aboutsummaryrefslogtreecommitdiffstats
path: root/e-util/e-sexp.c
diff options
context:
space:
mode:
Diffstat (limited to 'e-util/e-sexp.c')
-rw-r--r--e-util/e-sexp.c1121
1 files changed, 0 insertions, 1121 deletions
diff --git a/e-util/e-sexp.c b/e-util/e-sexp.c
deleted file mode 100644
index 7d7b5f5f0f..0000000000
--- a/e-util/e-sexp.c
+++ /dev/null
@@ -1,1121 +0,0 @@
-/*
- * Copyright 2000 HelixCode (http://www.helixcode.com).
- *
- * A simple, extensible s-exp evaluation engine.
- *
- * Author :
- * Michael Zucchi <notzed@helixcode.com>
-
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-
-/*
- The following built-in s-exp's are supported:
-
- list = (and list*)
- perform an intersection of a number of lists, and return that.
-
- bool = (and bool*)
- perform a boolean AND of boolean values.
-
- list = (or list*)
- perform a union of a number of lists, returning the new list.
-
- bool = (or bool*)
- perform a boolean OR of boolean values.
-
- int = (+ int*)
- Add integers.
-
- string = (+ string*)
- Concat strings.
-
- int = (- int int*)
- Subtract integers from the first.
-
- Comparison operators:
-
- bool = (< int int)
- bool = (> int int)
- bool = (= int int)
-
- bool = (< string string)
- bool = (> string string)
- bool = (= string string)
- Perform a comparision of 2 integers, or 2 string values.
-
- Function flow:
-
- type = (if bool function)
- type = (if bool function function)
- Choose a flow path based on a boolean value
-
- type = (begin func func func)
- Execute a sequence. The last function return is the return type.
-*/
-
-#include <glib.h>
-#include <stdio.h>
-#include <time.h>
-#include <string.h>
-
-#include "e-sexp.h"
-
-#define p(x) /* parse debug */
-#define r(x) /* run debug */
-#define d(x) /* general debug */
-
-
-static struct _ESExpTerm * parse_list(ESExp *f, int gotbrace);
-static struct _ESExpTerm * parse_value(ESExp *f);
-
-static void parse_dump_term(struct _ESExpTerm *t, int depth);
-
-static GtkObjectClass *parent_class;
-
-
-
-static GScannerConfig scanner_config =
-{
- ( " \t\r\n") /* cset_skip_characters */,
- ( G_CSET_a_2_z
- "_+<=>"
- G_CSET_A_2_Z) /* cset_identifier_first */,
- ( G_CSET_a_2_z
- "_0123456789-<>"
- G_CSET_A_2_Z
- G_CSET_LATINS
- G_CSET_LATINC ) /* cset_identifier_nth */,
- ( ";\n" ) /* cpair_comment_single */,
-
- FALSE /* case_sensitive */,
-
- TRUE /* skip_comment_multi */,
- TRUE /* skip_comment_single */,
- TRUE /* scan_comment_multi */,
- TRUE /* scan_identifier */,
- TRUE /* scan_identifier_1char */,
- FALSE /* scan_identifier_NULL */,
- TRUE /* scan_symbols */,
- FALSE /* scan_binary */,
- TRUE /* scan_octal */,
- TRUE /* scan_float */,
- TRUE /* scan_hex */,
- FALSE /* scan_hex_dollar */,
- TRUE /* scan_string_sq */,
- TRUE /* scan_string_dq */,
- TRUE /* numbers_2_int */,
- FALSE /* int_2_float */,
- FALSE /* identifier_2_string */,
- TRUE /* char_2_token */,
- FALSE /* symbol_2_token */,
- FALSE /* scope_0_fallback */,
-};
-
-struct _ESExpResult *
-e_sexp_result_new(int type)
-{
- struct _ESExpResult *r = g_malloc0(sizeof(*r));
- r->type = type;
- return r;
-}
-
-void
-e_sexp_result_free(struct _ESExpResult *t)
-{
- if (t == NULL)
- return;
-
- switch(t->type) {
