aboutsummaryrefslogtreecommitdiff
path: root/src/cmd.h
diff options
context:
space:
mode:
authorIan C <ianc@noddybox.co.uk>2016-03-07 15:00:21 +0000
committerIan C <ianc@noddybox.co.uk>2016-03-07 15:00:21 +0000
commit77e8708934c5c792b1435fa11dfe3c0a6f636a8c (patch)
tree8c68ecddaf2c2c0730ba310b8d1b9e0f1bd16132 /src/cmd.h
parent6e9c9c9205d6eec1ff1cfb3fa407c6714854145a (diff)
Updated README and copied latest version in.
Diffstat (limited to 'src/cmd.h')
-rw-r--r--src/cmd.h155
1 files changed, 155 insertions, 0 deletions
diff --git a/src/cmd.h b/src/cmd.h
new file mode 100644
index 0000000..b47b1b2
--- /dev/null
+++ b/src/cmd.h
@@ -0,0 +1,155 @@
+/*
+
+ casm - Simple, portable assembler
+
+ Copyright (C) 2003-2015 Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+
+ -------------------------------------------------------------------------
+
+ Command callback definitions
+
+*/
+
+#ifndef CASM_CMD_H
+#define CASM_CMD_H
+
+/* ---------------------------------------- TYPES
+*/
+
+
+typedef enum
+{
+ CMD_OK,
+ CMD_OK_WARNING,
+ CMD_FAILED,
+ CMD_NOT_KNOWN
+} CommandStatus;
+
+/* Used to implement a command.
+*/
+typedef CommandStatus (*Command)(const char *label, int argc, char *argv[],
+ int quoted[], char *err, size_t errsize);
+
+
+/* ---------------------------------------- HELPER MACROS
+*/
+
+
+/* Check for the precesence of a label. Expects a variable called 'label'
+
+ Args:
+ NONE
+
+ Expects:
+
+ argv - The argv passed to the command handler
+ label - The label passed to the command handler
+ err - The error location passed to the command handler
+ errsize - The size of the error location passed to the command handler
+*/
+#define CMD_LABEL_CHECK \
+do \
+{ \
+ if (!label) \
+ { \
+ snprintf(err, errsize, "%s: missing label", argv[0]); \
+ return CMD_FAILED; \
+ } \
+} while(0)
+
+
+
+/* Check for the arg count being at least a specified number.
+
+ Args:
+ min - The minimum number of arguments to support
+
+ Expects:
+
+ argc - The argc passed to the command handler
+ argv - The argv passed to the command handler
+ err - The error location passed to the command handler
+ errsize - The size of the error location passed to the command handler
+*/
+#define CMD_ARGC_CHECK(min) \
+do \
+{ \
+ if (argc < min) \
+ { \
+ snprintf(err, errsize, "%s: missing argument", argv[0]); \
+ return CMD_FAILED; \
+ } \
+} while(0)
+
+
+
+
+/* Evaluate an expression.
+
+ Args:
+ expr - The expression to evaluate
+ result - The variable to hold the result
+
+ Expects:
+
+ argc - The argc passed to the command handler
+ argv - The argv passed to the command handler
+ err - The error location passed to the command handler
+ errsize - The size of the error location passed to the command handler
+*/
+#define CMD_EXPR(expr, result) \
+do \
+{ \
+ if (!ExprEval(expr, &result)) \
+ { \
+ snprintf(err, errsize, "%s: expression error: %s", \
+ argv[0], ExprError()); \
+ return CMD_FAILED; \
+ } \
+} while(0)
+
+
+
+/* Parse a table using ParseTable()
+
+ Args:
+ str - The string to look for
+ table - The table to parse
+ result - Variable to hold the return from ParseTable()
+
+ Expects:
+
+ argv - The argv passed to the command handler
+ err - The error location passed to the command handler
+ errsize - The size of the error location passed to the command handler
+*/
+#define CMD_TABLE(str, table, result) \
+do \
+{ \
+ if (!(result = ParseTable(str, table))) \
+ { \
+ snprintf(err, errsize, "unknown value: \"%s\"", str); \
+ return CMD_FAILED; \
+ } \
+} while(0)
+
+
+
+#endif
+
+/*
+vim: ai sw=4 ts=8 expandtab
+*/