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nobuild.h
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nobuild.h
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#ifndef NOBUILD_H_
#define NOBUILD_H_
#include <stdio.h>
#include <stdarg.h>
#ifndef NOBUILD_PRINTF_FORMAT
# if defined(__GNUC__) || defined(__clang__)
# // https://gcc.gnu.org/onlinedocs/gcc-4.7.2/gcc/Function-Attributes.html
# define NOBUILD_PRINTF_FORMAT(STRING_INDEX, FIRST_TO_CHECK) __attribute__ ((format (printf, STRING_INDEX, FIRST_TO_CHECK)))
# else
# define NOBUILD_PRINTF_FORMAT(STRING_INDEX, FIRST_TO_CHECK)
# endif
#endif
#ifndef NOBUILD__DEPRECATED
# if defined(__GNUC__) || (defined(__clang__) && !defined(_MSC_VER))
# define NOBUILD__DEPRECATED(func) __attribute__ ((deprecated)) func
# elif defined(_MSC_VER)
# define NOBUILD__DEPRECATED(func) __declspec (deprecated) func
# endif
#endif
NOBUILD__DEPRECATED(void VLOG(FILE *stream, const char *tag, const char *fmt, va_list args));
void info(const char *fmt, ...) NOBUILD_PRINTF_FORMAT(1, 2);
#define INFO(fmt, ...) info("%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
void warn(const char *fmt, ...) NOBUILD_PRINTF_FORMAT(1, 2);
#define WARN(fmt, ...) warn("%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
void erro(const char *fmt, ...) NOBUILD_PRINTF_FORMAT(1, 2);
#define ERRO(fmt, ...) erro("%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
void panic(const char *fmt, ...) NOBUILD_PRINTF_FORMAT(1, 2);
#define PANIC(fmt, ...) panic("%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
void todo(const char *fmt, ...) NOBUILD_PRINTF_FORMAT(1, 2);
#define TODO(fmt, ...) todo("%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
void todo_safe(const char *fmt, ...) NOBUILD_PRINTF_FORMAT(1, 2);
#define TODO_SAFE(fmt, ...) todo_safe("%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
////////////////////////////////////////////////////////////////////////////////
#include <stddef.h>
#ifndef NOBUILD__DEPRECATED
# if defined(__GNUC__) || (defined(__clang__) && !defined(_MSC_VER))
# define NOBUILD__DEPRECATED(func) __attribute__ ((deprecated)) func
# elif defined(_MSC_VER)
# define NOBUILD__DEPRECATED(func) __declspec (deprecated) func
# endif
#endif
typedef const char * Cstr;
int cstr_ends_with(Cstr cstr, Cstr postfix);
#define ENDS_WITH(cstr, postfix) cstr_ends_with(cstr, postfix)
int cstr_starts_with(Cstr cstr, Cstr prefix);
#define STARTS_WITH(cstr, prefix) cstr_starts_with(cstr, prefix)
typedef struct {
Cstr *elems;
size_t count;
size_t capacity;
} Cstr_Array;
Cstr_Array cstr_array_make(Cstr first, ...);
#define CSTR_ARRAY_MAKE(first, ...) cstr_array_make(first, ##__VA_ARGS__, NULL)
Cstr_Array cstr_array_append(Cstr_Array cstrs, Cstr cstr);
Cstr_Array cstr_array_remove(Cstr_Array cstrs, Cstr cstr);
Cstr_Array cstr_array_concat(Cstr_Array cstrs_a, Cstr_Array cstrs_b);
int cstr_array_contains(Cstr_Array cstrs, Cstr cstr);
Cstr_Array cstr_array_from_cstr(Cstr cstr, Cstr delim);
#define SPLIT(cstr, delim) cstr_array_from_cstr(cstr, delim)
Cstr cstr_array_join(Cstr sep, Cstr_Array cstrs);
#define JOIN(sep, ...) cstr_array_join(sep, cstr_array_make(__VA_ARGS__, NULL))
#define CONCAT(...) JOIN("", __VA_ARGS__)
