--- /dev/null
+/* $Id$ */
+
+/* gs/parse.c -- automatic parsing of data structures */
+
+/* Authors: Arnaud Legrand, Martin Quinson */
+
+#include "gs/gs_private.h"
+#include "gs/parse.yy.h"
+
+GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(NDR_parse,NDR);
+
+typedef struct s_type_modifier{
+ short is_unsigned;
+ short is_short;
+ short is_long;
+
+ short is_struct;
+ short is_union;
+ short is_enum;
+
+ short is_ref;
+} type_modifier_t;
+
+extern char *gs_parse_text;
+
+/* prototypes */
+static void parse_type_modifier(type_modifier_t *type_modifier);
+static void print_type_modifier(type_modifier_t type_modifier);
+
+static gras_error_t parse_statement(gras_type_bag_t *p_bag,
+ const char *definition,
+ gras_dynar_t **dynar);
+static gras_type_t * parse_struct(gras_type_bag_t *p_bag,
+ const char *definition);
+static gras_type_t * parse_typedef(gras_type_bag_t *p_bag,
+ const char *definition);
+
+/* local functions */
+static void parse_type_modifier(type_modifier_t *type_modifier) {
+ do {
+ if (gs_parse_tok_num == GS_PARSE_TOKEN_STAR) {
+ DEBUG0("This is a reference");
+ type_modifier->is_ref++;
+
+ } else if (!strcmp(gs_parse_text,"unsigned")) {
+ DEBUG0("This is an unsigned");
+ type_modifier->is_unsigned = 1;
+
+ } else if (!strcmp(gs_parse_text,"short")) {
+ DEBUG0("This is short");
+ type_modifier->is_short = 1;
+
+ } else if (!strcmp(gs_parse_text,"long")) {
+ DEBUG0("This is long");
+ type_modifier->is_long++; /* "long long" needs love */
+
+ } else if (!strcmp(gs_parse_text,"struct")) {
+ DEBUG0("This is a struct");
+ type_modifier->is_struct = 1;
+
+ } else if (!strcmp(gs_parse_text,"union")) {
+ DEBUG0("This is an union");
+ type_modifier->is_union = 1;
+
+ } else if (!strcmp(gs_parse_text,"enum")) {
+ DEBUG0("This is an enum");
+ type_modifier->is_enum = 1;
+
+ } else {
+ break;
+ }
+
+
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+ if((gs_parse_tok_num != GS_PARSE_TOKEN_WORD) &&
+ (gs_parse_tok_num != GS_PARSE_TOKEN_STAR))
+ break;
+ } while(1);
+}
+
+static void print_type_modifier(type_modifier_t tm) {
+ int i;
+
+ if (tm.is_unsigned) printf("(unsigned) ");
+ if (tm.is_short) printf("(short) ");
+ for (i=0 ; i<tm.is_long ; i++) printf("(long) ");
+
+ if(tm.is_struct) printf("(struct) ");
+ if(tm.is_enum) printf("(enum) ");
+ if(tm.is_union) printf("(union) ");
+
+ for (i=0 ; i<tm.is_ref ; i++) printf("(ref) ");
+}
+
+/* FIXME: Missing function. Do not free the dynar... */
+#define gs_type_copy(a) a
+
+static gras_error_t parse_statement(gras_type_bag_t *bag,
+ const char *definition,
+ gras_dynar_t **dynar) {
+ gras_error_t errcode;
+ char buffname[512];
+
+ char *base_type = NULL;
+ type_modifier_t tm;
+
+ gras_type_t *res;
+
+ int starred = 0;
+ int expect_a_colon = 0;
+
+ gras_dynar_reset(*dynar);
+ memset(&tm,0,sizeof(tm));
+
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+ if(gs_parse_tok_num == GS_PARSE_TOKEN_RP) {
