forked from xuos/xiuos
In debuging
This commit is contained in:
TXuian
parent
bac3958eae
commit
2bdc1245ba
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@ -35,6 +35,12 @@ _boot_start:
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MSR CPACR_EL1, X1
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ISB
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mrs x0, sctlr_el1
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and x0, x0, #~(1 << 0)
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and x0, x0, #~(1 << 2)
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and x0, x0, #~(1 << 12)
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msr sctlr_el1, x0
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// clear some registers
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msr elr_el1, XZR
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@ -45,8 +45,8 @@ ENTRY( _ENTRY )
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ENTRY( _boot_start )
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MEMORY {
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phy_ddr3 (rwx) : ORIGIN = 0x0000000000A00000, LENGTH = 1024M
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vir_ddr3 (rwx) : ORIGIN = 0x0000006041035000, LENGTH = 1024M
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phy_ddr3 (rwx) : ORIGIN = 0x0000000010000000, LENGTH = 1024M
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vir_ddr3 (rwx) : ORIGIN = 0x000000604040D000, LENGTH = 1024M
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}
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@ -58,17 +58,21 @@ SECTIONS
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boot.o(.text)
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bootmmu.o(.text .text.*)
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ns16550.o(.text .text.*)
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boot.o(.rodata .rodata.*)
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bootmmu.o(.rodata .rodata.*)
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ns16550.o(.rodata .rodata.*)
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boot.o(.data .data.*)
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bootmmu.o(.data .data.*)
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ns16550.o(.data .data.*)
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PROVIDE(boot_start_addr = .);
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boot.o(.bss .bss.* COMMON)
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bootmmu.o(.bss .bss.* COMMON)
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ns16550.o(.bss .bss.* COMMON)
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/* stack for booting code. */
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. = ALIGN(0x1000);
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@ -81,7 +85,7 @@ SECTIONS
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PROVIDE(boot_end_addr = .);
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} > phy_ddr3
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.text : AT(0x1035000) {
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.text : AT(0x1040D000) {
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. = ALIGN(0x1000);
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*(.text .text.* .gnu.linkonce.t.*)
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} > vir_ddr3
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@ -33,6 +33,8 @@ Modification:
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#include "pagetable.h"
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#include "registers.h"
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#include "ns16550.h"
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#include <stdint.h>
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#include <string.h>
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@ -69,24 +71,40 @@ uint64_t boot_virt_kern_l3pgdir[NUM_LEVEL3_PDE] __attribute__((aligned(0x1000)))
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uint64_t boot_dev_l4pgdirs[NUM_LEVEL3_PDE][NUM_LEVEL4_PTE] __attribute__((aligned(0x1000))) = { 0 };
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uint64_t boot_kern_l4pgdirs[NUM_LEVEL3_PDE][NUM_LEVEL4_PTE] __attribute__((aligned(0x1000))) = { 0 };
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static inline int cpu_id()
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{
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int x = -1;
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__asm__ volatile("mrs %0, mpidr_el1" : "=r"(x));
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return x & 0x3;
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}
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extern int debug_printf_(const char* format, ...);
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static void build_boot_pgdir()
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{
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uint64_t dev_phy_mem_base = DEV_PHYMEM_BASE;
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debug_printf_("l2 table addr %016x\r\n", boot_l2pgdir);
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debug_printf_("l3 table addr %016x\r\n", boot_dev_l3pgdir);
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debug_printf_("l4 table addr %016x\r\n", boot_dev_l4pgdirs);
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// dev mem
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boot_l2pgdir[(dev_phy_mem_base >> LEVEL2_PDE_SHIFT) & IDX_MASK] = (uint64_t)boot_dev_l3pgdir | L2_TYPE_TAB | L2_PTE_VALID;
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boot_l2pgdir[(MMIO_P2V_WO(dev_phy_mem_base) >> LEVEL2_PDE_SHIFT) & IDX_MASK] = (uint64_t)boot_dev_l3pgdir | L2_TYPE_TAB | L2_PTE_VALID;
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uint64_t cur_mem_paddr = ALIGNDOWN((uint64_t)DEV_PHYMEM_BASE, PAGE_SIZE);
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uint64_t cur_mem_paddr = ALIGNDOWN((uint64_t)DEV_PHYMEM_BASE, LEVEL2_PDE_SIZE);
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for (size_t i = 0; i < NUM_LEVEL3_PDE; i++) {
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// debug_printf_("Loading (%d)(%016x) -> %p\r\n", cpu_id(), &boot_dev_l3pgdir[i], cur_mem_paddr);
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boot_dev_l3pgdir[i] = (uint64_t)boot_dev_l4pgdirs[i] | L3_TYPE_TAB | L3_PTE_VALID;
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for (size_t j = 0; j < NUM_LEVEL4_PTE; j++) {
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// debug_printf_("Loading (%d)%016x -> %p\r\n", cpu_id(), (uintptr_t*)&boot_dev_l4pgdirs[i][j], cur_mem_paddr);
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boot_dev_l4pgdirs[i][j] = cur_mem_paddr | L4_TYPE_PAGE | L4_PTE_DEV | L4_PTE_AF | L4_PTE_XN;
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cur_mem_paddr += PAGE_SIZE;
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}
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}
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// debug_printf_("Dev Table loading done.\n");
