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e035d0c658
The command and config parsers both used a similar stack implementation for handling tokens. This resulted in duplicated code. This commit extracts the common stack implementation (push/get/clear functions for strings and longs) into a new `parser_util` module. This resolves a long standing TODO comment.
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* parser_util.h: utility functions for the config and commands parser
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*
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*/
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#pragma once
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struct stack_entry {
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/* Just a pointer, not dynamically allocated. */
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const char *identifier;
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enum {
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STACK_STR = 0,
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STACK_LONG = 1,
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} type;
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union {
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char *str;
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long num;
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} val;
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};
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struct stack {
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struct stack_entry stack[10];
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};
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/**
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* Pushes a string (identified by 'identifier') on the stack.
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* If a string with the same identifier is already on the stack, the new
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* string will be appended, separated by a comma.
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*
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*/
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void parser_push_string(struct stack *stack, const char *identifier, const char *str);
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/**
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* Pushes a long (identified by 'identifier') on the stack.
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*
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*/
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void parser_push_long(struct stack *stack, const char *identifier, long num);
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/**
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* Returns the string with the given identifier.
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*
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*/
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const char *parser_get_string(const struct stack *stack, const char *identifier);
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/**
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* Returns the long with the given identifier.
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*
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*/
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long parser_get_long(const struct stack *stack, const char *identifier);
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/**
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* Clears the stack.
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*
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*/
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void parser_clear_stack(struct stack *stack);
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