+ return mismatch_error; /* end of the englobing structure or union */
+ }
+ DEBUG0("Parse a new statement.");
+
+
+ if(gs_parse_tok_num != GS_PARSE_TOKEN_WORD) {
+ fprintf(stderr,
+ "Unparsable symbol: found a typeless statement (got '%s' instead). Definition was:\n%s\n",
+ gs_parse_text, definition);
+ abort();
+ }
+
+ /**** get the type modifier of this statement ****/
+ parse_type_modifier(&tm);
+
+ /* FIXME: This does not detect recursive definitions at all
+ if (tm.is_union || tm.is_enum || tm.is_struct) {
+ fprintf(stderr,
+ "Cannot handle recursive type definition yet. Definition was:\n%s\n",
+ definition);
+ abort();
+ }*/
+
+ /**** get the base type, giving "short a" the needed love ****/
+ if (!tm.is_union &&
+ !tm.is_enum &&
+ !tm.is_struct &&
+
+ (tm.is_short || tm.is_long || tm.is_unsigned) &&
+
+ strcmp(gs_parse_text,"char") &&
+ strcmp(gs_parse_text,"float") &&
+ strcmp(gs_parse_text,"double") &&
+ strcmp(gs_parse_text,"int") ) {
+
+ /* bastard user, they omited "int" ! */
+ base_type=strdup("int");
+ DEBUG0("the base type is 'int', which were omited");
+ } else {
+ base_type=strdup(gs_parse_text);
+ DEBUG1("the base type is '%s'",base_type);
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+ }
+
+ /**** build the base type for latter use ****/
+ if (tm.is_union) {
+ fprintf(stderr,
+ "Cannot handle union yet (need annotation to get the callback), sorry. Definition was:\n%s\n",
+ definition);
+ abort();
+
+ /* FIXME
+ sprintf(buffname,"union %s",base_type);
+ res = bag->bag_ops->get_type_by_name(bag, NULL, buffname);
+ if (!res) {
+ res = gs_type_new_union(bag,NULL,buffname);
+ }
+ */
+
+ } else if (tm.is_enum) {
+ fprintf(stderr,
+ "Cannot handle enum yet (need grassouillet's love), sorry. Definition was:\n%s\n",
+ definition);
+ abort();
+ /* FIXME
+ sprintf(buffname,"enum %s",base_type);
+ res = bag->bag_ops->get_type_by_name(bag, NULL, bufname);
+ if (!res) {
+ res = gs_type_new_enum(bag,connection,buffname);
+ }
+ */
+
+ } else if (tm.is_struct) {
+ sprintf(buffname,"struct %s",base_type);
+ res = bag->bag_ops->get_type_by_name(bag, NULL, buffname);
+ if (!res) {
+ res = gs_type_new_struct(bag,NULL,buffname);
+ }
+
+ /* Let's code like Alvin ;) */
+#define gs_parse_get_or_create(name,func) \
+ (bag->bag_ops->get_type_by_name(bag, NULL, #name) ? \
+ bag->bag_ops->get_type_by_name(bag, NULL, #name) : \
+ gs_type_new_##func##_elemental(bag, NULL, \
+ #name, sizeof(name)) \
+ )
+
+ } else if (tm.is_unsigned) {
+ if (!strcmp(base_type,"int")) {
+ if (tm.is_long == 2) {
+ res = gs_parse_get_or_create(unsigned long long int,unsigned_integer);
+ } else if (tm.is_long) {
+ res = gs_parse_get_or_create(unsigned long int,unsigned_integer);
+ } else if (tm.is_short) {
+ res = gs_parse_get_or_create(unsigned short int,unsigned_integer);
+ } else {
+ res = gs_parse_get_or_create(unsigned int,unsigned_integer);
+ }
+
+ } else if (!strcmp(base_type, "char")) {
+ res = gs_parse_get_or_create(unsigned char,unsigned_integer);
