Add more code

dev/VisualStudio/main.c

@@ -5,10 +5,53 @@
 
 int32_t
 addint_cmd(int32_t argc, char** argv) {
-    printf("ADDINT CMD, args: %d\r\n", argc);
-    for (size_t i = 0; i < argc; ++i) {
-        printf("Arg %d: %s\r\n", (int)i, argv[i]);
+    long long i1, i2;
+    if (argc < 3) {
+        return -1;
     }
+    i1 = lwshell_parse_long_long(argv[1]);
+    i2 = lwshell_parse_long_long(argv[2]);
+
+    printf("%lld\r\n", i1 + i2);
+    return 0;
+}
+
+int32_t
+subint_cmd(int32_t argc, char** argv) {
+    long long i1, i2;
+    if (argc < 3) {
+        return -1;
+    }
+    i1 = lwshell_parse_long_long(argv[1]);
+    i2 = lwshell_parse_long_long(argv[2]);
+
+    printf("%lld\r\n", i1 - i2);
+    return 0;
+}
+
+int32_t
+adddbl_cmd(int32_t argc, char** argv) {
+    double i1, i2;
+    if (argc < 3) {
+        return -1;
+    }
+    i1 = lwshell_parse_double(argv[1]);
+    i2 = lwshell_parse_double(argv[2]);
+
+    printf("%f\r\n", (i1 + i2));
+    return 0;
+}
+
+int32_t
+subdbl_cmd(int32_t argc, char** argv) {
+    double i1, i2;
+    if (argc < 3) {
+        return -1;
+    }
+    i1 = lwshell_parse_double(argv[1]);
+    i2 = lwshell_parse_double(argv[2]);
+
+    printf("%f\r\n", (i1 - i2));
     return 0;
 }
 
@@ -22,7 +65,10 @@ main(int argc, char** argv) {
     printf("\r\n");
 
     lwshell_init();
-    lwshell_register_cmd("addint", addint_cmd, "Adds int between 2 arguments");
+    lwshell_register_cmd("addint", addint_cmd, "Adds 2 integer numbers and prints them");
+    lwshell_register_cmd("subint", subint_cmd, "Substitute 2 integer numbers and prints them");
+    lwshell_register_cmd("adddbl", adddbl_cmd, "Adds 2 double numbers and prints them");
+    lwshell_register_cmd("subdbl", subdbl_cmd, "Substitute 2 double numbers and prints them");
 
     /* User input to process every character */
     printf("Start entering your text and press enter...\r\n");

lwshell/src/include/lwshell/lwshell.h

@@ -35,6 +35,7 @@
 #define LWSHELL_HDR_H
 
 #include <stdint.h>
+#include <stdlib.h>
 #include "lwshell/lwshell_opt.h"
 
 #ifdef __cplusplus
@@ -82,6 +83,34 @@ lwshellr_t  lwshell_init(void);
 lwshellr_t  lwshell_register_cmd(const char* cmd_name, lwshell_cmd_fn cmd_fn, const char* desc);
 lwshellr_t  lwshell_input(const void* in_data, size_t len);
 
+/**
+ * \brief           Parse input string as `integer`
+ * \param[in]       str: String to parse
+ * \return          String parsed as integer
+ */
+#define lwshell_parse_int(str)              atoi(str)
+
+/**
+ * \brief           Parse input string as `double`
+ * \param[in]       str: String to parse
+ * \return          String parsed as `double`
+ */
+#define lwshell_parse_double(str)           atof(str)
+
+/**
+ * \brief           Parse input string as `long`
+ * \param[in]       str: String to parse
+ * \return          String parsed as `long`
+ */
+#define lwshell_parse_long(str)             atol(str)
+
+/**
+ * \brief           Parse input string as `long long`
+ * \param[in]       str: String to parse
+ * \return          String parsed as `long long`
+ */
+#define lwshell_parse_long_long(str)        atoll(str)
+
 /**
  * \}
  */

lwshell/src/lwshell/lwshell.c

@@ -155,10 +155,23 @@ prv_parse_input(lwshell_t* lw) {
 
         /* Check for command */
         if (lw->argc > 0 && cmds_cnt > 0) {
+            lwshell_cmd_t* c = NULL;
             /* Process all commands */
             for (size_t i = 0; i < cmds_cnt; ++i) {
-                if (strcmp(cmds[i].name, lw->argv[0]) == 0) {
-                    cmds[i].fn(lw->argc, lw->argv);
+                if (strncmp(cmds[i].name, lw->argv[0], strlen(lw->argv[0])) == 0) {
+                    c = &cmds[i];
+                    break;
+                }
+            }
+
+            /* Valid command ready? */
+            if (c != NULL) {
+                if (lw->argc == 2
+                    && lw->argv[1][0] == '-' && lw->argv[1][1] == 'h') {
+                    /* Here we can print version */
+                    printf("%s\r\n", c->desc);
+                } else {
+                    c->fn(lw->argc, lw->argv);
                 }
             }
         }