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74f740c975
So that the value is clamped to the range [0, 0x7fffffff] and retains the same value, regardless of whether it's interpreted as a signed or unsigned integer. Closes #522
28 lines
801 B
C
28 lines
801 B
C
#pragma once
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#include <limits.h>
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#include <stdint.h>
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#include <stddef.h>
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#include "terminal.h"
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void vt_from_slave(struct terminal *term, const uint8_t *data, size_t len);
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static inline int
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vt_param_get(const struct terminal *term, size_t idx, int default_value)
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{
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/*
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* We zero excess bits in parsed param values. In most cases this will
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* effectively be a no-op; but it prevents negative returns for edge
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* cases involving unusually large values.
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*/
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static_assert(INT_MAX >= 0x7fffffff, "POSIX requires INT_MAX >= 0x7fffffff");
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const unsigned value_mask = 0x7fffffff;
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if (term->vt.params.idx > idx) {
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unsigned value = term->vt.params.v[idx].value & value_mask;
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return value != 0 ? (int)value : default_value;
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}
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return default_value;
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}
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