- case ESEXP_RES_ARRAY_PTR:
- g_ptr_array_free(t->value.ptrarray, TRUE);
- break;
- case ESEXP_RES_BOOL:
- case ESEXP_RES_INT:
- break;
- case ESEXP_RES_STRING:
- g_free(t->value.string);
- break;
- case ESEXP_RES_UNDEFINED:
- break;
- }
- g_free(t);
-}
-
-/* implementations for the builtin functions */
-
-/* can you tell, i dont like glib? */
-/* we can only itereate a hashtable from a called function */
-struct _glib_sux_donkeys {
- int count;
- GPtrArray *uids;
-};
-
-/* ok, store any values that are in all sets */
-static void
-g_lib_sux_htand(char *key, int value, struct _glib_sux_donkeys *fuckup)
-{
- if (value == fuckup->count) {
- g_ptr_array_add(fuckup->uids, key);
- }
-}
-
-/* or, store all unique values */
-static void
-g_lib_sux_htor(char *key, int value, struct _glib_sux_donkeys *fuckup)
-{
- g_ptr_array_add(fuckup->uids, key);
-}
-
-static ESExpResult *
-term_eval_and(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r, *r1;
- GHashTable *ht = g_hash_table_new(g_str_hash, g_str_equal);
- struct _glib_sux_donkeys lambdafoo;
- int type=-1;
- int bool = TRUE;
- int i;
-
- r(printf("( and\n"));
-
- r = e_sexp_result_new(ESEXP_RES_UNDEFINED);
-
- for (i=0;bool && i<argc;i++) {
- r1 = e_sexp_term_eval(f, argv[i]);
- if (type == -1)
- type = r1->type;
- if (type != r1->type) {
- printf("invalid types in and operation, all types must be the same\n");
- } else if ( r1->type == ESEXP_RES_ARRAY_PTR ) {
- char **a1;
- int l1, j;
-
- a1 = (char **)r1->value.ptrarray->pdata;
- l1 = r1->value.ptrarray->len;
- for (j=0;j<l1;j++) {
- int n;
- n = (int)g_hash_table_lookup(ht, a1[j]);
- g_hash_table_insert(ht, a1[j], (void *)n+1);
- }
- } else if ( r1->type == ESEXP_RES_BOOL ) {
- bool &= r1->value.bool;
- }
- e_sexp_result_free(r1);
- }
-
- if (type == ESEXP_RES_ARRAY_PTR) {
- lambdafoo.count = argc;
- lambdafoo.uids = g_ptr_array_new();
- g_hash_table_foreach(ht, (GHFunc)g_lib_sux_htand, &lambdafoo);
- r->type = ESEXP_RES_ARRAY_PTR;
- r->value.ptrarray = lambdafoo.uids;
- } else if (type == ESEXP_RES_BOOL) {
- r->type = ESEXP_RES_BOOL;
- r->value.bool = bool;
- }
-
- g_hash_table_destroy(ht);
-
- return r;
-}
-
-static ESExpResult *
-term_eval_or(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r, *r1;
- GHashTable *ht = g_hash_table_new(g_str_hash, g_str_equal);
- struct _glib_sux_donkeys lambdafoo;
- int type = -1;
- int bool = FALSE;
- int i;
-
- r(printf("(or \n"));
-
- r = e_sexp_result_new(ESEXP_RES_UNDEFINED);
-
- for (i=0;!bool && i<argc;i++) {
- r1 = e_sexp_term_eval(f, argv[i]);
- if (type == -1)
- type = r1->type;
- if (r1->type != type) {
- printf("wrong types in or operation\n");
- } else if (r1->type == ESEXP_RES_ARRAY_PTR) {
- char **a1;
- int l1, j;
-
- a1 = (char **)r1->value.ptrarray->pdata;
- l1 = r1->value.ptrarray->len;
- for (j=0;j<l1;j++) {
- g_hash_table_insert(ht, a1[j], (void *)1);
- }
- } else if (r1->type == ESEXP_RES_BOOL) {
- bool |= r1->value.bool;
- }
- e_sexp_result_free(r1);
- }
-
- if (type == ESEXP_RES_ARRAY_PTR) {
- lambdafoo.count = argc;
- lambdafoo.uids = g_ptr_array_new();
- g_hash_table_foreach(ht, (GHFunc)g_lib_sux_htor, &lambdafoo);
- r->type = ESEXP_RES_ARRAY_PTR;
