X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/d5c6a2e654422894c528cda52e951739a6b66ae6..49dcbd9216f3513ec11731a41d4b73acaacb5949:/src/commands.c

diff --git a/src/commands.c b/src/commands.c
index faaf607..429ba85 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -23,6 +23,21 @@
 #include "cdecl99.h"
 #include "cdecl.h"
 
+static struct cdecl *do_parse(const char *s, int input_mode)
+{
+	struct cdecl *parse;
+
+	if (input_mode == INPUT_C)
+		parse = cdecl_parse_decl(s);
+	else
+		parse = cdecl_parse_english(s);
+
+	if (!parse)
+		print_error("%s", cdecl_get_error()->str);
+
+	return parse;
+}
+
 /*
  * Format a declaration according to the given function and return a pointer
  * to the formatted string.  The returned pointer remains valid until the
@@ -30,16 +45,18 @@
  *
  * Returns NULL on failure.
  */
-static const char *
-do_format(size_t func(char *, size_t, struct cdecl *), struct cdecl *decl)
+static const char *do_render(struct cdecl *decl, int output_mode)
 {
 	static size_t bufsz;
 	static char *buf;
-
 	size_t rc;
 
 retry:
-	rc = func(buf, bufsz, decl);
+	if (output_mode == OUTPUT_C)
+		rc = cdecl_declare(buf, bufsz, decl);
+	else
+		rc = cdecl_explain(buf, bufsz, decl);
+
 	if (rc >= bufsz) {
 		char *tmp;
 
@@ -57,93 +74,39 @@ retry:
 	return buf;
 }
 
-int run_command_explain(const char *arg)
-{
-	struct cdecl *decl;
-	const char *str;
-	int ret = -1;
-
-	decl = cdecl_parse_decl(arg);
-	if (!decl) {
-		print_error("%s", cdecl_get_error()->str);
-		goto out;
-	}
-
-	for (struct cdecl *i = decl; i; i = i->next) {
-		str = do_format(cdecl_explain, i);
-		if (!str)
-			goto out;
-
-		printf("%s\n", str);
-	}
-
-	ret = 0;
-out:
-	cdecl_free(decl);
-	return ret;
-}
-
-int run_command_simplify(const char *arg)
+/*
+ * Parse the given string as either C or English (based on input_mode),
+ * then print the result as either C or English (based on output_mode).
+ */
+int run_command_cdecl(const char *s, int input_mode, int output_mode)
 {
-	struct cdecl *decl;
-	const char *str;
+	struct cdecl *i, *parse;
 	int ret = -1;
 
-	decl = cdecl_parse_decl(arg);
-	if (!decl) {
-		print_error("%s", cdecl_get_error()->str);
+	if (!(parse = do_parse(s, input_mode)))
 		goto out;
-	}
-
-	for (struct cdecl *i = decl; i; i = i->next) {
-		struct cdecl_declspec *s = i->specifiers;
 
-		if (i != decl) {
-			i->specifiers = NULL;
-			printf(", ");
-		}
-
-		str = do_format(cdecl_declare, i);
-		i->specifiers = s;
+	for (i = parse; i; i = i->next) {
+		const char *str;
+		int no_nl = 0;
 
-		if (!str)
+		if (!(str = do_render(i, output_mode)))
 			goto out;
 
-		printf("%s", str);
-	}
-
-	putchar('\n');
-
-	ret = 0;
-out:
-	cdecl_free(decl);
-	return ret;
-}
-
-int run_command_declare(const char *cmd)
-{
-	struct cdecl *decl;
-	const char *str;
-	int ret = -1;
+		/*
+		 * In C output, only the first declarator needs specifiers
+		 * printed, and only the last declarator needs a newline.
+		 */
+		if (output_mode == OUTPUT_C && i->next) {
+			i->next->specifiers = NULL;
+			no_nl = 1;
+		}
 
-	/* The name of the command is significant here. */
-	decl = cdecl_parse_english(cmd);
-	if (!decl) {
-		print_error("%s", cdecl_get_error()->str);
-		goto out;
+		printf(", %s%s" + 2*!!i->specifiers, str, "\n" + no_nl);
 	}
 
-	/*
-	 * English parses have at most one full declarator, so no loop is
-	 * needed here.
-	 */
-	str = do_format(cdecl_declare, decl);
-	if (!str)
-		goto out;
-
-	printf("%s\n", str);
 	ret = 0;
 out:
-	cdecl_free(decl);
+	cdecl_free(parse);
 	return ret;
 }