slave: break out command line tokenizer

meson.build

@@ -73,6 +73,7 @@ executable(
   'shm.c', 'shm.h',
   'slave.c', 'slave.h',
   'terminal.c', 'terminal.h',
+  'tokenize.c', 'tokenize.h',
   'tllist.h',
   'vt.c', 'vt.h',
   wl_proto_src + wl_proto_headers,

slave.c

@@ -11,85 +11,7 @@
 #define LOG_MODULE "slave"
 #define LOG_ENABLE_DBG 0
 #include "log.h"
-
-static bool
-push_argv(char ***argv, size_t *size, char *arg, 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;
-    return true;
-}
-
-static bool
-tokenize_cmdline(char *cmdline, char ***argv)
-{
-    *argv = NULL;
-    size_t argv_size = 0;
-
-    bool first_token_is_quoted = cmdline[0] == '"' || cmdline[0] == '\'';
-    char delim = first_token_is_quoted ? cmdline[0] : ' ';
-
-    char *p = first_token_is_quoted ? &cmdline[1] : &cmdline[0];
-
-    size_t idx = 0;
-    while (*p != '\0') {
-        char *end = strchr(p, delim);
-        if (end == NULL) {
-            if (delim != ' ') {
-                LOG_ERR("unterminated %s quote\n", delim == '"' ? "double" : "single");
-                free(*argv);
-                return false;
-            }
-
-            if (!push_argv(argv, &argv_size, p, &idx) ||
-                !push_argv(argv, &argv_size, NULL, &idx))
-            {
-                goto err;
-            } else
-                return true;
-        }
-
-        *end = '\0';
-
-        if (!push_argv(argv, &argv_size, p, &idx))
-            goto err;
-
-        p = end + 1;
-        while (*p == delim)
-            p++;
-
-        while (*p == ' ')
-            p++;
-
-        if (*p == '"' || *p == '\'') {
-            delim = *p;
-            p++;
-        } else
-            delim = ' ';
-    }
-
-    if (!push_argv(argv, &argv_size, NULL, &idx))
-        goto err;
-
-    return true;
-
-err:
-    free(*argv);
-    return false;
-}
+#include "tokenize.h"
 
 void
 slave_spawn(int ptmx, char *cmd, int err_fd)

tokenize.c

@@ -0,0 +1,87 @@
+#include "tokenize.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#define LOG_MODULE "tokenize"
+#define LOG_ENABLE_DBG 0
+#include "log.h"
+
+static bool
+push_argv(char ***argv, size_t *size, char *arg, 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;
+    return true;
+}
+
+bool
+tokenize_cmdline(char *cmdline, char ***argv)
+{
+    *argv = NULL;
+    size_t argv_size = 0;
+
+    bool first_token_is_quoted = cmdline[0] == '"' || cmdline[0] == '\'';
+    char delim = first_token_is_quoted ? cmdline[0] : ' ';
+
+    char *p = first_token_is_quoted ? &cmdline[1] : &cmdline[0];
+
+    size_t idx = 0;
+    while (*p != '\0') {
+        char *end = strchr(p, delim);
+        if (end == NULL) {
+            if (delim != ' ') {
+                LOG_ERR("unterminated %s quote\n", delim == '"' ? "double" : "single");
+                free(*argv);
+                return false;
+            }
+
+            if (!push_argv(argv, &argv_size, p, &idx) ||
+                !push_argv(argv, &argv_size, NULL, &idx))
+            {
+                goto err;
+            } else
+                return true;
+        }
+
+        *end = '\0';
+
+        if (!push_argv(argv, &argv_size, p, &idx))
+            goto err;
+
+        p = end + 1;
+        while (*p == delim)
+            p++;
+
+        while (*p == ' ')
+            p++;
+
+        if (*p == '"' || *p == '\'') {
+            delim = *p;
+            p++;
+        } else
+            delim = ' ';
+    }
+
+    if (!push_argv(argv, &argv_size, NULL, &idx))
+        goto err;
+
+    return true;
+
+err:
+    free(*argv);
+    return false;
+}

tokenize.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <stdbool.h>
+
+bool tokenize_cmdline(char *cmdline, char ***argv);