X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_stream.c;h=c40756ddf1997d573435fd7f11b734b38d8aa49d;hb=7bc3560a92635b5dcf7eb9e7329992fc935a1ce2;hp=de8855a8e031c33c4307191b98224cf39adbf547;hpb=8130dbe98eae620bb2d2e23e30425cae8d6f0ec6;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_stream.c b/isl_stream.c
index de8855a..c40756d 100644
--- a/isl_stream.c
+++ b/isl_stream.c
@@ -1,7 +1,7 @@
 /*
  * Copyright 2008-2009 Katholieke Universiteit Leuven
  *
- * Use of this software is governed by the GNU LGPLv2.1 license
+ * Use of this software is governed by the MIT license
  *
  * Written by Sven Verdoolaege, K.U.Leuven, Departement
  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
@@ -11,7 +11,10 @@
 #include <string.h>
 #include <strings.h>
 #include <isl/ctx.h>
-#include <isl/stream.h>
+#include <isl_stream_private.h>
+#include <isl/map.h>
+#include <isl/aff.h>
+#include <isl_val_private.h>
 
 struct isl_keyword {
 	char			*name;
@@ -64,7 +67,7 @@ enum isl_token_type isl_stream_register_keyword(struct isl_stream *s,
 	return keyword->type;
 }
 
-static struct isl_token *isl_token_new(struct isl_ctx *ctx,
+struct isl_token *isl_token_new(isl_ctx *ctx,
 	int line, int col, unsigned on_new_line)
 {
 	struct isl_token *tok = isl_alloc_type(ctx, struct isl_token);
@@ -78,12 +81,49 @@ static struct isl_token *isl_token_new(struct isl_ctx *ctx,
 	return tok;
 }
 
+/* Return the type of "tok".
+ */
+int isl_token_get_type(struct isl_token *tok)
+{
+	return tok ? tok->type : ISL_TOKEN_ERROR;
+}
+
+/* Given a token of type ISL_TOKEN_VALUE, return the value it represents.
+ */
+__isl_give isl_val *isl_token_get_val(isl_ctx *ctx, struct isl_token *tok)
+{
+	if (!tok)
+		return NULL;
+	if (tok->type != ISL_TOKEN_VALUE)
+		isl_die(ctx, isl_error_invalid, "not a value token",
+			return NULL);
+
+	return isl_val_int_from_isl_int(ctx, tok->u.v);
+}
+
+/* Given a token of type ISL_TOKEN_STRING, return the string it represents.
+ */
+__isl_give char *isl_token_get_str(isl_ctx *ctx, struct isl_token *tok)
+{
+	if (!tok)
+		return NULL;
+	if (tok->type != ISL_TOKEN_STRING)
+		isl_die(ctx, isl_error_invalid, "not a string token",
+			return NULL);
+
+	return strdup(tok->u.s);
+}
+
 void isl_token_free(struct isl_token *tok)
 {
 	if (!tok)
 		return;
 	if (tok->type == ISL_TOKEN_VALUE)
 		isl_int_clear(tok->u.v);
+	else if (tok->type == ISL_TOKEN_MAP)
+		isl_map_free(tok->u.map);
+	else if (tok->type == ISL_TOKEN_AFF)
+		isl_pw_aff_free(tok->u.pwaff);
 	else
 		free(tok->u.s);
 	free(tok);
@@ -105,6 +145,20 @@ void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg)
 			fprintf(stderr, "got value '");
 			isl_int_print(stderr, tok->u.v, 0);
 			fprintf(stderr, "'\n");
+		} else if (tok->type == ISL_TOKEN_MAP) {
+			isl_printer *p;
+			fprintf(stderr, "got map '");
+			p = isl_printer_to_file(s->ctx, stderr);
+			p = isl_printer_print_map(p, tok->u.map);
+			isl_printer_free(p);
+			fprintf(stderr, "'\n");
+		} else if (tok->type == ISL_TOKEN_AFF) {
+			isl_printer *p;
+			fprintf(stderr, "got affine expression '");
+			p = isl_printer_to_file(s->ctx, stderr);
+			p = isl_printer_print_pw_aff(p, tok->u.pwaff);
+			isl_printer_free(p);
+			fprintf(stderr, "'\n");
 		} else if (tok->u.s)
 			fprintf(stderr, "got token '%s'\n", tok->u.s);
 		else
@@ -127,6 +181,7 @@ static struct isl_stream* isl_stream_new(struct isl_ctx *ctx)
 	s->col = 0;
 	s->eof = 0;
 	s->c = -1;
+	s->n_un = 0;
 	for (i = 0; i < 5; ++i)
 		s->tokens[i] = NULL;
 	s->n_token = 0;
@@ -152,18 +207,23 @@ struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file)
 
