clear the input buffer before reading from stdin again

add an input prompt to interactive mode

README.md

@@ -16,7 +16,7 @@
 
 Where:
 
-- `i`: Enable interactive mode. If set any api commands passed will be ignored.
+- `i`: Enable interactive mode. If set, any api commands passed on the command line will be ignored.
 - `k`: The kind of Voicemeeter (basic, banana or potato). Use this to launch the GUI.
 - `D`: Set log level 0=TRACE, 1=DEBUG, 2=INFO, 3=WARN, 4=ERROR, 5=FATAL
 
@@ -36,6 +36,21 @@ Launch banana GUI, set log level to DEBUG, set Strip 0 label to podmic then prin
 
 `./vmrcli.exe -kbanana -D1 strip[0].label=podmic strip[2].label`
 
+## `Interactive Mode`
+
+Running the following command in Powershell:
+
+`./vmrcli.exe -i`
+
+Will open an interactive prompt:
+
+```powershell
+Interactive mode enabled. Enter 'Q' to exit.
+>>
+```
+
+API commands follow the same rules as listed above. Entering `Q` or `q` will exit the program.
+
 ## `Script files`
 
 Scripts can be loaded from text files, for example in Powershell:
@@ -44,6 +59,14 @@ Scripts can be loaded from text files, for example in Powershell:
 ./vmrcli.exe -D1 $(Get-Content .\example_commands.txt)
 ```
 
+## `Build`
+
+Run the included `makefile` to build with [GNU Make](https://www.gnu.org/software/make/).
+
+By default the log.c module is built with coloured logging enabled. To disable this you can override the `LOG_USE_COLOR` variable, for example:
+
+`make LOG_USE_COLOR=no`
+
 ## `Official Documentation`
 
 - [Voicemeeter Remote C API](https://github.com/onyx-and-iris/Voicemeeter-SDK/blob/main/VoicemeeterRemoteAPI.pdf)

include/util.h

@@ -0,0 +1,6 @@
+#ifndef __UTIL_H__
+#define __UTIL_H__
+
+void replace_multiple_space_with_one(char *s, size_t len);
+
+#endif /* __UTIL_H__ */

makefile

@@ -9,7 +9,12 @@ EXE := $(BIN_DIR)/$(program).exe
 SRC := $(wildcard $(SRC_DIR)/*.c)
 OBJ := $(SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
 
+LOG_USE_COLOR ?= yes
+ifeq ($(LOG_USE_COLOR), yes)
+	CPPFLAGS := -Iinclude -MMD -MP -DLOG_USE_COLOR
+else
 	CPPFLAGS := -Iinclude -MMD -MP
+endif
 CFLAGS = -O -Wall -W -pedantic -ansi -std=c99
 LDFLAGS  := -Llib
 LDLIBS   := -lm
@@ -28,7 +33,6 @@ $(BIN_DIR) $(OBJ_DIR):
 	pwsh -Command New-Item -Path $@ -ItemType Directory
 
 clean:
-	pwsh -Command Remove-Item -Recurse $(EXE)
-	pwsh -Command Remove-Item -Recurse $(OBJ_DIR)
+	pwsh -Command Remove-Item -Recurse $(EXE), $(OBJ_DIR)
 
 -include $(OBJ:.o=.d)

src/util.c

@@ -0,0 +1,35 @@
+#include <stddef.h>
+
+void replace_multiple_space_with_one(char *s, size_t len)
+{
+    int j = 0;
+    int count = 0;
+
+    if (len == 1 && (s[0] == ' ' || s[0] == '\t'))
+    {
+        s[0] = '\0';
+        return;
+    }
+
+    if (len < 2)
+        return;
+
+    for (int i = 0; s[i] != '\0'; i++)
+    {
+        if (s[i] == ' ' || s[i] == '\t')
+        {
+            count++;
+        }
+
+        if (s[i] != ' ' && s[i] != '\t')
+        {
+            if (count >= 1)
+            {
+                count = 0;
+                s[j++] = ' ';
+            }
+            s[j++] = s[i];
+        }
+    }
+    s[j] = '\0';
+}

src/vmr.c

@@ -4,16 +4,15 @@
 #include "vmr.h"