////////////////////////////////////////////////////////////////////////////////
#ifndef _WIN32
# include <sys/types.h>
typedef pid_t Pid;
typedef int Fd;
#else
# define WIN32_MEAN_AND_LEAN
# include <windows.h>
typedef HANDLE Pid;
typedef HANDLE Fd;
#endif
#ifndef NOBUILD_PRINTF_FORMAT
# if defined(__GNUC__) || defined(__clang__)
# // https://gcc.gnu.org/onlinedocs/gcc-4.7.2/gcc/Function-Attributes.html
# define NOBUILD_PRINTF_FORMAT(STRING_INDEX, FIRST_TO_CHECK) __attribute__ ((format (printf, STRING_INDEX, FIRST_TO_CHECK)))
# else
# define NOBUILD_PRINTF_FORMAT(STRING_INDEX, FIRST_TO_CHECK)
# endif
#endif
typedef struct {
Fd read;
Fd write;
} Pipe;
Pipe pipe_make(void);
Fd fd_open_for_read(const char *path);
Fd fd_open_for_write(const char *path);
size_t fd_read(Fd fd, void *buf, unsigned long count);
size_t fd_write(Fd fd, void *buf, unsigned long count);
int fd_printf(Fd fd, const char *fmt, ...) NOBUILD_PRINTF_FORMAT(2, 3);
void fd_close(Fd fd);
void pid_wait(Pid pid);
////////////////////////////////////////////////////////////////////////////////
#ifndef _WIN32
# include <sys/types.h>
typedef pid_t Pid;
typedef int Fd;
#else
# define WIN32_MEAN_AND_LEAN
# include <windows.h>
typedef HANDLE Pid;
typedef HANDLE Fd;
#endif
////////////////////////////////////////////////////////////////////////////////
typedef struct {
Cstr_Array line;
} Cmd;
Cstr cmd_show(Cmd cmd);
Pid cmd_run_async(Cmd cmd, Fd *fdin, Fd *fdout);
void cmd_run_sync(Cmd cmd);
// TODO(#1): no way to disable echo in nobuild scripts
// TODO(#2): no way to ignore fails
#define CMD(...) \
do { \
Cmd cmd = { \
.line = cstr_array_make(__VA_ARGS__, NULL) \
}; \
INFO("CMD: %s", cmd_show(cmd)); \
cmd_run_sync(cmd); \
} while (0)
typedef struct {
Cmd *elems;
size_t count;
} Cmd_Array;
typedef enum {
CHAIN_TOKEN_END = 0,
CHAIN_TOKEN_IN,
CHAIN_TOKEN_OUT,
CHAIN_TOKEN_CMD
} Chain_Token_Type;
// A single token for the CHAIN(...) DSL syntax
typedef struct {
Chain_Token_Type type;
Cstr_Array args;
} Chain_Token;
#define CHAIN_IN(path) \
(Chain_Token) { \
.type = CHAIN_TOKEN_IN, \
.args = cstr_array_make(path, NULL) \
}
#define CHAIN_OUT(path) \
(Chain_Token) { \
.type = CHAIN_TOKEN_OUT, \
.args = cstr_array_make(path, NULL) \
}
#define CHAIN_CMD(...) \
(Chain_Token) { \
.type = CHAIN_TOKEN_CMD, \
.args = cstr_array_make(__VA_ARGS__, NULL) \
}
// TODO(#20): pipes do not allow redirecting stderr
typedef struct {
Cstr input_filepath;
Cmd_Array cmds;
Cstr output_filepath;
} Chain;
Chain chain_build_from_tokens(Chain_Token first, ...);
void chain_run_sync(Chain chain);
void chain_echo(Chain chain);
// TODO(#15): PIPE does not report where exactly a syntactic error has happened
#define CHAIN(...) \
do { \
Chain chain = chain_build_from_tokens(__VA_ARGS__, (Chain_Token) {0}); \
chain_echo(chain); \
chain_run_sync(chain); \
} while(0)
////////////////////////////////////////////////////////////////////////////////
#ifndef NOBUILD__DEPRECATED
# if defined(__GNUC__) || (defined(__clang__) && !defined(_MSC_VER))
# define NOBUILD__DEPRECATED(func) __attribute__ ((deprecated)) func
# elif defined(_MSC_VER)
# define NOBUILD__DEPRECATED(func) __declspec (deprecated) func
# endif
#endif
#ifndef _WIN32
# define PATH_SEP "/"
#else