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// identical mem
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boot_l2pgdir[(PHY_MEM_BASE >> LEVEL2_PDE_SHIFT) & IDX_MASK] = (uint64_t)boot_kern_l3pgdir | L2_TYPE_TAB | L2_PTE_VALID;
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boot_l2pgdir[(P2V_WO(PHY_MEM_BASE) >> LEVEL2_PDE_SHIFT) & IDX_MASK] = (uint64_t)boot_kern_l3pgdir | L2_TYPE_TAB | L2_PTE_VALID;
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@ -97,6 +115,7 @@ static void build_boot_pgdir()
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for (size_t j = 0; j < NUM_LEVEL4_PTE; j++) {
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boot_kern_l4pgdirs[i][j] = cur_mem_paddr | L4_TYPE_PAGE | L4_PTE_NORMAL | L4_PTE_AF;
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debug_printf_("Loading %p\r\n", cur_mem_paddr);
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cur_mem_paddr += PAGE_SIZE;
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}
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@ -128,7 +147,9 @@ extern void main(void);
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static bool _bss_inited = false;
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void bootmain()
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{
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build_boot_pgdir();
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if (!_bss_inited) {
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build_boot_pgdir();
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}
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load_boot_pgdir();
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__asm__ __volatile__("add sp, sp, %0" ::"r"(KERN_MEM_BASE - PHY_MEM_BASE));
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if (!_bss_inited) {
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@ -34,10 +34,10 @@ Modification:
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#define ARCH_BIT 64
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/* A72 physical memory layout */
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#define PHY_MEM_BASE (0x0000000000A00000ULL)
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#define PHY_USER_FREEMEM_BASE (0x0000000001A00000ULL)
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#define PHY_USER_FREEMEM_TOP (0x0000000001A00000ULL)
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#define PHY_MEM_STOP (0x0000000002000000ULL)
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#define PHY_MEM_BASE (0x0000000010000000ULL)
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#define PHY_USER_FREEMEM_BASE (0x0000000020000000ULL)
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#define PHY_USER_FREEMEM_TOP (0x00000000E0000000ULL)
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#define PHY_MEM_STOP (0x00000000E0000000ULL)
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/* PTE-PAGE_SIZE */
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#define LEVEL4_PTE_SHIFT 12
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@ -61,9 +61,9 @@ Modification:
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#define MAX_NR_FREE_PAGES ((PHY_MEM_STOP - PHY_MEM_BASE) >> LEVEL4_PTE_SHIFT)
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/* Deivce memory layout */
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#define DEV_PHYMEM_BASE (0x00000000C0000000ULL)
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#define DEV_PHYMEM_BASE (0x00000000F0000000ULL)
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#define DEV_VRTMEM_BASE (0x0000004000000000ULL)
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#define DEV_MEM_SZ (0x0000000040000000ULL)
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#define DEV_MEM_SZ (0x0000000010000000ULL)
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/* User memory layout */
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#define USER_STACK_SIZE PAGE_SIZE
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@ -9,7 +9,8 @@
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#include "mmio_access.h"
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#include "ns16550.h"
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#define UART_ADDR MMIO_P2V_WO(0xFE660000)
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// #define UART_ADDR MMIO_P2V_WO(0xFE660000)
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#define UART_ADDR (0xFE660000)
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#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
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#define UART_MCRVAL (UART_MCR_DTR | UART_MCR_RTS) /* RTS/DTR */
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@ -96,3 +97,845 @@ int _debug_uart_getc(void)
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return serial_din(&com_port->rbr);
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}
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// 'ntoa' conversion buffer size, this must be big enough to hold one converted
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// numeric number including padded zeros (dynamically created on stack)
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// default: 32 byte
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#define PRINTF_NTOA_BUFFER_SIZE 32U
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#define PRINTF_FTOA_BUFFER_SIZE 32U
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// support for the floating point type (%f)
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// default: activated
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#define PRINTF_SUPPORT_FLOAT
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// support for exponential floating point notation (%e/%g)
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// default: activated
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#define PRINTF_SUPPORT_EXPONENTIAL
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// define the default floating point precision
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// default: 6 digits
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#define PRINTF_DEFAULT_FLOAT_PRECISION 6U
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// define the largest float suitable to print with %f
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// default: 1e9
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#define PRINTF_MAX_FLOAT 1e9
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// support for the long long types (%llu or %p)
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// default: activated
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#define PRINTF_SUPPORT_LONG_LONG
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// support for the ptrdiff_t type (%t)
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// ptrdiff_t is normally defined in <stddef.h> as long or long long type
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// default: activated
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#define PRINTF_SUPPORT_PTRDIFF_T
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#define _putchar _debug_uart_putc
