tabs and tab overview

tokenize.c

@@ -0,0 +1,103 @@
+#include "tokenize.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#define LOG_MODULE "tokenize"
+#define LOG_ENABLE_DBG 0
+#include "log.h"
+#include "xmalloc.h"
+
+static bool
+push_argv(char ***argv, size_t *size, const char *arg, size_t len, size_t *argc)
+{
+    if (arg != NULL && arg[0] == '%')
+        return true;
+
+    if (*argc >= *size) {
+        size_t new_size = *size > 0 ? 2 * *size : 10;
+        char **new_argv = realloc(*argv, new_size * sizeof(new_argv[0]));
+
+        if (new_argv == NULL)
+            return false;
+
+        *argv = new_argv;
+        *size = new_size;
+    }
+
+    (*argv)[(*argc)++] = arg != NULL ? xstrndup(arg, len) : NULL;
+    return true;
+}
+
+bool
+tokenize_cmdline(const char *cmdline, char ***argv)
+{
+    *argv = NULL;
+    size_t argv_size = 0;
+
+    const char *final_end = cmdline + strlen(cmdline) + 1;
+
+    bool first_token_is_quoted = cmdline[0] == '"' || cmdline[0] == '\'';
+    char delim = first_token_is_quoted ? cmdline[0] : ' ';
+
+    const char *p = first_token_is_quoted ? &cmdline[1] : &cmdline[0];
+    const char *search_start = p;
+
+    size_t idx = 0;
+    while (*p != '\0') {
+        char *end = (char *)strchr(search_start, delim);
+        if (end == NULL) {
+            if (delim != ' ') {
+                LOG_ERR("unterminated %s quote", delim == '"' ? "double" : "single");
+                goto err;
+            }
+
+            if (!push_argv(argv, &argv_size, p, final_end - p, &idx) ||
+                !push_argv(argv, &argv_size, NULL, 0, &idx))
+            {
+                goto err;
+            } else
+                return true;
+        }
+
+        if (end > p && *(end - 1) == '\\') {
+            /* Escaped quote, remove one level of escaping and
+             * continue searching for "our" closing quote */
+            memmove(end - 1, end, strlen(end));
+            end[strlen(end) - 1] = '\0';
+            search_start = end;
+            continue;
+        }
+
+        //*end = '\0';
+
+        if (!push_argv(argv, &argv_size, p, end - p, &idx))
+            goto err;
+
+        p = end + 1;
+        while (*p == delim)
+            p++;
+
+        while (*p == ' ')
+            p++;
+
+        if (*p == '"' || *p == '\'') {
+            delim = *p;
+            p++;
+        } else
+            delim = ' ';
+        search_start = p;
+    }
+
+    if (!push_argv(argv, &argv_size, NULL, 0, &idx))
+        goto err;
+
+    return true;
+
+err:
+    for (size_t i = 0; i < idx; i++)
+        free((*argv)[i]);
+    free(*argv);
+    *argv = NULL;
+    return false;
+}