- r->value.ptrarray = lambdafoo.uids;
- } else if (type == ESEXP_RES_BOOL) {
- r->type = ESEXP_RES_BOOL;
- r->value.bool = bool;
- }
- g_hash_table_destroy(ht);
-
- return r;
-}
-
-static ESExpResult *
-term_eval_not(struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
-{
- int res = TRUE;
- ESExpResult *r;
-
- if (argc>0) {
- if (argv[0]->type == ESEXP_RES_BOOL
- && argv[0]->value.bool)
- res = FALSE;
- }
- r = e_sexp_result_new(ESEXP_RES_BOOL);
- r->value.bool = res;
- return r;
-}
-
-/* this should support all arguments ...? */
-static ESExpResult *
-term_eval_lt(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r, *r1, *r2;
-
- r = e_sexp_result_new(ESEXP_RES_UNDEFINED);
-
- if (argc == 2) {
- r1 = e_sexp_term_eval(f, argv[0]);
- r2 = e_sexp_term_eval(f, argv[1]);
- if (r1->type != r2->type) {
- printf("error, invalid types in compare\n");
- } else if (r1->type == ESEXP_RES_INT) {
- r->type = ESEXP_RES_BOOL;
- r->value.bool = r1->value.number < r2->value.number;
- } else if (r1->type == ESEXP_RES_STRING) {
- r->type = ESEXP_RES_BOOL;
- r->value.bool = strcmp(r1->value.string, r2->value.string) < 0;
- }
- }
- return r;
-}
-
-/* this should support all arguments ...? */
-static ESExpResult *
-term_eval_gt(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r, *r1, *r2;
-
- r = e_sexp_result_new(ESEXP_RES_UNDEFINED);
-
- if (argc == 2) {
- r1 = e_sexp_term_eval(f, argv[0]);
- r2 = e_sexp_term_eval(f, argv[1]);
- if (r1->type != r2->type) {
- printf("error, invalid types in compare\n");
- } else if (r1->type == ESEXP_RES_INT) {
- r->type = ESEXP_RES_BOOL;
- r->value.bool = r1->value.number > r2->value.number;
- } else if (r1->type == ESEXP_RES_STRING) {
- r->type = ESEXP_RES_BOOL;
- r->value.bool = strcmp(r1->value.string, r2->value.string) > 0;
- }
- }
- return r;
-}
-
-/* this should support all arguments ...? */
-static ESExpResult *
-term_eval_eq(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r, *r1, *r2;
-
- r = e_sexp_result_new(ESEXP_RES_BOOL);
-
- if (argc == 2) {
- r1 = e_sexp_term_eval(f, argv[0]);
- r2 = e_sexp_term_eval(f, argv[1]);
- if (r1->type != r2->type) {
- r->value.bool = FALSE;
- } else if (r1->type == ESEXP_RES_INT) {
- r->value.bool = r1->value.number == r2->value.number;
- } else if (r1->type == ESEXP_RES_BOOL) {
- r->value.bool = r1->value.bool == r2->value.bool;
- } else if (r1->type == ESEXP_RES_STRING) {
- r->value.bool = strcmp(r1->value.string, r2->value.string) == 0;
- }
- }
- return r;
-}
-
-static ESExpResult *
-term_eval_plus(struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
-{
- struct _ESExpResult *r=NULL;
- int type;
- int i;
-
- if (argc>0) {
- type = argv[0]->type;
- switch(type) {
- case ESEXP_RES_INT: {
- int total = argv[0]->value.number;
- for (i=1;i<argc && argv[i]->type == ESEXP_RES_INT;i++) {
- total += argv[i]->value.number;
- }
- if (i<argc) {
- g_warning("Wrong type trying to add integers: ignored");
- }
- r = e_sexp_result_new(ESEXP_RES_INT);
- r->value.number = total;
- break; }
- case ESEXP_RES_STRING: {
- GString *s = g_string_new(argv[0]->value.string);
- for (i=1;i<argc && argv[i]->type == ESEXP_RES_STRING;i++) {
- g_string_append(s, argv[i]->value.string);
- }
- if (i<argc) {