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///////////////////////////////////////////////////////////////////////////////
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// internal flag definitions
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#define FLAGS_ZEROPAD (1U << 0U)
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#define FLAGS_LEFT (1U << 1U)
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#define FLAGS_PLUS (1U << 2U)
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#define FLAGS_SPACE (1U << 3U)
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#define FLAGS_HASH (1U << 4U)
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#define FLAGS_UPPERCASE (1U << 5U)
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#define FLAGS_CHAR (1U << 6U)
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#define FLAGS_SHORT (1U << 7U)
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#define FLAGS_LONG (1U << 8U)
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#define FLAGS_LONG_LONG (1U << 9U)
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#define FLAGS_PRECISION (1U << 10U)
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#define FLAGS_ADAPT_EXP (1U << 11U)
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// import float.h for DBL_MAX
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#if defined(PRINTF_SUPPORT_FLOAT)
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#include <float.h>
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#endif
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// output function type
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typedef void (*out_fct_type)(char character, void* buffer, size_t idx, size_t maxlen);
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// wrapper (used as buffer) for output function type
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typedef struct {
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void (*fct)(char character, void* arg);
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void* arg;
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} out_fct_wrap_type;
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// internal buffer output
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static inline void _out_buffer(char character, void* buffer, size_t idx, size_t maxlen)
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{
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if (idx < maxlen) {
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((char*)buffer)[idx] = character;
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}
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}
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// internal null output
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static inline void _out_null(char character, void* buffer, size_t idx, size_t maxlen)
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{
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(void)character;
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(void)buffer;
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(void)idx;
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(void)maxlen;
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}
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// internal _putchar wrapper
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static inline void _out_char(char character, void* buffer, size_t idx, size_t maxlen)
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{
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(void)buffer;
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(void)idx;
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(void)maxlen;
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if (character) {
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_putchar(character);
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}
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}
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// internal output function wrapper
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static inline void _out_fct(char character, void* buffer, size_t idx, size_t maxlen)
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{
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(void)idx;
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(void)maxlen;
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if (character) {
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// buffer is the output fct pointer
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((out_fct_wrap_type*)buffer)->fct(character, ((out_fct_wrap_type*)buffer)->arg);
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}
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}
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// internal secure strlen
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// \return The length of the string (excluding the terminating 0) limited by 'maxsize'
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static inline unsigned int _strnlen_s(const char* str, size_t maxsize)
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{
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const char* s;
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for (s = str; *s && maxsize--; ++s)
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;
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return (unsigned int)(s - str);
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}
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// internal test if char is a digit (0-9)
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// \return true if char is a digit
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static inline bool _is_digit(char ch)
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{
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return (ch >= '0') && (ch <= '9');
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}
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// internal ASCII string to unsigned int conversion
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static unsigned int _atoi(const char** str)
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{
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unsigned int i = 0U;
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while (_is_digit(**str)) {
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i = i * 10U + (unsigned int)(*((*str)++) - '0');
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}
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return i;
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}
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// output the specified string in reverse, taking care of any zero-padding
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static size_t _out_rev(out_fct_type out, char* buffer, size_t idx, size_t maxlen, const char* buf, size_t len, unsigned int width, unsigned int flags)
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{
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const size_t start_idx = idx;
