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Fix .gitignore and b_create()

This commit is contained in:
Victor Fernandes 2017-01-30 14:29:38 -05:00
parent 9f21bf4b5c
commit 2c8fc9fd7f
3 changed files with 26 additions and 25 deletions
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6
.gitignore vendored
View File

@ -27,8 +27,4 @@ bld/
## Ignore Visual Studio Code temporary files and project settings
.vscode/*
!.vscode/settings.json
!.vscode/tasks.json
!.vscode/launch.json
!.vscode/extensions.json
.vscode/*

44
buffer.c
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@ -3,7 +3,7 @@
* Compiler: GCC 6.2.0
* Author: Victor Fernandes, 040772243
* Course: CST8152 - Compilers, Lab Section: 011
* Date: September 12, 2016
* Date: February 1, 2017
* Professor: Svillen Ravev
* A character buffer utility with three modes of self-incrementation
through dynamic memory allocation, and ability to set a mark flag.
@ -12,8 +12,6 @@
*/
#include <limits.h>
#include <stdlib.h>
#include "buffer.h"
@ -36,18 +34,39 @@ Buffer* b_create(short init_capacity, char inc_factor, char o_mode) {
/* BEGIN CONFIGURING BUFFER */
/* Check if init_capacitt is whithin acceptable range */
/* Check if init_capacity is within acceptable range */
if (init_capacity > SHRT_MAX || init_capacity < MIN_CAPACITY) {
return NULL;
}
/* Leaving cb_head allocation for last in the event of bad input */
/* Memory allocation */
pBD = (Buffer *) calloc(1, sizeof(Buffer));
if (!pBD) {
return NULL; /* Abort execution immediatelly if allocation fails */
}
/* Attempt to allocate memory to cb_head */
/* Check and set operation mode */
if (o_mode == 'f' || inc_factor == FIX_INC_FACTOR) {
pBD->mode = FIX_OP_MODE;
pBD->inc_factor = FIX_INC_FACTOR;
} else if (o_mode == 'a'
&& (inc_factor >= MIN_INC_FACTOR)
&& (inc_factor <= MAX_ADD_INC_FACTOR)) {
pBD->mode = ADD_OP_MODE;
pBD->inc_factor = inc_factor;
} else if (o_mode == 'm'
&& (inc_factor >= MIN_MUL_INC_FACTOR)
&& (inc_factor <= MAX_MUL_INC_FACTOR)) {
pBD->mode = MUL_OP_MODE;
pBD->inc_factor = inc_factor;
} else { /* Abort everything if any parameters are bad */
free(pBD);
return NULL;
}
/* Attempt to initialize cb_head */
pBD->cb_head = (char *) malloc(sizeof(char) * init_capacity);
/* Abort configuration if allocation fails and release memory */
if (!pBD->cb_head) {
@ -55,21 +74,6 @@ Buffer* b_create(short init_capacity, char inc_factor, char o_mode) {
return NULL;
}
/* Check and set operation mode */
if (o_mode == 'f' || inc_factor == FIX_INC_FACTOR) {
pBD->mode = FIX_OP_MODE;
pBD->inc_factor = FIX_INC_FACTOR;
} else if (o_mode == 'a' && (inc_factor >= MIN_INC_FACTOR)) {
pBD->mode = ADD_OP_MODE;
pBD->inc_factor = inc_factor;
} else if (o_mode == 'm' && (inc_factor >= MIN_INC_FACTOR && inc_factor <= MAX_MUL_INC_FACTOR)) {
pBD->mode = MUL_OP_MODE;
pBD->inc_factor = inc_factor;
} else { /* Abort everything if parameters out of range (where applicable) */
free(pBD);
return NULL;
}
pBD->capacity = init_capacity;
/* END CONFIGURING BUFFER */
return pBD;

1
buffer.h
View File

@ -43,6 +43,7 @@
#define MIN_CAPACITY 1 /* minimum character buffer capacity */
#define FIX_INC_FACTOR 0 /* fixed increment factor constant */
#define MIN_INC_FACTOR 1 /* minimum additive increment factor constant */
#define MIN_MUL_INC_FACTOR 1 /* minumum multiplicative increment factor constant */
#define MAX_ADD_INC_FACTOR 255 /* maximum additive increment factor constant */
#define MAX_MUL_INC_FACTOR 100 /* maximum multiplicative increment factor constant */