edify extensions for OTA package installation, part 2

Adds more edify functions for OTAs:

  is_mounted getprop apply_patch apply_patch_check apply_patch_space
  write_raw_image write_firmware_image package_extract_file

This allows us to install radios, hboots, boot images, and install
incremental OTA packages.

Fixes a couple of dumb bugs in edify itself:

  - we were doubling the size of the function table each time it was
    *not* full, rather than each time it was full

  - "no such function" errors weren't visible to the parser, so they
    didn't prevent execution of the script.

1 files changed, 6 insertions, 4 deletions

diff --git a/edify/parser.y b/edify/parser.y
index 67a210f..cf163c0 100644
--- a/edify/parser.y
+++ b/edify/parser.y
@@ -25,8 +25,8 @@
 extern int gLine;
 extern int gColumn;
 
-void yyerror(Expr** root, const char* s);
-int yyparse(Expr** root);
+void yyerror(Expr** root, int* error_count, const char* s);
+int yyparse(Expr** root, int* error_count);
 
 %}
 
@@ -45,6 +45,7 @@ int yyparse(Expr** root);
 %type <args> arglist
 
 %parse-param {Expr** root}
+%parse-param {int* error_count}
 %error-verbose
 
 /* declarations in increasing order of precedence */
@@ -86,7 +87,7 @@ expr:  STRING {
     if ($$->fn == NULL) {
         char buffer[256];
         snprintf(buffer, sizeof(buffer), "unknown function \"%s\"", $1);
-        yyerror(root, buffer);
+        yyerror(root, error_count, buffer);
         YYERROR;
     }
     $$->name = $1;
@@ -113,9 +114,10 @@ arglist:    /* empty */ {
 
 %%
 
-void yyerror(Expr** root, const char* s) {
+void yyerror(Expr** root, int* error_count, const char* s) {
   if (strlen(s) == 0) {
     s = "syntax error";
   }
   printf("line %d col %d: %s\n", gLine, gColumn, s);
+  ++*error_count;
 }