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// pad spaces up to given width
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if (!(flags & FLAGS_LEFT) && !(flags & FLAGS_ZEROPAD)) {
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for (size_t i = len; i < width; i++) {
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out(' ', buffer, idx++, maxlen);
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}
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}
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// reverse string
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while (len) {
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out(buf[--len], buffer, idx++, maxlen);
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}
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// append pad spaces up to given width
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if (flags & FLAGS_LEFT) {
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while (idx - start_idx < width) {
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out(' ', buffer, idx++, maxlen);
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}
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}
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return idx;
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}
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// internal itoa format
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static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t maxlen, char* buf, size_t len, bool negative, unsigned int base, unsigned int prec, unsigned int width, unsigned int flags)
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{
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// pad leading zeros
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if (!(flags & FLAGS_LEFT)) {
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if (width && (flags & FLAGS_ZEROPAD) && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
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width--;
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}
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while ((len < prec) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = '0';
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}
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while ((flags & FLAGS_ZEROPAD) && (len < width) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = '0';
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}
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}
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// handle hash
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if (flags & FLAGS_HASH) {
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if (!(flags & FLAGS_PRECISION) && len && ((len == prec) || (len == width))) {
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len--;
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if (len && (base == 16U)) {
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len--;
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}
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}
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if ((base == 16U) && !(flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = 'x';
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} else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = 'X';
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} else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
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buf[len++] = 'b';
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}
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if (len < PRINTF_NTOA_BUFFER_SIZE) {
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buf[len++] = '0';
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}
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}
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if (len < PRINTF_NTOA_BUFFER_SIZE) {
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if (negative) {
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buf[len++] = '-';
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} else if (flags & FLAGS_PLUS) {
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buf[len++] = '+'; // ignore the space if the '+' exists
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} else if (flags & FLAGS_SPACE) {
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buf[len++] = ' ';
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}
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}
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return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
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}
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// internal itoa for 'long' type
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static size_t _ntoa_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long value, bool negative, unsigned long base, unsigned int prec, unsigned int width, unsigned int flags)
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{
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char buf[PRINTF_NTOA_BUFFER_SIZE];
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size_t len = 0U;
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// no hash for 0 values
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if (!value) {
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flags &= ~FLAGS_HASH;
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}
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// write if precision != 0 and value is != 0
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if (!(flags & FLAGS_PRECISION) || value) {
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do {
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const char digit = (char)(value % base);
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buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
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value /= base;
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} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
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}
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return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
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}
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// internal itoa for 'long long' type
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#if defined(PRINTF_SUPPORT_LONG_LONG)
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static size_t _ntoa_long_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long long value, bool negative, unsigned long long base, unsigned int prec, unsigned int width, unsigned int flags)
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{
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char buf[PRINTF_NTOA_BUFFER_SIZE];
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size_t len = 0U;
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// no hash for 0 values
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if (!value) {
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flags &= ~FLAGS_HASH;