 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str)
 {
-	struct isl_stream *s = isl_stream_new(ctx);
+	struct isl_stream *s;
+	if (!str)
+		return NULL;
+	s = isl_stream_new(ctx);
 	if (!s)
 		return NULL;
 	s->str = str;
 	return s;
 }
 
-static int isl_stream_getc(struct isl_stream *s)
+static int stream_getc(struct isl_stream *s)
 {
 	int c;
 	if (s->eof)
 		return -1;
+	if (s->n_un)
+		return s->c = s->un[--s->n_un];
 	if (s->file)
 		c = fgetc(s->file);
 	else {
@@ -186,20 +246,36 @@ static int isl_stream_getc(struct isl_stream *s)
 
 static void isl_stream_ungetc(struct isl_stream *s, int c)
 {
-	if (s->file)
-		ungetc(c, s->file);
-	else
-		--s->str;
+	isl_assert(s->ctx, s->n_un < 5, return);
+	s->un[s->n_un++] = c;
 	s->c = -1;
 }
 
+static int isl_stream_getc(struct isl_stream *s)
+{
+	int c;
+
+	do {
+		c = stream_getc(s);
+		if (c != '\\')
+			return c;
+		c = stream_getc(s);
+	} while (c == '\n');
+
+	isl_stream_ungetc(s, c);
+
+	return '\\';
+}
+
 static int isl_stream_push_char(struct isl_stream *s, int c)
 {
 	if (s->len >= s->size) {
+		char *buffer;
 		s->size = (3*s->size)/2;
-		s->buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
-		if (!s->buffer)
+		buffer = isl_realloc_array(s->ctx, s->buffer, char, s->size);
+		if (!buffer)
 			return -1;
+		s->buffer = buffer;
 	}
 	s->buffer[s->len++] = c;
 	return 0;
@@ -231,6 +307,8 @@ static enum isl_token_type check_keywords(struct isl_stream *s)
 		return ISL_TOKEN_INFTY;
 	if (!strcasecmp(s->buffer, "NaN"))
 		return ISL_TOKEN_NAN;
+	if (!strcasecmp(s->buffer, "min"))
+		return ISL_TOKEN_MIN;
 	if (!strcasecmp(s->buffer, "max"))
 		return ISL_TOKEN_MAX;
 	if (!strcasecmp(s->buffer, "rat"))
@@ -239,6 +317,12 @@ static enum isl_token_type check_keywords(struct isl_stream *s)
 		return ISL_TOKEN_TRUE;
 	if (!strcasecmp(s->buffer, "false"))
 		return ISL_TOKEN_FALSE;
+	if (!strcasecmp(s->buffer, "ceild"))
+		return ISL_TOKEN_CEILD;
+	if (!strcasecmp(s->buffer, "floord"))
+		return ISL_TOKEN_FLOORD;
+	if (!strcasecmp(s->buffer, "mod"))
+		return ISL_TOKEN_MOD;
 
