mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-11-18 19:09:31 +00:00
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
#ifdef __CCFRONT__
|
|
#include <14:pragma.h>
|
|
#endif
|
|
|
|
#include "common.h"
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* char **loadarray (unsigned long n, char *filename, size_t maxlinelen);
|
|
*
|
|
* Pre: <filename> is the name of a file containing <n> lines of text,
|
|
* the number of lines. The file <filename> must be closed.
|
|
* <maxlinelen> is the length of the longest line in <filename>
|
|
*
|
|
* Post: Returns a pointer to an array of pointers to malloc'd strings,
|
|
* where the strings are successive lines from the file <filename>.
|
|
* On return <filename> will be closed. If loadarray() fails for
|
|
* any reason, it will return NULL.
|
|
*
|
|
* Warning: The use of realloc() with a NULL pointer for the initial
|
|
* allocation may not be portable. If this is not valid for your
|
|
* current libraries, then #define BROKEN_REALLOC.
|
|
*
|
|
* Uses Globals:
|
|
* v_flag
|
|
*/
|
|
|
|
char **loadarray (unsigned long n, char *filename, size_t maxlinelen) {
|
|
|
|
char **result;
|
|
unsigned long i,j;
|
|
FILE *in_fp;
|
|
static char *inbuf=NULL;
|
|
static size_t previous_size = 0;
|
|
char *p;
|
|
|
|
|
|
#ifndef BROKEN_REALLOC /* realloc() is ANSI-compliant with NULL first arg */
|
|
|
|
/* reallocate the input buffer if necessary */
|
|
if (maxlinelen > previous_size) {
|
|
if ((p = realloc(inbuf,maxlinelen+1)) == NULL) {
|
|
if (v_flag) perror("loadarray: couldn't (re)allocate input buffer");
|
|
return NULL;
|
|
}
|
|
previous_size = maxlinelen;
|
|
inbuf = p;
|
|
}
|
|
|
|
#else /* BROKEN_REALLOC */
|
|
|
|
/* reallocate the input buffer if necessary */
|
|
if (maxlinelen > previous_size) {
|
|
if (previous_size == 0) {
|
|
if ((p = malloc(maxlinelen+1)) == NULL) {
|
|
if (v_flag) perror("loadarray: couldn't allocate input buffer");
|
|
return NULL;
|
|
}
|
|
} else {
|
|
if ((p = realloc(inbuf,maxlinelen+1)) == NULL) {
|
|
if (v_flag) perror("loadarray: couldn't reallocate input buffer");
|
|
return NULL;
|
|
}
|
|
}
|
|
previous_size = maxlinelen;
|
|
inbuf = p;
|
|
}
|
|
|
|
|
|
#endif /* BROKEN_REALLOC */
|
|
|
|
/* allocate the array */
|
|
if ((result = malloc (n * sizeof(char *)))==NULL) {
|
|
if (v_flag) perror("loadarray: couldn't allocate base array");
|
|
return NULL;
|
|
}
|
|
|
|
/* set up the input stream */
|
|
in_fp = fopen(filename,"r");
|
|
if (in_fp == NULL) { /* open failed */
|
|
free(result);
|
|
if (v_flag) perror("loadarray: couldn't open input file");
|
|
return NULL;
|
|
}
|
|
|
|
/* allocate and copy elements */
|
|
for (i=0; i<n; i++) {
|
|
|
|
/* read into the buffer */
|
|
if(fgets(inbuf,maxlinelen+1,in_fp)==NULL) {
|
|
/* read failed; clean up and exit */
|
|
if (v_flag) {
|
|
if (ferror(in_fp)) perror("loadarray: read error on input file");
|
|
else perror ("loadarray: premature EOF on input file");
|
|
}
|
|
for (j=0; j<i; j++) free(result[j]);
|
|
free(result);
|
|
fclose(in_fp);
|
|
return NULL;
|
|
}
|
|
|
|
/* copy the buffer to the array */
|
|
result[i] = malloc(strlen(inbuf)+1);
|
|
if (result[i]==NULL) {
|
|
/* malloc failed; clean up and exit */
|
|
if (v_flag) perror("loadarray: couldn't duplicate buffer");
|
|
for (j=0; j<i; j++) free(result[j]);
|
|
free(result);
|
|
fclose(in_fp);
|
|
return NULL;
|
|
}
|
|
strcpy(result[i],inbuf);
|
|
}
|
|
|
|
fclose(in_fp);
|
|
return result;
|
|
}
|
|
|