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Cleanup the C API

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This commit is contained in:
Victor Zverovich
2026-02-21 11:02:43 -08:00
parent 1dc644e021
commit 9e5bb7ef77
2 changed files with 110 additions and 121 deletions
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152
include/fmt/fmt-c.h
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@@ -1,114 +1,112 @@
#ifndef FMT_C_H
#define FMT_C_H
#include <stddef.h>
#ifdef __cplusplus
# define _Bool bool
#endif
// Formatting library for C++ - the C API
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
void fmt_error_unsupported_type_detected(void);
#ifndef FMT_C_H_
#define FMT_C_H_
enum { fmt_c_max_args = 16 };
typedef enum {
fmt_err_exception = -1,
fmt_err_memory = -2,
fmt_err_invalid_arg = -3
} fmt_error;
#include <stdbool.h> // bool
#include <stddef.h> // size_t
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
fmt_int,
fmt_int = 1,
fmt_uint,
fmt_bool = 7,
fmt_char,
fmt_float,
fmt_double,
fmt_long_double,
fmt_string,
fmt_ptr,
fmt_bool,
fmt_char
fmt_cstring,
fmt_pointer = 14
} fmt_type;
typedef struct {
fmt_type type;
union {
long long i64;
unsigned long long u64;
float f32;
double f64;
long double f128;
const char* str;
const void* ptr; // Used for FMT_PTR and custom data
_Bool bool_val;
char char_val;
long long int_value;
unsigned long long uint_value; // Used for FMT_PTR and custom data
bool bool_value;
char char_value;
float float_value;
double double_value;
long double long_double_value;
const char* cstring;
const void* pointer;
} value;
} fmt_arg;
int fmt_vformat(char* buffer, size_t capacity, const char* format_str,
const fmt_arg* args, size_t arg_count);
enum { fmt_error = -1, fmt_error_invalid_arg = -2 };
int fmt_vformat(char* buffer, size_t size, const char* fmt,
const fmt_arg* args, size_t num_args);
static inline fmt_arg fmt_from_int(long long x) {
fmt_arg arg;
arg.type = fmt_int;
arg.value.i64 = x;
arg.value.int_value = x;
return arg;
}
static inline fmt_arg fmt_from_uint(unsigned long long x) {
fmt_arg arg;
arg.type = fmt_uint;
arg.value.u64 = x;
arg.value.uint_value = x;
return arg;
}
static inline fmt_arg fmt_from_float(float x) {
fmt_arg arg;
arg.type = fmt_float;
arg.value.f32 = x;
return arg;
}
static inline fmt_arg fmt_from_double(double x) {
fmt_arg arg;
arg.type = fmt_double;
arg.value.f64 = x;
return arg;
}
static inline fmt_arg fmt_from_long_double(long double x) {
fmt_arg arg;
arg.type = fmt_long_double;
arg.value.f128 = x;
return arg;
}
static inline fmt_arg fmt_from_str(const char* x) {
fmt_arg arg;
arg.type = fmt_string;
arg.value.str = x;
return arg;
}
static inline fmt_arg fmt_from_ptr(const void* x) {
fmt_arg arg;
arg.type = fmt_ptr;
arg.value.ptr = x;
return arg;
}
static inline fmt_arg fmt_from_bool(_Bool x) {
static inline fmt_arg fmt_from_bool(bool x) {
fmt_arg arg;
arg.type = fmt_bool;
arg.value.bool_val = x;
arg.value.bool_value = x;
return arg;
}
static inline fmt_arg fmt_from_char(int x) {
fmt_arg arg;
arg.type = fmt_char;
arg.value.char_val = x;
arg.value.char_value = x;
return arg;
}
static inline fmt_arg fmt_from_float(float x) {
fmt_arg arg;
arg.type = fmt_float;
arg.value.float_value = x;
return arg;
}
static inline fmt_arg fmt_from_double(double x) {
fmt_arg arg;
arg.type = fmt_double;
arg.value.double_value = x;
return arg;
}
static inline fmt_arg fmt_from_long_double(long double x) {
fmt_arg arg;
arg.type = fmt_long_double;
arg.value.long_double_value = x;
return arg;
}
static inline fmt_arg fmt_from_str(const char* x) {
fmt_arg arg;
arg.type = fmt_cstring;
arg.value.cstring = x;
return arg;
}
static inline fmt_arg fmt_from_ptr(const void* x) {
fmt_arg arg;
arg.type = fmt_pointer;
arg.value.pointer = x;
return arg;
}
@@ -118,6 +116,8 @@ static inline fmt_arg fmt_from_char(int x) {
#ifndef __cplusplus
void fmt_unsupported_type(void);
// Require modern MSVC with conformant preprocessor
# if defined(_MSC_VER) && (!defined(_MSVC_TRADITIONAL) || _MSVC_TRADITIONAL)
# error "C API requires MSVC 2019+ with /Zc:preprocessor flag."
@@ -125,8 +125,6 @@ static inline fmt_arg fmt_from_char(int x) {
# define FMT_MAKE_ARG(x) \
_Generic((x), \
_Bool: fmt_from_bool, \
char: fmt_from_char, \
unsigned char: fmt_from_uint, \
short: fmt_from_int, \
unsigned short: fmt_from_uint, \
@@ -136,6 +134,8 @@ static inline fmt_arg fmt_from_char(int x) {
unsigned long: fmt_from_uint, \
long long: fmt_from_int, \
unsigned long long: fmt_from_uint, \
bool: fmt_from_bool, \
char: fmt_from_char, \
float: fmt_from_float, \
double: fmt_from_double, \
long double: fmt_from_long_double, \
@@ -143,7 +143,7 @@ static inline fmt_arg fmt_from_char(int x) {
const char*: fmt_from_str, \
void*: fmt_from_ptr, \
const void*: fmt_from_ptr, \
default: fmt_error_unsupported_type_detected)(x)
default: fmt_unsupported_type)(x)
# define FMT_CAT(a, b) FMT_CAT_(a, b)
# define FMT_CAT_(a, b) a##b
@@ -189,12 +189,12 @@ static inline fmt_arg fmt_from_char(int x) {
# define FMT_MAP(f, ...) \
FMT_CAT(FMT_MAP_, FMT_NARG(__VA_ARGS__))(f, ##__VA_ARGS__)
# define fmt_format(buf, cap, fmt, ...) \
# define fmt_format(buffer, size, fmt, ...) \
fmt_vformat( \
buf, cap, fmt, \
buffer, size, fmt, \
(fmt_arg[]){{fmt_int}, FMT_MAP(FMT_MAKE_ARG, ##__VA_ARGS__)} + 1, \
FMT_NARG(__VA_ARGS__))
#endif // __cplusplus
#endif // FMT_C_H
#endif // FMT_C_H_