- g_warning("Wrong type trying to concat strings: ignored");
- }
- r = e_sexp_result_new(ESEXP_RES_STRING);
- r->value.string = s->str;
- g_string_free(s, FALSE);
- break; }
-
- }
- }
-
- if (!r) {
- r = e_sexp_result_new(ESEXP_RES_INT);
- r->value.number = 0;
- }
- return r;
-}
-
-static ESExpResult *
-term_eval_sub(struct _ESExp *f, int argc, struct _ESExpResult **argv, void *data)
-{
- struct _ESExpResult *r=NULL;
- int type;
- int i;
-
- if (argc>0) {
- type = argv[0]->type;
- switch(type) {
- case ESEXP_RES_INT: {
- int total = argv[0]->value.number;
- for (i=1;i<argc && argv[i]->type == ESEXP_RES_INT;i++) {
- total -= argv[i]->value.number;
- }
- if (i<argc) {
- g_warning("Wrong type trying to subtract numbers: ignored");
- }
- r = e_sexp_result_new(ESEXP_RES_INT);
- r->value.number = total;
- break; }
- }
- }
-
- if (!r) {
- r = e_sexp_result_new(ESEXP_RES_INT);
- r->value.number = 0;
- }
- return r;
-}
-
-/* implements 'if' function */
-static ESExpResult *
-term_eval_if(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r;
- int doit;
-
- if (argc >=2 && argc<=3) {
- r = e_sexp_term_eval(f, argv[0]);
- doit = (r->type == ESEXP_RES_BOOL && r->value.bool);
- e_sexp_result_free(r);
- if (doit) {
- return e_sexp_term_eval(f, argv[1]);
- } else if (argc>2) {
- return e_sexp_term_eval(f, argv[2]);
- }
- }
- return e_sexp_result_new(ESEXP_RES_UNDEFINED);
-}
-
-/* implements 'begin' statement */
-static ESExpResult *
-term_eval_begin(struct _ESExp *f, int argc, struct _ESExpTerm **argv, void *data)
-{
- struct _ESExpResult *r=NULL;
- int i;
-
- for (i=0;i<argc;i++) {
- if (r)
- e_sexp_result_free(r);
- r = e_sexp_term_eval(f, argv[i]);
- }
- if (r)
- return r;
- else
- return e_sexp_result_new(ESEXP_RES_UNDEFINED);
-}
-
-
-struct _ESExpResult *
-e_sexp_term_eval(struct _ESExp *f, struct _ESExpTerm *t)
-{
- struct _ESExpResult *r, *r1;
- int i;
-
- r(printf("eval term :\n"));
- r(parse_dump_term(t, 0));
-
- r = g_malloc0(sizeof(*r));
- r->type = ESEXP_RES_UNDEFINED;
-
- switch (t->type) {
- case ESEXP_TERM_STRING:
- r(printf(" (string \"%s\")\n", t->value.string));
- r->type = ESEXP_RES_STRING;
- /* erk, this shoul;dn't need to strdup this ... */
- r->value.string = g_strdup(t->value.string);
- break;
- case ESEXP_TERM_INT:
- r(printf(" (int %d)\n", t->value.number));
- r->type = ESEXP_RES_INT;
- r->value.number = t->value.number;
- break;
- case ESEXP_TERM_BOOL:
- r(printf(" (int %d)\n", t->value.number));
- r->type = ESEXP_RES_BOOL;
- r->value.bool = t->value.bool;
- break;
- case ESEXP_TERM_IFUNC: {
- if (t->value.func.sym->f.ifunc) {
- r1 = t->value.func.sym->f.ifunc(f, t->value.func.termcount, t->value.func.terms, t->value.func.sym->data);
- if (r1) {
- e_sexp_result_free(r);
- r = r1;
- }
- }
- break; }
- case ESEXP_TERM_FUNC: {
- struct _ESExpResult **argv;
-
- /* first evaluate all arguments to result types */
- argv = alloca(sizeof(argv[0]) * t->value.func.termcount);
- for (i=0;i<t->value.func.termcount;i++) {
- argv[i] = e_sexp_term_eval(f, t->value.func.terms[i]);
- }
- /* call the function */
- if (t->value.func.sym->f.func) {
- r1 = t->value.func.sym->f.func(f, t->value.func.termcount, argv, t->value.func.sym->data);
