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Adjust the readonly structure pointer types so the pointer itself is not read-only but the thing it points to is; and change the display formatters to use pointers to control, transfer, and calc structures instead of the whole state, with read-only access enforced at compile time (#165).

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Andrew Wood
2025-07-26 22:28:39 +01:00
parent 18548d217b
commit ecc0c0e414
13 changed files with 86 additions and 87 deletions
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src/include/pv-internal.h
+13 -11
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@@ -445,24 +445,26 @@ typedef struct pvtransferstate_s *pvtransferstate_t;
* function declarations where the function definitely shouldn't be altering
* the contents of the structure.
*/
typedef const struct pvprogramstatus_s * const readonly_pvprogramstatus_t;
typedef const struct pvinputfiles_s * const readonly_pvinputfiles_t;
typedef const struct pvcontrol_s * const readonly_pvcontrol_t;
typedef const struct pvsignal_s * const readonly_pvsignal_t;
typedef const struct pvtransientflags_s * const readonly_pvtransientflags_t;
typedef const struct pvdisplay_s * const readonly_pvdisplay_t;
typedef const struct pvdisplay_segment_s * const readonly_pvdisplay_segment_t;
typedef const struct pvtransfercalc_s * const readonly_pvtransfercalc_t;
typedef const struct pvcursorstate_s * const readonly_pvcursorstate_t;
typedef const struct pvtransferstate_s * const readonly_pvtransferstate_t;
typedef const struct pvprogramstatus_s * readonly_pvprogramstatus_t;
typedef const struct pvinputfiles_s * readonly_pvinputfiles_t;
typedef const struct pvcontrol_s * readonly_pvcontrol_t;
typedef const struct pvsignal_s * readonly_pvsignal_t;
typedef const struct pvtransientflags_s * readonly_pvtransientflags_t;
typedef const struct pvdisplay_s * readonly_pvdisplay_t;
typedef const struct pvdisplay_segment_s * readonly_pvdisplay_segment_t;
typedef const struct pvtransfercalc_s * readonly_pvtransfercalc_t;
typedef const struct pvcursorstate_s * readonly_pvcursorstate_t;
typedef const struct pvtransferstate_s * readonly_pvtransferstate_t;
/*
* Structure containing the parameters used by formatters.
*/
struct pvformatter_args_s {
/*@dependent@*/ pvstate_t state; /* overall state */
/*@dependent@*/ pvdisplay_t display; /* the display being updated */
/*@dependent@*/ pvdisplay_segment_t segment; /* the segment of the display */
/*@dependent@*/ readonly_pvcontrol_t control; /* program control settings */
/*@dependent@*/ readonly_pvtransferstate_t transfer; /* transfer state */
/*@dependent@*/ readonly_pvtransfercalc_t calc; /* calculated transfer state */
/*@dependent@*/ char *buffer; /* buffer to write formatted segments into */
pvdisplay_bytecount_t buffer_size; /* size of the buffer */
pvdisplay_bytecount_t offset; /* current write position in the buffer */