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}
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// write if precision != 0 and value is != 0
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if (!(flags & FLAGS_PRECISION) || value) {
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do {
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const char digit = (char)(value % base);
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buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
|
||||
value /= base;
|
||||
} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
|
||||
}
|
||||
|
||||
return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
|
||||
}
|
||||
#endif // PRINTF_SUPPORT_LONG_LONG
|
||||
|
||||
#if defined(PRINTF_SUPPORT_FLOAT)
|
||||
|
||||
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
|
||||
// forward declaration so that _ftoa can switch to exp notation for values > PRINTF_MAX_FLOAT
|
||||
static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags);
|
||||
#endif
|
||||
|
||||
// internal ftoa for fixed decimal floating point
|
||||
static size_t _ftoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags)
|
||||
{
|
||||
char buf[PRINTF_FTOA_BUFFER_SIZE];
|
||||
size_t len = 0U;
|
||||
double diff = 0.0;
|
||||
|
||||
// powers of 10
|
||||
static const double pow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };
|
||||
|
||||
// test for special values
|
||||
if (value != value)
|
||||
return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags);
|
||||
if (value < -DBL_MAX)
|
||||
return _out_rev(out, buffer, idx, maxlen, "fni-", 4, width, flags);
|
||||
if (value > DBL_MAX)
|
||||
return _out_rev(out, buffer, idx, maxlen, (flags & FLAGS_PLUS) ? "fni+" : "fni", (flags & FLAGS_PLUS) ? 4U : 3U, width, flags);
|
||||
|
||||
// test for very large values
|
||||
// standard printf behavior is to print EVERY whole number digit -- which could be 100s of characters overflowing your buffers == bad
|
||||
if ((value > PRINTF_MAX_FLOAT) || (value < -PRINTF_MAX_FLOAT)) {
|
||||
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
|
||||
return _etoa(out, buffer, idx, maxlen, value, prec, width, flags);
|
||||
#else
|
||||
return 0U;
|
||||
#endif
|
||||
}
|
||||
|
||||
// test for negative
|
||||
bool negative = false;
|
||||
if (value < 0) {
|
||||
negative = true;
|
||||
value = 0 - value;
|
||||
}
|
||||
|
||||
// set default precision, if not set explicitly
|
||||
if (!(flags & FLAGS_PRECISION)) {
|
||||
prec = PRINTF_DEFAULT_FLOAT_PRECISION;
|
||||
}
|
||||
// limit precision to 9, cause a prec >= 10 can lead to overflow errors
|
||||
while ((len < PRINTF_FTOA_BUFFER_SIZE) && (prec > 9U)) {
|
||||
buf[len++] = '0';
|
||||
prec--;
|
||||
}
|
||||
|
||||
int whole = (int)value;
|
||||
double tmp = (value - whole) * pow10[prec];
|
||||
unsigned long frac = (unsigned long)tmp;
|
||||
diff = tmp - frac;
|
||||
|
||||
if (diff > 0.5) {
|
||||
++frac;
|
||||
// handle rollover, e.g. case 0.99 with prec 1 is 1.0
|
||||
if (frac >= pow10[prec]) {
|
||||
frac = 0;
|
||||
++whole;
|
||||
}
|
||||
} else if (diff < 0.5) {
|
||||
} else if ((frac == 0U) || (frac & 1U)) {
|
||||
// if halfway, round up if odd OR if last digit is 0
|
||||
++frac;
|
||||
}
|
||||
|
||||
if (prec == 0U) {
|
||||
diff = value - (double)whole;
|
||||
if ((!(diff < 0.5) || (diff > 0.5)) && (whole & 1)) {
|
||||
// exactly 0.5 and ODD, then round up
|
||||
// 1.5 -> 2, but 2.5 -> 2
|
||||
++whole;
|
||||
}
|
||||
} else {
|
||||
unsigned int count = prec;
|
||||
// now do fractional part, as an unsigned number
|
||||
while (len < PRINTF_FTOA_BUFFER_SIZE) {
|
||||
--count;
|
||||
buf[len++] = (char)(48U + (frac % 10U));
|
||||
if (!(frac /= 10U)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
// add extra 0s
|
||||
while ((len < PRINTF_FTOA_BUFFER_SIZE) && (count-- > 0U)) {
|
||||
buf[len++] = '0';
|
||||
}
|
||||
if (len < PRINTF_FTOA_BUFFER_SIZE) {
|
||||
// add decimal
|
||||
buf[len++] = '.';
|
||||
}
|
||||
}
|
||||
|
||||
// do whole part, number is reversed
|
||||
while (len < PRINTF_FTOA_BUFFER_SIZE) {
|
||||
buf[len++] = (char)(48 + (whole % 10));
|
||||
if (!(whole /= 10)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// pad leading zeros
|
||||
if (!(flags & FLAGS_LEFT) && (flags & FLAGS_ZEROPAD)) {
|
||||
if (width && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
|
||||
width--;
|
||||
}
|
||||
while ((len < width) && (len < PRINTF_FTOA_BUFFER_SIZE)) {
|
||||
buf[len++] = '0';
|
||||
}
|
||||
}
|
||||
|
||||
if (len < PRINTF_FTOA_BUFFER_SIZE) {
|
||||
if (negative) {
|
||||
buf[len++] = '-';
|
||||
} else if (flags & FLAGS_PLUS) {
|
||||
buf[len++] = '+'; // ignore the space if the '+' exists
|
||||
} else if (flags & FLAGS_SPACE) {
|
||||
buf[len++] = ' ';
|
||||
}
|
||||
}
|
||||
|
||||
return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
|
||||
}
|
||||
|
||||
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
|
||||
// internal ftoa variant for exponential floating-point type, contributed by Martijn Jasperse <m.jasperse@gmail.com>
|
||||
static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags)
|
||||
{
|
||||
// check for NaN and special values
|
||||
if ((value != value) || (value > DBL_MAX) || (value < -DBL_MAX)) {
|
||||
return _ftoa(out, buffer, idx, maxlen, value, prec, width, flags);
|
||||
}
|
||||
|
||||
// determine the sign
|
||||
const bool negative = value < 0;
|
||||
if (negative) {
|
||||
value = -value;
|
||||
}
|
||||
|
||||
// default precision
|
||||
if (!(flags & FLAGS_PRECISION)) {
|
||||
prec = PRINTF_DEFAULT_FLOAT_PRECISION;
|
||||
}
|
||||
|
||||
// determine the decimal exponent
|
||||
// based on the algorithm by David Gay (https://www.ampl.com/netlib/fp/dtoa.c)
|
||||
union {
|
||||
uint64_t U;
|
||||
double F;
|
||||
} conv;
|
||||
|
||||
conv.F = value;
|
||||
int exp2 = (int)((conv.U >> 52U) & 0x07FFU) - 1023; // effectively log2
|
||||
conv.U = (conv.U & ((1ULL << 52U) - 1U)) | (1023ULL << 52U); // drop the exponent so conv.F is now in [1,2)
|
||||
// now approximate log10 from the log2 integer part and an expansion of ln around 1.5
|
||||
int expval = (int)(0.1760912590558 + exp2 * 0.301029995663981 + (conv.F - 1.5) * 0.289529654602168);
|
||||
// now we want to compute 10^expval but we want to be sure it won't overflow
|
||||
exp2 = (int)(expval * 3.321928094887362 + 0.5);
|
||||
const double z = expval * 2.302585092994046 - exp2 * 0.6931471805599453;
|
||||
const double z2 = z * z;
|
||||
conv.U = (uint64_t)(exp2 + 1023) << 52U;
|
||||
// compute exp(z) using continued fractions, see https://en.wikipedia.org/wiki/Exponential_function#Continued_fractions_for_ex
|
||||
conv.F *= 1 + 2 * z / (2 - z + (z2 / (6 + (z2 / (10 + z2 / 14)))));
|
||||
// correct for rounding errors
|
||||
if (value < conv.F) {
|
||||
expval--;
|
||||
conv.F /= 10;
|
||||
}
|
||||
|
||||
// the exponent format is "%+03d" and largest value is "307", so set aside 4-5 characters
|
||||
unsigned int minwidth = ((expval < 100) && (expval > -100)) ? 4U : 5U;
|
||||
|
||||
// in "%g" mode, "prec" is the number of *significant figures* not decimals
|
||||
if (flags & FLAGS_ADAPT_EXP) {
|
||||
// do we want to fall-back to "%f" mode?