+
+ } else { /* impossible, gcc parses this shit before us */
+ abort();
+ }
+
+ } else if (!strcmp(base_type, "float")) {
+ /* no modificator allowed by gcc */
+ res = gs_parse_get_or_create(float,floating_point);
+
+ } else { /* signed integer elemental */
+ if (!strcmp(base_type,"int")) {
+ if (tm.is_long == 2) {
+ res = gs_parse_get_or_create(signed long long int,signed_integer);
+ } else if (tm.is_long) {
+ res = gs_parse_get_or_create(signed long int,signed_integer);
+ } else if (tm.is_short) {
+ res = gs_parse_get_or_create(signed short int,signed_integer);
+ } else {
+ res = gs_parse_get_or_create(int,unsigned_integer);
+ }
+
+ } else if (!strcmp(base_type, "char")) {
+ res = gs_parse_get_or_create(char,unsigned_integer);
+
+ } else { /* impossible */
+ abort();
+ }
+
+ }
+
+ if (tm.is_ref) {
+ fprintf(stderr,
+ "Cannot handle references yet (need annotations), sorry. Definition was:\n%s\n",
+ definition);
+ abort();
+ /* Should build ref on the current res (beware of int****) */
+ }
+
+ /**** look for the symbols of this type ****/
+ expect_a_colon = 0;
+ for( /* no initialization */ ;
+
+ ((gs_parse_tok_num != GS_PARSE_TOKEN_EMPTY) &&
+ (gs_parse_tok_num != GS_PARSE_TOKEN_SEMI_COLON)) ;
+
+ gs_parse_tok_num = gs_parse_lex_n_dump() ) {
+
+ if(expect_a_colon) {
+ if(gs_parse_tok_num == GS_PARSE_TOKEN_COLON) {
+ expect_a_colon = 0;
+ continue;
+ } else {
+ fprintf(stderr,
+ "Unparsable symbol: Expected a comma (','), got '%s' instead. Definition was:\n%s\n",
+ gs_parse_text, definition);
+ abort();
+ }
+ } else if(gs_parse_tok_num == GS_PARSE_TOKEN_COLON) {
+ fprintf(stderr,
+ "Unparsable symbol: Unexpected comma (','). Definition was:\n%s\n",
+ definition);
+ abort();
+ }
+
+ if(gs_parse_tok_num == GS_PARSE_TOKEN_STAR) {
+ starred = 1;
+ }
+
+ /* found a symbol name. Build the type and push it to dynar */
+ if(gs_parse_tok_num == GS_PARSE_TOKEN_WORD) {
+ if (starred) {
+ /* FIXME: Build a ref or array on the base type */
+ fprintf(stderr,
+ "Cannot handle references yet (need annotations), sorry. Definition was:\n%s\n",
+ definition);
+ abort();
+ }
+ DEBUG1("Encountered the variable (field?) %s",gs_parse_text);
+
+ TRY(gras_dynar_push(*dynar, &gs_type_copy(base_type)));
+ starred = 0;
+ expect_a_colon = 1;
+ continue;
+ }
+
+ fprintf(stderr,
+ "Unparasable symbol: Maybe a def struct in a def struct or so. The definition was:\n%s\n",
+ definition);
+ abort();
+ }
+
+ DEBUG0("End of this statement");
+ return no_error;
+}
+
+static gras_type_t *parse_struct(gras_type_bag_t *bag,
+ const char *definition) {
+
+ gras_error_t errcode;
+ char buffname[32];
+ static int anonymous_struct=0;
+
+ gras_dynar_t *fields;
+
+ gras_type_t *field;
+ int i;
+
+ gras_type_t *struct_type;
+
+ errcode=gras_dynar_new(&fields,sizeof(gras_type_t*),NULL);
+ if (errcode != no_error)
+ return NULL;
+ /* FIXME: the dynar content leaks because there is no gs_type_free.