 	if (!s->keywords)
 		return ISL_TOKEN_IDENT;
@@ -303,12 +387,12 @@ static struct isl_token *next_token(struct isl_stream *s, int same_line)
 	if (c == '(' ||
 	    c == ')' ||
 	    c == '+' ||
-	    c == '/' ||
 	    c == '*' ||
 	    c == '%' ||
+	    c == '?' ||
 	    c == '^' ||
-	    c == '=' ||
 	    c == '@' ||
+	    c == '$' ||
 	    c == ',' ||
 	    c == '.' ||
 	    c == ';' ||
@@ -343,6 +427,7 @@ static struct isl_token *next_token(struct isl_stream *s, int same_line)
 		}
 	}
 	if (c == '-' || isdigit(c)) {
+		int minus = c == '-';
 		tok = isl_token_new(s->ctx, line, col, old_line != line);
 		if (!tok)
 			return NULL;
@@ -357,6 +442,15 @@ static struct isl_token *next_token(struct isl_stream *s, int same_line)
 			isl_stream_ungetc(s, c);
 		isl_stream_push_char(s, '\0');
 		isl_int_read(tok->u.v, s->buffer);
+		if (minus && isl_int_is_zero(tok->u.v)) {
+			tok->col++;
+			tok->on_new_line = 0;
+			isl_stream_push_token(s, tok);
+			tok = isl_token_new(s->ctx, line, col, old_line != line);
+			if (!tok)
+				return NULL;
+			tok->type = (enum isl_token_type) '-';
+		}
 		return tok;
 	}
 	if (isalpha(c) || c == '_') {
@@ -398,6 +492,21 @@ static struct isl_token *next_token(struct isl_stream *s, int same_line)
 		tok->u.s = strdup(s->buffer);
 		return tok;
 	}
+	if (c == '=') {
+		int c;
+		tok = isl_token_new(s->ctx, line, col, old_line != line);
+		if (!tok)
+			return NULL;
+		if ((c = isl_stream_getc(s)) == '=') {
+			tok->u.s = strdup("==");
+			tok->type = ISL_TOKEN_EQ_EQ;
+			return tok;
+		}
+		if (c != -1)
+			isl_stream_ungetc(s, c);
+		tok->type = (enum isl_token_type) '=';
+		return tok;
+	}
 	if (c == ':') {
 		int c;
 		tok = isl_token_new(s->ctx, line, col, old_line != line);
@@ -487,12 +596,46 @@ static struct isl_token *next_token(struct isl_stream *s, int same_line)
 			tok->u.s = strdup("||");
 		return tok;
 	}
+	if (c == '/') {
+		tok = isl_token_new(s->ctx, line, col, old_line != line);
+		if (!tok)
+			return NULL;
+		if ((c = isl_stream_getc(s)) != '\\' && c != -1) {
+			tok->type = (enum isl_token_type) '/';
+			isl_stream_ungetc(s, c);
+		} else {
+			tok->u.s = strdup("/\\");
+			tok->type = ISL_TOKEN_AND;
+		}
+		return tok;
+	}
+	if (c == '\\') {
+		tok = isl_token_new(s->ctx, line, col, old_line != line);
+		if (!tok)
+			return NULL;
+		if ((c = isl_stream_getc(s)) != '/' && c != -1) {
+			tok->type = (enum isl_token_type) '\\';
+			isl_stream_ungetc(s, c);
+		} else {
+			tok->u.s = strdup("\\/");
+			tok->type = ISL_TOKEN_OR;
+		}
+		return tok;
+	}
 	if (c == '!') {
 		tok = isl_token_new(s->ctx, line, col, old_line != line);
 		if (!tok)
 			return NULL;
-		tok->type = ISL_TOKEN_NOT;
-		tok->u.s = strdup("!");
+		if ((c = isl_stream_getc(s)) == '=') {
+			tok->u.s = strdup("!=");
+			tok->type = ISL_TOKEN_NE;
+			return tok;
+		} else {
+			tok->type = ISL_TOKEN_NOT;
+			tok->u.s = strdup("!");
+		}
+		if (c != -1)
+			isl_stream_ungetc(s, c);
 		return tok;
 	}