( const char *  name, int  type, const char *  parent_name  )

static

Definition at line 59 of file wpp.c.

{
    char *cpy;
    char *cptr;
    char *path;
    const char *ccptr;
    int i, fd;
 
    cpy = xmalloc(strlen(name)+1);
    cptr = cpy;
 
    for(ccptr = name; *ccptr; ccptr++)
    {
        /* Convert to forward slash */
        if(*ccptr == '\\') {
            /* kill double backslash */
            if(ccptr[1] == '\\')
                ccptr++;
            *cptr = '/';
        }else {
            *cptr = *ccptr;
        }
        cptr++;
    }
    *cptr = '\0';
 
    if(type && parent_name)
    {
        /* Search directory of parent include and then -I path */
        path = strmake( "%s/%s", get_dirname(parent_name), cpy );
        fd = open( path, O_RDONLY );
        if (fd != -1)
        {
            close( fd );
            free( cpy );
            return path;
        }
        free( path );
    }
    /* Search -I path */
    for(i = 0; i < includes.count; i++)
    {
        path = strmake("%s/%s", includes.str[i], cpy);
        fd = open( path, O_RDONLY );
        if (fd != -1)
        {
            close( fd );
            free( cpy );
            return path;
        }
        free( path );
    }
    free( cpy );
    return NULL;
}

Referenced by pp_open_include(), and wpp_find_include().

wpp_parse()

int wpp_parse	(	const char *	input,
		FILE *	output
	)

Definition at line 610 of file wpp.c.

{
    int ret;
 
    pp_status.input = NULL;
    pp_status.line_number = 1;
    pp_status.char_number = 1;
 
    pp_init_define_state();
    add_cmdline_defines();
    add_special_defines();
 
    if (!input) pp_status.file = stdin;
    else if (!(pp_status.file = fopen(input, "rt")))
        ppy_error("Could not open %s\n", input);
 
    pp_status.input = input ? xstrdup(input) : NULL;
 
    ppy_out = output;
    fprintf(ppy_out, "# 1 \"%s\" 1\n", input ? input : "");
 
    ret = ppy_parse();
 
    if (input)
    {
    fclose(pp_status.file);
    free(pp_status.input);
    }
    /* Clean if_stack, it could remain dirty on errors */
    while (pp_get_if_depth()) pp_pop_if();
    pp_free_define_state();
    return ret;
}

wpp_set_debug()

void wpp_set_debug	(	int	lex_debug,
		int	parser_debug,
		int	msg_debug
	)

Definition at line 601 of file wpp.c.

{
    pp_flex_debug   = lex_debug;
    ppy_debug       = parser_debug;
    pp_status.debug = msg_debug;
}

Referenced by main().

Variable Documentation

cmdline_defines

struct list cmdline_defines = LIST_INIT( cmdline_defines )

static

Definition at line 56 of file wpp.c.

Referenced by add_cmdline_defines(), wpp_add_define(), and wpp_del_define().

if_stack

pp_if_state_t if_stack[MAXIFSTACK]

static

Definition at line 44 of file wpp.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 45 of file wpp.c.

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

includes

struct strarray includes

static

Definition at line 57 of file wpp.c.

Referenced by wpp_add_include_path(), and wpp_lookup().

pp_defines

struct list pp_defines[HASHKEY]

static

Definition at line 41 of file wpp.c.

Referenced by pp_add_define(), pp_add_macro(), pp_free_define_state(), pp_init_define_state(), and pplookup().

pp_flex_debug

int pp_flex_debug

Definition at line 47 of file wpp.c.

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

pp_if_state_str

const char* const pp_if_state_str[]

static

Initial value:

= {
    "if_false",
    "if_true",
    "if_elif",
    "if_elsefalse",
    "if_elsetrue",
    "if_ignore"
}

Definition at line 388 of file wpp.c.

Referenced by pp_pop_if(), and pp_push_if().

pp_status

struct pp_status pp_status

Definition at line 37 of file wpp.c.

ppy_debug

int ppy_debug

Definition at line 47 of file wpp.c.

Referenced by wpp_set_debug().