Diff: util/msopt.c

Revision:

0:e91b984e285d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/msopt.c	Sun Feb 05 03:55:01 2017 +0000
@@ -0,0 +1,122 @@
+/**
+ * @file      msopt.c
+ * @author    Shinichiro Nakamura (CuBeatSystems)
+ * ===============================================================
+ * MicroShell (Version 0.0.1)
+ * Copyright (c) 2016, 2017 Shinichiro Nakamura (CuBeatSystems)
+ * ===============================================================
+ * The MIT License : https://opensource.org/licenses/MIT
+ *
+ * Copyright (c) 2016, 2017 Shinichiro Nakamura (CuBeatSystems)
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "msopt.h"
+
+#define INITCODE            (0x248e97c0)
+#define IS_WHITE_SPACE(C)   (((C) == ' ') || ((C) == '\t') || ((C) == '\r') || ((C) == '\n'))
+
+static char *skip_white_space(char *text)
+{
+    char *p = text;
+    while (IS_WHITE_SPACE(*p)) {
+        if (*p == 0) {
+            break;
+        }
+        p++;
+    }
+    return p;
+}
+
+static char *skip_text_string(char *text, int *length)
+{
+    char *p = text;
+    int count = 0;
+    while (!IS_WHITE_SPACE(*p)) {
+        if (*p == 0) {
+            break;
+        }
+        p++;
+        count++;
+    }
+    *length = count;
+    return p;
+}
+
+MSOPT_RESULT msopt_init(MSOPT *handle, char *text)
+{
+    char *src = text;
+    char *des = handle->argv;
+    while (*src) {
+        *des++ = *src++;
+    }
+    *des = 0;
+    handle->argc = 0;
+    char *p = handle->argv;
+    while (1) {
+        if (handle->argc >= MSCONF_MAX_INPUT_ARGS) {
+            return MSOPT_RESULT_ERROR_TOO_MUCH_ARGUMENTS;
+        }
+        p = skip_white_space(p);
+        if (*p == 0) {
+            break;
+        }
+        handle->info[handle->argc].head = p;
+        p = skip_text_string(p, &(handle->info[handle->argc].length));
+        handle->argc++;
+    }
+    handle->initcode = INITCODE;
+    return MSOPT_RESULT_OK;
+}
+
+MSOPT_RESULT msopt_get_argc(MSOPT *handle, int *argc)
+{
+    if (handle->initcode != INITCODE) {
+        *argc = 0;
+        return MSOPT_RESULT_ERROR_ILLEGAL_OBJECT;
+    }
+    *argc = handle->argc;
+    return MSOPT_RESULT_OK;
+}
+
+MSOPT_RESULT msopt_get_argv(MSOPT *handle, int index, char *bufptr, int bufsiz)
+{
+    *bufptr = 0;
+    if (handle->argc <= index) {
+        return MSOPT_RESULT_ERROR_ILLEGAL_INDEX_NUMBER;
+    }
+    char *src = handle->info[index].head;
+    char *des = bufptr;
+    int i;
+    for (i = 0; i < handle->info[index].length; i++) {
+        if (i >= bufsiz - 1) {
+            *des = 0;
+            return MSOPT_RESULT_ERROR_BUFFER_SIZE;
+        }
+        *des++ = *src++;
+    }
+    *des = 0;
+    return MSOPT_RESULT_OK;
+}
+
+