 #include "log.h"
 
-long login(T_VBVMR_INTERFACE *iVMR, int kind)
+long login(T_VBVMR_INTERFACE *vmr, int kind)
 {
     int rep;
     long v;
 
-    rep = iVMR->VBVMR_Login();
-    Sleep(20);
+    rep = vmr->VBVMR_Login();
     if (rep == 1)
     {
-        run_voicemeeter(iVMR, kind);
+        run_voicemeeter(vmr, kind);
         switch (kind)
         {
         case BASIC:
@@ -34,16 +33,16 @@ long login(T_VBVMR_INTERFACE *iVMR, int kind)
         int timeout = 2;
 
         endwait = time(NULL) + timeout;
-        while (time(NULL) < endwait)
+        do
         {
-            if ((rep = version(iVMR, &v)) == 0)
+            if ((rep = version(vmr, &v)) == 0)
                 break;
-            Sleep(20);
-        }
+            Sleep(50);
+        } while (time(NULL) < endwait);
     }
     if (rep == 0)
     {
-        version(iVMR, &v);
+        version(vmr, &v);
         long v1 = (v & 0xFF000000) >> 24,
              v2 = (v & 0x00FF0000) >> 16,
              v3 = (v & 0x0000FF00) >> 8,
@@ -51,93 +50,94 @@ long login(T_VBVMR_INTERFACE *iVMR, int kind)
         char version_s[128];
         sprintf(version_s, "%i.%i.%i.%i", (int)v1, (int)v2, (int)v3, (int)v4);
         log_info("Successfully logged into the Voicemeeter API v%s", version_s);
-        clear_dirty(iVMR);
+        clear_dirty(vmr);
     }
     return rep;
 }
 
-long logout(T_VBVMR_INTERFACE *iVMR)
+long logout(T_VBVMR_INTERFACE *vmr)
 {
     int rep;
 
     Sleep(20); /* give time for last command */
-    rep = iVMR->VBVMR_Logout();
+    rep = vmr->VBVMR_Logout();
     if (rep == 0)
         log_info("Successfully logged out of the Voicemeeter API");
     return rep;
 }
 
-long run_voicemeeter(T_VBVMR_INTERFACE *iVMR, int kind)
+long run_voicemeeter(T_VBVMR_INTERFACE *vmr, int kind)
 {
     log_trace("VBVMR_RunVoicemeeter(%d)", kind);
-    return iVMR->VBVMR_RunVoicemeeter((long)kind);
+    return vmr->VBVMR_RunVoicemeeter((long)kind);
 }
 
-long type(T_VBVMR_INTERFACE *iVMR, long *type)
+long type(T_VBVMR_INTERFACE *vmr, long *type)
 {
-    return iVMR->VBVMR_GetVoicemeeterType(type);
+    log_trace("VBVMR_GetVoicemeeterType(<long> *t)");
+    return vmr->VBVMR_GetVoicemeeterType(type);
 }
 
-long version(T_VBVMR_INTERFACE *iVMR, long *version)
+long version(T_VBVMR_INTERFACE *vmr, long *version)
 {
-    log_trace("VBVMR_GetVoicemeeterType(<long> *v)");
-    return iVMR->VBVMR_GetVoicemeeterVersion(version);
+    log_trace("VBVMR_GetVoicemeeterVersion(<long> *v)");
+    return vmr->VBVMR_GetVoicemeeterVersion(version);
 }
 
-bool is_pdirty(T_VBVMR_INTERFACE *iVMR)
+bool is_pdirty(T_VBVMR_INTERFACE *vmr)
 {
     log_trace("VBVMR_IsParametersDirty()");
-    return iVMR->VBVMR_IsParametersDirty() == 1;
+    return vmr->VBVMR_IsParametersDirty() == 1;
 }
 
-long get_parameter_float(T_VBVMR_INTERFACE *iVMR, char *param, float *f)
+long get_parameter_float(T_VBVMR_INTERFACE *vmr, char *param, float *f)
 {
     log_trace("VBVMR_GetParameterFloat(%s, <float> *f)", param, f);
-    return iVMR->VBVMR_GetParameterFloat(param, f);
+    return vmr->VBVMR_GetParameterFloat(param, f);
 }
 
-long get_parameter_string(T_VBVMR_INTERFACE *iVMR, char *param, char *s)
