110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
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This file is part of LibMaxsi.
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LibMaxsi is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
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stdio.c
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Sets up stdin, stdout, stderr.
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******************************************************************************/
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#define __SORTIX_STDLIB_REDIRECTS 0
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "fdio.h"
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FILE* stdin;
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FILE* stdout;
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FILE* stderr;
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int init_stdio()
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{
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stdin = fdio_newfile(0, "r");
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stdout = fdio_newfile(1, "w");
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stderr = fdio_newfile(2, "w");
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return 0;
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}
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int getchar(void)
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{
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return fgetc(stdin);
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}
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int putchar(int c)
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{
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return fputc(c, stdout);
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}
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ssize_t getdelim(char** lineptr, size_t* n, int delim, FILE* fp)
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{
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if ( !lineptr || (*lineptr && !n) || !fp ) { errno = EINVAL; return -1; }
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const size_t DEFAULT_BUFSIZE = 32UL;
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int malloced = !*lineptr;
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if ( malloced ) { *lineptr = (char*) malloc(DEFAULT_BUFSIZE); }
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if ( !*lineptr ) { return -1; }
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size_t bufsize = malloced ? DEFAULT_BUFSIZE : *n;
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if ( n ) { *n = bufsize; }
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ssize_t written = 0;
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int c;
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do
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{
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if ( (c = getc(fp)) == EOF )
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{
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if ( written ) { break; } else { goto cleanup; }
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}
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if ( bufsize <= (size_t) written + 1UL )
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{
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size_t newbufsize = 2UL * bufsize;
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char* newbuf = (char*) realloc(*lineptr, newbufsize);
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if ( !newbuf ) { goto cleanup; }
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bufsize = newbufsize;
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if ( n ) { *n = bufsize; }
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*lineptr = newbuf;
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}
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(*lineptr)[written++] = c;
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} while ( c != delim );
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(*lineptr)[written] = 0;
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return written;
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cleanup:
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free(malloced ? *lineptr : NULL);
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return -1;
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}
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ssize_t getline(char** lineptr, size_t* n, FILE* fp)
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{
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return getdelim(lineptr, n, '\n', fp);
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}
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char* sortix_gets(void)
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{
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char* buf = NULL;
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size_t n;
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if ( getline(&buf, &n, stdin) < 0 ) { return NULL; }
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size_t linelen = strlen(buf);
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if ( linelen && buf[linelen-1] == '\n' ) { buf[linelen-1] = 0; }
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return buf;
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}
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int puts(const char* str)
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{
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return printf("%s\n", str) < 0 ? EOF : 1;
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}
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