1 files changed, 89 insertions, 0 deletions
diff --git a/depipe_strings.c b/depipe_strings.c
new file mode 100644
index 0000000..597ade8
--- /dev/null
+++ b/depipe_strings.c
@@ -0,0 +1,89 @@
+/* depipe_strings.c
+ *
+ * Depipe apps into strings
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <wait.h>
+
+char **depipe_string(const char *, int *);
+
+int main(int argc, char **argv)
+{
+    int count;
+    char *line = "   ls -1      |   wc -l | cut -n1 |      less | rtfm|           bro       ";
+    char **depiped = depipe_string(line, &count);
+
+    int j;
+    for (j = 0; j < count; j++)
+        printf("app %d: %s\n", j+1, depiped[j]);
+
+    free(depiped);
+
+    return 0;
+}
+
+char **depipe_string(const char *line, int *count)
+{
+    char *last = (char *) line;
+    char *curr = NULL;
+
+    int i;
+    int num_apps = 10;
+    int fname = 100;
+    char **piped_apps = (char **) malloc(sizeof(char *) * num_apps);
+    piped_apps[0] = malloc(sizeof(char) * num_apps * fname);
+
+    /* construct m-dimensional array from 1 block of memory */
+    for (i = 1; i < num_apps; i++)
+        piped_apps[i] = piped_apps[0] + (i * fname);
+
+    *count = 0;
+    i = 0;
+    int j = 0;
+    size_t line_delta = 0;
+
+    while ( (curr = strchr(last, '|')) )
+    {
+        /* skip white space */
+        while (last[0] == ' ')
+            last++;
+
+        line_delta = curr - last;
+        strncpy(piped_apps[i], last, line_delta);
+        piped_apps[i][line_delta] = '\0';
+
+        /* delete whitespace at the tail */
+        j = line_delta - 1;
+        while (piped_apps[i][j] == ' ')
+            piped_apps[i][j--] = '\0';
+
+        last = curr + 1;
+        i++;
+    }
+
+    /* copy over last item */
+
+    /* skip white space */
+    while (last[0] == ' ')
+        last++;
+
+    line_delta = line + strlen(line) - (last-1);
+    strncpy(piped_apps[i], last, line_delta);
+    piped_apps[i][line_delta] = '\0';
+
+    /* delete whitespace at the tail */
+    j = strlen(piped_apps[i]) - 1;
+    while (piped_apps[i][j] == ' ')
+        piped_apps[i][j--] = '\0';
+
+    i++;
+
+    *count = i;
+    return piped_apps;
+}
+