# define PATH_SEP "\\"
#endif
////////////////////////////////////////////////////////////////////////////////
#define PATH(...) JOIN(PATH_SEP, __VA_ARGS__)
Cstr path_no_ext(Cstr path);
#define NOEXT(path) path_no_ext(path)
Cstr path_dirname(Cstr path);
#define DIRNAME(path) path_dirname(path)
Cstr path_basename(Cstr path);
#define BASENAME(path) path_basename(path)
int path_is_dir(Cstr path);
#define IS_DIR(path) path_is_dir(path)
int path_is_file(Cstr path);
#define IS_FILE(path) path_is_file(path)
int path_exists(Cstr path);
#define PATH_EXISTS(path) path_exists(path)
NOBUILD__DEPRECATED(int is_path1_modified_after_path2(Cstr path1, Cstr path2));
int path_is_newer(Cstr path1, Cstr path2);
#define IS_NEWER(path1, path2) path_is_newer(path1, path2)
void path_mkdirs(Cstr_Array path);
#define MKDIRS(...) \
do { \
Cstr_Array path = cstr_array_make(__VA_ARGS__, NULL); \
INFO("MKDIRS: %s", cstr_array_join(PATH_SEP, path)); \
path_mkdirs(path); \
} while (0)
void path_rename(Cstr old_path, Cstr new_path);
#define RENAME(old_path, new_path) \
do { \
INFO("RENAME: %s -> %s", old_path, new_path); \
path_rename(old_path, new_path); \
} while (0)
void path_copy(Cstr old_path, Cstr new_path);
#define COPY(old_path, new_path) \
do { \
INFO("COPY: %s -> %s", old_path, new_path); \
path_copy(old_path, new_path); \
} while(0)
void path_rm(Cstr path);
#define RM(path) \
do { \
INFO("RM: %s", path); \
path_rm(path); \
} while(0)
#define FOREACH_FILE_IN_DIR(file, dirpath, body) \
do { \
struct dirent *dp = NULL; \
DIR *dir = opendir(dirpath); \
if (dir == NULL) { \
PANIC("could not open directory %s: %s", \
dirpath, nobuild__strerror(errno)); \
} \
errno = 0; \
while ((dp = readdir(dir))) { \
const char *file = dp->d_name; \
body; \
} \
\
if (errno > 0) { \
PANIC("could not read directory %s: %s", \
dirpath, nobuild__strerror(errno)); \
} \
\
closedir(dir); \
} while(0)
////////////////////////////////////////////////////////////////////////////////
#define FOREACH_ARRAY(type, elem, array, body) \
for (size_t elem_##index = 0; elem_##index < array.count; ++elem_##index) { \
type *elem = &array.elems[elem_##index]; \
body; \
}
#ifndef REBUILD_URSELF
# if _WIN32
# if defined(__GNUC__)
# define REBUILD_URSELF(binary_path, source_path) CMD("gcc", "-o", binary_path, source_path)
# elif defined(__clang__)
# define REBUILD_URSELF(binary_path, source_path) CMD("clang", "-o", binary_path, source_path)
# elif defined(_MSC_VER)
# define REBUILD_URSELF(binary_path, source_path) CMD("cl.exe", source_path)
# endif
# else
# define REBUILD_URSELF(binary_path, source_path) CMD("cc", "-o", binary_path, source_path)
# endif
#endif
// Go Rebuild Urself™ Technology
//
// How to use it:
// int main(int argc, char** argv) {
// GO_REBUILD_URSELF(argc, argv);
// // actual work
// return 0;
// }
//
// After your added this macro every time you run ./nobuild it will detect
// that you modified its original source code and will try to rebuild itself
// before doing any actual work. So you only need to bootstrap your build system
// once.
//
// The modification is detected by comparing the last modified times of the executable
// and its source code. The same way the make utility usually does it.