|
||||
if ((value >= 1e-4) && (value < 1e6)) {
|
||||
if ((int)prec > expval) {
|
||||
prec = (unsigned)((int)prec - expval - 1);
|
||||
} else {
|
||||
prec = 0;
|
||||
}
|
||||
flags |= FLAGS_PRECISION; // make sure _ftoa respects precision
|
||||
// no characters in exponent
|
||||
minwidth = 0U;
|
||||
expval = 0;
|
||||
} else {
|
||||
// we use one sigfig for the whole part
|
||||
if ((prec > 0) && (flags & FLAGS_PRECISION)) {
|
||||
--prec;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// will everything fit?
|
||||
unsigned int fwidth = width;
|
||||
if (width > minwidth) {
|
||||
// we didn't fall-back so subtract the characters required for the exponent
|
||||
fwidth -= minwidth;
|
||||
} else {
|
||||
// not enough characters, so go back to default sizing
|
||||
fwidth = 0U;
|
||||
}
|
||||
if ((flags & FLAGS_LEFT) && minwidth) {
|
||||
// if we're padding on the right, DON'T pad the floating part
|
||||
fwidth = 0U;
|
||||
}
|
||||
|
||||
// rescale the float value
|
||||
if (expval) {
|
||||
value /= conv.F;
|
||||
}
|
||||
|
||||
// output the floating part
|
||||
const size_t start_idx = idx;
|
||||
idx = _ftoa(out, buffer, idx, maxlen, negative ? -value : value, prec, fwidth, flags & ~FLAGS_ADAPT_EXP);
|
||||
|
||||
// output the exponent part
|
||||
if (minwidth) {
|
||||
// output the exponential symbol
|
||||
out((flags & FLAGS_UPPERCASE) ? 'E' : 'e', buffer, idx++, maxlen);
|
||||
// output the exponent value
|
||||
idx = _ntoa_long(out, buffer, idx, maxlen, (expval < 0) ? -expval : expval, expval < 0, 10, 0, minwidth - 1, FLAGS_ZEROPAD | FLAGS_PLUS);
|
||||
// might need to right-pad spaces
|
||||
if (flags & FLAGS_LEFT) {
|
||||
while (idx - start_idx < width)
|
||||
out(' ', buffer, idx++, maxlen);
|
||||
}
|
||||
}
|
||||
return idx;
|
||||
}
|
||||
#endif // PRINTF_SUPPORT_EXPONENTIAL
|
||||
#endif // PRINTF_SUPPORT_FLOAT
|
||||
|
||||
// internal vsnprintf
|
||||
static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const char* format, va_list va)
|
||||
{
|
||||
unsigned int flags, width, precision, n;
|
||||
size_t idx = 0U;
|
||||
|
||||
if (!buffer) {
|
||||
// use null output function
|
||||
out = _out_null;
|
||||
}
|
||||
|
||||
while (*format) {
|
||||
// format specifier? %[flags][width][.precision][length]
|
||||
if (*format != '%') {
|
||||
// no
|
||||
out(*format, buffer, idx++, maxlen);
|
||||
format++;
|
||||
continue;
|
||||
} else {
|
||||
// yes, evaluate it
|
||||
format++;
|
||||
}
|
||||
|
||||
// evaluate flags
|
||||
flags = 0U;
|
||||
do {
|
||||
switch (*format) {
|
||||
case '0':
|
||||
flags |= FLAGS_ZEROPAD;
|
||||
format++;
|
||||
n = 1U;
|
||||
break;
|
||||
case '-':
|
||||
flags |= FLAGS_LEFT;
|
||||
format++;
|
||||
n = 1U;
|
||||
break;
|
||||
case '+':
|
||||
flags |= FLAGS_PLUS;
|
||||
format++;
|
||||
n = 1U;
|
||||
break;
|
||||
case ' ':
|
||||
flags |= FLAGS_SPACE;
|
||||
format++;
|
||||
n = 1U;
|
||||
break;
|
||||
case '#':
|
||||
flags |= FLAGS_HASH;
|
||||
format++;
|
||||
n = 1U;
|
||||
break;
|
||||
default:
|
||||
n = 0U;
|
||||
break;
|
||||
}
|
||||
} while (n);
|
||||
|
||||
// evaluate width field
|
||||
width = 0U;
|
||||
if (_is_digit(*format)) {
|
||||
width = _atoi(&format);
|
||||
} else if (*format == '*') {
|
||||
const int w = va_arg(va, int);
|
||||
if (w < 0) {
|
||||
flags |= FLAGS_LEFT; // reverse padding
|
||||
width = (unsigned int)-w;
|
||||
} else {
|
||||
width = (unsigned int)w;
|
||||
}
|
||||
format++;
|
||||
}
|
||||
|
||||
// evaluate precision field
|
||||
precision = 0U;
|
||||
if (*format == '.') {
|
||||
flags |= FLAGS_PRECISION;
|
||||
format++;
|
||||
if (_is_digit(*format)) {
|
||||
precision = _atoi(&format);
|
||||
} else if (*format == '*') {
|
||||
const int prec = (int)va_arg(va, int);
|
||||
precision = prec > 0 ? (unsigned int)prec : 0U;
|
||||
format++;
|
||||
}
|
||||
}
|
||||
|
||||
// evaluate length field
|
||||
switch (*format) {
|
||||
case 'l':
|
||||