+ But that's not a problem because each member are the same element since there is no gs_type_copy ;)
+ */
+
+ /* Create the struct descriptor */
+ if (gs_parse_tok_num == GS_PARSE_TOKEN_WORD) {
+ struct_type = gs_type_new_struct(bag,NULL, gs_parse_text);
+ DEBUG1("Parse the struct '%s'", gs_parse_text);
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+ } else {
+ sprintf(buffname,"anonymous struct %d",anonymous_struct++);
+ DEBUG1("Parse the anonymous struct nb %d", anonymous_struct);
+ struct_type = gs_type_new_struct(bag,NULL,buffname);
+ }
+
+ if (gs_parse_tok_num != GS_PARSE_TOKEN_LP) {
+ fprintf(stderr,
+ "Unparasable symbol: I looked for a struct definition, but got %s instead of '{'. The definition was:\n%s\n",
+ gs_parse_text,definition);
+ abort();
+ }
+
+ /* Parse the fields */
+ for (errcode=parse_statement(bag,definition,&fields);
+ errcode == no_error ;
+ errcode=parse_statement(bag,definition,&fields)) {
+
+ DEBUG1("This statement contained %d fields",gras_dynar_length(fields));
+ gras_dynar_foreach(fields,i, field) {
+ char fname[128];
+ static int field_count=0;
+ sprintf(fname,"%d",field_count++);
+ DEBUG0("Append a field");
+ gs_type_struct_append_field(struct_type,fname,field);
+ }
+ }
+ if (errcode != mismatch_error)
+ return NULL; /* FIXME: LEAK! */
+
+ /* terminates */
+ if (gs_parse_tok_num != GS_PARSE_TOKEN_RP) {
+ fprintf(stderr,
+ "Unparasable symbol: Expected '}' at the end of struct definition, got '%s'. The definition was:\n%s\n",
+ gs_parse_text,definition);
+ abort();
+ }
+
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+
+ gras_dynar_free(fields);
+ return struct_type;
+}
+
+static gras_type_t * parse_typedef(gras_type_bag_t *bag,
+ const char *definition) {
+
+ type_modifier_t tm;
+
+ gras_type_t *struct_desc=NULL;
+ gras_type_t *typedef_desc=NULL;
+
+ memset(&tm,0,sizeof(tm));
+
+ /* get the aliased type */
+ parse_type_modifier(&tm);
+
+ if (tm.is_struct) {
+ struct_desc = parse_struct(bag,definition);
+ }
+
+ parse_type_modifier(&tm);
+
+ if (tm.is_ref) {
+ fprintf(stderr,
+ "Cannot handle reference without annotation. Definition was:\n%s\n",
+ definition);
+ abort();
+ }
+
+ /* get the aliasing name */
+ if (gs_parse_tok_num != GS_PARSE_TOKEN_WORD) {
+ fprintf(stderr,
+ "Unparsable typedef: Expected the alias name, and got '%s'.\n%s\n",
+ gs_parse_text,definition);
+ abort();
+ }
+
+ /* (FIXME: should) build the alias */
+ fprintf(stderr, "Cannot handle typedef yet (need love from grassouillet), sorry. Definition was: \n%s\n",definition);
+ abort();
+
+ // res=gs_type_new_typedef(bag, NULL, strdup(gs_parse_text) );
+
+ return typedef_desc;
+}
+
+/* main function */
+gras_type_t *
+_gs_type_parse(gras_type_bag_t *bag,
+ const char *definition) {
+
+ gras_type_t * res=NULL;
+
+ /* init */
+ DEBUG1("_gs_type_parse(%s)",definition);
+ gs_parse_pointer_string_init(definition);
+
+ /* Do I have a typedef, or a raw struct ?*/
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+
+ if ((gs_parse_tok_num == GS_PARSE_TOKEN_WORD) && (!strcmp(gs_parse_text,"struct"))) {
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+ res = parse_struct(bag,definition);
+
+ } else if ((gs_parse_tok_num == GS_PARSE_TOKEN_WORD) && (!strcmp(gs_parse_text,"typedef"))) {
+ gs_parse_tok_num = gs_parse_lex_n_dump();
+ res = parse_typedef(bag,definition);
+
+ } else {
+ fprintf(stderr,"Failed to parse the following symbol (not a struct neither a typedef) :\n%s\n",definition);
+ abort();
+ }
+
+ gs_parse_pointer_string_close();
+ DEBUG1("end of _gs_type_parse(%s)",definition);
+
+ return res;
+}
+
+