//
// The rebuilding is done by using the REBUILD_URSELF macro which you can redefine
// if you need a special way of bootstraping your build system. (which I personally
// do not recommend since the whole idea of nobuild is to keep the process of bootstrapping
// as simple as possible and doing all of the actual work inside of the nobuild)
//
#define GO_REBUILD_URSELF(argc, argv) \
do { \
const char *source_path = __FILE__; \
assert(argc >= 1); \
const char *binary_path = argv[0]; \
\
if (IS_NEWER(source_path, binary_path)) { \
RENAME(binary_path, CONCAT(binary_path, ".old")); \
REBUILD_URSELF(binary_path, source_path); \
Cmd cmd = { \
.line = { \
.elems = (Cstr*) argv, \
.count = argc, \
}, \
}; \
INFO("CMD: %s", cmd_show(cmd)); \
cmd_run_sync(cmd); \
exit(0); \
} \
} while(0)
char *shift_args(int *argc, char ***argv);
void file_to_c_array(Cstr path, Cstr out_path, Cstr array_type, Cstr array_name, int null_term);
#define FILE_TO_C_ARRAY(path, out_path, array_name) file_to_c_array(path, out_path, "unsigned char", array_name, 1)
#endif // NOBUILD_H_
////////////////////////////////////////////////////////////////////////////////
#ifdef NOBUILD_IMPLEMENTATION
////////////////////////////////////////////////////////////////////////////////
#include <stdlib.h>
void nobuild__vlog(FILE *stream, const char *tag, const char *fmt, va_list args)
{
fprintf(stream, "[%s] ", tag);
vfprintf(stream, fmt, args);
fprintf(stream, "\n");
}
void VLOG(FILE *stream, const char *tag, const char *fmt, va_list args)
{
WARN("This function is deprecated.");
nobuild__vlog(stream, tag, fmt, args);
}
void info(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
nobuild__vlog(stderr, "INFO", fmt, args);
va_end(args);
}
void warn(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
nobuild__vlog(stderr, "WARN", fmt, args);
va_end(args);
}
void erro(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
nobuild__vlog(stderr, "ERRO", fmt, args);
va_end(args);
}
void panic(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
nobuild__vlog(stderr, "ERRO", fmt, args);
va_end(args);
exit(1);
}
void todo(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
nobuild__vlog(stderr, "TODO", fmt, args);
va_end(args);
exit(1);
}
void todo_safe(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
nobuild__vlog(stderr, "TODO", fmt, args);
va_end(args);
}
////////////////////////////////////////////////////////////////////////////////
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
////////////////////////////////////////////////////////////////////////////////
// Multiple modules could define this function, so add a guard around it to prevent redefinition
#ifndef NOBUILD__STRERROR
#define NOBUILD__STRERROR
Cstr nobuild__strerror(int errnum)
{
#ifndef _WIN32
return strerror(errnum);
#else
static char buffer[1024];
strerror_s(buffer, 1024, errnum);
return buffer;
#endif
}
#endif // NOBUILD__STRERROR
int cstr_ends_with(Cstr cstr, Cstr postfix)
{
const size_t cstr_len = strlen(cstr);
const size_t postfix_len = strlen(postfix);
return postfix_len <= cstr_len
&& strcmp(cstr + cstr_len - postfix_len, postfix) == 0;
}
int cstr_starts_with(Cstr cstr, Cstr prefix)
{
const size_t cstr_len = strlen(cstr);
const size_t prefix_len = strlen(prefix);
return prefix_len <= cstr_len && strncmp(cstr, prefix, prefix_len) == 0;
}
Cstr_Array cstr_array_make(Cstr first, ...)
