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Create helper functions for pushing file contexts

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* src/variable.h (install_file_context, restore_file_context): Add
declarations for new functions.
* src/variable.c (install_file_context, restore_file_context): Define
the new functions.
(lookup_variable_for_file): Call them.
* src/expand.c (recursively_expand_for_file): Ditto.
(allocated_expand_variable_for_file): Ditto.
(expand_string_for_file): Ditto.
This commit is contained in:
Paul Smith 2023-03-26 17:29:50 -04:00
parent 78c8c44326
commit 23f70b0cb8
3 changed files with 45 additions and 30 deletions
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33
src/expand.c
View File

@ -145,7 +145,7 @@ recursively_expand_for_file (struct variable *v, struct file *file)
char *value;
const floc *this_var;
const floc **saved_varp;
struct variable_set_list *save = 0;
struct variable_set_list *savev = 0;
int set_reading = 0;
/* If we're expanding to put into the environment of a shell function then
@ -198,10 +198,7 @@ recursively_expand_for_file (struct variable *v, struct file *file)
}
if (file)
{
save = current_variable_set_list;
current_variable_set_list = file->variables;
}
install_file_context (file, &savev, NULL);
v->expanding = 1;
if (v->append)
@ -214,7 +211,7 @@ recursively_expand_for_file (struct variable *v, struct file *file)
reading_file = 0;
if (file)
current_variable_set_list = save;
restore_file_context (savev, NULL);
expanding_var = saved_varp;
@ -297,19 +294,11 @@ allocated_expand_variable_for_file (const char *name, size_t length, struct file
if (!file)
return allocated_expand_variable (name, length);
savev = current_variable_set_list;
current_variable_set_list = file->variables;
savef = reading_file;
if (file->cmds && file->cmds->fileinfo.filenm)
reading_file = &file->cmds->fileinfo;
else
reading_file = NULL;
install_file_context (file, &savev, &savef);
result = allocated_expand_variable (name, length);
current_variable_set_list = savev;
reading_file = savef;
restore_file_context (savev, savef);
return result;
}
@ -585,19 +574,11 @@ expand_string_for_file (const char *string, struct file *file)
if (!file)
return expand_string (string);
savev = current_variable_set_list;
current_variable_set_list = file->variables;
savef = reading_file;
if (file->cmds && file->cmds->fileinfo.filenm)
reading_file = &file->cmds->fileinfo;
else
reading_file = NULL;
install_file_context (file, &savev, &savef);
result = expand_string (string);
current_variable_set_list = savev;
reading_file = savef;
restore_file_context (savev, savef);
return result;
}

40
src/variable.c
View File

@ -552,12 +552,11 @@ lookup_variable_for_file (const char *name, size_t length, struct file *file)
if (file == NULL)
return lookup_variable (name, length);
savev = current_variable_set_list;
current_variable_set_list = file->variables;
install_file_context (file, &savev, NULL);
var = lookup_variable (name, length);
current_variable_set_list = savev;
restore_file_context (savev, NULL);
return var;
}
@ -733,7 +732,7 @@ push_new_variable_scope (void)
global_setlist.next = current_variable_set_list;
current_variable_set_list = &global_setlist;
}
return (current_variable_set_list);
return current_variable_set_list;
}
void
@ -770,6 +769,39 @@ pop_variable_scope (void)
hash_free (&set->table, 1);
free (set);
}
/* Install a new global context for FILE so that errors/warnings are shown
in that context. Sets OLDLIST to the previous list, and if not NULL sets
OLDFLOC to reading_file and changes reading_file to the current FILE.
Use restore_file_context() to undo this. */
void
install_file_context (struct file *file, struct variable_set_list **oldlist, const floc **oldfloc)
{
*oldlist = current_variable_set_list;
current_variable_set_list = file->variables;
if (oldfloc)
{
*oldfloc = reading_file;
if (file->cmds && file->cmds->fileinfo.filenm)
reading_file = &file->cmds->fileinfo;
else
reading_file = NULL;
}
}
/* Restore a saved global context from OLDLIST. If OLDFLOC is not NULL,
set reading_file back to that value. */
void
restore_file_context (struct variable_set_list *oldlist, const floc *oldfloc)
{
current_variable_set_list = oldlist;
if (oldfloc)
reading_file = oldfloc;
}
/* Merge FROM_SET into TO_SET, freeing unused storage in FROM_SET. */

2
src/variable.h
View File

@ -160,6 +160,8 @@ struct variable_set_list *create_new_variable_set (void);
void free_variable_set (struct variable_set_list *);
struct variable_set_list *push_new_variable_scope (void);
void pop_variable_scope (void);
void install_file_context (struct file *file, struct variable_set_list **oldlist, const floc **oldfloc);
void restore_file_context (struct variable_set_list *oldlist, const floc *oldfloc);
void define_automatic_variables (void);
void initialize_file_variables (struct file *file, int reading);
void print_file_variables (const struct file *file);