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https://github.com/eledio-devices/thirdparty-littlefs.git
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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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* Simple config parser
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*
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* Copyright (c) 2017 Christopher Haster
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* Distributed under the MIT license
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*/
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#ifndef LFS_CFG_H
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#define LFS_CFG_H
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#include <stddef.h>
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#include <stdbool.h>
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#include <unistd.h>
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// This is a simple parser for config files
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//
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// The cfg file format is dumb simple. Attributes are
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// key value pairs separated by a single colon. Delimited
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// by comments (#) and newlines (\r\n) and trims
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// whitespace ( \t\v\f)
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//
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// Here's an example file
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// # Here is a dump example
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// looky: it's_an_attribute
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// hey_look: another_attribute
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//
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// huh: yeah_that's_basically_it # basically it
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// Internal config structure
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typedef struct lfs_cfg {
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size_t len;
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size_t size;
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size_t blen;
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size_t bsize;
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char *buf;
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struct lfs_cfg_attr {
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unsigned key;
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unsigned val;
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} *attrs;
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} lfs_cfg_t;
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// Creates a cfg object and reads in the cfg file from the filename
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//
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// If the lfs_cfg_read fails, returns a negative value from the underlying
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// stdio functions
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int lfs_cfg_create(lfs_cfg_t *cfg, const char *filename);
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// Destroys the cfg object and frees any used memory
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void lfs_cfg_destroy(lfs_cfg_t *cfg);
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// Checks if a cfg attribute exists
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bool lfs_cfg_has(lfs_cfg_t *cfg, const char *key);
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// Retrieves a cfg attribute as a null-terminated string
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//
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// If the attribute does not exist, returns the string passed as def
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const char *lfs_cfg_get(lfs_cfg_t *cfg, const char *key, const char *def);
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// Retrieves a cfg attribute parsed as an int
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//
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// If the attribute does not exist or can't be parsed, returns the
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// integer passed as def
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ssize_t lfs_cfg_geti(lfs_cfg_t *cfg, const char *name, ssize_t def);
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// Retrieves a cfg attribute parsed as an unsigned int
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//
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// If the attribute does not exist or can't be parsed, returns the
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// integer passed as def
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size_t lfs_cfg_getu(lfs_cfg_t *cfg, const char *name, size_t def);
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#endif
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