{
Cstr_Array result = {0};
if (first == NULL) {
return result;
}
result.count += 1;
va_list args;
va_start(args, first);
for (Cstr next = va_arg(args, Cstr);
next != NULL;
next = va_arg(args, Cstr)) {
result.count += 1;
}
va_end(args);
result.elems = malloc(sizeof *result.elems * result.count);
if (result.elems == NULL) {
PANIC("could not allocate memory: %s", nobuild__strerror(errno));
}
result.count = 0;
result.elems[result.count++] = first;
va_start(args, first);
for (Cstr next = va_arg(args, Cstr);
next != NULL;
next = va_arg(args, Cstr)) {
result.elems[result.count++] = next;
}
va_end(args);
return result;
}
Cstr_Array cstr_array_append(Cstr_Array cstrs, Cstr cstr)
{
if (cstrs.capacity < 1) {
cstrs.elems = realloc(cstrs.elems, sizeof *cstrs.elems * (cstrs.count + 10));
cstrs.capacity += 10;
if (cstrs.elems == NULL) {
PANIC("Could not allocate memory: %s", nobuild__strerror(errno));
}
}
cstrs.elems[cstrs.count++] = cstr;
cstrs.capacity--;
return cstrs;
}
Cstr_Array cstr_array_remove(Cstr_Array cstrs, Cstr cstr)
{
if (cstrs.count == 0) {
return cstrs;
}
if (cstr == NULL) {
cstrs.elems[--cstrs.count];
cstrs.capacity++;
return cstrs;
}
// Find the index of the element to be removed
const size_t cstr_len = strlen(cstr);
for (size_t i = 0; i < cstrs.count; i++) {
const size_t elem_len = strlen(cstrs.elems[i]);
if (elem_len != cstr_len || strcmp(cstrs.elems[i], cstr) != 0) {
continue;
}
// Shift elements left if found the cstr
for (size_t j = i; j < cstrs.count - 1; j++) {
cstrs.elems[j] = cstrs.elems[j + 1];
}
cstrs.count--;
cstrs.capacity++;
// TODO: Might want to realloc array if capacity is too high
return cstrs;
}
// The string was not found
return cstrs;
}
Cstr_Array cstr_array_concat(Cstr_Array cstrs_a, Cstr_Array cstrs_b)
{
if (cstrs_a.capacity < cstrs_b.count) {
cstrs_a.elems = realloc(cstrs_a.elems, sizeof *cstrs_a.elems * (cstrs_a.count + cstrs_b.count));
cstrs_a.capacity += cstrs_b.count;
if (cstrs_a.elems == NULL) {
PANIC("Could not allocate memory: %s", nobuild__strerror(errno));
}
}
memcpy(cstrs_a.elems + cstrs_a.count, cstrs_b.elems, sizeof *cstrs_a.elems * cstrs_b.count);
cstrs_a.count += cstrs_b.count;
cstrs_a.capacity -= cstrs_b.count;
return cstrs_a;
}
int cstr_array_contains(Cstr_Array cstrs, Cstr cstr) {
for (size_t i = 0; i < cstrs.count; ++i) {
if (strcmp(cstr, cstrs.elems[i]) == 0) {
return 1;
}
}
return 0;
}
Cstr_Array cstr_array_from_cstr(Cstr cstr, Cstr delim)
{
size_t len = strlen(cstr);
size_t d_len = strlen(delim);
size_t substr_count = 1;
for (size_t i = 0; i < len; ++i) {
if ((len - i) < d_len) {
break;
}
size_t delim_found = 0;
for (size_t j = 0; j < d_len; ++j) {
if (cstr[i+j] != delim[j]) {
delim_found = 0;
break;
}
delim_found = 1;
}
if (delim_found) {
substr_count++;
i += d_len - 1;
}
}
// if dlen == 0 or was never found
if (substr_count == 1) {
// TODO: differentiate between delim == null and delim == "" and delim not found
// Split the string into an array of strings, where each string is a single character
return cstr_array_make(cstr);
}
Cstr_Array ret = { .count = substr_count };
ret.elems = malloc(sizeof(Cstr) * ret.count);
if (ret.elems == NULL) {
PANIC("Could not allocate memory: %s", nobuild__strerror(errno));
}
size_t substr_start = 0;
size_t substr_index = 0;
for (size_t i = 0; i < len; ++i) {
if ((len - i) < d_len) {
break;
}
size_t delim_found = 0;