flags |= FLAGS_LONG;
|
||||
format++;
|
||||
if (*format == 'l') {
|
||||
flags |= FLAGS_LONG_LONG;
|
||||
format++;
|
||||
}
|
||||
break;
|
||||
case 'h':
|
||||
flags |= FLAGS_SHORT;
|
||||
format++;
|
||||
if (*format == 'h') {
|
||||
flags |= FLAGS_CHAR;
|
||||
format++;
|
||||
}
|
||||
break;
|
||||
#if defined(PRINTF_SUPPORT_PTRDIFF_T)
|
||||
case 't':
|
||||
flags |= (sizeof(ptrdiff_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
|
||||
format++;
|
||||
break;
|
||||
#endif
|
||||
case 'j':
|
||||
flags |= (sizeof(intmax_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
|
||||
format++;
|
||||
break;
|
||||
case 'z':
|
||||
flags |= (sizeof(size_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
|
||||
format++;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
// evaluate specifier
|
||||
switch (*format) {
|
||||
case 'd':
|
||||
case 'i':
|
||||
case 'u':
|
||||
case 'x':
|
||||
case 'X':
|
||||
case 'o':
|
||||
case 'b': {
|
||||
// set the base
|
||||
unsigned int base;
|
||||
if (*format == 'x' || *format == 'X') {
|
||||
base = 16U;
|
||||
} else if (*format == 'o') {
|
||||
base = 8U;
|
||||
} else if (*format == 'b') {
|
||||
base = 2U;
|
||||
} else {
|
||||
base = 10U;
|
||||
flags &= ~FLAGS_HASH; // no hash for dec format
|
||||
}
|
||||
// uppercase
|
||||
if (*format == 'X') {
|
||||
flags |= FLAGS_UPPERCASE;
|
||||
}
|
||||
|
||||
// no plus or space flag for u, x, X, o, b
|
||||
if ((*format != 'i') && (*format != 'd')) {
|
||||
flags &= ~(FLAGS_PLUS | FLAGS_SPACE);
|
||||
}
|
||||
|
||||
// ignore '0' flag when precision is given
|
||||
if (flags & FLAGS_PRECISION) {
|
||||
flags &= ~FLAGS_ZEROPAD;
|
||||
}
|
||||
|
||||
// convert the integer
|
||||
if ((*format == 'i') || (*format == 'd')) {
|
||||
// signed
|
||||
if (flags & FLAGS_LONG_LONG) {
|
||||
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
||||
const long long value = va_arg(va, long long);
|
||||
idx = _ntoa_long_long(out, buffer, idx, maxlen, (unsigned long long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
|
||||
#endif
|
||||
} else if (flags & FLAGS_LONG) {
|
||||
const long value = va_arg(va, long);
|
||||
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
|
||||
} else {
|
||||
const int value = (flags & FLAGS_CHAR) ? (char)va_arg(va, int) : (flags & FLAGS_SHORT) ? (short int)va_arg(va, int)
|
||||
: va_arg(va, int);
|
||||
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned int)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
|
||||
}
|
||||
} else {
|
||||
// unsigned
|
||||
if (flags & FLAGS_LONG_LONG) {
|
||||
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
||||
idx = _ntoa_long_long(out, buffer, idx, maxlen, va_arg(va, unsigned long long), false, base, precision, width, flags);
|
||||
#endif
|
||||
} else if (flags & FLAGS_LONG) {
|
||||
idx = _ntoa_long(out, buffer, idx, maxlen, va_arg(va, unsigned long), false, base, precision, width, flags);
|
||||
} else {
|
||||
const unsigned int value = (flags & FLAGS_CHAR) ? (unsigned char)va_arg(va, unsigned int) : (flags & FLAGS_SHORT) ? (unsigned short int)va_arg(va, unsigned int)
|
||||
: va_arg(va, unsigned int);
|
||||
idx = _ntoa_long(out, buffer, idx, maxlen, value, false, base, precision, width, flags);
|
||||
}
|
||||
}
|
||||
format++;
|
||||
break;
|
||||
}
|
||||
#if defined(PRINTF_SUPPORT_FLOAT)
|
||||
case 'f':
|
||||
case 'F':
|
||||
if (*format == 'F')
|
||||
flags |= FLAGS_UPPERCASE;
|
||||
idx = _ftoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
|
||||
format++;
|
||||
break;
|
||||
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
|
||||
case 'e':
|
||||
case 'E':
|
||||
case 'g':
|
||||
case 'G':
|
||||
if ((*format == 'g') || (*format == 'G'))
|
||||
flags |= FLAGS_ADAPT_EXP;
|
||||
if ((*format == 'E') || (*format == 'G'))
|
||||
flags |= FLAGS_UPPERCASE;
|
||||
idx = _etoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
|
||||
format++;
|
||||
break;
|
||||
