65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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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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/*
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* Continue reading from file until the terminating string is encountered.
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* Return data as string.
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* e.g. fgets_str(file, "\n"); will read till end of file
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*/
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char *fgets_str(FILE *file, const char *terminating_string)
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{
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char *linebuf = NULL;
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const int term_length = strlen(terminating_string);
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int end_string_offset;
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int linebufsz = 0;
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int idx = 0;
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int ch;
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while (1) {
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ch = fgetc(file);
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if (ch == EOF) {
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break;
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}
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/* grow the line buffer as necessary */
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while (idx > linebufsz - 2) {
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linebuf = realloc(linebuf, linebufsz += 1000); /* GROWBY */
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}
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linebuf[idx] = ch;
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idx++;
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/* Check for terminating string */
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end_string_offset = idx - term_length;
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if ((end_string_offset > 0) && (memcmp(&linebuf[end_string_offset], terminating_string, term_length) == 0)) {
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idx -= term_length;
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break;
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}
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}
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if (idx == 0 || linebuf[0] == '\n') {
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return NULL;
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}
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linebuf[idx] = '\0';
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return(linebuf);
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}
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