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d72b4409ce
This function is guaranteed to never return a negative value. This is important because we use arr[env_parse_switch(...)] in a few places.
23 lines
504 B
C
23 lines
504 B
C
#ifndef UTIL_ENV_H
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#define UTIL_ENV_H
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#include <stdbool.h>
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#include <unistd.h>
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/**
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* Parse a bool from an environment variable.
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*
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* On success, the parsed value is returned. On error, false is returned.
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*/
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bool env_parse_bool(const char *option);
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/**
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* Pick a choice from an environment variable.
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*
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* On success, the choice index is returned. On error, zero is returned.
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*
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* switches is a NULL-terminated array.
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*/
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size_t env_parse_switch(const char *option, const char **switches);
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#endif
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