- if (r1) {
- e_sexp_result_free(r);
- r = r1;
- }
- }
- for (i=0;i<t->value.func.termcount;i++) {
- e_sexp_result_free(argv[i]);
- }
- break; }
- default:
- printf("Warning: Unknown type encountered in parse tree: %d\n", t->type);
- r->type = ESEXP_RES_UNDEFINED;
- }
-
- return r;
-}
-
-
-static void
-eval_dump_result(ESExpResult *r, int depth)
-{
- int i;
-
- if (r==NULL) {
- printf("null result???\n");
- return;
- }
-
- for (i=0;i<depth;i++)
- printf(" ");
-
- switch (r->type) {
- case ESEXP_RES_ARRAY_PTR:
- printf("array pointers\n");
- break;
- case ESEXP_RES_INT:
- printf("int: %d\n", r->value.number);
- break;
- case ESEXP_RES_STRING:
- printf("string: '%s'\n", r->value.string);
- break;
- case ESEXP_RES_BOOL:
- printf("bool: %c\n", r->value.bool?'t':'f');
- break;
- case ESEXP_RES_UNDEFINED:
- printf(" <undefined>\n");
- break;
- }
- printf("\n");
-}
-
-static void
-parse_dump_term(struct _ESExpTerm *t, int depth)
-{
- int i;
-
- if (t==NULL) {
- printf("null term??\n");
- return;
- }
-
- for (i=0;i<depth;i++)
- printf(" ");
-
- switch (t->type) {
- case ESEXP_TERM_STRING:
- printf(" \"%s\"", t->value.string);
- break;
- case ESEXP_TERM_INT:
- printf(" %d", t->value.number);
- break;
- case ESEXP_TERM_BOOL:
- printf(" #%c", t->value.bool?'t':'f');
- break;
- case ESEXP_TERM_IFUNC:
- case ESEXP_TERM_FUNC:
- printf(" (function %s\n", t->value.func.sym->name);
- /*printf(" [%d] ", t->value.func.termcount);*/
- for (i=0;i<t->value.func.termcount;i++) {
- parse_dump_term(t->value.func.terms[i], depth+1);
- }
- for (i=0;i<depth;i++)
- printf(" ");
- printf(" )");
- break;
- case ESEXP_TERM_VAR:
- printf(" (variable %s )\n", t->value.var->name);
- break;
- default:
- printf("unknown type: %d\n", t->type);
- }
-
- printf("\n");
-}
-
-/*
- PARSER
-*/
-
-static struct _ESExpTerm *
-parse_new_term(int type)
-{
- struct _ESExpTerm *s = g_malloc0(sizeof(*s));
- s->type = type;
- return s;
-}
-
-static void
-parse_term_free(struct _ESExpTerm *t)
-{
- int i;
-
- if (t==NULL) {
- return;
- }
-
- switch (t->type) {
- case ESEXP_TERM_FUNC:
- case ESEXP_TERM_IFUNC:
- for (i=0;i<t->value.func.termcount;i++) {
- parse_term_free(t->value.func.terms[i]);
- }
- g_free(t->value.func.terms);
- break;
- case ESEXP_TERM_VAR:
- break;
- case ESEXP_TERM_STRING:
- g_free(t->value.string);
- break;
- case ESEXP_TERM_INT:
- break;
- default:
- printf("parse_term_free: unknown type: %d\n", t->type);
- }
- g_free(t);
-}
-
-static struct _ESExpTerm **
-parse_values(ESExp *f, int *len)
-{
- int token;
- struct _ESExpTerm **terms;
- int i=0;
- GScanner *gs = f->scanner;
-
- p(printf("parsing values\n"));
-
- /* FIXME: This hardcoded nonsense!!! :) */
- terms = g_malloc0(20*sizeof(*terms));
-
- while ( (token = g_scanner_peek_next_token(gs)) != G_TOKEN_EOF
- && token != ')') {
- terms[i]=parse_value(f);
- i++;
- }
-
- p(printf("found %d subterms\n", i));
- *len = i;
-
- p(printf("dont parsing values\n"));
- return terms;
-}
-
-static struct _ESExpTerm *
-parse_value(ESExp *f)
-{
- int token;
- struct _ESExpTerm *t = NULL;
- GScanner *gs = f->scanner;
- struct _ESExpSymbol *s;
-
- p(printf("parsing value\n"));
-
- token = g_scanner_get_next_token(gs);
