diff options
Diffstat (limited to 'io.c')
| -rw-r--r-- | io.c | 86 |
1 files changed, 0 insertions, 86 deletions
@@ -1,86 +0,0 @@ -#define _XOPEN_SOURCE 700 -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/stat.h> -#include <unistd.h> - -#include "more.h" - -ssize_t more_getline(struct more_file *mf, size_t lineno) -{ - if (mf->nlines <= lineno && mf->nlines != 0) { - fsetpos(mf->f, &(mf->tlines[mf->nlines - 1])); - getline(&(mf->buf), &(mf->nbuf), mf->f); - } - - while (mf->nlines <= lineno) { - mf->nlines++; - mf->tlines = realloc(mf->tlines, mf->nlines * sizeof(*mf->tlines)); - mf->bytepos = realloc(mf->bytepos, mf->nlines * sizeof(*mf->bytepos)); - - fgetpos(mf->f, &(mf->tlines[mf->nlines - 1])); - - if (getline(&(mf->buf), &(mf->nbuf), mf->f) == -1) { - return -1; - } - - if (mf->nlines > 1) { - mf->bytepos[mf->nlines - 1] = mf->bytepos[mf->nlines - 2] + strlen(mf->buf); - } else { - mf->bytepos[0] = 0; - } - - if (mf->backing != mf->f) { - fgetpos(mf->backing, &(mf->tlines[mf->nlines - 1])); - fputs(mf->buf, mf->backing); - } - } - - fsetpos(mf->backing, &(mf->tlines[lineno])); - return getline(&(mf->buf), &(mf->nbuf), mf->backing); -} - -struct more_file more_open(const char *path) -{ - struct more_file mf = { - .f = stdin, - }; - - if (strcmp(path, "-")) { - mf.f = fopen(path, "r"); - if (!mf.f) { - fprintf(stderr, "more: %s: %s\r\n", path, strerror(errno)); - return mf; - } - } - - fpos_t pos; - if (fgetpos(mf.f, &pos) != 0) { - mf.backing = tmpfile(); - } else { - mf.backing = mf.f; - struct stat st; - fstat(fileno(mf.f), &st); - mf.nbytes = st.st_size; - } - mf.path = strdup(path); - - return mf; -} - -void more_close(struct more_file *mf) -{ - if (mf->backing != mf->f) { - fclose(mf->backing); - } - - if (mf->f != stdin) { - fclose(mf->f); - } - - free(mf->tlines); - free(mf->buf); - free(mf->path); -} |