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[cexpr] Add a get_string function to exprtype_t

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This allows for easy (and safe) printing of cexpr values where the type
supports it. Types that don't support printing would be due to being too
complex or possibly write-only (eg, password strings, when strings are
supported directly).
This commit is contained in:
Bill Currie 2022-04-24 15:04:08 +09:00
parent db5b77c838
commit 392e032ce2
3 changed files with 77 additions and 0 deletions
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3
include/QF/cexpr.h
View file

@ -31,6 +31,7 @@
struct exprval_s;
struct exprctx_s;
struct va_ctx_s;
typedef struct binop_s {
int op;
@ -52,6 +53,7 @@ typedef struct unop_s {
typedef struct exprtype_s {
const char *name;
size_t size;
const char *(*get_string) (const struct exprval_s *val, struct va_ctx_s *va_ctx);
binop_t *binops;
unop_t *unops;
void *data;
@ -114,6 +116,7 @@ int cexpr_parse_enum (exprenum_t *enm, const char *str,
binop_t *cexpr_find_cast (exprtype_t *dst_type, exprtype_t *src_type) __attribute__((pure));
exprval_t *cexpr_value (exprtype_t *type, exprctx_t *ctx);
exprval_t *cexpr_value_reference (exprtype_t *type, void *data, exprctx_t *ctx);
const char *cexpr_enum_get_string (const exprval_t *val, struct va_ctx_s *va_ctx) __attribute__((pure));
int cexpr_eval_string (const char *str, exprctx_t *context);
void cexpr_error(exprctx_t *ctx, const char *fmt, ...) __attribute__((format(PRINTF,2,3)));