- switch(token) {
- case G_TOKEN_LEFT_PAREN:
- p(printf("got brace, its a list!\n"));
- return parse_list(f, TRUE);
- case G_TOKEN_STRING:
- p(printf("got string\n"));
- t = parse_new_term(ESEXP_TERM_STRING);
- t->value.string = g_strdup(g_scanner_cur_value(gs).v_string);
- break;
- case G_TOKEN_INT:
- t = parse_new_term(ESEXP_TERM_INT);
- t->value.number = g_scanner_cur_value(gs).v_int;
- p(printf("got int\n"));
- break;
- case '#':
- printf("got bool?\n");
- token = g_scanner_get_next_token(gs);
- t = parse_new_term(ESEXP_TERM_BOOL);
- t->value.bool = token=='t';
- break;
- case G_TOKEN_SYMBOL:
- s = g_scanner_cur_value(gs).v_symbol;
- switch (s->type) {
- case ESEXP_TERM_FUNC:
- case ESEXP_TERM_IFUNC:
- /* this is basically invalid, since we can't use function
- pointers, but let the runtime catch it ... */
- t = parse_new_term(s->type);
- t->value.func.sym = s;
- t->value.func.terms = parse_values(f, &t->value.func.termcount);
- break;
- case ESEXP_TERM_VAR:
- t = parse_new_term(s->type);
- t->value.var = s;
- break;
- default:
- printf("Invalid symbol type: %d\n", s->type);
- }
- break;
- case G_TOKEN_IDENTIFIER:
- printf("Unknown identifier encountered: %s\n", g_scanner_cur_value(gs).v_identifier);
- break;
- default:
- printf("Innvalid token trying to parse a list of values\n");
- }
- p(printf("done parsing value\n"));
- return t;
-}
-
-/* FIXME: this needs some robustification */
-static struct _ESExpTerm *
-parse_list(ESExp *f, int gotbrace)
-{
- int token;
- struct _ESExpTerm *t = NULL;
- GScanner *gs = f->scanner;
-
- p(printf("parsing list\n"));
- if (gotbrace)
- token = '(';
- else
- token = g_scanner_get_next_token(gs);
- if (token =='(') {
- token = g_scanner_get_next_token(gs);
- switch(token) {
- case G_TOKEN_SYMBOL: {
- struct _ESExpSymbol *s;
-
- s = g_scanner_cur_value(gs).v_symbol;
- p(printf("got funciton: %s\n", s->name));
- t = parse_new_term(s->type);
- p(printf("created new list %p\n", t));
- /* if we have a variable, find out its base type */
- while (s->type == ESEXP_TERM_VAR) {
- s = ((ESExpTerm *)(s->data))->value.var;
- }
- if (s->type == ESEXP_TERM_FUNC
- || s->type == ESEXP_TERM_IFUNC) {
- t->value.func.sym = s;
- t->value.func.terms = parse_values(f, &t->value.func.termcount);
- } else {
- printf("Error, trying to call variable as function\n");
- }
- break; }
- case G_TOKEN_IDENTIFIER:
- printf("Unknown identifier: %s\n", g_scanner_cur_value(gs).v_identifier);
- break;
- default:
- printf("unknown sequence encountered, type = %d\n", token);
- }
- token = g_scanner_get_next_token(gs);
- if (token != ')') {
- printf("Error, expected ')' not found\n");
- }
- } else {
- printf("Error, list term without opening (\n");
- }
-
- p(printf("returning list %p\n", t));
- return t;
-}
-
-#if 0
-GList *
-camel_mbox_folder_search_by_expression(CamelFolder *folder, char *expression, CamelException *ex)
-{
- GScanner *gs;
- int i;
- struct _ESExpTerm *t;
- struct _searchcontext *ctx;
- struct _ESExpResult *r;
- GList *matches = NULL;
-
- gs = g_scanner_new(&scanner_config);
- for(i=0;i<sizeof(symbols)/sizeof(symbols[0]);i++)
- g_scanner_scope_add_symbol(gs, 0, symbols[i].name, &symbols[i]);
-