for (size_t j = 0; j < d_len; ++j) {
if (cstr[i+j] != delim[j]) {
delim_found = 0;
break;
}
delim_found = 1;
}
if (!delim_found) {
continue;
}
size_t substr_len = i - substr_start;
char *substr = calloc(substr_len + 1, sizeof(unsigned char));
if (substr == NULL) {
PANIC("Could not allocate memory: %s", nobuild__strerror(errno));
}
ret.elems[substr_index++] = memcpy(substr, (cstr+substr_start), substr_len * sizeof(unsigned char));
i += d_len - 1;
substr_start = i + 1;
}
// Add the last substring
size_t substr_len = len - substr_start;
char *substr = malloc(substr_len * sizeof(unsigned char));
if (substr == NULL) {
PANIC("Could not allocate memory: %s", nobuild__strerror(errno));
}
ret.elems[substr_index++] = memcpy(substr, (cstr+substr_start), substr_len * sizeof(unsigned char));
return ret;
}
Cstr cstr_array_join(Cstr sep, Cstr_Array cstrs)
{
if (cstrs.count == 0) {
return "";
}
const size_t sep_len = strlen(sep);
size_t len = 0;
for (size_t i = 0; i < cstrs.count; ++i) {
len += strlen(cstrs.elems[i]);
}
const size_t result_len = (cstrs.count - 1) * sep_len + len + 1;
char *result = malloc(sizeof(char) * result_len);
if (result == NULL) {
PANIC("could not allocate memory: %s", nobuild__strerror(errno));
}
len = 0;
for (size_t i = 0; i < cstrs.count; ++i) {
if (i > 0) {
memcpy(result + len, sep, sep_len);
len += sep_len;
}
size_t elem_len = strlen(cstrs.elems[i]);
memcpy(result + len, cstrs.elems[i], elem_len);
len += elem_len;
}
result[len] = '\0';
return result;
}
////////////////////////////////////////////////////////////////////////////////
#ifndef _WIN32
# include <sys/wait.h>
# include <sys/stat.h>
# include <unistd.h>
# include <fcntl.h>
// Avoid requiring the user to define `_POSIX_C_SOURCE` as `200809L`
char *strsignal(int sig);
#else
# include <assert.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
////////////////////////////////////////////////////////////////////////////////
// Multiple modules could define this function, so add a guard around it to prevent redefinition
#if defined(_WIN32) && !defined(NOBUILD__GETLASTERROR)
#define NOBUILD__GETLASTERROR
LPSTR nobuild__GetLastErrorAsString(void)
{
// https://stackoverflow.com/q/1387064/21582981
DWORD errorMessageId = GetLastError();
assert(errorMessageId != 0);
LPSTR messageBuffer = NULL;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, // DWORD dwFlags,
NULL, // LPCVOID lpSource,
errorMessageId, // DWORD dwMessageId,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // DWORD dwLanguageId,
(LPSTR) &messageBuffer, // LPTSTR lpBuffer,
0, // DWORD nSize,
NULL // va_list *Arguments
);
return messageBuffer;
}
#endif // NOBUILD__GETLASTERROR
Pipe pipe_make(void)
{
Pipe pip = {0};
#ifndef _WIN32
Fd pipefd[2];
if (pipe(pipefd) < 0) {
PANIC("Could not create pipe: %s", strerror(errno));
}
pip.read = pipefd[0];
pip.write = pipefd[1];
#else
// https://docs.microsoft.com/en-us/windows/win32/ProcThread/creating-a-child-process-with-redirected-input-and-output
SECURITY_ATTRIBUTES saAttr = {0};
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
if (!CreatePipe(&pip.read, &pip.write, &saAttr, 0)) {
PANIC("Could not create pipe: %s", nobuild__GetLastErrorAsString());
}
#endif // _WIN32
return pip;
}
Fd fd_open_for_read(const char *path)
{
#ifndef _WIN32
Fd result = open(path, O_RDONLY);
if (result < 0) {
PANIC("Could not open file %s: %s", path, strerror(errno));