72
libs/util/cexpr-type.c
View file

@ -28,11 +28,14 @@
# include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "QF/cexpr.h"
#include "QF/cmem.h"
#include "QF/mathlib.h"
#include "QF/plist.h"
#include "QF/sys.h"
#include "QF/va.h"
#include "QF/simd/vec4f.h"
#include "libs/util/cexpr-parse.h"
@ -99,6 +102,12 @@ int_mod (const exprval_t *val1, const exprval_t *val2, exprval_t *result,
*(int *) result->value = c + (mask & b);
}
static const char *
int_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
return va (va_ctx, "%d", *(int *) val->value);
}
binop_t int_binops[] = {
{ SHL, &cexpr_int, &cexpr_int, int_shl },
{ SHR, &cexpr_int, &cexpr_int, int_shr },
@ -128,6 +137,7 @@ exprtype_t cexpr_int = {
.size = sizeof (int),
.binops = int_binops,
.unops = int_unops,
.get_string = int_get_string,
};
BINOP(uint, shl, unsigned, <<)
@ -153,6 +163,12 @@ UNOP(uint, neg, unsigned, -)
UNOP(uint, tnot, unsigned, !)
UNOP(uint, bnot, unsigned, ~)
static const char *
uint_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
return va (va_ctx, "%u", *(unsigned *) val->value);
}
binop_t uint_binops[] = {
{ SHL, &cexpr_uint, &cexpr_uint, uint_shl },
{ SHR, &cexpr_uint, &cexpr_uint, uint_shr },
@ -183,6 +199,7 @@ exprtype_t cexpr_uint = {
.size = sizeof (unsigned),
.binops = uint_binops,
.unops = uint_unops,
.get_string = uint_get_string,
};
BINOP(size_t, shl, unsigned, <<)
@ -221,6 +238,12 @@ UNOP(size_t, neg, unsigned, -)
UNOP(size_t, tnot, unsigned, !)
UNOP(size_t, bnot, unsigned, ~)
static const char *
size_t_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
return va (va_ctx, "%zd", *(size_t *) val->value);
}
binop_t size_t_binops[] = {
{ SHL, &cexpr_size_t, &cexpr_size_t, size_t_shl },
{ SHR, &cexpr_size_t, &cexpr_size_t, size_t_shr },
@ -252,6 +275,7 @@ exprtype_t cexpr_size_t = {
.size = sizeof (size_t),
.binops = size_t_binops,
.unops = size_t_unops,
.get_string = size_t_get_string,
};
BINOP(float, add, float, +)
@ -309,6 +333,12 @@ UNOP(float, pos, float, +)
UNOP(float, neg, float, -)
UNOP(float, tnot, float, !)
static const char *
float_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
return va (va_ctx, "%.9g", *(float *) val->value);
}
binop_t float_binops[] = {
{ '+', &cexpr_float, &cexpr_float, float_add },
{ '-', &cexpr_float, &cexpr_float, float_sub },
@ -337,6 +367,7 @@ exprtype_t cexpr_float = {
.size = sizeof (float),
.binops = float_binops,
.unops = float_unops,
.get_string = float_get_string,
};
BINOP(double, add, double, +)
@ -375,6 +406,12 @@ UNOP(double, pos, double, +)
UNOP(double, neg, double, -)
UNOP(double, tnot, double, !)
static const char *
double_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
return va (va_ctx, "%.17g", *(double *) val->value);
}
binop_t double_binops[] = {
{ '+', &cexpr_double, &cexpr_double, double_add },
{ '-', &cexpr_double, &cexpr_double, double_sub },
@ -401,6 +438,7 @@ exprtype_t cexpr_double = {
.size = sizeof (double),
.binops = double_binops,
.unops = double_unops,
.get_string = double_get_string,
};
BINOP(vector, add, vec4f_t, +)
@ -518,6 +556,13 @@ vector_swizzle (const exprval_t *val1, const exprval_t *val2,
UNOP(vector, pos, vec4f_t, +)
UNOP(vector, neg, vec4f_t, -)
static const char *
vector_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
vec4f_t vec = *(vec4f_t *) val->value;
return va (va_ctx, VEC4F_FMT, VEC4_EXP (vec));
}
static void
vector_tnot (const exprval_t *val, exprval_t *result, exprctx_t *ctx)
{
@ -550,6 +595,7 @@ exprtype_t cexpr_vector = {
.size = sizeof (vec4f_t),
.binops = vector_binops,
.unops = vector_unops,
.get_string = vector_get_string,
};
static void
@ -572,6 +618,13 @@ quaternion_vector_mul (const exprval_t *val1, const exprval_t *val2,
*c = qvmulf (a, b);
}
static const char *
quaternion_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
vec4f_t vec = *(vec4f_t *) val->value;
return va (va_ctx, VEC4F_FMT, VEC4_EXP (vec));
}
binop_t quaternion_binops[] = {
{ '+', &cexpr_quaternion, &cexpr_quaternion, vector_add },
{ '-', &cexpr_quaternion, &cexpr_quaternion, vector_sub },
@ -592,6 +645,7 @@ exprtype_t cexpr_quaternion = {
.size = sizeof (vec4f_t),
.binops = quaternion_binops,
.unops = quaternion_unops,
.get_string = quaternion_get_string,
};
exprtype_t cexpr_exprval = {
@ -743,3 +797,21 @@ cexpr_parse_enum (exprenum_t *enm, const char *str, const exprctx_t *ctx,
context.result = &result;
return cexpr_eval_string (str, &context);
}
VISIBLE const char *
cexpr_enum_get_string (const exprval_t *val, va_ctx_t *va_ctx)
{
exprenum_t *enm = val->type->data;
exprsym_t *symbols = enm->symtab->symbols;
for (exprsym_t *sym = symbols; sym->name; sym++) {
// if there are duplicate values, choose the *later* value
if (sym[1].name
&& memcmp (sym->value, sym[1].value, val->type->size) == 0) {
continue;
}
if (memcmp (sym->value, val->value, val->type->size) == 0) {
return sym->name;
}
}
return "";
}

2
libs/video/renderer/vulkan/vkgen/vkenum.r
View file

@ -95,9 +95,11 @@ skip_value(string name)
if (strip_bit) {
fprintf (output_file, "\t.binops = flag_binops,\n");
fprintf (output_file, "\t.unops = flag_unops,\n");
fprintf (output_file, "\t.get_string = cexpr_flags_get_string,\n");
} else {
fprintf (output_file, "\t.binops = enum_binops,\n");
fprintf (output_file, "\t.unops = 0,\n");
fprintf (output_file, "\t.get_string = cexpr_enum_get_string,\n");
}
fprintf (output_file, "\t.data = &%s_enum,\n", [self name]);
fprintf (output_file, "};\n");