- g_scanner_input_text(gs, expression, strlen(expression));
- t = parse_list(gs, 0);
-
- if (t) {
- ctx = g_malloc0(sizeof(*ctx));
- ctx->folder = folder;
- ctx->summary = camel_folder_get_summary(folder, ex);
- ctx->message_info = camel_folder_summary_get_message_info_list(ctx->summary);
-#ifdef HAVE_IBEX
- ctx->index = ibex_open(CAMEL_MBOX_FOLDER(folder)->index_file_path, FALSE);
- if (!ctx->index) {
- perror("Cannot open index file, body searches will be ignored\n");
- }
-#endif
- r = term_eval(ctx, t);
-
- /* now create a folder summary to return?? */
- if (r
- && r->type == ESEXP_RES_ARRAY_PTR) {
- d(printf("got result ...\n"));
- for (i=0;i<r->value.ptrarray->len;i++) {
- d(printf("adding match: %s\n", (char *)g_ptr_array_index(r->value.ptrarray, i)));
- matches = g_list_prepend(matches, g_strdup(g_ptr_array_index(r->value.ptrarray, i)));
- }
- e_sexp_result_free(r);
- }
-
- if (ctx->index)
- ibex_close(ctx->index);
-
- gtk_object_unref((GtkObject *)ctx->summary);
- g_free(ctx);
- parse_term_free(t);
- } else {
- printf("Warning, Could not parse expression!\n %s\n", expression);
- }
-
- g_scanner_destroy(gs);
-
- return matches;
-}
-#endif
-
-
-static void e_sexp_finalise(GtkObject *);
-
-static void
-e_sexp_class_init (ESExpClass *class)
-{
- GtkObjectClass *object_class;
-
- object_class = (GtkObjectClass *) class;
-
- object_class->finalize = e_sexp_finalise;
-
- parent_class = gtk_type_class (gtk_object_get_type ());
-}
-
-/* 'builtin' functions */
-static struct {
- char *name;
- ESExpFunc *func;
- int type; /* set to 1 if a function can perform shortcut evaluation, or
- doesn't execute everything, 0 otherwise */
-} symbols[] = {
- { "and", (ESExpFunc *)term_eval_and, 1 },
- { "or", (ESExpFunc *)term_eval_or, 1 },
- { "not", (ESExpFunc *)term_eval_not, 0 },
- { "<", (ESExpFunc *)term_eval_lt, 1 },
- { ">", (ESExpFunc *)term_eval_gt, 1 },
- { "=", (ESExpFunc *)term_eval_eq, 1 },
- { "+", (ESExpFunc *)term_eval_plus, 0 },
- { "-", (ESExpFunc *)term_eval_sub, 0 },
- { "if", (ESExpFunc *)term_eval_if, 1 },
- { "begin", (ESExpFunc *)term_eval_begin, 1 },
-};
-
-static void
-free_symbol(void *key, void *value, void *data)
-{
- struct _ESExpSymbol *s = value;
-
- g_free(s->name);
- g_free(s);
-}
-
-static void
-e_sexp_finalise(GtkObject *o)
-{
- ESExp *s = (ESExp *)o;
-
- if (s->tree) {
- parse_term_free(s->tree);
- s->tree = NULL;
- }
-
- g_scanner_scope_foreach_symbol(s->scanner, 0, free_symbol, 0);
- g_scanner_destroy(s->scanner);
-
- ((GtkObjectClass *)(parent_class))->finalize((GtkObject *)o);
-}
-
-static void
-e_sexp_init (ESExp *s)
-{
- int i;
-
- s->scanner = g_scanner_new(&scanner_config);
-
- /* load in builtin symbols? */
- for(i=0;i<sizeof(symbols)/sizeof(symbols[0]);i++) {
- if (symbols[i].type == 1) {
- e_sexp_add_ifunction(s, 0, symbols[i].name, (ESExpIFunc *)symbols[i].func, &symbols[i]);
- } else {
- e_sexp_add_function(s, 0, symbols[i].name, symbols[i].func, &symbols[i]);
- }
- }
-}
-
-guint
-e_sexp_get_type (void)
-{
- static guint type = 0;
-
- if (!type) {
- GtkTypeInfo type_info = {
- "ESExp",
- sizeof (ESExp),
- sizeof (ESExpClass),
- (GtkClassInitFunc) e_sexp_class_init,
- (GtkObjectInitFunc) e_sexp_init,
- (GtkArgSetFunc) NULL,
