127 lines
2.6 KiB
C
127 lines
2.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdarg.h>
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#include <string.h>
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#include <uchar.h>
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#include <err.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "memory.h"
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#include "fake-lib.h"
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char *ascii(const char16_t *wstr, bool translate_slashes)
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{
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size_t len = 0;
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for (const char16_t *wp = wstr; *wp; wp++)
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len++;
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char *ret = malloc(len + 1);
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char *p = ret;
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for (const char16_t *wp = wstr; *wp; wp++)
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*p++ = (*wp == '\\' && translate_slashes ? '/' :
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*wp < 0x80 ? *wp :
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'?');
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*p = '\0';
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return ret;
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}
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void system_argv_array(char **args)
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{
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pid_t pid = fork();
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if (pid < 0)
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err(1, "fork");
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if (pid == 0) {
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execvp(args[0], args);
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warn("execvp");
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_exit(127);
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}
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int status;
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if (waitpid(pid, &status, 0) != pid)
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err(1, "waitpid");
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if (!(WIFEXITED(status) && WEXITSTATUS(status) == 0))
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errx(1, "subcommand failed");
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}
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void system_argv(const char *cmd, ...)
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{
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int nargs, nchars;
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const char *word;
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va_list ap;
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va_start(ap, cmd);
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nargs = 1; /* terminating NULL */
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nchars = 0;
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for (word = cmd; word; word = va_arg(ap, const char *)) {
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nargs++;
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nchars += 1 + strlen(word);
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}
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va_end(ap);
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char *args[nargs], chars[nchars];
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char **argp = args, *charp = chars;
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va_start(ap, cmd);
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for (word = cmd; word; word = va_arg(ap, const char *)) {
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*argp++ = charp;
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strcpy(charp, word);
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charp += 1 + strlen(word);
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}
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va_end(ap);
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*argp++ = NULL;
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system_argv_array(args);
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}
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void c16cpy(char16_t *out, uint32_t *outsize, char *s)
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{
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uint32_t retlen = 0;
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while (retlen < *outsize) {
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char16_t c = (out[retlen] = (unsigned char)*s++);
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if (!c)
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break;
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retlen++;
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}
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*outsize = retlen;
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}
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char *dupcat(const char *str, ...)
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{
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va_list ap;
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const char *p;
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char *out, *outp;
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size_t len;
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len = 1;
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va_start(ap, str);
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for (p = str; p; p = va_arg(ap, const char *))
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len += strlen(p);
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va_end(ap);
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out = snewn(len, char);
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outp = out;
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va_start(ap, str);
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for (p = str; p; p = va_arg(ap, const char *)) {
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strcpy(outp, p);
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outp += strlen(p);
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}
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va_end(ap);
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return out;
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}
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unsigned le(const unsigned char *buf, size_t len, size_t off, size_t nbytes)
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{
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unsigned toret = 0;
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off += nbytes;
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while (nbytes-- > 0) {
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toret <<= 8;
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if (--off < len)
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toret |= buf[off];
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}
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return toret;
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}
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