+long get_parameter_string(T_VBVMR_INTERFACE *vmr, char *param, char *s)
 {
     log_trace("VBVMR_GetParameterStringA(%s, <char> *s)", param, s);
-    return iVMR->VBVMR_GetParameterStringA(param, s);
+    return vmr->VBVMR_GetParameterStringA(param, s);
 }
 
-long set_parameter_float(T_VBVMR_INTERFACE *iVMR, char *param, float val)
+long set_parameter_float(T_VBVMR_INTERFACE *vmr, char *param, float val)
 {
-    log_trace("VBVMR_SetParameterFloat(%s, %.2f)", param, val);
-    return iVMR->VBVMR_SetParameterFloat(param, val);
+    log_trace("VBVMR_SetParameterFloat(%s, %.1f)", param, val);
+    return vmr->VBVMR_SetParameterFloat(param, val);
 }
 
-long set_parameter_string(T_VBVMR_INTERFACE *iVMR, char *param, char *s)
+long set_parameter_string(T_VBVMR_INTERFACE *vmr, char *param, char *s)
 {
     log_trace("VBVMR_SetParameterStringA(%s, %s)", param, s);
-    return iVMR->VBVMR_SetParameterStringA(param, s);
+    return vmr->VBVMR_SetParameterStringA(param, s);
 }
 
-long set_parameters(T_VBVMR_INTERFACE *iVMR, char *command)
+long set_parameters(T_VBVMR_INTERFACE *vmr, char *command)
 {
     log_trace("VBVMR_SetParameters(%s)", command);
-    return iVMR->VBVMR_SetParameters(command);
+    return vmr->VBVMR_SetParameters(command);
 }
 
-bool is_mdirty(T_VBVMR_INTERFACE *iVMR)
+bool is_mdirty(T_VBVMR_INTERFACE *vmr)
 {
-    return iVMR->VBVMR_MacroButton_IsDirty() == 1;
+    return vmr->VBVMR_MacroButton_IsDirty() == 1;
 }
 
-long macrobutton_getstatus(T_VBVMR_INTERFACE *iVMR, long n, float *val, long mode)
+long macrobutton_getstatus(T_VBVMR_INTERFACE *vmr, long n, float *val, long mode)
 {
-    return iVMR->VBVMR_MacroButton_GetStatus(n, val, mode);
+    return vmr->VBVMR_MacroButton_GetStatus(n, val, mode);
 }
 
-long macrobutton_setstatus(T_VBVMR_INTERFACE *iVMR, long n, float val, long mode)
+long macrobutton_setstatus(T_VBVMR_INTERFACE *vmr, long n, float val, long mode)
 {
-    return iVMR->VBVMR_MacroButton_SetStatus(n, val, mode);
+    return vmr->VBVMR_MacroButton_SetStatus(n, val, mode);
 }
 
-void clear_dirty(T_VBVMR_INTERFACE *iVMR)
+void clear_dirty(T_VBVMR_INTERFACE *vmr)
 {
     Sleep(30);
-    while (is_pdirty(iVMR))
+    while (is_pdirty(vmr))
         Sleep(1);
 }

src/vmrcli.c

@@ -5,6 +5,7 @@
 #include "cdll.h"
 #include "vmr.h"
 #include "log.h"
+#include "util.h"
 
 #define MAX_LINE 512
 
@@ -29,7 +30,7 @@ int set_kind(char *kval);
 int init_voicemeeter(T_VBVMR_INTERFACE *vmr, int kind);
 void interactive(T_VBVMR_INTERFACE *vmr);
 void parse_command(T_VBVMR_INTERFACE *vmr, char *command);
-struct result *get(T_VBVMR_INTERFACE *vmr, char *command, struct result *res);
+void get(T_VBVMR_INTERFACE *vmr, char *command, struct result *res);
 
 int main(int argc, char *argv[])
 {
@@ -69,10 +70,9 @@ int main(int argc, char *argv[])
             }
             else
             {
-                fputs(
+                log_error(
                     "-D arg out of range, expected value from 0 up to 5\n"
-                    "Log level will default to LOG_WARN (3).\n",
-                    stderr);
+                    "Log level will default to LOG_WARN (3).\n");