- (GtkArgGetFunc) NULL
- };
-
- type = gtk_type_unique (gtk_object_get_type (), &type_info);
- }
-
- return type;
-}
-
-ESExp *
-e_sexp_new (void)
-{
- ESExp *f = E_SEXP ( gtk_type_new (e_sexp_get_type ()));
-
- return f;
-}
-
-void
-e_sexp_add_function(ESExp *f, int scope, char *name, ESExpFunc *func, void *data)
-{
- struct _ESExpSymbol *s;
-
- g_return_if_fail(FILTER_IS_SEXP(f));
- g_return_if_fail(name != NULL);
-
- s = g_malloc0(sizeof(*s));
- s->name = g_strdup(name);
- s->f.func = func;
- s->type = ESEXP_TERM_FUNC;
- s->data = data;
- g_scanner_scope_add_symbol(f->scanner, scope, s->name, s);
-}
-
-void
-e_sexp_add_ifunction(ESExp *f, int scope, char *name, ESExpIFunc *ifunc, void *data)
-{
- struct _ESExpSymbol *s;
-
- g_return_if_fail(FILTER_IS_SEXP(f));
- g_return_if_fail(name != NULL);
-
- s = g_malloc0(sizeof(*s));
- s->name = g_strdup(name);
- s->f.ifunc = ifunc;
- s->type = ESEXP_TERM_IFUNC;
- s->data = data;
- g_scanner_scope_add_symbol(f->scanner, scope, s->name, s);
-}
-
-void
-e_sexp_add_variable(ESExp *f, int scope, char *name, ESExpTerm *value)
-{
- struct _ESExpSymbol *s;
-
- g_return_if_fail(FILTER_IS_SEXP(f));
- g_return_if_fail(name != NULL);
-
- s = g_malloc0(sizeof(*s));
- s->name = g_strdup(name);
- s->type = ESEXP_TERM_VAR;
- s->data = value;
- g_scanner_scope_add_symbol(f->scanner, scope, s->name, s);
-}
-
-void
-e_sexp_remove_symbol(ESExp *f, int scope, char *name)
-{
- int oldscope;
- struct _ESExpSymbol *s;
-
- g_return_if_fail(FILTER_IS_SEXP(f));
- g_return_if_fail(name != NULL);
-
- oldscope = g_scanner_set_scope(f->scanner, scope);
- s = g_scanner_lookup_symbol(f->scanner, name);
- g_scanner_scope_remove_symbol(f->scanner, scope, name);
- g_scanner_set_scope(f->scanner, oldscope);
- if (s) {
- g_free(s->name);
- g_free(s);
- }
-}
-
-int
-e_sexp_set_scope(ESExp *f, int scope)
-{
- g_return_val_if_fail(FILTER_IS_SEXP(f), 0);
-
- return g_scanner_set_scope(f->scanner, scope);
-}
-
-void
-e_sexp_input_text(ESExp *f, const char *text, int len)
-{
- g_return_if_fail(FILTER_IS_SEXP(f));
- g_return_if_fail(text != NULL);
-
- g_scanner_input_text(f->scanner, text, len);
-}
-
-void
-e_sexp_input_file (ESExp *f, int fd)
-{
- g_return_if_fail(FILTER_IS_SEXP(f));
-
- g_scanner_input_file(f->scanner, fd);
-}
-
-/* needs some error return? */
-void
-e_sexp_parse(ESExp *f)
-{
- g_return_if_fail(FILTER_IS_SEXP(f));
-
- if (f->tree)
- parse_term_free(f->tree);
-
- f->tree = parse_list(f, FALSE);
-
- if (f->tree)
- parse_dump_term(f->tree, 0);
-}
-
-struct _ESExpResult *
-e_sexp_eval(ESExp *f)
-{
- g_return_val_if_fail(FILTER_IS_SEXP(f), NULL);
- g_return_val_if_fail(f->tree != NULL, NULL);
-
- return e_sexp_term_eval(f, f->tree);
-}
-
-#ifdef TESTER
-int main(int argc, char **argv)
-{
- ESExp *f;
- char *t = "(+ \"foo\" \"\\\"\" \"bar\" \"\\\\ blah \\x \")";
- ESExpResult *r;
-
- gtk_init(&argc, &argv);
-
- f = e_sexp_new();
-
- e_sexp_add_variable(f, 0, "test", NULL);
-
- e_sexp_input_text(f, t, strlen(t));
- e_sexp_parse(f);
-
- if (f->tree) {
- parse_dump_term(f->tree, 0);
- }
-
- r = e_sexp_eval(f);
- if (r) {
- eval_dump_result(r, 0);
- } else {
- printf("no result?|\n");
- }
-
- return 0;
-}
-#endif