}
return result;
#else
// https://docs.microsoft.com/en-us/windows/win32/fileio/opening-a-file-for-reading-or-writing
SECURITY_ATTRIBUTES saAttr = {0};
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
Fd result = CreateFile(
path,
GENERIC_READ,
0,
&saAttr,
OPEN_EXISTING,
FILE_ATTRIBUTE_READONLY,
NULL);
if (result == INVALID_HANDLE_VALUE) {
PANIC("Could not open file %s", path);
}
return result;
#endif // _WIN32
}
Fd fd_open_for_write(const char *path)
{
#ifndef _WIN32
Fd result = open(path,
O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (result < 0) {
PANIC("Could not open file %s: %s", path, strerror(errno));
}
return result;
#else
SECURITY_ATTRIBUTES saAttr = {0};
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
Fd result = CreateFile(
path, // name of the write
GENERIC_WRITE, // open for writing
0, // do not share
&saAttr, // default security
CREATE_ALWAYS, // Same as `O_CREAT | O_TRUNC`
FILE_ATTRIBUTE_NORMAL, // normal file
NULL // no attr. template
);
if (result == INVALID_HANDLE_VALUE) {
PANIC("Could not open file %s: %s", path, nobuild__GetLastErrorAsString());
}
return result;
#endif // _WIN32
}
size_t fd_read(Fd fd, void *buf, unsigned long count)
{
#ifndef _WIN32
ssize_t bytes = read(fd, buf, count);
if (bytes == -1) {
ERRO("Read error: %s", strerror(errno));
return 0;
}
#else
DWORD bytes;
if (!ReadFile(fd, buf, count, &bytes, NULL)) {
ERRO("Read error: %s", nobuild__GetLastErrorAsString());
return 0;
}
#endif
return (size_t) bytes;
}
size_t fd_write(Fd fd, void *buf, unsigned long count)
{
#ifndef _WIN32
ssize_t bytes = read(fd, buf, (size_t) count);
if (bytes == -1) {
ERRO("Write error: %s", strerror(errno));
return 0;
}
#else
DWORD bytes;
if (!WriteFile(fd, buf, count, &bytes, NULL)) {
ERRO("Write error: %s", nobuild__GetLastErrorAsString());
return 0;
}
#endif
return (size_t) bytes;
}
int fd_printf(Fd fd, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
int len = vsnprintf(NULL, 0, fmt, args);
va_end(args);
if (len < 0) {
return len;
}
// MSVC does not support variable length arrays
#ifndef _WIN32
char buffer[len + 1];
#else
char *buffer = malloc(sizeof *buffer * (len + 1));
#endif
va_start(args, fmt);
int result = vsnprintf(buffer, (size_t)(len + 1), fmt, args);
va_end(args);
if (result < 0) {
return result;
}
fd_write(fd, buffer, (unsigned long) result);
#ifdef _WIN32
free(buffer);
#endif
return result;
}
void fd_close(Fd fd)
{
#ifndef _WIN32
close(fd);
#else
CloseHandle(fd);
#endif // _WIN32
}
void pid_wait(Pid pid)
{
#ifndef _WIN32
for (;;) {
int wstatus = 0;
if (waitpid(pid, &wstatus, 0) < 0) {
PANIC("Could not wait on command (pid %d): %s", pid, strerror(errno));
}
if (WIFEXITED(wstatus)) {
int exit_status = WEXITSTATUS(wstatus);
if (exit_status != 0) {
PANIC("Command exited with exit code %d", exit_status);
}
break;
}
if (WIFSIGNALED(wstatus)) {
PANIC("Command process was terminated by %s", strsignal(WTERMSIG(wstatus)));
}
}
#else
DWORD result = WaitForSingleObject(
pid, // HANDLE hHandle,
INFINITE // DWORD dwMilliseconds
);
if (result == WAIT_FAILED) {
PANIC("Could not wait on child process: %s", nobuild__GetLastErrorAsString());
}
DWORD exit_status;
if (GetExitCodeProcess(pid, &exit_status) == 0) {
PANIC("Could not get process exit code: %lu", GetLastError());
}
if (exit_status != 0) {
PANIC("Command exited with exit code %lu", exit_status);
}