#endif // PRINTF_SUPPORT_EXPONENTIAL
|
||||
#endif // PRINTF_SUPPORT_FLOAT
|
||||
case 'c': {
|
||||
unsigned int l = 1U;
|
||||
// pre padding
|
||||
if (!(flags & FLAGS_LEFT)) {
|
||||
while (l++ < width) {
|
||||
out(' ', buffer, idx++, maxlen);
|
||||
}
|
||||
}
|
||||
// char output
|
||||
out((char)va_arg(va, int), buffer, idx++, maxlen);
|
||||
// post padding
|
||||
if (flags & FLAGS_LEFT) {
|
||||
while (l++ < width) {
|
||||
out(' ', buffer, idx++, maxlen);
|
||||
}
|
||||
}
|
||||
format++;
|
||||
break;
|
||||
}
|
||||
|
||||
case 's': {
|
||||
const char* p = va_arg(va, char*);
|
||||
unsigned int l = _strnlen_s(p, precision ? precision : (size_t)-1);
|
||||
// pre padding
|
||||
if (flags & FLAGS_PRECISION) {
|
||||
l = (l < precision ? l : precision);
|
||||
}
|
||||
if (!(flags & FLAGS_LEFT)) {
|
||||
while (l++ < width) {
|
||||
out(' ', buffer, idx++, maxlen);
|
||||
}
|
||||
}
|
||||
// string output
|
||||
while ((*p != 0) && (!(flags & FLAGS_PRECISION) || precision--)) {
|
||||
out(*(p++), buffer, idx++, maxlen);
|
||||
}
|
||||
// post padding
|
||||
if (flags & FLAGS_LEFT) {
|
||||
while (l++ < width) {
|
||||
out(' ', buffer, idx++, maxlen);
|
||||
}
|
||||
}
|
||||
format++;
|
||||
break;
|
||||
}
|
||||
|
||||
case 'p': {
|
||||
width = sizeof(void*) * 2U;
|
||||
flags |= FLAGS_ZEROPAD | FLAGS_UPPERCASE;
|
||||
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
||||
const bool is_ll = sizeof(uintptr_t) == sizeof(long long);
|
||||
if (is_ll) {
|
||||
idx = _ntoa_long_long(out, buffer, idx, maxlen, (uintptr_t)va_arg(va, void*), false, 16U, precision, width, flags);
|
||||
} else {
|
||||
#endif
|
||||
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)((uintptr_t)va_arg(va, void*)), false, 16U, precision, width, flags);
|
||||
#if defined(PRINTF_SUPPORT_LONG_LONG)
|
||||
}
|
||||
#endif
|
||||
format++;
|
||||
break;
|
||||
}
|
||||
|
||||
case '%':
|
||||
out('%', buffer, idx++, maxlen);
|
||||
format++;
|
||||
break;
|
||||
|
||||
default:
|
||||
out(*format, buffer, idx++, maxlen);
|
||||
format++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// termination
|
||||
out((char)0, buffer, idx < maxlen ? idx : maxlen - 1U, maxlen);
|
||||
|
||||
// return written chars without terminating \0
|
||||
return (int)idx;
|
||||
}
|
||||
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
int debug_printf_(const char* format, ...)
|
||||
{
|
||||
va_list va;
|
||||
va_start(va, format);
|
||||
char buffer[1];
|
||||
const int ret = _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
|
||||
va_end(va);
|
||||
return ret;
|
||||
}
|
||||
|
||||
// static int sprintf_(char* buffer, const char* format, ...)
|
||||
// {
|
||||
// va_list va;
|
||||
// va_start(va, format);
|
||||
// const int ret = _vsnprintf(_out_buffer, buffer, (size_t)-1, format, va);
|
||||
// va_end(va);
|
||||
// return ret;
|
||||
// }
|
||||
|
||||
// static int snprintf_(char* buffer, size_t count, const char* format, ...)
|
||||
// {
|
||||
// va_list va;
|
||||
// va_start(va, format);
|
||||
// const int ret = _vsnprintf(_out_buffer, buffer, count, format, va);
|
||||
// va_end(va);
|
||||
// return ret;
|
||||
// }
|
||||
|
||||
// static int vprintf_(const char* format, va_list va)
|
||||
// {
|
||||
// char buffer[1];
|
||||
// return _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
|
||||
// }
|
||||
|
||||
// static int vsnprintf_(char* buffer, size_t count, const char* format, va_list va)
|
||||
// {
|
||||
// return _vsnprintf(_out_buffer, buffer, count, format, va);
|
||||
// }
|
||||
|
||||
// static int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...)
|
||||
// {
|
||||
// va_list va;
|
||||
// va_start(va, format);
|
||||
// const out_fct_wrap_type out_fct_wrap = { out, arg };
|
||||
// const int ret = _vsnprintf(_out_fct, (char*)(uintptr_t)&out_fct_wrap, (size_t)-1, format, va);
|
||||
// va_end(va);
|
||||
// return ret;
|
||||
// }
|
||||
Loading…
Reference in New Issue