             }
             break;
         default:
@@ -138,7 +138,7 @@ int set_kind(char *kval)
     }
     else
     {
-        fprintf(stderr, "Unknown Voicemeeter kind '%s'\n", kval);
+        log_error("Unknown Voicemeeter kind '%s'\n", kval);
         exit(EXIT_FAILURE);
     }
 }
@@ -150,11 +150,11 @@ int init_voicemeeter(T_VBVMR_INTERFACE *vmr, int kind)
     {
         if (rep == -100)
         {
-            fputs("Voicemeeter is not installed", stderr);
+            log_error("Voicemeeter is not installed");
         }
         else
         {
-            fprintf(stderr, "Error loading Voicemeeter dll with code %d\n", rep);
+            log_error("Error loading Voicemeeter dll with code %d\n", rep);
         }
         return rep;
     }
@@ -162,7 +162,7 @@ int init_voicemeeter(T_VBVMR_INTERFACE *vmr, int kind)
     rep = login(vmr, kind);
     if (rep != 0)
     {
-        fputs("Error logging into Voicemeeter", stderr);
+        log_error("Error logging into Voicemeeter");
         return rep;
     }
 
@@ -173,27 +173,41 @@ void interactive(T_VBVMR_INTERFACE *vmr)
 {
     char input[MAX_LINE];
     char *p = input;
+    char command[MAX_LINE];
+    int i;
+    size_t len;
 
+    printf(">> ");
     while (fgets(input, MAX_LINE, stdin) != NULL)
     {
         input[strcspn(input, "\n")] = 0;
-        if (strlen(input) == 1 && (strncmp(input, "Q", 1) == 0 || strncmp(input, "q", 1) == 0))
+        len = strlen(input);
+        if (len == 1 && toupper(input[0]) == 'Q')
             break;
 
+        replace_multiple_space_with_one(input, len);
         while (*p)
         {
-            char command[MAX_LINE];
-            int i = 0;
+            if (isspace(*p))
+            {
+                p++;
+                continue;
+            }
+            i = 0;
+            log_trace("commands still in buffer: %s", p);
 
             while (!isspace(*p))
                 command[i++] = *p++;
             command[i] = '\0';
-            p++; /* shift to next char */
 
+            if (command[0] != '\0')
                 parse_command(vmr, command);
+            memset(command, '\0', sizeof(command));
         }
 
         p = input;                          /* reset pointer */
+        memset(input, '\0', sizeof(input)); /* reset input buffer */
+        printf(">> ");
     }
 }
 
@@ -232,13 +246,12 @@ void parse_command(T_VBVMR_INTERFACE *vmr, char *command)
             puts(res.val.s);
             break;
         default:
-            fputs("Unexpected result type", stderr);
             break;
         }
     }
 }
 
-struct result *get(T_VBVMR_INTERFACE *vmr, char *command, struct result *res)
+void get(T_VBVMR_INTERFACE *vmr, char *command, struct result *res)
 {
     clear_dirty(vmr);
     if (get_parameter_float(vmr, command, &res->val.f) != 0)
@@ -247,9 +260,7 @@ struct result *get(T_VBVMR_INTERFACE *vmr, char *command, struct result *res)
         if (get_parameter_string(vmr, command, res->val.s) != 0)
         {
             res->val.s[0] = 0;
-            fputs("Unknown parameter", stderr);
+            log_error("Unknown parameter '%s'", command);
         }
     }
-
-    return res;
 }